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//===- llvm/unittest/VMCore/Metadata.cpp - Metadata unit tests ------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "gtest/gtest.h"
#include "llvm/Constants.h"
#include "llvm/Instructions.h"
#include "llvm/MDNode.h"
#include "llvm/Type.h"
#include "llvm/Support/ValueHandle.h"
#include <sstream>
using namespace llvm;
namespace {
// Test that construction of MDString with different value produces different
// MDString objects, even with the same string pointer and nulls in the string.
TEST(MDStringTest, CreateDifferent) {
char x[3] = { 'f', 0, 'A' };
MDString *s1 = MDString::get(&x[0], &x[3]);
x[2] = 'B';
MDString *s2 = MDString::get(&x[0], &x[3]);
EXPECT_NE(s1, s2);
}
// Test that creation of MDStrings with the same string contents produces the
// same MDString object, even with different pointers.
TEST(MDStringTest, CreateSame) {
char x[4] = { 'a', 'b', 'c', 'X' };
char y[4] = { 'a', 'b', 'c', 'Y' };
MDString *s1 = MDString::get(&x[0], &x[3]);
MDString *s2 = MDString::get(&y[0], &y[3]);
EXPECT_EQ(s1, s2);
}
// Test that MDString prints out the string we fed it.
TEST(MDStringTest, PrintingSimple) {
char *str = new char[13];
strncpy(str, "testing 1 2 3", 13);
MDString *s = MDString::get(str, str+13);
strncpy(str, "aaaaaaaaaaaaa", 13);
delete[] str;
std::ostringstream oss;
s->print(oss);
EXPECT_STREQ("metadata !\"testing 1 2 3\"", oss.str().c_str());
}
// Test printing of MDString with non-printable characters.
TEST(MDStringTest, PrintingComplex) {
char str[5] = {0, '\n', '"', '\\', -1};
MDString *s = MDString::get(str+0, str+5);
std::ostringstream oss;
s->print(oss);
EXPECT_STREQ("metadata !\"\\00\\0A\\22\\5C\\FF\"", oss.str().c_str());
}
// Test the two constructors, and containing other Constants.
TEST(MDNodeTest, Simple) {
char x[3] = { 'a', 'b', 'c' };
char y[3] = { '1', '2', '3' };
MDString *s1 = MDString::get(&x[0], &x[3]);
MDString *s2 = MDString::get(&y[0], &y[3]);
ConstantInt *CI = ConstantInt::get(APInt(8, 0));
std::vector<Value *> V;
V.push_back(s1);
V.push_back(CI);
V.push_back(s2);
MDNode *n1 = MDNode::get(&V[0], 3);
Value *const c1 = n1;
MDNode *n2 = MDNode::get(&c1, 1);
MDNode *n3 = MDNode::get(&V[0], 3);
EXPECT_NE(n1, n2);
EXPECT_EQ(n1, n3);
EXPECT_EQ(3u, n1->getNumElements());
EXPECT_EQ(s1, n1->getElement(0));
EXPECT_EQ(CI, n1->getElement(1));
EXPECT_EQ(s2, n1->getElement(2));
EXPECT_EQ(1u, n2->getNumElements());
EXPECT_EQ(n1, n2->getElement(0));
std::ostringstream oss1, oss2;
n1->print(oss1);
n2->print(oss2);
EXPECT_STREQ("!0 = metadata !{metadata !\"abc\", i8 0, metadata !\"123\"}\n",
oss1.str().c_str());
EXPECT_STREQ("!0 = metadata !{metadata !1}\n"
"!1 = metadata !{metadata !\"abc\", i8 0, metadata !\"123\"}\n",
oss2.str().c_str());
}
TEST(MDNodeTest, RAUW) {
Constant *C = ConstantInt::get(Type::Int32Ty, 1);
Instruction *I = new BitCastInst(C, Type::Int32Ty);
Value *const V1 = I;
MDNode *n1 = MDNode::get(&V1, 1);
WeakVH wn1 = n1;
Value *const V2 = C;
MDNode *n2 = MDNode::get(&V2, 1);
WeakVH wn2 = n2;
EXPECT_NE(wn1, wn2);
I->replaceAllUsesWith(C);
EXPECT_EQ(wn1, wn2);
}
TEST(MDNodeTest, Delete) {
Constant *C = ConstantInt::get(Type::Int32Ty, 1);
Instruction *I = new BitCastInst(C, Type::Int32Ty);
Value *const V = I;
MDNode *n = MDNode::get(&V, 1);
WeakVH wvh = n;
EXPECT_EQ(n, wvh);
delete I;
std::ostringstream oss;
wvh->print(oss);
EXPECT_STREQ("!0 = metadata !{null}\n", oss.str().c_str());
}
}
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