[PATCH] D125041: [GlobalISel] Combine G_SHL, G_ASHR, G_SHL of undef shifts to undef.

[Matt Arsenault via Phabricator via llvm-commits]

arsenm added inline comments.


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Comment at: llvm/test/CodeGen/AArch64/GlobalISel/prelegalizercombiner-undef.mir:60
     ; CHECK: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 0
-    ; CHECK: $w0 = COPY [[C]](s32)
-    ; CHECK: RET_ReallyLR implicit $w0
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Should pre-regenerate these checks to include -NEXT


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Comment at: llvm/test/CodeGen/AArch64/GlobalISel/prelegalizercombiner-undef.mir:281
+
+...
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Should also test undef lhs?


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D125041/new/

https://reviews.llvm.org/D125041