[PATCH] D78659: Add nomerge function attribute to supress tail merge optimization in simplifyCFG

Zequan Wu via Phabricator via cfe-commits cfe-commits at lists.llvm.org
Tue Apr 28 14:02:35 PDT 2020


zequanwu added a comment.

> Does sinking and hoisting remove the debug source location? I assumed that it wouldn't, but now after all the smooth stepping work, maybe it does.

Yes, both sinking and hoisting in simplifycfg remove the debug source location by `Instruction::applyMergedLocation`
sinking: https://github.com/llvm/llvm-project/blob/master/llvm/lib/Transforms/Utils/SimplifyCFG.cpp#L1646
hoisting: https://github.com/llvm/llvm-project/blob/master/llvm/lib/Transforms/Utils/SimplifyCFG.cpp#L1338


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D78659/new/

https://reviews.llvm.org/D78659





More information about the cfe-commits mailing list