[llvm] LoopVectorize/test: add missing CHECK lines, cleanup intrinsic.ll (PR #70202)

[Florian Hahn via llvm-commits]

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@@ -493,9 +513,13 @@ for.end:                                          ; preds = %for.body, %entry
   ret void
 }
 
-declare float @llvm.copysign.f32(float, float) nounwind readnone
+declare float @llvm.copysign.f32(float, float)
 
-define void @copysign_f64(i32 %n, ptr noalias %y, ptr noalias %x, ptr noalias %z) nounwind uwtable {
+define void @copysign_f64(i32 %n, ptr %y, ptr %x, ptr %z) {
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fhahn wrote:

wrapping here looks odd

https://github.com/llvm/llvm-project/pull/70202