[llvm] [DAG] Teach SelectionDAGBuilder to read parameter alignment of compressstore/expandload. (PR #83763)

[Craig Topper via llvm-commits]

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@@ -7,7 +7,23 @@ entry:
   ret void
 }
 
-; CHECK-LABEL: bb.0.entry:
+; CHECK-LABEL:   name: _Z3fooiPiPs
+; CHECK:         %1:vr128x = COPY $xmm1
+; CHECK-NEXT:    %0:vr256x = COPY $ymm0
+; CHECK-NEXT:    %2:vr128x = VPSLLWZ128ri %1, 15
+; CHECK-NEXT:    %3:vk16wm = VPMOVW2MZ128rr killed %2
+; CHECK-NEXT:    %4:vr128x = VPMOVDWZ256rr %0
+; CHECK-NEXT:    VPCOMPRESSWZ128mrk $noreg, 1, $noreg, 0, $noreg, killed %3, killed %4 :: (store unknown-size into `ptr null`, align 1)
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topperc wrote:

oh nevermind the check lines are just in a funny spot.

https://github.com/llvm/llvm-project/pull/83763