[PATCH] D77530: [AArch64][GlobalISel] Generalize logic for subregister copies

[Jessica Paquette via Phabricator via llvm-commits]

paquette added inline comments.


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Comment at: llvm/test/CodeGen/AArch64/GlobalISel/opt-fold-ext-tbz-tbnz.mir:80
   ; CHECK:   liveins: $h0
-  ; CHECK:   [[SUBREG_TO_REG:%[0-9]+]]:fpr32 = SUBREG_TO_REG 0, $h0, %subreg.hsub
-  ; CHECK:   %copy:gpr32 = COPY [[SUBREG_TO_REG]]
+  ; CHECK:   %copy:gpr32 = COPY $h0
   ; CHECK:   TBNZW %copy, 3, %bb.1
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I don't think this COPY is legal. This is a cross-bank copy from a 16-bit FPR onto a 32-bit GPR.

I think that we need a SUBREG_TO_REG here.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D77530/new/

https://reviews.llvm.org/D77530