[Bug target/68895] New: [ARM] ICE with target attributes

[clyon at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68895

            Bug ID: 68895
           Summary: [ARM] ICE with target attributes
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: chrbr at gcc dot gnu.org
          Reporter: clyon at gcc dot gnu.org
  Target Milestone: ---
            Target: arm

Hi,

While modifying some tests to update my testsuite cleanup proposal around
target attributes testing
(https://gcc.gnu.org/ml/gcc-patches/2015-11/msg03356.html), I am facing an ICE.

I've modified attr-neon2.c like that:
======================================
/* { dg-do compile } */
/* { dg-require-effective-target arm_neon_ok } */
/* { dg-require-effective-target arm_fp_ok } */
/* { dg-options "-O2" } */
/* { dg-add-options arm_fp } */

/* Reset fpu to a value compatible with the next pragmas.  */
#pragma GCC target ("fpu=vfp")
#pragma GCC push_options

#pragma GCC target ("fpu=neon")
#include <arm_neon.h>

/* Check that pragma target is used.  */
int8x8_t
my (int8x8_t __a, int8x8_t __b)
{
  return __a + __b;
}

#pragma GCC pop_options

/* Check that command line option is restored.  */
int8x8_t
my1 (int8x8_t __a, int8x8_t __b)
{
  return __a + __b;
}

/* { dg-final { scan-assembler-times "\.fpu vfp" 1 } } */
/* { dg-final { scan-assembler-times "\.fpu neon" 1 } } */
/* { dg-final { scan-assembler "vadd" } } */
==============================================

That is, I added:
#pragma GCC target ("fpu=vfp")
#pragma GCC push_options

at the beginning, and I replaced reset_options with pop_options.


I am now seeing:
spawn
/home/christophe.lyon/src/GCC/builds/gcc-fsf-arm-attribs/obj-arm-none-linux-gnueabihf/gcc3/gcc/xgcc
-B/home/christophe.lyon/src/GCC/builds/gcc-fsf-arm-attribs/obj-arm-none-linux-gnueabihf/gcc3/gcc/
/home/christophe.lyon/src/GCC/sources/gcc-fsf/arm-attribs/gcc/testsuite/gcc.target/arm/attr-neon2.c
-fno-diagnos\
tics-show-caret -fdiagnostics-color=never -O2 -ffat-lto-objects
-DSTACK_SIZE=16384 -S -o attr-neon2.s^M
/home/christophe.lyon/src/GCC/sources/gcc-fsf/arm-attribs/gcc/testsuite/gcc.target/arm/attr-neon2.c:
In function 'my':^M
/home/christophe.lyon/src/GCC/sources/gcc-fsf/arm-attribs/gcc/testsuite/gcc.target/arm/attr-neon2.c:16:1:
internal compiler error: in set_rtl, at cfgexpand.c:215^M
0x82badb set_rtl^M
       
/home/christophe.lyon/src/GCC/sources/gcc-fsf/arm-attribs/gcc/cfgexpand.c:209^M
0x82edc4 set_parm_rtl(tree_node*, rtx_def*)^M
       
/home/christophe.lyon/src/GCC/sources/gcc-fsf/arm-attribs/gcc/cfgexpand.c:1259^M
0x9ebe67 assign_parm_setup_reg^M
       
/home/christophe.lyon/src/GCC/sources/gcc-fsf/arm-attribs/gcc/function.c:3339^M
0x9ed675 assign_parms^M
       
/home/christophe.lyon/src/GCC/sources/gcc-fsf/arm-attribs/gcc/function.c:3766^M
0x9f17af expand_function_start(tree_node*)^M
       
/home/christophe.lyon/src/GCC/sources/gcc-fsf/arm-attribs/gcc/function.c:5200^M
0x83f0ce execute^M
       
/home/christophe.lyon/src/GCC/sources/gcc-fsf/arm-attribs/gcc/cfgexpand.c:6210^M
Please submit a full bug report,^M


My GCC was configured with: --target=arm-none-linux-gnueabihf --with-float=hard
--with-mode=arm --with-cpu=cortex-a9 --with-fpu=neon