[llvm] [GlobalISel][TableGen] Take first result for multi-output instructions (PR #81130)

[Matt Arsenault via llvm-commits]

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@@ -426,44 +426,48 @@ body: |
     ; SI: liveins: $sgpr0_sgpr1
     ; SI-NEXT: {{  $}}
     ; SI-NEXT: [[COPY:%[0-9]+]]:sreg_64 = COPY $sgpr0_sgpr1
-    ; SI-NEXT: [[COPY1:%[0-9]+]]:sreg_32 = COPY [[COPY]].sub0
-    ; SI-NEXT: [[COPY2:%[0-9]+]]:sreg_32 = COPY [[COPY]].sub1
     ; SI-NEXT: [[S_MOV_B32_:%[0-9]+]]:sreg_32 = S_MOV_B32 2147483647
-    ; SI-NEXT: [[S_AND_B32_:%[0-9]+]]:sreg_32 = S_AND_B32 [[COPY2]], [[S_MOV_B32_]], implicit-def dead $scc
-    ; SI-NEXT: [[REG_SEQUENCE:%[0-9]+]]:sreg_64 = REG_SEQUENCE [[COPY1]], %subreg.sub0, [[S_AND_B32_]], %subreg.sub1
+    ; SI-NEXT: [[COPY1:%[0-9]+]]:sreg_32_xm0 = COPY [[COPY]].sub1
+    ; SI-NEXT: [[S_AND_B32_:%[0-9]+]]:sreg_32 = S_AND_B32 [[COPY1]], [[S_MOV_B32_]], implicit-def dead $scc
+    ; SI-NEXT: [[COPY2:%[0-9]+]]:sreg_32_xm0 = COPY [[S_AND_B32_]]
+    ; SI-NEXT: [[COPY3:%[0-9]+]]:sreg_32_xexec_hi_and_sreg_32_xm0 = COPY [[COPY]].sub0
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arsenm wrote:

weird that we gained this copy 

https://github.com/llvm/llvm-project/pull/81130