[Bug tree-optimization/94921] New: Failure to optimize nots with sub into single add
gabravier at gmail dot com
gcc-bugzilla@gcc.gnu.org
Sat May 2 12:39:08 GMT 2020
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94921
Bug ID: 94921
Summary: Failure to optimize nots with sub into single add
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, int y)
{
return ~(~x - y);
}
This can be optimized to `x - y`. This transformation is done by LLVM, but not
by GCC
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