[llvm-commits] [llvm] r168943 - in /llvm/trunk: include/llvm/Instruction.h lib/VMCore/Instruction.cpp unittests/VMCore/IRBuilderTest.cpp

[Michael Ilseman]

Author: milseman
Date: Thu Nov 29 15:25:12 2012
New Revision: 168943

URL: http://llvm.org/viewvc/llvm-project?rev=168943&view=rev
Log:
copyFastMathFlags utility and test case

Modified:
    llvm/trunk/include/llvm/Instruction.h
    llvm/trunk/lib/VMCore/Instruction.cpp
    llvm/trunk/unittests/VMCore/IRBuilderTest.cpp

Modified: llvm/trunk/include/llvm/Instruction.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/Instruction.h?rev=168943&r1=168942&r2=168943&view=diff
==============================================================================
--- llvm/trunk/include/llvm/Instruction.h (original)
+++ llvm/trunk/include/llvm/Instruction.h Thu Nov 29 15:25:12 2012
@@ -227,6 +227,9 @@
   /// these flats.
   FastMathFlags getFastMathFlags() const;
 
+  /// Copy I's fast-math flags
+  void copyFastMathFlags(const Instruction *I);
+
 private:
   /// hasMetadataHashEntry - Return true if we have an entry in the on-the-side
   /// metadata hash.

Modified: llvm/trunk/lib/VMCore/Instruction.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/VMCore/Instruction.cpp?rev=168943&r1=168942&r2=168943&view=diff
==============================================================================
--- llvm/trunk/lib/VMCore/Instruction.cpp (original)
+++ llvm/trunk/lib/VMCore/Instruction.cpp Thu Nov 29 15:25:12 2012
@@ -177,6 +177,12 @@
   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) {
   switch (OpCode) {
   // Terminators

Modified: llvm/trunk/unittests/VMCore/IRBuilderTest.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/unittests/VMCore/IRBuilderTest.cpp?rev=168943&r1=168942&r2=168943&view=diff
==============================================================================
--- llvm/trunk/unittests/VMCore/IRBuilderTest.cpp (original)
+++ llvm/trunk/unittests/VMCore/IRBuilderTest.cpp Thu Nov 29 15:25:12 2012
@@ -164,6 +164,15 @@
   FDiv = cast<Instruction>(F);
   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());
+
 }
 
 }