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 334 days ago

PankajDwivedi-25 requested a review from

ssahasra 334 days 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 190 days ago

ssahasra commented on 2025-09-22

PankajDwivedi-25 force pushed to 860b4859 186 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 184 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 184 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 184 days ago

PankajDwivedi-25 force pushed from caa73544 to afec697b 148 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 141 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 131 days ago

PankajDwivedi-25 force pushed from dd8c0e15 to 5647603b 129 days ago

nhaehnle commented on 2025-11-19

jayfoad commented on 2025-11-20

PankajDwivedi-25 force pushed from 9e7f001d to 1e81c496 102 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 102 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 101 days ago

ruiling commented on 2026-03-18

PankajDwivedi-25 force pushed from 3425f65e to b191d486 10 days ago

jayfoad commented on 2026-03-18

PankajDwivedi-25 requested a review from

jayfoad 8 days ago

PankajDwivedi-25 requested a review from

ruiling 8 days ago

PankajDwivedi-25 requested a review from

ssahasra 8 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 from 80bb76c2 to 06b7234e 4 days ago

jayfoad commented on 2026-03-24

review: address suggestion

e49b7e4c

PankajDwivedi-25 force pushed from 2c8c0c98 to e49b7e4c 4 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 4 days ago

jayfoad approved these changes on 2026-03-24

PankajDwivedi-25 merged 6e2a720d into main 4 days ago

Reviewers

jayfoad

ruiling

ssahasra

arsenm

nhaehnle

Assignees

No one assigned

Labels

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

Milestone

No milestone

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