[PATCH] D122482: [X86] combineADC - fold ADC(C1,C2,Carry) -> ADC(0,C1+C2,Carry)

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon added inline comments.


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Comment at: llvm/test/CodeGen/X86/combine-adc.ll:88
 ; X64-NEXT:    addb $-1, %dil
-; X64-NEXT:    movl $55, %eax
-; X64-NEXT:    adcl $-1, %eax
+; X64-NEXT:    adcl $54, %eax
 ; X64-NEXT:    retq
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craig.topper wrote:
> This still seems more complicated that it needs to be.
Yes combineCarryThroughADD is missing a fold to X86ISD::BT, its on my todo list.......


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  https://reviews.llvm.org/D122482/new/

https://reviews.llvm.org/D122482