https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89972
Jakub Jelinek <jakub at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Keywords| |ABI CC| |andi-gcc at firstfloor dot org, | |hjl.tools at gmail dot com, | |hubicka at gcc dot gnu.org, | |jakub at gcc dot gnu.org --- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Guess this is primarily an ABI issue, whether such arguments shouldn't be passed at all even if they have the extra alignments or not. On: struct S { long a[0] __attribute__ ((aligned (32))); }; void bar (long double, struct S, long double); void foo (void) { struct S b; bar (8.0L, b, 9.0L); } clang doesn't agree with icc, clang passes 8.0L at rsp and 9.0 at rsp+16, while icc at rsp and rsp+32 (and gcc ICEs).