llvm-project
[InstCombine] Fold X * ldexp(1.0, Y) -> ldexp(X, Y).
#188493

Merged

[InstCombine] Fold X * ldexp(1.0, Y) -> ldexp(X, Y). #188493

rj-jesus merged 4 commits into llvm:main from rj-jesus:rjj/instcombine-fmul-ldexp

Add tests.

db834024

[InstCombine] Fold X * ldexp(1.0, Y) -> ldexp(X, Y).

760c2f65

rj-jesus requested a review from

arsenm 130 days ago

rj-jesus requested a review from

nikic 130 days ago

rj-jesus requested a review from

dtcxzyw 130 days ago

llvmbot added llvm:instcombine

llvmbot added llvm:transforms

arsenm commented on 2026-03-25

Check AllowContract on both instructions.

600ba9cc

arsenm commented on 2026-03-25

Check for reassoc rather than contract.

5fccb9af

arsenm approved these changes on 2026-03-26

rj-jesus merged 4d3759d8 into main 125 days ago

rj-jesus deleted the rjj/instcombine-fmul-ldexp branch 125 days ago

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