[llvm-bugs] [Bug 34046] [InstCombine] Failure to simplify IR to allow recognition of i8 and i16 rotation patterns
via llvm-bugs
llvm-bugs at lists.llvm.org
Mon Aug 14 09:10:36 PDT 2017
https://bugs.llvm.org/show_bug.cgi?id=34046
Sanjay Patel <spatel+llvm at rotateright.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |FIXED
Status|NEW |RESOLVED
--- Comment #10 from Sanjay Patel <spatel+llvm at rotateright.com> ---
After https://reviews.llvm.org/rL310849:
_rotate16: ## @rotate16
movl %esi, %ecx
rolw %cl, %di
movzwl %di, %eax
retq
_rotate8: ## @rotate8
movl %esi, %ecx
rolb %cl, %dil
movzbl %dil, %eax
retq
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