diff options
| -rw-r--r-- | lib/Target/X86/X86RegisterInfo.cpp | 30 |
1 files changed, 23 insertions, 7 deletions
diff --git a/lib/Target/X86/X86RegisterInfo.cpp b/lib/Target/X86/X86RegisterInfo.cpp index 4f4a33db74..e1699f6b5a 100644 --- a/lib/Target/X86/X86RegisterInfo.cpp +++ b/lib/Target/X86/X86RegisterInfo.cpp @@ -403,6 +403,9 @@ eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB, } } + // The EFLAGS implicit def is dead. + New->getOperand(3).setIsDead(); + // Replace the pseudo instruction with a new instruction... if (New) MBB.insert(I, New); } @@ -416,6 +419,9 @@ eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB, (Is64Bit ? X86::SUB64ri32 : X86::SUB32ri); MachineInstr *New = BuildMI(MF, TII.get(Opc), StackPtr).addReg(StackPtr).addImm(CalleeAmt); + // The EFLAGS implicit def is dead. + New->getOperand(3).setIsDead(); + MBB.insert(I, New); } } @@ -517,7 +523,10 @@ void emitSPUpdate(MachineBasicBlock &MBB, MachineBasicBlock::iterator &MBBI, while (Offset) { uint64_t ThisVal = (Offset > Chunk) ? Chunk : Offset; - BuildMI(MBB, MBBI, TII.get(Opc), StackPtr).addReg(StackPtr).addImm(ThisVal); + MachineInstr *MI = + BuildMI(MBB, MBBI, TII.get(Opc), StackPtr).addReg(StackPtr).addImm(ThisVal); + // The EFLAGS implicit def is dead. + MI->getOperand(3).setIsDead(); Offset -= ThisVal; } } @@ -713,8 +722,11 @@ void X86RegisterInfo::emitPrologue(MachineFunction &MF) const { // applies to tail call optimized functions where the callee argument stack // size is bigger than the callers. if (TailCallReturnAddrDelta < 0) { - BuildMI(MBB, MBBI, TII.get(Is64Bit? X86::SUB64ri32 : X86::SUB32ri), - StackPtr).addReg(StackPtr).addImm(-TailCallReturnAddrDelta); + MachineInstr *MI = + BuildMI(MBB, MBBI, TII.get(Is64Bit? X86::SUB64ri32 : X86::SUB32ri), + StackPtr).addReg(StackPtr).addImm(-TailCallReturnAddrDelta); + // The EFLAGS implicit def is dead. + MI->getOperand(3).setIsDead(); } uint64_t NumBytes = 0; @@ -751,10 +763,14 @@ void X86RegisterInfo::emitPrologue(MachineFunction &MF) const { I->addLiveIn(FramePtr); // Realign stack - if (needsStackRealignment(MF)) - BuildMI(MBB, MBBI, - TII.get(Is64Bit ? X86::AND64ri32 : X86::AND32ri), - StackPtr).addReg(StackPtr).addImm(-MaxAlign); + if (needsStackRealignment(MF)) { + MachineInstr *MI = + BuildMI(MBB, MBBI, + TII.get(Is64Bit ? X86::AND64ri32 : X86::AND32ri), + StackPtr).addReg(StackPtr).addImm(-MaxAlign); + // The EFLAGS implicit def is dead. + MI->getOperand(3).setIsDead(); + } } else NumBytes = StackSize - X86FI->getCalleeSavedFrameSize(); |