diff options
Diffstat (limited to 'lib/Target/X86/X86InstrInfo.cpp')
| -rw-r--r-- | lib/Target/X86/X86InstrInfo.cpp | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/lib/Target/X86/X86InstrInfo.cpp b/lib/Target/X86/X86InstrInfo.cpp index c8621ad..0e02ef0 100644 --- a/lib/Target/X86/X86InstrInfo.cpp +++ b/lib/Target/X86/X86InstrInfo.cpp @@ -112,9 +112,20 @@ unsigned X86InstrInfo::isStoreToStackSlot(MachineInstr *MI, } -bool X86InstrInfo::isOtherReMaterializableLoad(MachineInstr *MI) const { +bool X86InstrInfo::isTriviallyReMaterializable(MachineInstr *MI) const { switch (MI->getOpcode()) { default: break; + case X86::FpLD0: + case X86::FpLD1: + case X86::MOV8ri: + case X86::MOV16ri: + case X86::MOV32ri: + case X86::MMX_V_SET0: + case X86::MMX_V_SETALLONES: + case X86::V_SET0: + case X86::V_SETALLONES: + // These instructions are always trivially rematerializable. + return true; case X86::MOV8rm: case X86::MOV16rm: case X86::MOV16_rm: @@ -128,6 +139,7 @@ bool X86InstrInfo::isOtherReMaterializableLoad(MachineInstr *MI) const { case X86::MOVAPDrm: case X86::MMX_MOVD64rm: case X86::MMX_MOVQ64rm: + // Loads from constant pools are trivially rematerializable. return MI->getOperand(1).isRegister() && MI->getOperand(2).isImmediate() && MI->getOperand(3).isRegister() && MI->getOperand(4).isConstantPoolIndex() && MI->getOperand(1).getReg() == 0 && |