Pull in r191711 from upstream llvm trunk:
The X86FixupLEAs pass for Intel Atom must not call convertToThreeAddress on ADD16rr opcodes, if src1 != src, since that would cause convertToThreeAddress to try to create a virtual register. This is not permitted after register allocation, which is when the X86FixupLEAs pass runs. This patch fixes PR16785. Pull in r191715 from upstream llvm trunk: Forgot to add a break statement. This should enable building the x11-toolskits/libXaw port with CPUTYPE=atom. Approved by: re (gjb) Reported by: Kenta Suzumoto <kentas@hush.com> MFC after: 3 days
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svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=255978
@ -125,6 +125,15 @@ FixupLEAPass::postRAConvertToLEA(MachineFunction::iterator &MFI,
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// which requires isImm() to be true
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return 0;
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}
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break;
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case X86::ADD16rr:
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case X86::ADD16rr_DB:
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if (MI->getOperand(1).getReg() != MI->getOperand(2).getReg()) {
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// if src1 != src2, then convertToThreeAddress will
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// need to create a Virtual register, which we cannot do
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// after register allocation.
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return 0;
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}
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}
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return TII->convertToThreeAddress(MFI, MBBI, 0);
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}
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