15f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===--- PPExpressions.cpp - Preprocessor Expression Evaluation -----------===// 25f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 35f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// The LLVM Compiler Infrastructure 45f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 50bc735ffcfb223c0186419547abaa5c84482663eChris Lattner// This file is distributed under the University of Illinois Open Source 60bc735ffcfb223c0186419547abaa5c84482663eChris Lattner// License. See LICENSE.TXT for details. 75f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 85f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 95f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// This file implements the Preprocessor::EvaluateDirectiveExpression method, 115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// which parses and evaluates integer constant expressions for #if directives. 125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// FIXME: implement testing for #assert's. 165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/Lex/Preprocessor.h" 205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/Lex/MacroInfo.h" 215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/Lex/LiteralSupport.h" 221fbb447e9d43c2c676e94081fbfee7eb6cbe933bDouglas Gregor#include "clang/Lex/CodeCompletionHandler.h" 235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/Basic/TargetInfo.h" 24500d3297d2a21edeac4d46cbcbe21bc2352c2a28Chris Lattner#include "clang/Lex/LexDiagnostic.h" 255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "llvm/ADT/APSInt.h" 269fe8c74a93ac8e92512615c5f83e7a328b3b0544David Blaikie#include "llvm/Support/ErrorHandling.h" 275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerusing namespace clang; 285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 293c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohmannamespace { 303c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohman 318ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner/// PPValue - Represents the value of a subexpression of a preprocessor 328ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner/// conditional and the source range covered by it. 338ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattnerclass PPValue { 348ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner SourceRange Range; 358ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattnerpublic: 368ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner llvm::APSInt Val; 371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 388ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner // Default ctor - Construct an 'invalid' PPValue. 398ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner PPValue(unsigned BitWidth) : Val(BitWidth) {} 401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 418ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner unsigned getBitWidth() const { return Val.getBitWidth(); } 428ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner bool isUnsigned() const { return Val.isUnsigned(); } 431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 448ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner const SourceRange &getRange() const { return Range; } 451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 468ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner void setRange(SourceLocation L) { Range.setBegin(L); Range.setEnd(L); } 478ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner void setRange(SourceLocation B, SourceLocation E) { 481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Range.setBegin(B); Range.setEnd(E); 498ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner } 508ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner void setBegin(SourceLocation L) { Range.setBegin(L); } 518ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner void setEnd(SourceLocation L) { Range.setEnd(L); } 528ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner}; 538ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner 543c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohman} 553c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohman 568ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattnerstatic bool EvaluateDirectiveSubExpr(PPValue &LHS, unsigned MinPrec, 57d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner Token &PeekTok, bool ValueLive, 585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Preprocessor &PP); 595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// DefinedTracker - This struct is used while parsing expressions to keep track 615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// of whether !defined(X) has been seen. 625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// With this simple scheme, we handle the basic forms: 645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// !defined(X) and !defined X 655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// but we also trivially handle (silly) stuff like: 665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// !!!defined(X) and +!defined(X) and !+!+!defined(X) and !(defined(X)). 675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerstruct DefinedTracker { 685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// Each time a Value is evaluated, it returns information about whether the 695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// parsed value is of the form defined(X), !defined(X) or is something else. 705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer enum TrackerState { 715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DefinedMacro, // defined(X) 725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer NotDefinedMacro, // !defined(X) 735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Unknown // Something else. 745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } State; 755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// TheMacro - When the state is DefinedMacro or NotDefinedMacro, this 765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// indicates the macro that was checked. 775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer IdentifierInfo *TheMacro; 785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer}; 795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 80a28cc090f265d5bdaef9ebb24fb9d579928d3a18John Thompson/// EvaluateDefined - Process a 'defined(sym)' expression. 81a3e008abc51933d567303a1b4bd17e68c798f60eChris Lattnerstatic bool EvaluateDefined(PPValue &Result, Token &PeekTok, DefinedTracker &DT, 82a3e008abc51933d567303a1b4bd17e68c798f60eChris Lattner bool ValueLive, Preprocessor &PP) { 83a28cc090f265d5bdaef9ebb24fb9d579928d3a18John Thompson IdentifierInfo *II; 84a28cc090f265d5bdaef9ebb24fb9d579928d3a18John Thompson Result.setBegin(PeekTok.getLocation()); 85a28cc090f265d5bdaef9ebb24fb9d579928d3a18John Thompson 86a28cc090f265d5bdaef9ebb24fb9d579928d3a18John Thompson // Get the next token, don't expand it. 8788710f22be1acb04b7d812aebe87bea56394c07cEli Friedman PP.LexUnexpandedNonComment(PeekTok); 88a28cc090f265d5bdaef9ebb24fb9d579928d3a18John Thompson 89a28cc090f265d5bdaef9ebb24fb9d579928d3a18John Thompson // Two options, it can either be a pp-identifier or a (. 90a28cc090f265d5bdaef9ebb24fb9d579928d3a18John Thompson SourceLocation LParenLoc; 91a28cc090f265d5bdaef9ebb24fb9d579928d3a18John Thompson if (PeekTok.is(tok::l_paren)) { 92a28cc090f265d5bdaef9ebb24fb9d579928d3a18John Thompson // Found a paren, remember we saw it and skip it. 93a28cc090f265d5bdaef9ebb24fb9d579928d3a18John Thompson LParenLoc = PeekTok.getLocation(); 9488710f22be1acb04b7d812aebe87bea56394c07cEli Friedman PP.LexUnexpandedNonComment(PeekTok); 95a28cc090f265d5bdaef9ebb24fb9d579928d3a18John Thompson } 96a28cc090f265d5bdaef9ebb24fb9d579928d3a18John Thompson 971fbb447e9d43c2c676e94081fbfee7eb6cbe933bDouglas Gregor if (PeekTok.is(tok::code_completion)) { 981fbb447e9d43c2c676e94081fbfee7eb6cbe933bDouglas Gregor if (PP.getCodeCompletionHandler()) 991fbb447e9d43c2c676e94081fbfee7eb6cbe933bDouglas Gregor PP.getCodeCompletionHandler()->CodeCompleteMacroName(false); 1007d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis PP.setCodeCompletionReached(); 10188710f22be1acb04b7d812aebe87bea56394c07cEli Friedman PP.LexUnexpandedNonComment(PeekTok); 1021fbb447e9d43c2c676e94081fbfee7eb6cbe933bDouglas Gregor } 1031fbb447e9d43c2c676e94081fbfee7eb6cbe933bDouglas Gregor 104a28cc090f265d5bdaef9ebb24fb9d579928d3a18John Thompson // If we don't have a pp-identifier now, this is an error. 105a28cc090f265d5bdaef9ebb24fb9d579928d3a18John Thompson if ((II = PeekTok.getIdentifierInfo()) == 0) { 106a28cc090f265d5bdaef9ebb24fb9d579928d3a18John Thompson PP.Diag(PeekTok, diag::err_pp_defined_requires_identifier); 107a28cc090f265d5bdaef9ebb24fb9d579928d3a18John Thompson return true; 108a28cc090f265d5bdaef9ebb24fb9d579928d3a18John Thompson } 109a28cc090f265d5bdaef9ebb24fb9d579928d3a18John Thompson 110a28cc090f265d5bdaef9ebb24fb9d579928d3a18John Thompson // Otherwise, we got an identifier, is it defined to something? 111a28cc090f265d5bdaef9ebb24fb9d579928d3a18John Thompson Result.Val = II->hasMacroDefinition(); 112a28cc090f265d5bdaef9ebb24fb9d579928d3a18John Thompson Result.Val.setIsUnsigned(false); // Result is signed intmax_t. 113a28cc090f265d5bdaef9ebb24fb9d579928d3a18John Thompson 114a28cc090f265d5bdaef9ebb24fb9d579928d3a18John Thompson // If there is a macro, mark it used. 115a28cc090f265d5bdaef9ebb24fb9d579928d3a18John Thompson if (Result.Val != 0 && ValueLive) { 116a28cc090f265d5bdaef9ebb24fb9d579928d3a18John Thompson MacroInfo *Macro = PP.getMacroInfo(II); 1170827408865e32789e0ec4b8113a302ccdc531423Argyrios Kyrtzidis PP.markMacroAsUsed(Macro); 118a28cc090f265d5bdaef9ebb24fb9d579928d3a18John Thompson } 119a28cc090f265d5bdaef9ebb24fb9d579928d3a18John Thompson 1203d5f955855cab5a831cc6b9339dc77a7d46f1a30Douglas Gregor // Invoke the 'defined' callback. 1213d5f955855cab5a831cc6b9339dc77a7d46f1a30Douglas Gregor if (PPCallbacks *Callbacks = PP.getPPCallbacks()) 1223d5f955855cab5a831cc6b9339dc77a7d46f1a30Douglas Gregor Callbacks->Defined(PeekTok); 1233d5f955855cab5a831cc6b9339dc77a7d46f1a30Douglas Gregor 124a28cc090f265d5bdaef9ebb24fb9d579928d3a18John Thompson // If we are in parens, ensure we have a trailing ). 125a28cc090f265d5bdaef9ebb24fb9d579928d3a18John Thompson if (LParenLoc.isValid()) { 12688710f22be1acb04b7d812aebe87bea56394c07cEli Friedman // Consume identifier. 12788710f22be1acb04b7d812aebe87bea56394c07cEli Friedman Result.setEnd(PeekTok.getLocation()); 12888710f22be1acb04b7d812aebe87bea56394c07cEli Friedman PP.LexUnexpandedNonComment(PeekTok); 12988710f22be1acb04b7d812aebe87bea56394c07cEli Friedman 130a28cc090f265d5bdaef9ebb24fb9d579928d3a18John Thompson if (PeekTok.isNot(tok::r_paren)) { 131a28cc090f265d5bdaef9ebb24fb9d579928d3a18John Thompson PP.Diag(PeekTok.getLocation(), diag::err_pp_missing_rparen) << "defined"; 132a28cc090f265d5bdaef9ebb24fb9d579928d3a18John Thompson PP.Diag(LParenLoc, diag::note_matching) << "("; 133a28cc090f265d5bdaef9ebb24fb9d579928d3a18John Thompson return true; 134a28cc090f265d5bdaef9ebb24fb9d579928d3a18John Thompson } 135a28cc090f265d5bdaef9ebb24fb9d579928d3a18John Thompson // Consume the ). 136a28cc090f265d5bdaef9ebb24fb9d579928d3a18John Thompson Result.setEnd(PeekTok.getLocation()); 137a28cc090f265d5bdaef9ebb24fb9d579928d3a18John Thompson PP.LexNonComment(PeekTok); 13888710f22be1acb04b7d812aebe87bea56394c07cEli Friedman } else { 13988710f22be1acb04b7d812aebe87bea56394c07cEli Friedman // Consume identifier. 14088710f22be1acb04b7d812aebe87bea56394c07cEli Friedman Result.setEnd(PeekTok.getLocation()); 14188710f22be1acb04b7d812aebe87bea56394c07cEli Friedman PP.LexNonComment(PeekTok); 142a28cc090f265d5bdaef9ebb24fb9d579928d3a18John Thompson } 143a28cc090f265d5bdaef9ebb24fb9d579928d3a18John Thompson 144a28cc090f265d5bdaef9ebb24fb9d579928d3a18John Thompson // Success, remember that we saw defined(X). 145a28cc090f265d5bdaef9ebb24fb9d579928d3a18John Thompson DT.State = DefinedTracker::DefinedMacro; 146a28cc090f265d5bdaef9ebb24fb9d579928d3a18John Thompson DT.TheMacro = II; 147a28cc090f265d5bdaef9ebb24fb9d579928d3a18John Thompson return false; 148a28cc090f265d5bdaef9ebb24fb9d579928d3a18John Thompson} 149a28cc090f265d5bdaef9ebb24fb9d579928d3a18John Thompson 1505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// EvaluateValue - Evaluate the token PeekTok (and any others needed) and 1515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// return the computed value in Result. Return true if there was an error 1525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// parsing. This function also returns information about the form of the 1535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// expression in DT. See above for information on what DT means. 1545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 1555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// If ValueLive is false, then this value is being evaluated in a context where 1565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// the result is not used. As such, avoid diagnostics that relate to 1575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// evaluation. 1588ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattnerstatic bool EvaluateValue(PPValue &Result, Token &PeekTok, DefinedTracker &DT, 1598ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner bool ValueLive, Preprocessor &PP) { 1605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DT.State = DefinedTracker::Unknown; 1611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 162f29c5233085a5af795c3c01b94d319e5b3235d56Douglas Gregor if (PeekTok.is(tok::code_completion)) { 163f29c5233085a5af795c3c01b94d319e5b3235d56Douglas Gregor if (PP.getCodeCompletionHandler()) 164f29c5233085a5af795c3c01b94d319e5b3235d56Douglas Gregor PP.getCodeCompletionHandler()->CodeCompletePreprocessorExpression(); 1657d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis PP.setCodeCompletionReached(); 16688710f22be1acb04b7d812aebe87bea56394c07cEli Friedman PP.LexNonComment(PeekTok); 167f29c5233085a5af795c3c01b94d319e5b3235d56Douglas Gregor } 168f29c5233085a5af795c3c01b94d319e5b3235d56Douglas Gregor 1695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If this token's spelling is a pp-identifier, check to see if it is 1705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // 'defined' or if it is a macro. Note that we check here because many 1715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // keywords are pp-identifiers, so we can't check the kind. 1725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (IdentifierInfo *II = PeekTok.getIdentifierInfo()) { 173f880662e5ee532616a6602bdb7c1be45d276af9dChris Lattner // Handle "defined X" and "defined(X)". 174f880662e5ee532616a6602bdb7c1be45d276af9dChris Lattner if (II->isStr("defined")) 175a28cc090f265d5bdaef9ebb24fb9d579928d3a18John Thompson return(EvaluateDefined(Result, PeekTok, DT, ValueLive, PP)); 176f880662e5ee532616a6602bdb7c1be45d276af9dChris Lattner 177f880662e5ee532616a6602bdb7c1be45d276af9dChris Lattner // If this identifier isn't 'defined' or one of the special 178f880662e5ee532616a6602bdb7c1be45d276af9dChris Lattner // preprocessor keywords and it wasn't macro expanded, it turns 179f880662e5ee532616a6602bdb7c1be45d276af9dChris Lattner // into a simple 0, unless it is the C++ keyword "true", in which case it 180f880662e5ee532616a6602bdb7c1be45d276af9dChris Lattner // turns into "1". 181f880662e5ee532616a6602bdb7c1be45d276af9dChris Lattner if (ValueLive) 182f880662e5ee532616a6602bdb7c1be45d276af9dChris Lattner PP.Diag(PeekTok, diag::warn_pp_undef_identifier) << II; 183f880662e5ee532616a6602bdb7c1be45d276af9dChris Lattner Result.Val = II->getTokenID() == tok::kw_true; 184f880662e5ee532616a6602bdb7c1be45d276af9dChris Lattner Result.Val.setIsUnsigned(false); // "0" is signed intmax_t 0. 185f880662e5ee532616a6602bdb7c1be45d276af9dChris Lattner Result.setRange(PeekTok.getLocation()); 186f880662e5ee532616a6602bdb7c1be45d276af9dChris Lattner PP.LexNonComment(PeekTok); 187f880662e5ee532616a6602bdb7c1be45d276af9dChris Lattner return false; 1885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (PeekTok.getKind()) { 1915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer default: // Non-value token. 192d98d975ccdce7ec442ac26f682404cb71df40ff8Chris Lattner PP.Diag(PeekTok, diag::err_pp_expr_bad_token_start_expr); 1935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return true; 19484021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne case tok::eod: 1955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::r_paren: 1965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If there is no expression, report and exit. 1975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.Diag(PeekTok, diag::err_pp_expected_value_in_expr); 1985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return true; 1995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::numeric_constant: { 200f7ccbad5d9949e7ddd1cbef43d482553b811e026Dylan Noblesmith SmallString<64> IntegerBuffer; 20150f6af7a6d6951a63f3da7d4c5a7d3965bf73b63Douglas Gregor bool NumberInvalid = false; 2025f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef Spelling = PP.getSpelling(PeekTok, IntegerBuffer, 20350f6af7a6d6951a63f3da7d4c5a7d3965bf73b63Douglas Gregor &NumberInvalid); 20450f6af7a6d6951a63f3da7d4c5a7d3965bf73b63Douglas Gregor if (NumberInvalid) 20550f6af7a6d6951a63f3da7d4c5a7d3965bf73b63Douglas Gregor return true; // a diagnostic was already reported 20650f6af7a6d6951a63f3da7d4c5a7d3965bf73b63Douglas Gregor 207aeb863c3b4f1b1f38a524d21570c17aa8fd9e9c9Benjamin Kramer NumericLiteralParser Literal(Spelling.begin(), Spelling.end(), 2085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PeekTok.getLocation(), PP); 2095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (Literal.hadError) 2105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return true; // a diagnostic was already reported. 2111eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2126e400c286b485e28d04a742ea87860ddfefa672eChris Lattner if (Literal.isFloatingLiteral() || Literal.isImaginary) { 2135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.Diag(PeekTok, diag::err_pp_illegal_floating_literal); 2145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return true; 2155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(Literal.isIntegerLiteral() && "Unknown ppnumber"); 2175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 218b453ad3214d00acc51c9aa702c76c58354d84b84Richard Smith // Complain about, and drop, any ud-suffix. 219b453ad3214d00acc51c9aa702c76c58354d84b84Richard Smith if (Literal.hasUDSuffix()) 220b453ad3214d00acc51c9aa702c76c58354d84b84Richard Smith PP.Diag(PeekTok, diag::err_pp_invalid_udl) << /*integer*/1; 221b453ad3214d00acc51c9aa702c76c58354d84b84Richard Smith 222b94495155dd551ee81ad0c1865acd9ff1bbd632dNeil Booth // long long is a C99 feature. 2234e4d08403ca5cfd4d558fa2936215d3a4e5a528dDavid Blaikie if (!PP.getLangOpts().C99 && Literal.isLongLong) 2244e4d08403ca5cfd4d558fa2936215d3a4e5a528dDavid Blaikie PP.Diag(PeekTok, PP.getLangOpts().CPlusPlus0x ? 225661a99690bc133bbaa029da925481d4a860dec90Richard Smith diag::warn_cxx98_compat_longlong : diag::ext_longlong); 226b94495155dd551ee81ad0c1865acd9ff1bbd632dNeil Booth 2275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Parse the integer literal into Result. 2288ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner if (Literal.GetIntegerValue(Result.Val)) { 2295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Overflow parsing integer literal. 2305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (ValueLive) PP.Diag(PeekTok, diag::warn_integer_too_large); 2318ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner Result.Val.setIsUnsigned(true); 2325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 2335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Set the signedness of the result to match whether there was a U suffix 2345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // or not. 2358ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner Result.Val.setIsUnsigned(Literal.isUnsigned); 2361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Detect overflow based on whether the value is signed. If signed 2385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // and if the value is too large, emit a warning "integer constant is so 2395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // large that it is unsigned" e.g. on 12345678901234567890 where intmax_t 2405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // is 64-bits. 2418ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner if (!Literal.isUnsigned && Result.Val.isNegative()) { 242b081a350b5cad21e5cbea74c618701e8b839c4f6Chris Lattner // Don't warn for a hex literal: 0x8000..0 shouldn't warn. 243b081a350b5cad21e5cbea74c618701e8b839c4f6Chris Lattner if (ValueLive && Literal.getRadix() != 16) 2448ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner PP.Diag(PeekTok, diag::warn_integer_too_large_for_signed); 2458ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner Result.Val.setIsUnsigned(true); 2465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Consume the token. 2508ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner Result.setRange(PeekTok.getLocation()); 2515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.LexNonComment(PeekTok); 2525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 2535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2545cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor case tok::char_constant: // 'x' 2555cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor case tok::wide_char_constant: { // L'x' 2565cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor case tok::utf16_char_constant: // u'x' 2575cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor case tok::utf32_char_constant: // U'x' 25899831e4677a7e2e051af636221694d60ba31fcdbRichard Smith // Complain about, and drop, any ud-suffix. 25999831e4677a7e2e051af636221694d60ba31fcdbRichard Smith if (PeekTok.hasUDSuffix()) 260b453ad3214d00acc51c9aa702c76c58354d84b84Richard Smith PP.Diag(PeekTok, diag::err_pp_invalid_udl) << /*character*/0; 26199831e4677a7e2e051af636221694d60ba31fcdbRichard Smith 262f7ccbad5d9949e7ddd1cbef43d482553b811e026Dylan Noblesmith SmallString<32> CharBuffer; 26350f6af7a6d6951a63f3da7d4c5a7d3965bf73b63Douglas Gregor bool CharInvalid = false; 2645f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef ThisTok = PP.getSpelling(PeekTok, CharBuffer, &CharInvalid); 26550f6af7a6d6951a63f3da7d4c5a7d3965bf73b63Douglas Gregor if (CharInvalid) 26650f6af7a6d6951a63f3da7d4c5a7d3965bf73b63Douglas Gregor return true; 267ddeea5644367c9c153c9fee9e51bdea85ce43cbdBenjamin Kramer 268ddeea5644367c9c153c9fee9e51bdea85ce43cbdBenjamin Kramer CharLiteralParser Literal(ThisTok.begin(), ThisTok.end(), 2695cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor PeekTok.getLocation(), PP, PeekTok.getKind()); 2705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (Literal.hadError()) 2715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return true; // A diagnostic was already emitted. 2725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Character literals are always int or wchar_t, expand to intmax_t. 274444be7366d0a1e172c0290a1ea54c1cb16b5947cDaniel Dunbar const TargetInfo &TI = PP.getTargetInfo(); 2752a1c363f38e59a5044fc349aa7e538a50954c244Eli Friedman unsigned NumBits; 2762a1c363f38e59a5044fc349aa7e538a50954c244Eli Friedman if (Literal.isMultiChar()) 2772a1c363f38e59a5044fc349aa7e538a50954c244Eli Friedman NumBits = TI.getIntWidth(); 278f5c209d23b20ada4a9b6235db50317239cbf6ae1Alisdair Meredith else if (Literal.isWide()) 279f5c209d23b20ada4a9b6235db50317239cbf6ae1Alisdair Meredith NumBits = TI.getWCharWidth(); 2805cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor else if (Literal.isUTF16()) 2815cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor NumBits = TI.getChar16Width(); 2825cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor else if (Literal.isUTF32()) 2835cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor NumBits = TI.getChar32Width(); 2842a1c363f38e59a5044fc349aa7e538a50954c244Eli Friedman else 285f5c209d23b20ada4a9b6235db50317239cbf6ae1Alisdair Meredith NumBits = TI.getCharWidth(); 2862a1c363f38e59a5044fc349aa7e538a50954c244Eli Friedman 2875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Set the width. 2885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer llvm::APSInt Val(NumBits); 2895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Set the value. 2905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Val = Literal.getValue(); 2915cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor // Set the signedness. UTF-16 and UTF-32 are always unsigned 2925cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor if (!Literal.isUTF16() && !Literal.isUTF32()) 2934e4d08403ca5cfd4d558fa2936215d3a4e5a528dDavid Blaikie Val.setIsUnsigned(!PP.getLangOpts().CharIsSigned); 2941eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2958ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner if (Result.Val.getBitWidth() > Val.getBitWidth()) { 2968ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner Result.Val = Val.extend(Result.Val.getBitWidth()); 2975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 2988ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner assert(Result.Val.getBitWidth() == Val.getBitWidth() && 2995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer "intmax_t smaller than char/wchar_t?"); 3008ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner Result.Val = Val; 3015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 3025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Consume the token. 3048ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner Result.setRange(PeekTok.getLocation()); 3055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.LexNonComment(PeekTok); 3065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 3075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 3088ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner case tok::l_paren: { 3098ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner SourceLocation Start = PeekTok.getLocation(); 3105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.LexNonComment(PeekTok); // Eat the (. 3115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Parse the value and if there are any binary operators involved, parse 3125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // them. 3135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (EvaluateValue(Result, PeekTok, DT, ValueLive, PP)) return true; 3145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If this is a silly value like (X), which doesn't need parens, check for 3165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // !(defined X). 31722f6bbcafa8871f4f20c4402d9cbc5c024fee99aChris Lattner if (PeekTok.is(tok::r_paren)) { 3185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Just use DT unmodified as our result. 3195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 3208ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner // Otherwise, we have something like (x+y), and we consumed '(x'. 3215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (EvaluateDirectiveSubExpr(Result, 1, PeekTok, ValueLive, PP)) 3225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return true; 3231eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 32422f6bbcafa8871f4f20c4402d9cbc5c024fee99aChris Lattner if (PeekTok.isNot(tok::r_paren)) { 325204b2fed909b1eabea7aeb6caadd7cff718edee5Chris Lattner PP.Diag(PeekTok.getLocation(), diag::err_pp_expected_rparen) 326204b2fed909b1eabea7aeb6caadd7cff718edee5Chris Lattner << Result.getRange(); 32728eb7e992b9a266abb300da25b6d3c1557cec361Chris Lattner PP.Diag(Start, diag::note_matching) << "("; 3285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return true; 3295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 3305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DT.State = DefinedTracker::Unknown; 3315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 3328ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner Result.setRange(Start, PeekTok.getLocation()); 3335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.LexNonComment(PeekTok); // Eat the ). 3345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 3358ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner } 3368ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner case tok::plus: { 3378ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner SourceLocation Start = PeekTok.getLocation(); 3385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Unary plus doesn't modify the value. 3395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.LexNonComment(PeekTok); 3408ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner if (EvaluateValue(Result, PeekTok, DT, ValueLive, PP)) return true; 3418ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner Result.setBegin(Start); 3428ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner return false; 3438ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner } 3445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::minus: { 3455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SourceLocation Loc = PeekTok.getLocation(); 3465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.LexNonComment(PeekTok); 3475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (EvaluateValue(Result, PeekTok, DT, ValueLive, PP)) return true; 3488ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner Result.setBegin(Loc); 3491eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.5.3.3p3: The sign of the result matches the sign of the operand. 3518ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner Result.Val = -Result.Val; 3521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 353b081a350b5cad21e5cbea74c618701e8b839c4f6Chris Lattner // -MININT is the only thing that overflows. Unsigned never overflows. 354b081a350b5cad21e5cbea74c618701e8b839c4f6Chris Lattner bool Overflow = !Result.isUnsigned() && Result.Val.isMinSignedValue(); 3551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If this operator is live and overflowed, report the issue. 3575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (Overflow && ValueLive) 358204b2fed909b1eabea7aeb6caadd7cff718edee5Chris Lattner PP.Diag(Loc, diag::warn_pp_expr_overflow) << Result.getRange(); 3591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DT.State = DefinedTracker::Unknown; 3615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 3625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 3631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3648ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner case tok::tilde: { 3658ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner SourceLocation Start = PeekTok.getLocation(); 3665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.LexNonComment(PeekTok); 3675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (EvaluateValue(Result, PeekTok, DT, ValueLive, PP)) return true; 3688ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner Result.setBegin(Start); 3698ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner 3705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.5.3.3p4: The sign of the result matches the sign of the operand. 3718ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner Result.Val = ~Result.Val; 3725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DT.State = DefinedTracker::Unknown; 3735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 3748ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner } 3751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3768ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner case tok::exclaim: { 3778ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner SourceLocation Start = PeekTok.getLocation(); 3785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.LexNonComment(PeekTok); 3795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (EvaluateValue(Result, PeekTok, DT, ValueLive, PP)) return true; 3808ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner Result.setBegin(Start); 3818ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner Result.Val = !Result.Val; 3825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.5.3.3p5: The sign of the result is 'int', aka it is signed. 3838ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner Result.Val.setIsUnsigned(false); 3841eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (DT.State == DefinedTracker::DefinedMacro) 3865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DT.State = DefinedTracker::NotDefinedMacro; 3875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer else if (DT.State == DefinedTracker::NotDefinedMacro) 3885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DT.State = DefinedTracker::DefinedMacro; 3895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 3908ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner } 3911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // FIXME: Handle #assert 3935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 3945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 3955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// getPrecedence - Return the precedence of the specified binary operator 3995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// token. This returns: 4005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ~0 - Invalid token. 4019e66ba6d1c1c0e11b261e3b20ff02b999621021aChris Lattner/// 14 -> 3 - various operators. 40284021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne/// 0 - 'eod' or ')' 4035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerstatic unsigned getPrecedence(tok::TokenKind Kind) { 4045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (Kind) { 4055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer default: return ~0U; 4065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::percent: 4075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::slash: 4085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::star: return 14; 4095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::plus: 4105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::minus: return 13; 4115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::lessless: 4125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::greatergreater: return 12; 4135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::lessequal: 4145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::less: 4155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::greaterequal: 4165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::greater: return 11; 4175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::exclaimequal: 4185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::equalequal: return 10; 4195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::amp: return 9; 4205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::caret: return 8; 4215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::pipe: return 7; 4225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::ampamp: return 6; 4235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::pipepipe: return 5; 42498ed49f3709f48d6abe1bc8deb418d0af89b8014Chris Lattner case tok::question: return 4; 42598ed49f3709f48d6abe1bc8deb418d0af89b8014Chris Lattner case tok::comma: return 3; 4269189156429c06eea3f75cb01646e2afd78000f39Chris Lattner case tok::colon: return 2; 42784021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne case tok::r_paren: return 0;// Lowest priority, end of expr. 42884021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne case tok::eod: return 0;// Lowest priority, end of directive. 4295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 4305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 4315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// EvaluateDirectiveSubExpr - Evaluate the subexpression whose first token is 4348ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner/// PeekTok, and whose precedence is PeekPrec. This returns the result in LHS. 4355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 4365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// If ValueLive is false, then this value is being evaluated in a context where 4375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// the result is not used. As such, avoid diagnostics that relate to 4388ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner/// evaluation, such as division by zero warnings. 4398ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattnerstatic bool EvaluateDirectiveSubExpr(PPValue &LHS, unsigned MinPrec, 440d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner Token &PeekTok, bool ValueLive, 4415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Preprocessor &PP) { 4425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer unsigned PeekPrec = getPrecedence(PeekTok.getKind()); 4435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If this token isn't valid, report the error. 4445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (PeekPrec == ~0U) { 445204b2fed909b1eabea7aeb6caadd7cff718edee5Chris Lattner PP.Diag(PeekTok.getLocation(), diag::err_pp_expr_bad_token_binop) 446204b2fed909b1eabea7aeb6caadd7cff718edee5Chris Lattner << LHS.getRange(); 4475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return true; 4485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 4491eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer while (1) { 4515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If this token has a lower precedence than we are allowed to parse, return 4525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // it so that higher levels of the recursion can parse it. 4535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (PeekPrec < MinPrec) 4545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 4551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer tok::TokenKind Operator = PeekTok.getKind(); 4571eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If this is a short-circuiting operator, see if the RHS of the operator is 4591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // dead. Note that this cannot just clobber ValueLive. Consider 4605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // "0 && 1 ? 4 : 1 / 0", which is parsed as "(0 && 1) ? 4 : (1 / 0)". In 4615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // this example, the RHS of the && being dead does not make the rest of the 4625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // expr dead. 4635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool RHSIsLive; 4648ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner if (Operator == tok::ampamp && LHS.Val == 0) 4655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer RHSIsLive = false; // RHS of "0 && x" is dead. 4668ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner else if (Operator == tok::pipepipe && LHS.Val != 0) 4675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer RHSIsLive = false; // RHS of "1 || x" is dead. 4688ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner else if (Operator == tok::question && LHS.Val == 0) 4695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer RHSIsLive = false; // RHS (x) of "0 ? x : y" is dead. 4705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer else 4715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer RHSIsLive = ValueLive; 4725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4738ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner // Consume the operator, remembering the operator's location for reporting. 4748ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner SourceLocation OpLoc = PeekTok.getLocation(); 4755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.LexNonComment(PeekTok); 4765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4778ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner PPValue RHS(LHS.getBitWidth()); 4785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Parse the RHS of the operator. 4795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DefinedTracker DT; 4805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (EvaluateValue(RHS, PeekTok, DT, RHSIsLive, PP)) return true; 4815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Remember the precedence of this operator and get the precedence of the 4835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // operator immediately to the right of the RHS. 4845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer unsigned ThisPrec = PeekPrec; 4855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PeekPrec = getPrecedence(PeekTok.getKind()); 4865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If this token isn't valid, report the error. 4885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (PeekPrec == ~0U) { 489204b2fed909b1eabea7aeb6caadd7cff718edee5Chris Lattner PP.Diag(PeekTok.getLocation(), diag::err_pp_expr_bad_token_binop) 490204b2fed909b1eabea7aeb6caadd7cff718edee5Chris Lattner << RHS.getRange(); 4915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return true; 4925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 4931eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 49498ed49f3709f48d6abe1bc8deb418d0af89b8014Chris Lattner // Decide whether to include the next binop in this subexpression. For 49598ed49f3709f48d6abe1bc8deb418d0af89b8014Chris Lattner // example, when parsing x+y*z and looking at '*', we want to recursively 49644cbbb05f544c5ee171000b2abf905aa7dc5340dChris Lattner // handle y*z as a single subexpression. We do this because the precedence 49744cbbb05f544c5ee171000b2abf905aa7dc5340dChris Lattner // of * is higher than that of +. The only strange case we have to handle 49844cbbb05f544c5ee171000b2abf905aa7dc5340dChris Lattner // here is for the ?: operator, where the precedence is actually lower than 49944cbbb05f544c5ee171000b2abf905aa7dc5340dChris Lattner // the LHS of the '?'. The grammar rule is: 50098ed49f3709f48d6abe1bc8deb418d0af89b8014Chris Lattner // 50198ed49f3709f48d6abe1bc8deb418d0af89b8014Chris Lattner // conditional-expression ::= 50298ed49f3709f48d6abe1bc8deb418d0af89b8014Chris Lattner // logical-OR-expression ? expression : conditional-expression 50398ed49f3709f48d6abe1bc8deb418d0af89b8014Chris Lattner // where 'expression' is actually comma-expression. 50498ed49f3709f48d6abe1bc8deb418d0af89b8014Chris Lattner unsigned RHSPrec; 50598ed49f3709f48d6abe1bc8deb418d0af89b8014Chris Lattner if (Operator == tok::question) 50698ed49f3709f48d6abe1bc8deb418d0af89b8014Chris Lattner // The RHS of "?" should be maximally consumed as an expression. 50798ed49f3709f48d6abe1bc8deb418d0af89b8014Chris Lattner RHSPrec = getPrecedence(tok::comma); 50898ed49f3709f48d6abe1bc8deb418d0af89b8014Chris Lattner else // All others should munch while higher precedence. 50998ed49f3709f48d6abe1bc8deb418d0af89b8014Chris Lattner RHSPrec = ThisPrec+1; 5101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 51198ed49f3709f48d6abe1bc8deb418d0af89b8014Chris Lattner if (PeekPrec >= RHSPrec) { 51298ed49f3709f48d6abe1bc8deb418d0af89b8014Chris Lattner if (EvaluateDirectiveSubExpr(RHS, RHSPrec, PeekTok, RHSIsLive, PP)) 5135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return true; 5145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PeekPrec = getPrecedence(PeekTok.getKind()); 5155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 5165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(PeekPrec <= ThisPrec && "Recursion didn't work!"); 5171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Usual arithmetic conversions (C99 6.3.1.8p1): result is unsigned if 5191eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // either operand is unsigned. 5205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer llvm::APSInt Res(LHS.getBitWidth()); 521019ef7e1024562f9647d80ded7be8b8c1d23678aChris Lattner switch (Operator) { 522019ef7e1024562f9647d80ded7be8b8c1d23678aChris Lattner case tok::question: // No UAC for x and y in "x ? y : z". 523019ef7e1024562f9647d80ded7be8b8c1d23678aChris Lattner case tok::lessless: // Shift amount doesn't UAC with shift value. 524019ef7e1024562f9647d80ded7be8b8c1d23678aChris Lattner case tok::greatergreater: // Shift amount doesn't UAC with shift value. 525019ef7e1024562f9647d80ded7be8b8c1d23678aChris Lattner case tok::comma: // Comma operands are not subject to UACs. 526019ef7e1024562f9647d80ded7be8b8c1d23678aChris Lattner case tok::pipepipe: // Logical || does not do UACs. 527019ef7e1024562f9647d80ded7be8b8c1d23678aChris Lattner case tok::ampamp: // Logical && does not do UACs. 528019ef7e1024562f9647d80ded7be8b8c1d23678aChris Lattner break; // No UAC 529019ef7e1024562f9647d80ded7be8b8c1d23678aChris Lattner default: 5305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Res.setIsUnsigned(LHS.isUnsigned()|RHS.isUnsigned()); 5315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If this just promoted something from signed to unsigned, and if the 5325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // value was negative, warn about it. 5335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (ValueLive && Res.isUnsigned()) { 5348ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner if (!LHS.isUnsigned() && LHS.Val.isNegative()) 535204b2fed909b1eabea7aeb6caadd7cff718edee5Chris Lattner PP.Diag(OpLoc, diag::warn_pp_convert_lhs_to_positive) 536204b2fed909b1eabea7aeb6caadd7cff718edee5Chris Lattner << LHS.Val.toString(10, true) + " to " + 537204b2fed909b1eabea7aeb6caadd7cff718edee5Chris Lattner LHS.Val.toString(10, false) 538204b2fed909b1eabea7aeb6caadd7cff718edee5Chris Lattner << LHS.getRange() << RHS.getRange(); 5398ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner if (!RHS.isUnsigned() && RHS.Val.isNegative()) 540204b2fed909b1eabea7aeb6caadd7cff718edee5Chris Lattner PP.Diag(OpLoc, diag::warn_pp_convert_rhs_to_positive) 541204b2fed909b1eabea7aeb6caadd7cff718edee5Chris Lattner << RHS.Val.toString(10, true) + " to " + 542204b2fed909b1eabea7aeb6caadd7cff718edee5Chris Lattner RHS.Val.toString(10, false) 543204b2fed909b1eabea7aeb6caadd7cff718edee5Chris Lattner << LHS.getRange() << RHS.getRange(); 5445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 5458ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner LHS.Val.setIsUnsigned(Res.isUnsigned()); 5468ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner RHS.Val.setIsUnsigned(Res.isUnsigned()); 5475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 5481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool Overflow = false; 5505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (Operator) { 551b219cfc4d75f0a03630b7c4509ef791b7e97b2c8David Blaikie default: llvm_unreachable("Unknown operator token!"); 5525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::percent: 5538ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner if (RHS.Val != 0) 5548ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner Res = LHS.Val % RHS.Val; 5558ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner else if (ValueLive) { 556204b2fed909b1eabea7aeb6caadd7cff718edee5Chris Lattner PP.Diag(OpLoc, diag::err_pp_remainder_by_zero) 557204b2fed909b1eabea7aeb6caadd7cff718edee5Chris Lattner << LHS.getRange() << RHS.getRange(); 5588ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner return true; 5595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 5605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 5615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::slash: 5628ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner if (RHS.Val != 0) { 563f9e7734edef861597473f31e85f6b46347348c3bChris Lattner if (LHS.Val.isSigned()) 564f9e7734edef861597473f31e85f6b46347348c3bChris Lattner Res = llvm::APSInt(LHS.Val.sdiv_ov(RHS.Val, Overflow), false); 565f9e7734edef861597473f31e85f6b46347348c3bChris Lattner else 566f9e7734edef861597473f31e85f6b46347348c3bChris Lattner Res = LHS.Val / RHS.Val; 5678ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner } else if (ValueLive) { 568204b2fed909b1eabea7aeb6caadd7cff718edee5Chris Lattner PP.Diag(OpLoc, diag::err_pp_division_by_zero) 569204b2fed909b1eabea7aeb6caadd7cff718edee5Chris Lattner << LHS.getRange() << RHS.getRange(); 5708ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner return true; 5715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 5725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 5731eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::star: 575f9e7734edef861597473f31e85f6b46347348c3bChris Lattner if (Res.isSigned()) 576f9e7734edef861597473f31e85f6b46347348c3bChris Lattner Res = llvm::APSInt(LHS.Val.smul_ov(RHS.Val, Overflow), false); 577f9e7734edef861597473f31e85f6b46347348c3bChris Lattner else 578f9e7734edef861597473f31e85f6b46347348c3bChris Lattner Res = LHS.Val * RHS.Val; 5795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 5805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::lessless: { 5815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Determine whether overflow is about to happen. 5828ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner unsigned ShAmt = static_cast<unsigned>(RHS.Val.getLimitedValue()); 583f9e7734edef861597473f31e85f6b46347348c3bChris Lattner if (LHS.isUnsigned()) { 584f9e7734edef861597473f31e85f6b46347348c3bChris Lattner Overflow = ShAmt >= LHS.Val.getBitWidth(); 585f9e7734edef861597473f31e85f6b46347348c3bChris Lattner if (Overflow) 586f9e7734edef861597473f31e85f6b46347348c3bChris Lattner ShAmt = LHS.Val.getBitWidth()-1; 587f9e7734edef861597473f31e85f6b46347348c3bChris Lattner Res = LHS.Val << ShAmt; 588f9e7734edef861597473f31e85f6b46347348c3bChris Lattner } else { 589f9e7734edef861597473f31e85f6b46347348c3bChris Lattner Res = llvm::APSInt(LHS.Val.sshl_ov(ShAmt, Overflow), false); 590f9e7734edef861597473f31e85f6b46347348c3bChris Lattner } 5915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 5925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 5935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::greatergreater: { 5945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Determine whether overflow is about to happen. 5958ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner unsigned ShAmt = static_cast<unsigned>(RHS.Val.getLimitedValue()); 5965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (ShAmt >= LHS.getBitWidth()) 5975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Overflow = true, ShAmt = LHS.getBitWidth()-1; 5988ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner Res = LHS.Val >> ShAmt; 5995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 6005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::plus: 6025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (LHS.isUnsigned()) 603f9e7734edef861597473f31e85f6b46347348c3bChris Lattner Res = LHS.Val + RHS.Val; 604f9e7734edef861597473f31e85f6b46347348c3bChris Lattner else 605f9e7734edef861597473f31e85f6b46347348c3bChris Lattner Res = llvm::APSInt(LHS.Val.sadd_ov(RHS.Val, Overflow), false); 6065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 6075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::minus: 6085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (LHS.isUnsigned()) 609f9e7734edef861597473f31e85f6b46347348c3bChris Lattner Res = LHS.Val - RHS.Val; 610f9e7734edef861597473f31e85f6b46347348c3bChris Lattner else 611f9e7734edef861597473f31e85f6b46347348c3bChris Lattner Res = llvm::APSInt(LHS.Val.ssub_ov(RHS.Val, Overflow), false); 6125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 6135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::lessequal: 6148ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner Res = LHS.Val <= RHS.Val; 6155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Res.setIsUnsigned(false); // C99 6.5.8p6, result is always int (signed) 6165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 6175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::less: 6188ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner Res = LHS.Val < RHS.Val; 6195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Res.setIsUnsigned(false); // C99 6.5.8p6, result is always int (signed) 6205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 6215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::greaterequal: 6228ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner Res = LHS.Val >= RHS.Val; 6235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Res.setIsUnsigned(false); // C99 6.5.8p6, result is always int (signed) 6245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 6255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::greater: 6268ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner Res = LHS.Val > RHS.Val; 6275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Res.setIsUnsigned(false); // C99 6.5.8p6, result is always int (signed) 6285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 6295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::exclaimequal: 6308ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner Res = LHS.Val != RHS.Val; 6315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Res.setIsUnsigned(false); // C99 6.5.9p3, result is always int (signed) 6325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 6335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::equalequal: 6348ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner Res = LHS.Val == RHS.Val; 6355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Res.setIsUnsigned(false); // C99 6.5.9p3, result is always int (signed) 6365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 6375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::amp: 6388ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner Res = LHS.Val & RHS.Val; 6395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 6405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::caret: 6418ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner Res = LHS.Val ^ RHS.Val; 6425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 6435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::pipe: 6448ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner Res = LHS.Val | RHS.Val; 6455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 6465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::ampamp: 6478ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner Res = (LHS.Val != 0 && RHS.Val != 0); 6485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Res.setIsUnsigned(false); // C99 6.5.13p3, result is always int (signed) 6495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 6505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::pipepipe: 6518ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner Res = (LHS.Val != 0 || RHS.Val != 0); 6525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Res.setIsUnsigned(false); // C99 6.5.14p3, result is always int (signed) 6535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 6545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::comma: 6559189156429c06eea3f75cb01646e2afd78000f39Chris Lattner // Comma is invalid in pp expressions in c89/c++ mode, but is valid in C99 6569189156429c06eea3f75cb01646e2afd78000f39Chris Lattner // if not being evaluated. 6574e4d08403ca5cfd4d558fa2936215d3a4e5a528dDavid Blaikie if (!PP.getLangOpts().C99 || ValueLive) 658204b2fed909b1eabea7aeb6caadd7cff718edee5Chris Lattner PP.Diag(OpLoc, diag::ext_pp_comma_expr) 659204b2fed909b1eabea7aeb6caadd7cff718edee5Chris Lattner << LHS.getRange() << RHS.getRange(); 6608ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner Res = RHS.Val; // LHS = LHS,RHS -> RHS. 6611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump break; 6625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::question: { 6635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Parse the : part of the expression. 66422f6bbcafa8871f4f20c4402d9cbc5c024fee99aChris Lattner if (PeekTok.isNot(tok::colon)) { 665204b2fed909b1eabea7aeb6caadd7cff718edee5Chris Lattner PP.Diag(PeekTok.getLocation(), diag::err_expected_colon) 666204b2fed909b1eabea7aeb6caadd7cff718edee5Chris Lattner << LHS.getRange(), RHS.getRange(); 66728eb7e992b9a266abb300da25b6d3c1557cec361Chris Lattner PP.Diag(OpLoc, diag::note_matching) << "?"; 6685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return true; 6695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Consume the :. 6715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.LexNonComment(PeekTok); 6725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Evaluate the value after the :. 6748ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner bool AfterColonLive = ValueLive && LHS.Val == 0; 6758ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner PPValue AfterColonVal(LHS.getBitWidth()); 6765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DefinedTracker DT; 6775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (EvaluateValue(AfterColonVal, PeekTok, DT, AfterColonLive, PP)) 6785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return true; 6795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 68044cbbb05f544c5ee171000b2abf905aa7dc5340dChris Lattner // Parse anything after the : with the same precedence as ?. We allow 68144cbbb05f544c5ee171000b2abf905aa7dc5340dChris Lattner // things of equal precedence because ?: is right associative. 68298ed49f3709f48d6abe1bc8deb418d0af89b8014Chris Lattner if (EvaluateDirectiveSubExpr(AfterColonVal, ThisPrec, 6835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PeekTok, AfterColonLive, PP)) 6845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return true; 6851eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Now that we have the condition, the LHS and the RHS of the :, evaluate. 6878ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner Res = LHS.Val != 0 ? RHS.Val : AfterColonVal.Val; 6888ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner RHS.setEnd(AfterColonVal.getRange().getEnd()); 6895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Usual arithmetic conversions (C99 6.3.1.8p1): result is unsigned if 6915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // either operand is unsigned. 6925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Res.setIsUnsigned(RHS.isUnsigned() | AfterColonVal.isUnsigned()); 6931eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Figure out the precedence of the token after the : part. 6955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PeekPrec = getPrecedence(PeekTok.getKind()); 6965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 6975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::colon: 6995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Don't allow :'s to float around without being part of ?: exprs. 700204b2fed909b1eabea7aeb6caadd7cff718edee5Chris Lattner PP.Diag(OpLoc, diag::err_pp_colon_without_question) 701204b2fed909b1eabea7aeb6caadd7cff718edee5Chris Lattner << LHS.getRange() << RHS.getRange(); 7025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return true; 7035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 7045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If this operator is live and overflowed, report the issue. 7065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (Overflow && ValueLive) 707204b2fed909b1eabea7aeb6caadd7cff718edee5Chris Lattner PP.Diag(OpLoc, diag::warn_pp_expr_overflow) 708204b2fed909b1eabea7aeb6caadd7cff718edee5Chris Lattner << LHS.getRange() << RHS.getRange(); 7091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Put the result back into 'LHS' for our next iteration. 7118ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner LHS.Val = Res; 7128ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner LHS.setEnd(RHS.getRange().getEnd()); 7135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 7145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 7155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// EvaluateDirectiveExpression - Evaluate an integer constant expression that 7175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// may occur after a #if or #elif directive. If the expression is equivalent 7185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// to "!defined(X)" return X in IfNDefMacro. 7195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerbool Preprocessor:: 7205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerEvaluateDirectiveExpression(IdentifierInfo *&IfNDefMacro) { 721a3e008abc51933d567303a1b4bd17e68c798f60eChris Lattner // Save the current state of 'DisableMacroExpansion' and reset it to false. If 722a3e008abc51933d567303a1b4bd17e68c798f60eChris Lattner // 'DisableMacroExpansion' is true, then we must be in a macro argument list 723a3e008abc51933d567303a1b4bd17e68c798f60eChris Lattner // in which case a directive is undefined behavior. We want macros to be able 724a3e008abc51933d567303a1b4bd17e68c798f60eChris Lattner // to recursively expand in order to get more gcc-list behavior, so we force 725a3e008abc51933d567303a1b4bd17e68c798f60eChris Lattner // DisableMacroExpansion to false and restore it when we're done parsing the 726a3e008abc51933d567303a1b4bd17e68c798f60eChris Lattner // expression. 727a3e008abc51933d567303a1b4bd17e68c798f60eChris Lattner bool DisableMacroExpansionAtStartOfDirective = DisableMacroExpansion; 728a3e008abc51933d567303a1b4bd17e68c798f60eChris Lattner DisableMacroExpansion = false; 729a3e008abc51933d567303a1b4bd17e68c798f60eChris Lattner 7305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Peek ahead one token. 731d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner Token Tok; 73288710f22be1acb04b7d812aebe87bea56394c07cEli Friedman LexNonComment(Tok); 7331fbb447e9d43c2c676e94081fbfee7eb6cbe933bDouglas Gregor 7345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.10.1p3 - All expressions are evaluated as intmax_t or uintmax_t. 73598be4943e8dc4f3905629a7102668960873cf863Chris Lattner unsigned BitWidth = getTargetInfo().getIntMaxTWidth(); 7361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7378ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner PPValue ResVal(BitWidth); 7385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DefinedTracker DT; 7395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (EvaluateValue(ResVal, Tok, DT, true, *this)) { 7405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Parse error, skip the rest of the macro line. 74184021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne if (Tok.isNot(tok::eod)) 7425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DiscardUntilEndOfDirective(); 743a3e008abc51933d567303a1b4bd17e68c798f60eChris Lattner 744a3e008abc51933d567303a1b4bd17e68c798f60eChris Lattner // Restore 'DisableMacroExpansion'. 745a3e008abc51933d567303a1b4bd17e68c798f60eChris Lattner DisableMacroExpansion = DisableMacroExpansionAtStartOfDirective; 7465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 7475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 7481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If we are at the end of the expression after just parsing a value, there 7505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // must be no (unparenthesized) binary operators involved, so we can exit 7515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // directly. 75284021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne if (Tok.is(tok::eod)) { 7535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If the expression we parsed was of the form !defined(macro), return the 7545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // macro in IfNDefMacro. 7555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (DT.State == DefinedTracker::NotDefinedMacro) 7565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer IfNDefMacro = DT.TheMacro; 7571eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 758a3e008abc51933d567303a1b4bd17e68c798f60eChris Lattner // Restore 'DisableMacroExpansion'. 759a3e008abc51933d567303a1b4bd17e68c798f60eChris Lattner DisableMacroExpansion = DisableMacroExpansionAtStartOfDirective; 7608ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner return ResVal.Val != 0; 7615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 7621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Otherwise, we must have a binary operator (e.g. "#if 1 < 2"), so parse the 7645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // operator and the stuff after it. 76598ed49f3709f48d6abe1bc8deb418d0af89b8014Chris Lattner if (EvaluateDirectiveSubExpr(ResVal, getPrecedence(tok::question), 76698ed49f3709f48d6abe1bc8deb418d0af89b8014Chris Lattner Tok, true, *this)) { 7675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Parse error, skip the rest of the macro line. 76884021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne if (Tok.isNot(tok::eod)) 7695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DiscardUntilEndOfDirective(); 770a3e008abc51933d567303a1b4bd17e68c798f60eChris Lattner 771a3e008abc51933d567303a1b4bd17e68c798f60eChris Lattner // Restore 'DisableMacroExpansion'. 772a3e008abc51933d567303a1b4bd17e68c798f60eChris Lattner DisableMacroExpansion = DisableMacroExpansionAtStartOfDirective; 7735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 7745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 7751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 77684021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // If we aren't at the tok::eod token, something bad happened, like an extra 7775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // ')' token. 77884021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne if (Tok.isNot(tok::eod)) { 7795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::err_pp_expected_eol); 7805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DiscardUntilEndOfDirective(); 7815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 7821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 783a3e008abc51933d567303a1b4bd17e68c798f60eChris Lattner // Restore 'DisableMacroExpansion'. 784a3e008abc51933d567303a1b4bd17e68c798f60eChris Lattner DisableMacroExpansion = DisableMacroExpansionAtStartOfDirective; 7858ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner return ResVal.Val != 0; 7865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 787