[llvm] [X86][APX] Use TEST instruction for CLOAD/CSTORE (PR #151160)

[Phoebe Wang via llvm-commits]

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@@ -162,7 +162,7 @@ entry:
 define void @load_zext(i1 %cond, ptr %b, ptr %p) {
 ; CHECK-LABEL: load_zext:
 ; CHECK:       # %bb.0: # %entry
-; CHECK-NEXT:    andb $1, %dil
+; CHECK-NEXT:    testb $1, %dil
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phoebewang wrote:

> @phoebewang Then it seems clang generates the worse code than gcc about this.
> 
> https://www.godbolt.org/z/T7djcxv5e

Why worse? It reduces a branch.

https://github.com/llvm/llvm-project/pull/151160