[AMDGPU] fix for register coalescer
AbandonedPublic

Authored by dfukalov on Jun 25 2018, 12:31 PM.

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MatzeB
Summary

Added ability to return from joinSubRegRanges() in case of mapping was changed after check in joinVirtRegs()

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rL LLVM
dfukalov created this revision.Jun 25 2018, 12:31 PM

The testcase compiles fine with ToT at r335473.

arsenm added a subscriber: arsenm.Jun 25 2018, 12:55 PM
arsenm added inline comments.
test/CodeGen/AMDGPU/regcoal-subrange-join-crash.ll
1–3

Subtle things like this really need a MIR testcase

dfukalov abandoned this revision.Jun 26 2018, 5:27 AM

The testcase compiles fine with ToT at r335473.

yep, your commit https://reviews.llvm.org/rL335472 fixed it, thanks!