[Bug target/68674] ARM/AARCH64 attribute target neon internal compiler error: in copy_to_mode_reg, at explow.c:595

["chrbr at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68674

chrbr at gcc dot gnu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Target|arm                         |arm,aarch64
           Assignee|chrbr at gcc dot gnu.org           |unassigned at gcc dot gnu.org
            Summary|ARM attribute target neon   |ARM/AARCH64 attribute
                   |internal compiler error: in |target neon internal
                   |copy_to_mode_reg, at        |compiler error: in
                   |explow.c:595                |copy_to_mode_reg, at
                   |                            |explow.c:595

--- Comment #6 from chrbr at gcc dot gnu.org ---
This test also ICEs for aarch64 the same way

-----------------------------------------
#include <arm_neon.h>

int8x8_t a, b;
int16x8_t e;

void
__attribute__ ((target("+simd")))
foo(void)
{
  e = (int16x8_t) vaddl_s8(a, b);
}
-----------------------------------------
internal compiler error: in copy_to_mode_reg, at explow.c:595
   return (int16x8_t) __builtin_aarch64_saddlv8qi (__a, __b);

called with:

cc1 -quiet pr68674.c  -mcpu=cortex-a53+nosimd -O2

The reason is that DECL_MODE is been initialized to a scalar during layout_decl
since TARGET_SIMD is not set during the global initialization.