[llvm-branch-commits] [llvm] AMDGPU: Fold frame indexes into s_or_b32 and s_and_b32 (PR #102345)

[Stanislav Mekhanoshin via llvm-branch-commits]

================
@@ -190,31 +186,31 @@ body:             |
     ; MUBUFW64-LABEL: name: s_and_b32__sgpr__fi_literal_offset
     ; MUBUFW64: liveins: $sgpr8
     ; MUBUFW64-NEXT: {{  $}}
-    ; MUBUFW64-NEXT: $sgpr4 = S_LSHR_B32 $sgpr32, 6, implicit-def $scc
-    ; MUBUFW64-NEXT: $sgpr4 = S_ADD_I32 killed $sgpr4, 80, implicit-def $scc
-    ; MUBUFW64-NEXT: renamable $sgpr7 = S_AND_B32 $sgpr8, killed $sgpr4, 
implicit-def $scc
+    ; MUBUFW64-NEXT: renamable $sgpr4 = S_LSHR_B32 $sgpr32, 6, implicit-def 
dead $scc
+    ; MUBUFW64-NEXT: renamable $sgpr7 = S_ADD_I32 $sgpr4, $sgpr8, implicit-def 
$scc
+    ; MUBUFW64-NEXT: renamable $sgpr7 = S_AND_B32 $sgpr7, 80, implicit-def $scc
     ; MUBUFW64-NEXT: SI_RETURN implicit $sgpr7, implicit $scc
     ;
     ; MUBUFW32-LABEL: name: s_and_b32__sgpr__fi_literal_offset
     ; MUBUFW32: liveins: $sgpr8
     ; MUBUFW32-NEXT: {{  $}}
-    ; MUBUFW32-NEXT: $sgpr4 = S_LSHR_B32 $sgpr32, 5, implicit-def $scc
-    ; MUBUFW32-NEXT: $sgpr4 = S_ADD_I32 killed $sgpr4, 80, implicit-def $scc
-    ; MUBUFW32-NEXT: renamable $sgpr7 = S_AND_B32 $sgpr8, killed $sgpr4, 
implicit-def $scc
+    ; MUBUFW32-NEXT: renamable $sgpr4 = S_LSHR_B32 $sgpr32, 5, implicit-def 
dead $scc
+    ; MUBUFW32-NEXT: renamable $sgpr7 = S_ADD_I32 $sgpr4, $sgpr8, implicit-def 
$scc
+    ; MUBUFW32-NEXT: renamable $sgpr7 = S_AND_B32 $sgpr7, 80, implicit-def $scc
     ; MUBUFW32-NEXT: SI_RETURN implicit $sgpr7, implicit $scc
     ;
     ; FLATSCRW64-LABEL: name: s_and_b32__sgpr__fi_literal_offset
     ; FLATSCRW64: liveins: $sgpr8
     ; FLATSCRW64-NEXT: {{  $}}
-    ; FLATSCRW64-NEXT: $sgpr4 = S_ADD_I32 $sgpr32, 80, implicit-def $scc
-    ; FLATSCRW64-NEXT: renamable $sgpr7 = S_AND_B32 $sgpr8, killed $sgpr4, 
implicit-def $scc
+    ; FLATSCRW64-NEXT: renamable $sgpr7 = S_ADD_I32 $sgpr32, $sgpr8, 
implicit-def $scc
+    ; FLATSCRW64-NEXT: renamable $sgpr7 = S_AND_B32 $sgpr7, 80, implicit-def 
$scc
     ; FLATSCRW64-NEXT: SI_RETURN implicit $sgpr7, implicit $scc
     ;
     ; FLATSCRW32-LABEL: name: s_and_b32__sgpr__fi_literal_offset
     ; FLATSCRW32: liveins: $sgpr8
     ; FLATSCRW32-NEXT: {{  $}}
-    ; FLATSCRW32-NEXT: $sgpr4 = S_ADD_I32 $sgpr32, 80, implicit-def $scc
-    ; FLATSCRW32-NEXT: renamable $sgpr7 = S_AND_B32 $sgpr8, killed $sgpr4, 
implicit-def $scc
+    ; FLATSCRW32-NEXT: renamable $sgpr7 = S_ADD_I32 $sgpr32, $sgpr8, 
implicit-def $scc
----------------
rampitec wrote:

I do not understand this. The transformation is `(s8 & (sp + 80)) ->((s8 + sp) 
& 80)` does not look immediately obvious.

https://github.com/llvm/llvm-project/pull/102345
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