http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53144
Paolo Bonzini <bonzini at gnu dot org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Last reconfirmed| |2012-04-28 Known to work| |4.4.6 Summary|[4.8 Regression] |[4.7/4.8 Regression] PPRE |gcc.c-torture/execute/vecto |infinite loop |r-compare-1.c | Ever Confirmed|0 |1 Known to fail| |4.7.0, 4.8.0 --- Comment #3 from Paolo Bonzini <bonzini at gnu dot org> 2012-04-28 15:46:26 UTC --- The minimal testcase fails on 4.7 too. PPRE is going through an infinite loop. typedef unsigned char __attribute__((vector_size(4))) uvec; int main (int argc, char *argv[]) { int i; int x = 0; uvec uc0 = (uvec) {argc, 1, 2, 10}; unsigned char uc1[4] = {0, 3, 2, 200}; signed char ucg[4] = {1, 0, 0, 0 }; signed char ucl[4] = {0, 1, 0, 1 }; #define uc0_ ((unsigned char *)&uc0) for (i = 0; i < 4; i ++) { x |= ucg[i] != (uc0_[i] > uc1[i]); x |= ucl[i] != (uc0_[i] < uc1[i]); } return x; } H.J., can you try bisecting this?