diff options
| author | Eli Bendersky <eliben@chromium.org> | 2013-07-15 16:09:15 -0700 |
|---|---|---|
| committer | Eli Bendersky <eliben@chromium.org> | 2013-07-15 16:09:15 -0700 |
| commit | c6cf05cb5108f356dde97c01ee4188b0671d4542 (patch) | |
| tree | 436fdc2a55296d3c202e7ef11f31be3be53efb5f /lib/Analysis/ValueTracking.cpp | |
| parent | c75199c649c739aade160289d93f257edc798cde (diff) | |
| parent | 7dfcb84fc16b3bf6b2379713b53090757f0a45f9 (diff) | |
Merge commit '7dfcb84fc16b3bf6b2379713b53090757f0a45f9'
Conflicts:
docs/LangRef.rst
include/llvm/CodeGen/CallingConvLower.h
include/llvm/IRReader/IRReader.h
include/llvm/Target/TargetMachine.h
lib/CodeGen/CallingConvLower.cpp
lib/IRReader/IRReader.cpp
lib/IRReader/LLVMBuild.txt
lib/IRReader/Makefile
lib/LLVMBuild.txt
lib/Makefile
lib/Support/MemoryBuffer.cpp
lib/Support/Unix/PathV2.inc
lib/Target/ARM/ARMBaseInstrInfo.cpp
lib/Target/ARM/ARMISelLowering.cpp
lib/Target/ARM/ARMInstrInfo.td
lib/Target/ARM/ARMSubtarget.cpp
lib/Target/ARM/ARMTargetMachine.cpp
lib/Target/Mips/CMakeLists.txt
lib/Target/Mips/MipsDelaySlotFiller.cpp
lib/Target/Mips/MipsISelLowering.cpp
lib/Target/Mips/MipsInstrInfo.td
lib/Target/Mips/MipsSubtarget.cpp
lib/Target/Mips/MipsSubtarget.h
lib/Target/X86/X86FastISel.cpp
lib/Target/X86/X86ISelDAGToDAG.cpp
lib/Target/X86/X86ISelLowering.cpp
lib/Target/X86/X86InstrControl.td
lib/Target/X86/X86InstrFormats.td
lib/Transforms/IPO/ExtractGV.cpp
lib/Transforms/InstCombine/InstCombineCompares.cpp
lib/Transforms/Utils/SimplifyLibCalls.cpp
test/CodeGen/X86/fast-isel-divrem.ll
test/MC/ARM/data-in-code.ll
tools/Makefile
tools/llvm-extract/llvm-extract.cpp
tools/llvm-link/CMakeLists.txt
tools/opt/CMakeLists.txt
tools/opt/LLVMBuild.txt
tools/opt/Makefile
tools/opt/opt.cpp
Diffstat (limited to 'lib/Analysis/ValueTracking.cpp')
| -rw-r--r-- | lib/Analysis/ValueTracking.cpp | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/lib/Analysis/ValueTracking.cpp b/lib/Analysis/ValueTracking.cpp index 8e3994e8f5..45dcc5e37e 100644 --- a/lib/Analysis/ValueTracking.cpp +++ b/lib/Analysis/ValueTracking.cpp @@ -953,6 +953,8 @@ bool llvm::isKnownNonZero(Value *V, const DataLayout *TD, unsigned Depth) { // Check for pointer simplifications. if (V->getType()->isPointerTy()) { + if (isKnownNonNull(V)) + return true; if (GEPOperator *GEP = dyn_cast<GEPOperator>(V)) if (isGEPKnownNonNull(GEP, TD, Depth)) return true; @@ -1396,10 +1398,10 @@ bool llvm::CannotBeNegativeZero(const Value *V, unsigned Depth) { return true; // (add x, 0.0) is guaranteed to return +0.0, not -0.0. - if (I->getOpcode() == Instruction::FAdd && - isa<ConstantFP>(I->getOperand(1)) && - cast<ConstantFP>(I->getOperand(1))->isNullValue()) - return true; + if (I->getOpcode() == Instruction::FAdd) + if (ConstantFP *CFP = dyn_cast<ConstantFP>(I->getOperand(1))) + if (CFP->isNullValue()) + return true; // sitofp and uitofp turn into +0.0 for zero. if (isa<SIToFPInst>(I) || isa<UIToFPInst>(I)) |