https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106255
Bug ID: 106255 Summary: [suboptinal] llvm uses instructions with larger access bit width Product: gcc Version: 13.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c Assignee: unassigned at gcc dot gnu.org Reporter: zhongyunde at huawei dot com Target Milestone: --- llvm uses memory access instructions with larger access bit width base on following case, both on x86 and arm, see detail https://gcc.godbolt.org/z/c9ja9zWEE ``` #define N 10000 void __attribute__((noipa)) foo_pd (_Complex double* a, _Complex double* b) { for (int i = 0; i != N; i++) a[i] = b[i]; } ```