diff options
| -rw-r--r-- | llvm/lib/Target/X86/X86FrameLowering.cpp | 36 |
1 files changed, 0 insertions, 36 deletions
diff --git a/llvm/lib/Target/X86/X86FrameLowering.cpp b/llvm/lib/Target/X86/X86FrameLowering.cpp index 9ed868558b2..713b4fe7cc1 100644 --- a/llvm/lib/Target/X86/X86FrameLowering.cpp +++ b/llvm/lib/Target/X86/X86FrameLowering.cpp @@ -312,38 +312,6 @@ void mergeSPUpdatesUp(MachineBasicBlock &MBB, MachineBasicBlock::iterator &MBBI, } } -/// mergeSPUpdatesDown - Merge two stack-manipulating instructions lower -/// iterator. -static -void mergeSPUpdatesDown(MachineBasicBlock &MBB, - MachineBasicBlock::iterator &MBBI, - unsigned StackPtr, uint64_t *NumBytes = nullptr) { - // FIXME: THIS ISN'T RUN!!! - return; - - if (MBBI == MBB.end()) return; - - MachineBasicBlock::iterator NI = std::next(MBBI); - if (NI == MBB.end()) return; - - unsigned Opc = NI->getOpcode(); - if ((Opc == X86::ADD64ri32 || Opc == X86::ADD64ri8 || - Opc == X86::ADD32ri || Opc == X86::ADD32ri8) && - NI->getOperand(0).getReg() == StackPtr) { - if (NumBytes) - *NumBytes -= NI->getOperand(2).getImm(); - MBB.erase(NI); - MBBI = NI; - } else if ((Opc == X86::SUB64ri32 || Opc == X86::SUB64ri8 || - Opc == X86::SUB32ri || Opc == X86::SUB32ri8) && - NI->getOperand(0).getReg() == StackPtr) { - if (NumBytes) - *NumBytes += NI->getOperand(2).getImm(); - MBB.erase(NI); - MBBI = NI; - } -} - /// mergeSPUpdates - Checks the instruction before/after the passed /// instruction. If it is an ADD/SUB/LEA instruction it is deleted argument and /// the stack adjustment is returned as a positive value for ADD/LEA and a @@ -823,10 +791,6 @@ void X86FrameLowering::emitPrologue(MachineFunction &MF) const { // the callee has more arguments then the caller. NumBytes -= mergeSPUpdates(MBB, MBBI, StackPtr, true); - // If there is an ADD32ri or SUB32ri of ESP immediately after this - // instruction, merge the two instructions. - mergeSPUpdatesDown(MBB, MBBI, StackPtr, &NumBytes); - // Adjust stack pointer: ESP -= numbytes. // Windows and cygwin/mingw require a prologue helper routine when allocating |
