[PATCH] D155622: [X86] Recognize standalone `(1 << nbits) - 1` pattern as bzhi

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon added inline comments.


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Comment at: llvm/test/CodeGen/AArch64/extract-lowbits.ll:24
 ; CHECK:       // %bb.0:
-; CHECK-NEXT:    mov w8, #1
+; CHECK-NEXT:    mov w8, #1 // =0x1
 ; CHECK-NEXT:    lsl w8, w8, w1
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This is a X86 patch - skip the aarch64 regeneration changes (or commit separately) 


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D155622/new/

https://reviews.llvm.org/D155622