[llvm-branch-commits] [llvm] AMDGPU: Fix foldImmediate breaking register class constraints (PR #127481)

[Christudasan Devadasan via llvm-branch-commits]

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@@ -419,25 +419,30 @@ body:             |
 
 ...
 
-# FIXME:
-# ---
-# name:            fold_v_mov_b64_64_to_unaligned
-# body:             |
-#   bb.0:
-#     %0:vreg_64_align2 = V_MOV_B64_e32 1311768467750121200, implicit $exec
-#     %1:vreg_64 = COPY killed %0
-#     SI_RETURN_TO_EPILOG implicit %1
-# ...
-
-# FIXME:
-# ---
-# name:            fold_v_mov_b64_pseudo_64_to_unaligned
-# body:             |
-#   bb.0:
-#     %0:vreg_64_align2 = V_MOV_B64_PSEUDO 1311768467750121200, implicit $exec
-#     %1:vreg_64 = COPY killed %0
-#     SI_RETURN_TO_EPILOG implicit %1
-# ...
+---
+name:            fold_v_mov_b64_64_to_unaligned
+body:             |
+  bb.0:
+    ; GCN-LABEL: name: fold_v_mov_b64_64_to_unaligned
+    ; GCN: [[V_MOV_B64_e32_:%[0-9]+]]:vreg_64_align2 = V_MOV_B64_e32 1311768467750121200, implicit $exec
+    ; GCN-NEXT: [[V_MOV_B:%[0-9]+]]:vreg_64_align2 = V_MOV_B64_PSEUDO 1311768467750121200, implicit $exec
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cdevadas wrote:

%1 has been forced to *_aling2 after the transformation. I assume it is because the src register in the original copy was of *_aling2.

https://github.com/llvm/llvm-project/pull/127481