[llvm] [SelectionDAG] Legalize vector types for atomic load (PR #111414)

[Matt Arsenault via llvm-commits]

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@@ -0,0 +1,17 @@
+; RUN: llc %s --print-after-isel --disable-verify 2>&1 | FileCheck %s
+
+define i32 @atomic_scalar() {
+; CHECK: # After Instruction Selection:
+; CHECK-NEXT: # Machine code for function atomic_scalar: IsSSA, TracksLiveness
+; CHECK-NEXT: Frame Objects:
+; CHECK-NEXT:   fi#0: size=4, align=4, at location [SP+8]
+; CHECK:      bb.0 (%ir-block.0):
+; CHECK-NEXT:   %0:gr32 = MOV32rm %stack.0, 1, $noreg, 0, $noreg :: (dereferenceable load acquire (s32) from %ir.1)
+; CHECK-NEXT:   $eax = COPY %0:gr32
+; CHECK-NEXT:   RET 0, $eax
+; CHECK:      # End machine code for function atomic_scalar.
+  %1 = alloca <1 x i32>
+  %2 = load atomic <1 x i32>, ptr %1 acquire, align 4
+  %3 = extractelement <1 x i32> %2, i32 0
+  ret i32 %3
+}
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arsenm wrote:

Test an fp case too 

https://github.com/llvm/llvm-project/pull/111414