[llvm] [InstCombine] Fold tan(x) * cos(x) => sin(x) (PR #136319)

[Yingwei Zheng via llvm-commits]

https://github.com/dtcxzyw approved this pull request.

LGTM w/ nit. Please wait for @arsenm to double confirm https://github.com/llvm/llvm-project/pull/136319#discussion_r2051469561.


https://github.com/llvm/llvm-project/pull/136319