https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103354
Roger Sayle <roger at nextmovesoftware dot com> changed:
What |Removed |Added
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CC| |roger at nextmovesoftware dot
com
--- Comment #2 from Roger Sayle <roger at nextmovesoftware dot com> ---
Hi Andrew,
I believe this missed-optimization is now implemented, and GCC generates the
same (or equivalent) code for all of:
int h1(int a, int b, int c, int d) {
return (c & -(a==b)) | (d & -(a!=b));
}
int h2(int a, int b, int c, int d) {
return (a==b) ? c : d;
}
int h3(int a, int b, int c, int d) {
int t1 = a==b ? c : 0;
int t2 = a==b ? 0 : d;
return t1 | t2;
}
int h4(int a, int b, int c, int d) {
int t1 = a==b ? c : 0;
int t2 = a!=b ? d : 0;
return t1 | t2;
}
If you agree we can close this PR. I don't think this needs a new test case in
the testsuite, but I'll leave that up to you.
