MetadataTest.cpp revision cb33799b9f4e152e3460faa83e59b53ff604c87d
1//===- llvm/unittest/VMCore/Metadata.cpp - Metadata unit tests ------------===// 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#include "gtest/gtest.h" 11#include "llvm/Constants.h" 12#include "llvm/Instructions.h" 13#include "llvm/MDNode.h" 14#include "llvm/Type.h" 15#include "llvm/Support/ValueHandle.h" 16#include <sstream> 17 18using namespace llvm; 19 20namespace { 21 22// Test that construction of MDString with different value produces different 23// MDString objects, even with the same string pointer and nulls in the string. 24TEST(MDStringTest, CreateDifferent) { 25 char x[3] = { 'f', 0, 'A' }; 26 MDString *s1 = MDString::get(&x[0], &x[3]); 27 x[2] = 'B'; 28 MDString *s2 = MDString::get(&x[0], &x[3]); 29 EXPECT_NE(s1, s2); 30} 31 32// Test that creation of MDStrings with the same string contents produces the 33// same MDString object, even with different pointers. 34TEST(MDStringTest, CreateSame) { 35 char x[4] = { 'a', 'b', 'c', 'X' }; 36 char y[4] = { 'a', 'b', 'c', 'Y' }; 37 38 MDString *s1 = MDString::get(&x[0], &x[3]); 39 MDString *s2 = MDString::get(&y[0], &y[3]); 40 EXPECT_EQ(s1, s2); 41} 42 43// Test that MDString prints out the string we fed it. 44TEST(MDStringTest, PrintingSimple) { 45 char *str = new char[13]; 46 strncpy(str, "testing 1 2 3", 13); 47 MDString *s = MDString::get(str, str+13); 48 strncpy(str, "aaaaaaaaaaaaa", 13); 49 delete[] str; 50 51 std::ostringstream oss; 52 s->print(oss); 53 EXPECT_STREQ("{ } !\"testing 1 2 3\"", oss.str().c_str()); 54} 55 56// Test printing of MDString with non-printable characters. 57TEST(MDStringTest, PrintingComplex) { 58 char str[5] = {0, '\n', '"', '\\', -1}; 59 MDString *s = MDString::get(str+0, str+5); 60 std::ostringstream oss; 61 s->print(oss); 62 EXPECT_STREQ("{ } !\"\\00\\0A\\22\\5C\\FF\"", oss.str().c_str()); 63} 64 65// Test the two constructors, and containing other Constants. 66TEST(MDNodeTest, Simple) { 67 char x[3] = { 'a', 'b', 'c' }; 68 char y[3] = { '1', '2', '3' }; 69 70 MDString *s1 = MDString::get(&x[0], &x[3]); 71 MDString *s2 = MDString::get(&y[0], &y[3]); 72 ConstantInt *CI = ConstantInt::get(APInt(8, 0)); 73 74 std::vector<Value *> V; 75 V.push_back(s1); 76 V.push_back(CI); 77 V.push_back(s2); 78 79 MDNode *n1 = MDNode::get(&V[0], 3); 80 Value *const c1 = n1; 81 MDNode *n2 = MDNode::get(&c1, 1); 82 MDNode *n3 = MDNode::get(&V[0], 3); 83 EXPECT_NE(n1, n2); 84 EXPECT_EQ(n1, n3); 85 86 EXPECT_EQ(3u, n1->getNumElements()); 87 EXPECT_EQ(s1, n1->getElement(0)); 88 EXPECT_EQ(CI, n1->getElement(1)); 89 EXPECT_EQ(s2, n1->getElement(2)); 90 91 EXPECT_EQ(1u, n2->getNumElements()); 92 EXPECT_EQ(n1, n2->getElement(0)); 93 94 std::ostringstream oss1, oss2; 95 n1->print(oss1); 96 n2->print(oss2); 97 EXPECT_STREQ("{ } !{{ } !\"abc\", i8 0, { } !\"123\"}", oss1.str().c_str()); 98 EXPECT_STREQ("{ } !{{ } !{{ } !\"abc\", i8 0, { } !\"123\"}}", 99 oss2.str().c_str()); 100} 101 102TEST(MDNodeTest, RAUW) { 103 Constant *C = ConstantInt::get(Type::Int32Ty, 1); 104 Instruction *I = new BitCastInst(C, Type::Int32Ty); 105 106 Value *const V1 = I; 107 MDNode *n1 = MDNode::get(&V1, 1); 108 WeakVH wn1 = n1; 109 110 Value *const V2 = C; 111 MDNode *n2 = MDNode::get(&V2, 1); 112 WeakVH wn2 = n2; 113 114 EXPECT_NE(wn1, wn2); 115 116 I->replaceAllUsesWith(C); 117 118 EXPECT_EQ(wn1, wn2); 119} 120 121TEST(MDNodeTest, Delete) { 122 Constant *C = ConstantInt::get(Type::Int32Ty, 1); 123 Instruction *I = new BitCastInst(C, Type::Int32Ty); 124 125 Value *const V = I; 126 MDNode *n = MDNode::get(&V, 1); 127 WeakVH wvh = n; 128 129 EXPECT_EQ(n, wvh); 130 131 delete I; 132 133 std::ostringstream oss; 134 wvh->print(oss); 135 EXPECT_STREQ("{ } !{null}", oss.str().c_str()); 136} 137} 138