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Make the clobber analysis a bit more smart: we only are careful about
early clobbers if the clobber list contains a *register* not some thing like {memory}, {dirflag} etc. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47457 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -3735,9 +3735,19 @@ void SelectionDAGLowering::visitInlineAsm(CallSite CS) {
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SawEarlyClobber |= OpInfo.isEarlyClobber;
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// If we see a clobber of a register, it is an early clobber.
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if (OpInfo.Type == InlineAsm::isClobber &&
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OpInfo.ConstraintType == TargetLowering::C_Register)
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SawEarlyClobber = true;
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if (!SawEarlyClobber &&
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OpInfo.Type == InlineAsm::isClobber &&
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OpInfo.ConstraintType == TargetLowering::C_Register) {
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// Note that we want to ignore things that we don't trick here, like
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// dirflag, fpsr, flags, etc.
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std::pair<unsigned, const TargetRegisterClass*> PhysReg =
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TLI.getRegForInlineAsmConstraint(OpInfo.ConstraintCode,
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OpInfo.ConstraintVT);
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if (PhysReg.first || PhysReg.second) {
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// This is a register we know of.
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SawEarlyClobber = true;
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}
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}
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// If this is a memory input, and if the operand is not indirect, do what we
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// need to to provide an address for the memory input.
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