[llvm-branch-commits] [llvm] PeepholeOpt: Fix looking for def of current copy to coalesce (PR #125533)

[Pengcheng Wang via llvm-branch-commits]

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@@ -354,44 +353,38 @@ define {<8 x i64>, <8 x i64>, <8 x i64>, <8 x i64>, <8 x i64>, <8 x i64>} @load_
 ; RV32-NEXT:    vmerge.vvm v20, v8, v16, v0
 ; RV32-NEXT:    addi a1, sp, 16
 ; RV32-NEXT:    vs4r.v v20, (a1) # Unknown-size Folded Spill
-; RV32-NEXT:    vmv1r.v v0, v3
+; RV32-NEXT:    vmv1r.v v0, v12
 ; RV32-NEXT:    csrr a1, vlenb
-; RV32-NEXT:    li a3, 68
-; RV32-NEXT:    mul a1, a1, a3
+; RV32-NEXT:    slli a1, a1, 6
 ; RV32-NEXT:    add a1, sp, a1
 ; RV32-NEXT:    addi a1, a1, 16
 ; RV32-NEXT:    vl8r.v v16, (a1) # Unknown-size Folded Reload
 ; RV32-NEXT:    csrr a1, vlenb
-; RV32-NEXT:    li a3, 76
+; RV32-NEXT:    li a3, 72
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wangpc-pp wrote:

This looks like an improvement.

https://github.com/llvm/llvm-project/pull/125533