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copyFastMathFlags utility and test case

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168943 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Michael Ilseman 2012-11-29 21:25:12 +00:00
parent e8832680f8
commit 4b896dd613
3 changed files with 18 additions and 0 deletions
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3
include/llvm/Instruction.h
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@ -227,6 +227,9 @@ public:
/// these flats. /// these flats.
FastMathFlags getFastMathFlags() const; FastMathFlags getFastMathFlags() const;
/// Copy I's fast-math flags
void copyFastMathFlags(const Instruction *I);
private: private:
/// hasMetadataHashEntry - Return true if we have an entry in the on-the-side /// hasMetadataHashEntry - Return true if we have an entry in the on-the-side
/// metadata hash. /// metadata hash.

6
lib/VMCore/Instruction.cpp
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@ -177,6 +177,12 @@ FastMathFlags Instruction::getFastMathFlags() const {
return cast<FPMathOperator>(this)->getFastMathFlags(); return cast<FPMathOperator>(this)->getFastMathFlags();
} }
/// Copy I's fast-math flags
void Instruction::copyFastMathFlags(const Instruction *I) {
setFastMathFlags(I->getFastMathFlags());
}
const char *Instruction::getOpcodeName(unsigned OpCode) { const char *Instruction::getOpcodeName(unsigned OpCode) {
switch (OpCode) { switch (OpCode) {
// Terminators // Terminators

9
unittests/VMCore/IRBuilderTest.cpp
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@ -164,6 +164,15 @@ TEST_F(IRBuilderTest, FastMathFlags) {
FDiv = cast<Instruction>(F); FDiv = cast<Instruction>(F);
EXPECT_TRUE(FDiv->hasAllowReciprocal()); EXPECT_TRUE(FDiv->hasAllowReciprocal());
Builder.clearFastMathFlags();
F = Builder.CreateFDiv(F, F);
ASSERT_TRUE(isa<Instruction>(F));
FDiv = cast<Instruction>(F);
EXPECT_FALSE(FDiv->getFastMathFlags().any());
FDiv->copyFastMathFlags(FAdd);
EXPECT_TRUE(FDiv->hasNoNaNs());
} }
} }