diff options
| author | Chris Lattner <sabre@nondot.org> | 2008-01-25 06:14:17 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2008-01-25 06:14:17 +0000 |
| commit | f4523c35cb2d770d87652b8dcf15e69de1e702d0 (patch) | |
| tree | 1f5577a59514230f545912411b7ce55dd4c64a54 /llvm/lib | |
| parent | 84ab724e060d55556e2be90d7eb5a7f87c2d6e91 (diff) | |
| download | bcm5719-llvm-f4523c35cb2d770d87652b8dcf15e69de1e702d0.tar.gz bcm5719-llvm-f4523c35cb2d770d87652b8dcf15e69de1e702d0.zip | |
optimize fxor like for
llvm-svn: 46345
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Target/X86/X86ISelLowering.cpp | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp index cef8e4b3e69..e4d4ceb99fa 100644 --- a/llvm/lib/Target/X86/X86ISelLowering.cpp +++ b/llvm/lib/Target/X86/X86ISelLowering.cpp @@ -5627,10 +5627,12 @@ static SDOperand PerformSELECTCombine(SDNode *N, SelectionDAG &DAG, return SDOperand(); } -/// PerformFORCombine - Do target-specific dag combines on X86ISD::FOR nodes. +/// PerformFORCombine - Do target-specific dag combines on X86ISD::FOR and +/// X86ISD::FXOR nodes. static SDOperand PerformFORCombine(SDNode *N, SelectionDAG &DAG) { - // FOR(0.0, x) -> x - // FOR(x, 0.0) -> x + assert(N->getOpcode() == X86ISD::FOR || N->getOpcode() == X86ISD::FXOR); + // F[X]OR(0.0, x) -> x + // F[X]OR(x, 0.0) -> x if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(N->getOperand(0))) if (C->getValueAPF().isPosZero()) return N->getOperand(1); @@ -5661,6 +5663,7 @@ SDOperand X86TargetLowering::PerformDAGCombine(SDNode *N, default: break; case ISD::VECTOR_SHUFFLE: return PerformShuffleCombine(N, DAG, Subtarget); case ISD::SELECT: return PerformSELECTCombine(N, DAG, Subtarget); + case X86ISD::FXOR: case X86ISD::FOR: return PerformFORCombine(N, DAG); case X86ISD::FAND: return PerformFANDCombine(N, DAG); } |
