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2017 Sep 27
0
[MachineCopyPropagation] Issue with register forwarding/allocation/verifier in out-of-tree target
...to detect this situation just by looking at the VNInfo. - I guess the RAGreedy result is indeed wrong then. If I'm reading this correctly, it basically looks like this (when simplified to the problem at hand): BB2: vreg76 = COPY vreg77<kill> vreg77 = COPY vreg76 vreg77 = someop vreg77<kill> CondJmp BB2 the `vreg77=COPY` should have used a different vreg. My guess would be that the liverange splitting code makes similar assumptions as the ConnectedVNInfoEqClasses. - Matthias -------------- next part -------------- An HTML attachment was scrubbed... URL: <ht...
2017 Sep 27
2
[MachineCopyPropagation] Issue with register forwarding/allocation/verifier in out-of-tree target
On 9/26/2017 6:47 PM, Matthias Braun wrote: > >> On Sep 26, 2017, at 3:33 PM, Geoff Berry <gberry at codeaurora.org >> <mailto:gberry at codeaurora.org>> wrote: >> >> >> >> On 9/26/2017 6:11 PM, Matthias Braun wrote: >>>> On Sep 26, 2017, at 2:39 PM, Geoff Berry via llvm-dev >>>> <llvm-dev at lists.llvm.org