https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103220
Bug ID: 103220
Summary: missed casting issue with |/&?
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Keywords: missed-optimization, TREE
Severity: enhancement
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: pinskia at gcc dot gnu.org
Target Milestone: ---
Take:
signed char f(unsigned char a)
{
unsigned char b = a & 127;
signed char c = (signed char) b;
signed char d = (signed char) a;
signed char e = d & -128;
signed char h = c | e;
return h;
}
---- CUT ----
GCC can optimize this at the RTL level to just return a but misses out at the
gimple level.
Found this while working on PR 103216.
