Hi! The test uses __int128_t, so won't work on targets that don't support it. Fixed thusly, tested on x86_64-linux -m32/-m64, committed to trunk as obvious.
2020-01-30 Jakub Jelinek <ja...@redhat.com> PR tree-optimization/92706 * gcc.dg/tree-ssa/pr92706-1.c: Require int128 effective target. --- gcc/testsuite/gcc.dg/tree-ssa/pr92706-1.c.jj 2020-01-29 16:07:14.086507987 +0100 +++ gcc/testsuite/gcc.dg/tree-ssa/pr92706-1.c 2020-01-30 01:00:12.344450000 +0100 @@ -1,4 +1,4 @@ -/* { dg-do compile } */ +/* { dg-do compile { target int128 } } */ /* { dg-options "-O2 -fdump-tree-esra-details" } */ struct S { int i[4]; } __attribute__((aligned(128))); Jakub