https://bugs.llvm.org/show_bug.cgi?id=47857
Bug ID: 47857
Summary: Remove mov before sbb reg, reg
Product: libraries
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: Backend: X86
Assignee: unassignedb...@nondot.org
Reporter: david.bolvan...@gmail.com
CC: craig.top...@gmail.com, llvm-bugs@lists.llvm.org,
llvm-...@redking.me.uk, pengfei.w...@intel.com,
spatel+l...@rotateright.com
As shown here:
https://godbolt.org/z/Tfzj6n
It should be possible to remove mov before sbb with same operands.
..
mov esi, 0
sbb rsi, rsi
and esi, 38
add r9, rsi
...
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