https://bugs.llvm.org/show_bug.cgi?id=38708
Bug ID: 38708
Summary: Failure to get rid of `not` in ((1U << bits) - 1U) <
val
Product: libraries
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: Scalar Optimizations
Assignee: unassignedb...@nondot.org
Reporter: lebedev...@gmail.com
CC: llvm-bugs@lists.llvm.org
https://godbolt.org/z/thbdVP
https://rise4fun.com/Alive/XSc
Name: obvious
%o0 = shl i32 -1, %y
%o1 = xor i32 %o0, -1
%r = icmp ult i32 %o1, %x
=>
%n1 = shl i32 1, %y
%r = icmp ule i32 %n1, %x
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