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| author | Evan Cheng <evan.cheng@apple.com> | 2010-07-08 06:01:49 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2010-07-08 06:01:49 +0000 |
| commit | 4ff7ab612c66fb7ecf547242d6906be6ec3fa604 (patch) | |
| tree | 08dd48c251c6f1df9626f77589187eefbb0c1b08 | |
| parent | 3651d92d91062ea4b1ee8b2a88eca03bd39e1968 (diff) | |
r107852 is only safe with -enable-unsafe-fp-math to account for +0.0 == -0.0.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107856 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/Target/ARM/ARMISelLowering.cpp | 8 | ||||
| -rw-r--r-- | test/CodeGen/ARM/fpcmp-opt.ll | 2 |
2 files changed, 6 insertions, 4 deletions
diff --git a/lib/Target/ARM/ARMISelLowering.cpp b/lib/Target/ARM/ARMISelLowering.cpp index e3db583298..8ca69cd612 100644 --- a/lib/Target/ARM/ARMISelLowering.cpp +++ b/lib/Target/ARM/ARMISelLowering.cpp @@ -2295,11 +2295,13 @@ SDValue ARMTargetLowering::getVFPCmp(SDValue &LHS, SDValue &RHS, ISD::CondCode CC, SDValue &ARMCC, SelectionDAG &DAG, DebugLoc dl) const { - if ((CC == ISD::SETEQ || CC == ISD::SETOEQ || + if (UnsafeFPMath && + (CC == ISD::SETEQ || CC == ISD::SETOEQ || CC == ISD::SETNE || CC == ISD::SETUNE) && canBitcastToInt(LHS.getNode()) && canBitcastToInt(RHS.getNode())) { - // If there are no othter uses of the CMP operands, and the condition - // code is EQ oe NE, we can optimize it to an integer comparison. + // If unsafe fp math optimization is enabled and there are no othter uses of + // the CMP operands, and the condition code is EQ oe NE, we can optimize it + // to an integer comparison. if (CC == ISD::SETOEQ) CC = ISD::SETEQ; else if (CC == ISD::SETUNE) diff --git a/test/CodeGen/ARM/fpcmp-opt.ll b/test/CodeGen/ARM/fpcmp-opt.ll index ed515cc1e7..f651c167cc 100644 --- a/test/CodeGen/ARM/fpcmp-opt.ll +++ b/test/CodeGen/ARM/fpcmp-opt.ll @@ -1,4 +1,4 @@ -; RUN: llc < %s -march=arm -mattr=+vfp2 | FileCheck %s +; RUN: llc < %s -march=arm -mattr=+vfp2 -enable-unsafe-fp-math | FileCheck %s ; rdar://7461510 define arm_apcscc i32 @t1(float* %a, float* %b) nounwind { |