diff options
| -rw-r--r-- | llvm/lib/Target/X86/X86FloatingPoint.cpp | 37 |
1 files changed, 36 insertions, 1 deletions
diff --git a/llvm/lib/Target/X86/X86FloatingPoint.cpp b/llvm/lib/Target/X86/X86FloatingPoint.cpp index b5c6aa6b9c7..0e135f3a496 100644 --- a/llvm/lib/Target/X86/X86FloatingPoint.cpp +++ b/llvm/lib/Target/X86/X86FloatingPoint.cpp @@ -164,6 +164,8 @@ namespace { void handleCompareFP(MachineBasicBlock::iterator &I); void handleCondMovFP(MachineBasicBlock::iterator &I); void handleSpecialFP(MachineBasicBlock::iterator &I); + + bool translateCopy(MachineInstr*); }; char FPS::ID = 0; } @@ -237,7 +239,10 @@ bool FPS::processBasicBlock(MachineFunction &MF, MachineBasicBlock &BB) { unsigned FPInstClass = Flags & X86II::FPTypeMask; if (MI->isInlineAsm()) FPInstClass = X86II::SpecialFP; - + + if (MI->isCopy() && translateCopy(MI)) + FPInstClass = X86II::SpecialFP; + if (FPInstClass == X86II::NotFP) continue; // Efficiently ignore non-fp insts! @@ -1206,3 +1211,33 @@ void FPS::handleSpecialFP(MachineBasicBlock::iterator &I) { I = MBB->erase(I); // Remove the pseudo instruction --I; } + +// Translate a COPY instruction to a pseudo-op that handleSpecialFP understands. +bool FPS::translateCopy(MachineInstr *MI) { + unsigned DstReg = MI->getOperand(0).getReg(); + unsigned SrcReg = MI->getOperand(1).getReg(); + + if (DstReg == X86::ST0) { + MI->setDesc(TII->get(X86::FpSET_ST0_80)); + MI->RemoveOperand(0); + return true; + } + if (DstReg == X86::ST1) { + MI->setDesc(TII->get(X86::FpSET_ST1_80)); + MI->RemoveOperand(0); + return true; + } + if (SrcReg == X86::ST0) { + MI->setDesc(TII->get(X86::FpGET_ST0_80)); + return true; + } + if (SrcReg == X86::ST1) { + MI->setDesc(TII->get(X86::FpGET_ST1_80)); + return true; + } + if (X86::RFP80RegClass.contains(DstReg, SrcReg)) { + MI->setDesc(TII->get(X86::MOV_Fp8080)); + return true; + } + return false; +} |
