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author	Nikita Popov <nikita.ppv@gmail.com>
	Thu, 18 Feb 2021 21:29:19 +0000 (22:29 +0100)
committer	Tom Stellard <tstellar@redhat.com>
	Sat, 20 Feb 2021 00:32:07 +0000 (16:32 -0800)
commit	8e9c2ad95eb5ab439b933d8c793957bc4d82e456
tree	0959575d2f3e6a54b0111d589701e020482f3676	tree \| snapshot
parent	d1d7dc779a296001568d855bba7843a9eb94a585	commit \| diff

[DCE] Don't remove non-willreturn calls

In both ADCE and BDCE (via DemandedBits) we should not remove
instructions that are not guaranteed to return. This issue was
pointed out by fhahn in the recent llvm-dev thread.

Differential Revision: https://reviews.llvm.org/D96993

(cherry picked from commit 2f17ed294fcd8cde505b93c9c5bbab06ba59051c)

external/llvm-project

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llvm/lib/Analysis/DemandedBits.cpp		diff \| blob \| history
llvm/lib/Transforms/Scalar/ADCE.cpp		diff \| blob \| history
llvm/test/Feature/OperandBundles/adce.ll		diff \| blob \| history
llvm/test/LTO/X86/parallel.ll		diff \| blob \| history
llvm/test/Transforms/ADCE/dce_pure_call.ll		diff \| blob \| history
llvm/test/Transforms/ADCE/willreturn.ll		diff \| blob \| history
llvm/test/Transforms/BDCE/dce-pure.ll		diff \| blob \| history
llvm/test/Transforms/BDCE/dead-void-ro.ll		diff \| blob \| history
llvm/test/Transforms/BDCE/willreturn.ll		diff \| blob \| history
llvm/test/tools/gold/X86/parallel.ll		diff \| blob \| history