[llvm] [AMDGPU][SDAG] Try folding "lshr i64 + mad" to "mad_[iu]64_[iu]32" (PR #119218)

[Vikram Hegde via llvm-commits]

vikramRH wrote:

> > This is essentially a revert of #76285.
> 
> I wouldn't go that far. It fixes a code quality regression caused by that patch in the specific case of the divisor C 0 being 2 32 .

right , 

> > This is essentially a revert of #76285.
> 
> I wouldn't go that far. It fixes a code quality regression caused by that patch in the specific case of the divisor C 0 being 2 32 .

right, updated the summary. sorry for the confusion

https://github.com/llvm/llvm-project/pull/119218