[llvm-bugs] [Bug 38021] [ValueTracking] try harder to find 'nuw'
via llvm-bugs
llvm-bugs at lists.llvm.org
Mon Aug 16 05:00:55 PDT 2021
https://bugs.llvm.org/show_bug.cgi?id=38021
Simon Pilgrim <llvm-dev at redking.me.uk> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #1 from Simon Pilgrim <llvm-dev at redking.me.uk> ---
Fixed in trunk - test case added at a7dc71130ffb41195e2efac2221692875144c18f
define i8 @no_overflow(i8 %x) {
%clear_top_3_bits = lshr i8 %x, 3
%add = add nuw nsw i8 %clear_top_3_bits, -63
ret i8 %add
}
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