[llvm-branch-commits] [llvm] [RISCV] Use larger copies when register tuples are aligned (PR #84455)

[Craig Topper via llvm-branch-commits]

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@@ -212,19 +185,13 @@ body:             |
     ; CHECK-NEXT: $v7 = VMV1R_V $v14
     ; CHECK-NEXT: $v8 = VMV1R_V $v15
     ; CHECK-NEXT: $v9 = VMV1R_V $v16
-    ; CHECK-NEXT: $v4 = VMV1R_V $v10
-    ; CHECK-NEXT: $v5 = VMV1R_V $v11
-    ; CHECK-NEXT: $v6 = VMV1R_V $v12
-    ; CHECK-NEXT: $v7 = VMV1R_V $v13
-    ; CHECK-NEXT: $v8 = VMV1R_V $v14
-    ; CHECK-NEXT: $v9 = VMV1R_V $v15
+    ; CHECK-NEXT: $v4m2 = VMV2R_V $v10m2
+    ; CHECK-NEXT: $v6m2 = VMV2R_V $v12m2
+    ; CHECK-NEXT: $v8m2 = VMV2R_V $v14m2
     ; CHECK-NEXT: $v10 = VMV1R_V $v16
-    ; CHECK-NEXT: $v22 = VMV1R_V $v16
-    ; CHECK-NEXT: $v21 = VMV1R_V $v15
-    ; CHECK-NEXT: $v20 = VMV1R_V $v14
-    ; CHECK-NEXT: $v19 = VMV1R_V $v13
-    ; CHECK-NEXT: $v18 = VMV1R_V $v12
-    ; CHECK-NEXT: $v17 = VMV1R_V $v11
+    ; CHECK-NEXT: $v22m2 = VMV2R_V $v16m2
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topperc wrote:

This copies v16-v17 to v22-23, but the copy was for `$v16_v17_v18_v19_v20_v21_v22 = COPY $v10_v11_v12_v13_v14_v15_v16` so v23 shouldn't be touched.

https://github.com/llvm/llvm-project/pull/84455