llvm-project
[AMDGPU][Uniformity][TTI] Make Uniformity Analysis Operand-Aware via Custom Uniformity Checks
#137639

Merged

[AMDGPU][Uniformity][TTI] Make Uniformity Analysis Operand-Aware via Custom Uniformity Checks #137639

PankajDwivedi-25 merged 17 commits into llvm:main from PankajDwivedi-25:users/pkd-25/make-ui-operand-aware

PankajDwivedi-25 requested a review from

jayfoad 1 year ago

PankajDwivedi-25 requested a review from

ssahasra 1 year ago

llvmbot added backend:AMDGPU

llvmbot added llvm:analysis

jayfoad requested changes on 2025-04-28

arsenm commented on 2025-04-29

llvmbot added llvm:adt

PankajDwivedi-25 force pushed 257 days ago

ssahasra commented on 2025-09-22

PankajDwivedi-25 force pushed 253 days ago

arsenm commented on 2025-09-25

PankajDwivedi-25 changed the title ~~[AMDGPU][TTI] Add Target Hook for Instruction Uniformity (getInstructionUniformity)~~ [AMDGPU][TTI] Add Target Hook for Instruction Uniformity 252 days ago

PankajDwivedi-25 changed the title ~~[AMDGPU][TTI] Add Target Hook for Instruction Uniformity~~ [AMDGPU][TTI] Add Target Hook for the custom Instruction Uniformity 252 days ago

PankajDwivedi-25 changed the title ~~[AMDGPU][TTI] Add Target Hook for the custom Instruction Uniformity~~ [AMDGPU][TTI] Add target hook for the custom instruction uniformity 252 days ago

PankajDwivedi-25 force pushed 215 days ago

llvmbot added llvm:codegen

arsenm commented on 2025-11-01

jayfoad commented on 2025-11-03

arsenm commented on 2025-11-05

PankajDwivedi-25 changed the title ~~[AMDGPU][TTI] Add target hook for the custom instruction uniformity~~ [TTI] Add target hook for the custom instruction uniformity 209 days ago

llvmbot added backend:NVPTX

PankajDwivedi-25 changed the title ~~[TTI] Add target hook for the custom instruction uniformity~~ [TTI] Introduce getInstructionUniformity API for flexible uniformity analysis 199 days ago

PankajDwivedi-25 force pushed 196 days ago

nhaehnle commented on 2025-11-19

jayfoad commented on 2025-11-20

PankajDwivedi-25 force pushed 169 days ago

PankajDwivedi-25 changed the title ~~[TTI] Introduce getInstructionUniformity API for flexible uniformity analysis~~ [AMDGPU][Uniformity][TTI] Make Uniformity Analysis Operand-Aware with Custom Target Hook 169 days ago

arsenm commented on 2025-12-16

jayfoad commented on 2025-12-16

PankajDwivedi-25 changed the title ~~[AMDGPU][Uniformity][TTI] Make Uniformity Analysis Operand-Aware with Custom Target Hook~~ [AMDGPU][Uniformity][TTI] Make Uniformity Analysis Operand-Aware via Custom Divergence Checks 169 days ago

ruiling commented on 2026-03-18

PankajDwivedi-25 force pushed 77 days ago

jayfoad commented on 2026-03-18

PankajDwivedi-25 requested a review from

jayfoad 76 days ago

PankajDwivedi-25 requested a review from

ruiling 76 days ago

PankajDwivedi-25 requested a review from

ssahasra 76 days ago

ruiling commented on 2026-03-24

[NFC] move isDivergentUse so later dependent function in pushUsers ca…

a30a915e

add target hook to capture special operand uniformity and update UA t…

c41a9ec6

update enum name for more clarity

c9a6192d

Apply suggestion from @arsenm

f59ff790

let getInstructionUniformity hook wrap isSourceOfDivergence/isAlwaysU…

e64e3a6f

update the operand check & update machine inst uniformity

12ceaf7c

Fix formatting

cf4dcef9

update mir test check

96fe05ee

seperate complex target based custom logic through target hook

41eea7b4

refactor: rebased with latest changes

1865da33

refactor

f2f8b5ad

Update llvm/lib/Analysis/UniformityAnalysis.cpp

2bbcf97a

[Review] address changes

f81169c8

change the approach from identifying uniform to divergent

f29a21e9

review: address suggestions

0a3b84a7

update the divergent logic for wave_shuffle

06b7234e

PankajDwivedi-25 force pushed to 06b7234e 72 days ago

jayfoad commented on 2026-03-24

review: address suggestion

e49b7e4c

PankajDwivedi-25 force pushed to e49b7e4c 71 days ago

ruiling approved these changes on 2026-03-24

PankajDwivedi-25 changed the title ~~[AMDGPU][Uniformity][TTI] Make Uniformity Analysis Operand-Aware via Custom Divergence Checks~~ [AMDGPU][Uniformity][TTI] Make Uniformity Analysis Operand-Aware via Custom Uniformity Checks 71 days ago

jayfoad approved these changes on 2026-03-24

PankajDwivedi-25 merged 6e2a720d into main 71 days ago

Reviewers

jayfoad

ruiling

ssahasra

arsenm

nhaehnle

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backend:AMDGPU llvm:codegen backend:NVPTX llvm:analysis llvm:adt

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llvm-project [AMDGPU][Uniformity][TTI] Make Uniformity Analysis Operand-Aware via Custom Uniformity Checks #137639 Merged

[AMDGPU][Uniformity][TTI] Make Uniformity Analysis Operand-Aware via Custom Uniformity Checks #137639

llvm-project
[AMDGPU][Uniformity][TTI] Make Uniformity Analysis Operand-Aware via Custom Uniformity Checks
#137639

Merged