diff options
| author | Eli Friedman <eli.friedman@gmail.com> | 2010-08-16 21:03:32 +0000 |
|---|---|---|
| committer | Eli Friedman <eli.friedman@gmail.com> | 2010-08-16 21:03:32 +0000 |
| commit | 321473d51dacec12d338a5574d4c942889b682c1 (patch) | |
| tree | 9ae3937e8de2badc4db877ccd01bbdd0c31bb317 /lib/Target | |
| parent | 0b95fdbd6f9f9c9275c77c93a522b0998efbbff1 (diff) | |
Don't attempt to SimplifyShortMoveForm in 64-bit mode.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111182 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target')
| -rw-r--r-- | lib/Target/X86/X86MCInstLower.cpp | 22 |
1 files changed, 13 insertions, 9 deletions
diff --git a/lib/Target/X86/X86MCInstLower.cpp b/lib/Target/X86/X86MCInstLower.cpp index 936ad163cf..087a3bd0e7 100644 --- a/lib/Target/X86/X86MCInstLower.cpp +++ b/lib/Target/X86/X86MCInstLower.cpp @@ -252,7 +252,13 @@ static void SimplifyShortImmForm(MCInst &Inst, unsigned Opcode) { } /// \brief Simplify things like MOV32rm to MOV32o32a. -static void SimplifyShortMoveForm(MCInst &Inst, unsigned Opcode) { +static void SimplifyShortMoveForm(X86AsmPrinter &Printer, MCInst &Inst, + unsigned Opcode) { + // Don't make these simplifications in 64-bit mode; other assemblers don't + // perform them because they make the code larger. + if (Printer.getSubtarget().is64Bit()) + return; + bool IsStore = Inst.getOperand(0).isReg() && Inst.getOperand(1).isReg(); unsigned AddrBase = IsStore; unsigned RegOp = IsStore ? 0 : 5; @@ -458,15 +464,13 @@ void X86MCInstLower::Lower(const MachineInstr *MI, MCInst &OutMI) const { // MOV64ao8, MOV64o8a // XCHG16ar, XCHG32ar, XCHG64ar case X86::MOV8mr_NOREX: - case X86::MOV8mr: SimplifyShortMoveForm(OutMI, X86::MOV8ao8); break; + case X86::MOV8mr: SimplifyShortMoveForm(AsmPrinter, OutMI, X86::MOV8ao8); break; case X86::MOV8rm_NOREX: - case X86::MOV8rm: SimplifyShortMoveForm(OutMI, X86::MOV8o8a); break; - case X86::MOV16mr: SimplifyShortMoveForm(OutMI, X86::MOV16ao16); break; - case X86::MOV16rm: SimplifyShortMoveForm(OutMI, X86::MOV16o16a); break; - case X86::MOV32mr: SimplifyShortMoveForm(OutMI, X86::MOV32ao32); break; - case X86::MOV32rm: SimplifyShortMoveForm(OutMI, X86::MOV32o32a); break; - case X86::MOV64mr: SimplifyShortMoveForm(OutMI, X86::MOV64ao64); break; - case X86::MOV64rm: SimplifyShortMoveForm(OutMI, X86::MOV64o64a); break; + case X86::MOV8rm: SimplifyShortMoveForm(AsmPrinter, OutMI, X86::MOV8o8a); break; + case X86::MOV16mr: SimplifyShortMoveForm(AsmPrinter, OutMI, X86::MOV16ao16); break; + case X86::MOV16rm: SimplifyShortMoveForm(AsmPrinter, OutMI, X86::MOV16o16a); break; + case X86::MOV32mr: SimplifyShortMoveForm(AsmPrinter, OutMI, X86::MOV32ao32); break; + case X86::MOV32rm: SimplifyShortMoveForm(AsmPrinter, OutMI, X86::MOV32o32a); break; case X86::ADC8ri: SimplifyShortImmForm(OutMI, X86::ADC8i8); break; case X86::ADC16ri: SimplifyShortImmForm(OutMI, X86::ADC16i16); break; |