Florian Hahn d4c070d801 [VectorCombine] Freeze index unless it is known to be non-poison. ... If the index itself is already poison, the poison propagates through instructions clamping the index to a valid range. This still causes introducing a load of poison, as flagged by Alive2 and pointed out at 575e2aff55. This patch updates the code to freeze the index, unless it is proven to not be poison. Reviewed By: nlopes Differential Revision: https://reviews.llvm.org/D103378		2021-06-01 10:40:57 +01:00
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AArch64	[VectorCombine] Freeze index unless it is known to be non-poison.	2021-06-01 10:40:57 +01:00
AMDGPU	[IR] Let IRBuilder's CreateVectorSplat/CreateShuffleVector use poison as placeholder	2020-12-30 04:21:04 +09:00
Hexagon	Precommit transform tests that have poison as insertelement's placeholder	2020-12-24 11:46:17 +09:00
X86	[CostModel][X86] Improve accuracy of vector non-uniform shift costs on XOP/AVX2 targets	2021-05-24 14:18:21 +01:00
load-insert-store.ll	[VectorCombine] Use constant range info for index scalarization legality.	2021-05-25 13:58:42 +01:00