[llvm] [llvm][InstCombine] Fold signum(x) into scmp(x, 0) (PR #143445)

[Craig Topper via llvm-commits]

topperc wrote:

> Irrelevant to this PR in itself, but I did notice when running both src in tgt in llc, but why does llc lower the src in the alive2 posted better than the intrinsic?

I'm guessing you mean on X86. It looks neutral on RISC-V and scmp looks better for AArch64.

https://github.com/llvm/llvm-project/pull/143445