TargetLibraryInfo.cpp revision 8ff4115ef0bcad0a46750bb2bd4376a61b346362 
1//===-- TargetLibraryInfo.cpp - Runtime library information ----------------==//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file implements the TargetLibraryInfo class.
11//
12//===----------------------------------------------------------------------===//
13
14#include "llvm/Target/TargetLibraryInfo.h"
15#include "llvm/ADT/Triple.h"
16using namespace llvm;
17
18// Register the default implementation.
19INITIALIZE_PASS(TargetLibraryInfo, "targetlibinfo",
20                "Target Library Information", false, true)
21char TargetLibraryInfo::ID = 0;
22
23const char* TargetLibraryInfo::StandardNames[LibFunc::NumLibFuncs] =
24  {
25    "acos",
26    "acosl",
27    "acosf",
28    "asin",
29    "asinl",
30    "asinf",
31    "atan",
32    "atanl",
33    "atanf",
34    "ceil",
35    "ceill",
36    "ceilf",
37    "cos",
38    "cosl",
39    "cosf",
40    "cosh",
41    "coshl",
42    "coshf",
43    "exp",
44    "expl",
45    "expf",
46    "exp2",
47    "exp2l",
48    "exp2f",
49    "expm1",
50    "expm1l",
51    "expl1f",
52    "fabs",
53    "fabsl",
54    "fabsf",
55    "floor",
56    "floorl",
57    "floorf",
58    "fiprintf",
59    "fputs",
60    "fwrite",
61    "iprintf",
62    "log",
63    "logl",
64    "logf",
65    "log2",
66    "log2l",
67    "log2f",
68    "log10",
69    "log10l",
70    "log10f",
71    "log1p",
72    "log1pl",
73    "log1pf",
74    "memcpy",
75    "memmove",
76    "memset",
77    "memset_pattern16",
78    "pow",
79    "powf",
80    "powl",
81    "siprintf",
82    "sqrt",
83    "sqrtl",
84    "sqrtf"
85  };
86
87/// initialize - Initialize the set of available library functions based on the
88/// specified target triple.  This should be carefully written so that a missing
89/// target triple gets a sane set of defaults.
90static void initialize(TargetLibraryInfo &TLI, const Triple &T) {
91  initializeTargetLibraryInfoPass(*PassRegistry::getPassRegistry());
92
93
94  // memset_pattern16 is only available on iOS 3.0 and Mac OS/X 10.5 and later.
95  if (T.isMacOSX()) {
96    if (T.isMacOSXVersionLT(10, 5))
97      TLI.setUnavailable(LibFunc::memset_pattern16);
98  } else if (T.getOS() == Triple::IOS) {
99    if (T.isOSVersionLT(3, 0))
100      TLI.setUnavailable(LibFunc::memset_pattern16);
101  } else {
102    TLI.setUnavailable(LibFunc::memset_pattern16);
103  }
104
105  if (T.isMacOSX() && T.getArch() == Triple::x86 &&
106      !T.isMacOSXVersionLT(10, 7)) {
107    // x86-32 OSX has a scheme where fwrite and fputs (and some other functions
108    // we don't care about) have two versions; on recent OSX, the one we want
109    // has a $UNIX2003 suffix. The two implementations are identical except
110    // for the return value in some edge cases.  However, we don't want to
111    // generate code that depends on the old symbols.
112    TLI.setAvailableWithName(LibFunc::fwrite, "fwrite$UNIX2003");
113    TLI.setAvailableWithName(LibFunc::fputs, "fputs$UNIX2003");
114  }
115
116  // iprintf and friends are only available on XCore and TCE.
117  if (T.getArch() != Triple::xcore && T.getArch() != Triple::tce) {
118    TLI.setUnavailable(LibFunc::iprintf);
119    TLI.setUnavailable(LibFunc::siprintf);
120    TLI.setUnavailable(LibFunc::fiprintf);
121  }
122}
123
124
125TargetLibraryInfo::TargetLibraryInfo() : ImmutablePass(ID) {
126  // Default to everything being available.
127  memset(AvailableArray, -1, sizeof(AvailableArray));
128
129  initialize(*this, Triple());
130}
131
132TargetLibraryInfo::TargetLibraryInfo(const Triple &T) : ImmutablePass(ID) {
133  // Default to everything being available.
134  memset(AvailableArray, -1, sizeof(AvailableArray));
135
136  initialize(*this, T);
137}
138
139TargetLibraryInfo::TargetLibraryInfo(const TargetLibraryInfo &TLI)
140  : ImmutablePass(ID) {
141  memcpy(AvailableArray, TLI.AvailableArray, sizeof(AvailableArray));
142  CustomNames = TLI.CustomNames;
143}
144
145
146/// disableAllFunctions - This disables all builtins, which is used for options
147/// like -fno-builtin.
148void TargetLibraryInfo::disableAllFunctions() {
149  memset(AvailableArray, 0, sizeof(AvailableArray));
150}
151