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Add an option to disable spill fusing in the X86 backend
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11531 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -31,6 +31,9 @@ namespace {
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cl::opt<bool>
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NoFPElim("disable-fp-elim",
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cl::desc("Disable frame pointer elimination optimization"));
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cl::opt<bool>
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NoFusing("disable-spill-fusing",
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cl::desc("Disable fusing of spill code into instructions"));
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}
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X86RegisterInfo::X86RegisterInfo()
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@ -106,6 +109,8 @@ static MachineInstr *MakeRMIInst(unsigned Opcode, unsigned FrameIndex,
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bool X86RegisterInfo::foldMemoryOperand(MachineBasicBlock::iterator &MI,
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unsigned i, int FrameIndex) const {
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if (NoFusing) return false;
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/// FIXME: This should obviously be autogenerated by tablegen when patterns
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/// are available!
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MachineBasicBlock& MBB = *MI->getParent();
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