https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106243
Bug ID: 106243 Summary: Failure to optimize (0 - x) & 1 on vector type Product: gcc Version: 13.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: tree-optimization Assignee: unassigned at gcc dot gnu.org Reporter: gabravier at gmail dot com Target Milestone: --- #include <stdint.h> typedef int64_t v2i64 __attribute__((vector_size(16))); v2i64 f(v2i64 x) { return (0 - x) & 1; } This can be optimized to `return x & 1;`. LLVM does this transformation, but GCC does not