diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Target/X86/X86ISelLowering.cpp | 30 |
1 files changed, 19 insertions, 11 deletions
diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp index 7648ddc6..86ad262 100644 --- a/lib/Target/X86/X86ISelLowering.cpp +++ b/lib/Target/X86/X86ISelLowering.cpp @@ -19182,6 +19182,22 @@ namespace { const VariadicFunction1<bool, StringRef, StringRef, matchAsmImpl> matchAsm={}; } +static bool clobbersFlagRegisters(const SmallVector<StringRef, 4> &AsmPieces) { + + if (AsmPieces.size() == 3 || AsmPieces.size() == 4) { + if (std::count(AsmPieces.begin(), AsmPieces.end(), "~{cc}") && + std::count(AsmPieces.begin(), AsmPieces.end(), "~{flags}") && + std::count(AsmPieces.begin(), AsmPieces.end(), "~{fpsr}")) { + + if (AsmPieces.size() == 3) + return true; + else if (std::count(AsmPieces.begin(), AsmPieces.end(), "~{dirflag}")) + return true; + } + } + return false; +} + bool X86TargetLowering::ExpandInlineAsm(CallInst *CI) const { InlineAsm *IA = cast<InlineAsm>(CI->getCalledValue()); @@ -19223,12 +19239,8 @@ bool X86TargetLowering::ExpandInlineAsm(CallInst *CI) const { const std::string &ConstraintsStr = IA->getConstraintString(); SplitString(StringRef(ConstraintsStr).substr(5), AsmPieces, ","); array_pod_sort(AsmPieces.begin(), AsmPieces.end()); - if (AsmPieces.size() == 4 && - AsmPieces[0] == "~{cc}" && - AsmPieces[1] == "~{dirflag}" && - AsmPieces[2] == "~{flags}" && - AsmPieces[3] == "~{fpsr}") - return IntrinsicLowering::LowerToByteSwap(CI); + if (clobbersFlagRegisters(AsmPieces)) + return IntrinsicLowering::LowerToByteSwap(CI); } break; case 3: @@ -19241,11 +19253,7 @@ bool X86TargetLowering::ExpandInlineAsm(CallInst *CI) const { const std::string &ConstraintsStr = IA->getConstraintString(); SplitString(StringRef(ConstraintsStr).substr(5), AsmPieces, ","); array_pod_sort(AsmPieces.begin(), AsmPieces.end()); - if (AsmPieces.size() == 4 && - AsmPieces[0] == "~{cc}" && - AsmPieces[1] == "~{dirflag}" && - AsmPieces[2] == "~{flags}" && - AsmPieces[3] == "~{fpsr}") + if (clobbersFlagRegisters(AsmPieces)) return IntrinsicLowering::LowerToByteSwap(CI); } |