diff options
Diffstat (limited to 'lib/Target/X86/X86ISelLowering.cpp')
| -rw-r--r-- | lib/Target/X86/X86ISelLowering.cpp | 22 |
1 files changed, 18 insertions, 4 deletions
diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp index 8f7b668..26c9cd7 100644 --- a/lib/Target/X86/X86ISelLowering.cpp +++ b/lib/Target/X86/X86ISelLowering.cpp @@ -1909,7 +1909,6 @@ SDValue X86TargetLowering::getReturnAddressFrameIndex(SelectionDAG &DAG) { } - /// translateX86CC - do a one to one translation of a ISD::CondCode to the X86 /// specific condition code. It returns a false if it cannot do a direct /// translation. X86CC is the translated CondCode. LHS/RHS are modified as @@ -1936,7 +1935,10 @@ static bool translateX86CC(ISD::CondCode SetCCOpcode, bool isFP, return true; } } + } + bool Flip = false; + if (!isFP) { switch (SetCCOpcode) { default: break; case ISD::SETEQ: X86CC = X86::COND_E; break; @@ -1957,7 +1959,6 @@ static bool translateX86CC(ISD::CondCode SetCCOpcode, bool isFP, // 0 | 0 | 1 | X < Y // 1 | 0 | 0 | X == Y // 1 | 1 | 1 | unordered - bool Flip = false; switch (SetCCOpcode) { default: break; case ISD::SETUEQ: @@ -1979,11 +1980,24 @@ static bool translateX86CC(ISD::CondCode SetCCOpcode, bool isFP, case ISD::SETUO: X86CC = X86::COND_P; break; case ISD::SETO: X86CC = X86::COND_NP; break; } - if (Flip) + } + + if (X86CC == X86::COND_INVALID) + return false; + + if (Flip) + std::swap(LHS, RHS); + + if (isFP) { + bool LHSCanFold = ISD::isNON_EXTLoad(LHS.getNode()) && LHS.hasOneUse(); + bool RHSCanFold = ISD::isNON_EXTLoad(RHS.getNode()) && RHS.hasOneUse(); + if (LHSCanFold && !RHSCanFold) { + X86CC = X86::GetSwappedBranchCondition(static_cast<X86::CondCode>(X86CC)); std::swap(LHS, RHS); + } } - return X86CC != X86::COND_INVALID; + return true; } /// hasFPCMov - is there a floating point cmov for the specific X86 condition |