PR #198808 [GlobalISel] Port `SimplifyDemandedBits` over

[GlobalISel] Port `SimplifyDemandedBits` over #198808

lialan merged 7 commits into llvm:main from lialan:gisel_demanded_bits_impl

lialan requested a review from

davemgreen 159 days ago

lialan requested a review from

copilot-pull-request-reviewer 159 days ago

lialan requested a review from

DavidSpickett 159 days ago

lialan requested a review from

paulwalker-arm 159 days ago

llvmorg-github-actions added backend:AMDGPU

llvmorg-github-actions added llvm:globalisel

llvmorg-github-actions added llvm:SelectionDAG

copilot-pull-request-reviewer commented on 2026-05-20

lialan force pushed from a2edc2fc to 54b95a73 159 days ago

lialan force pushed from 54b95a73 to f79b4e6f 159 days ago

llvmorg-github-actions added backend:AArch64

nhaehnle commented on 2026-05-21

lialan changed the title ~~[GlobalISel] Add a demanded-bits mask to `KnownBits` queries~~ [GlobalISel] Port over `simplifyDemandedBits` to GlobalISel 158 days ago

lialan commented on 2026-05-26

lialan force pushed from f79b4e6f to 473df855 153 days ago

lialan force pushed from 473df855 to cc10954c 139 days ago

llvmorg-github-actions added flang:driver

llvmorg-github-actions added flang

lialan force pushed from daf039eb to 8a5bb965 137 days ago

lialan force pushed from 8a5bb965 to 4ac950bc 137 days ago

lialan force pushed from feffd98c to 2c2c42f4 136 days ago

lialan force pushed from 058d5b9a to cd427c4d 136 days ago

lialan force pushed from cd427c4d to bb8feb71 136 days ago

lialan force pushed from bb8feb71 to f67c4063 136 days ago

lialan requested a review from

nhaehnle 136 days ago

lialan requested a review from

jayfoad 136 days ago

lialan force pushed from 97e8b146 to 3d0e2b1a 131 days ago

lialan force pushed from 3d0e2b1a to a381de79 97 days ago

lialan force pushed from a72bf8bb to d53cc2df 80 days ago

lialan requested a review from

qcolombet 80 days ago

nhaehnle commented on 2026-09-29

lialan force pushed from d53cc2df to 533728df 25 days ago

lialan force pushed from 533728df to c19979ba 25 days ago

lialan force pushed from c19979ba to aa4e4a56 18 days ago

lialan changed the title ~~[GlobalISel] Port over `simplifyDemandedBits` to GlobalISel~~ [GlobalISel] Add simplifyDemandedBits to GlobalISel 18 days ago

lialan changed the title ~~[GlobalISel] Add simplifyDemandedBits to GlobalISel~~ [GlobalISel] Port simplifyDemandedBits to CombinerHelper 18 days ago

tgymnich commented on 2026-10-09

lialan requested a review from

tgymnich 17 days ago

lialan requested a review from

nhaehnle 17 days ago

lialan changed the title ~~[GlobalISel] Port simplifyDemandedBits to CombinerHelper~~ [GlobalISel] Port simplifyDemandedBits for G_AND and G_OR 17 days ago

lialan changed the title ~~[GlobalISel] Port simplifyDemandedBits for G_AND and G_OR~~ [GlobalISel] Port `SimplifyDemandedBits` over 17 days ago

lialan force pushed from 2619f72c to 0f008fb4 14 days ago

lialan force pushed from 0f008fb4 to b03b38a8 13 days ago

feat(gisel): add demanded-bits simplification

24e30844

test(aarch64): refresh demanded-bits checks

5c7436a1

fix(gisel): preserve semantics in bit rewrites

bb30edbb

refactor(gisel): limit demanded bits to AND/OR

e1b559e1

refactor(GlobalISel): organize demanded-bit matching

15574b19

fix(GlobalISel): make demanded bits symmetric

cf61e016

test(aarch64): update demanded-bits checks

1a7392a2

lialan force pushed from e2e03848 to 1a7392a2 10 days ago

tgymnich approved these changes on 2026-10-19

lialan merged 1190b43b into main 7 days ago

lialan deleted the gisel_demanded_bits_impl branch 7 days ago

Reviewers

tgymnich

nhaehnle

copilot-pull-request-reviewer

davemgreen

DavidSpickett

paulwalker-arm

jayfoad

qcolombet

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backend:AArch64 backend:AMDGPU llvm:globalisel flang:driver flang llvm:SelectionDAG

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llvm-project [GlobalISel] Port `SimplifyDemandedBits` over #198808 Merged

[GlobalISel] Port `SimplifyDemandedBits` over #198808

llvm-project
[GlobalISel] Port `SimplifyDemandedBits` over
#198808

Merged