[PATCH] D56151: [DebugInfo] PR40010: Avoid register coalesing altering DBG_VALUE valuations
Jeremy Morse via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Sat Dec 29 12:08:17 PST 2018
jmorse planned changes to this revision.
jmorse added a comment.
Hmmm. In retrospect, aiming to cover all cases where there's a def of the dest-reg in between the last src-def and the DBG_VALUE means considering control flow, which I haven't done.
It's probably better for now to only account for circumstances where reg-coalescing makes the DBG_VALUE live again, and thus we can be 100% confident it does the wrong thing. That more closely matches the test case uploaded.
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https://reviews.llvm.org/D56151/new/
https://reviews.llvm.org/D56151
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