https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111779
Bug ID: 111779 Summary: Fail to vectorize the struct include struct Product: gcc Version: 14.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c Assignee: unassigned at gcc dot gnu.org Reporter: juzhe.zhong at rivai dot ai Target Milestone: --- #include <stdbool.h> #include <assert.h> struct C { int c; int d; bool f :1; float e; }; struct A { unsigned int a; unsigned char c1, c2; bool b1 : 1; bool b2 : 1; bool b3 : 1; struct C b4; }; void foo (const struct A * __restrict x, int y) { int s = 0, i = 0; for (i = 0; i < y; ++i) { const struct A a = x[i]; s += a.b4.f ? 1 : 0; } assert (s == 0); //__builtin_abort (); } int main () { struct A x[100]; int i; __builtin_memset (x, -1, sizeof (x)); for (i = 0; i < 100; i++) { x[i].b1 = false; x[i].b2 = false; x[i].b3 = false; x[i].b4.f = false; } foo (x, 100); return 0; } https://godbolt.org/z/KWb7c1n5h Both SVE GCC and RVV GCC failed to vectorize it. But Clang succeed on vectorization.