llvm-project
[AggressiveInstCombine] Fold split-width i32 cttz/ctlz patterns into wide i64 intrinsics
#192296

Merged

[AggressiveInstCombine] Fold split-width i32 cttz/ctlz patterns into wide i64 intrinsics #192296

usha1830 merged 6 commits into llvm:main from usha1830:cttz_ctlz_fold

Pre-commit tests for folding split-width i32 cttz/ctlz into wide (i64…

29a700e2

Fold split-width (i32) cttz/ctlz patterns into wide (i64) intrinsics

a1cd7e88

llvmbot added llvm:transforms

usha1830 requested a review from

davemgreen 42 days ago

usha1830 requested a review from

topperc 42 days ago

topperc commented on 2026-04-15

Address review comments: generalized the fold for integer types, remo…

ec035cce

usha1830 force pushed from 7d88d22d to ec035cce 41 days ago

davemgreen commented on 2026-04-20

Addressing review comments: removed phi based matcher for now, Used m…

2ec3ebc2

topperc commented on 2026-04-21

Update tests to drop unnecessary attributes

f911f4c0

topperc commented on 2026-04-22

Prevent this transform for very small types

b380ea27

topperc approved these changes on 2026-04-23

usha1830 merged 3aed0816 into main 31 days ago

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topperc

davemgreen

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