https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96563
Bug ID: 96563 Summary: Failure to optimize loop with condition to simple arithmetic 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 i = 0; while (i <= 9) { if (i == x) return 8; ++i; } return 4; } This can be optimized to `return 4 + ((x <= 9) * 4);`. This transformation is done by LLVM, but not by GCC.