https://bugs.llvm.org/show_bug.cgi?id=47061
Bug ID: 47061
Summary: Failure to optimize bit magic to xor+and
Product: libraries
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: Scalar Optimizations
Assignee: unassignedb...@nondot.org
Reporter: gabrav...@gmail.com
CC: llvm-bugs@lists.llvm.org
int f(int a, int b, int c)
{
return (a && !b && c) || (!a && b && c);
}
This can be optimized to `((bool)a ^ (bool)b) & (bool)c`. This transformation
is done by GCC, but not by LLVM.
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