[llvm-branch-commits] [llvm] [AArch64][GlobalISel] Add support for lowering trunc stores of vector bools. (PR #121169)

[Matt Arsenault via llvm-branch-commits]

================
@@ -4142,9 +4142,40 @@ LegalizerHelper::LegalizeResult 
LegalizerHelper::lowerStore(GStore &StoreMI) {
   }
 
   if (MemTy.isVector()) {
-    // TODO: Handle vector trunc stores
-    if (MemTy != SrcTy)
+    LLT MemScalarTy = MemTy.getElementType();
+    if (MemTy != SrcTy) {
----------------
arsenm wrote:

If the DAG has scalarizeVectorStore, move this to a similarly named helper?

https://github.com/llvm/llvm-project/pull/121169
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