[llvm] [SelectionDAG] Optimize unaligned load stores to realign after offset (PR #145309)

[Acthinks Yang via llvm-commits]

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@@ -6,11 +6,9 @@ define void @store_b32_basealign2_offset1(ptr align 2 %p, i32 %v) {
 ; CHECK-LABEL: store_b32_basealign2_offset1:
 ; CHECK:       # %bb.0: # %entry
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Acthinks wrote:

@arsenm  The effective diff is here:

https://github.com/llvm/llvm-project/pull/145309