[llvm] [CodeGen] [AMDGPU] Attempt DAGCombine for fmul with select to ldexp (PR #111109)

[Vikash Gupta via llvm-commits]

vg0204 wrote:

I updated with new test cases as well as the old ones that needs changes, but for some reason, the only below testcase

> llvm/test/CodeGen/AMDGPU/amdgpu-simplify-libcall-pow-codegen.ll

It is giving invalid bitcast error **"from i16 to i32"** while trying to update with **update_llc_tests_check.py** script. But, bizarelly when running the command sequence of the test in terminal its working fine, generating assembly as supposed to be with dagcombine happening. I am perplexed!!

https://github.com/llvm/llvm-project/pull/111109