https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96669
Bug ID: 96669
Summary: Failure to optimize left shift+and to test for 0
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: gabravier at gmail dot com
Target Milestone: ---
int f(int x)
{
return (1 << x) & 1;
}
This can be converted to `return x == 0;`. This transformation is done by LLVM,
but not by GCC.
