[Bug target/57431] New: ICE in simplify_const_unary_operation vld1_dup_s64/vst1_s64

[Bug target/57431] New: ICE in simplify_const_unary_operation vld1_dup_s64/vst1_s64

[christophe.lyon at st dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57431

            Bug ID: 57431
           Summary: ICE in simplify_const_unary_operation
                    vld1_dup_s64/vst1_s64
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: christophe.lyon at st dot com

Created attachment 30204
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=30204&action=edit
testcase

The attached program makes GCC crash when using -O1, -O2 or -O3. Compiles fine
with -O0.

$ arm-none-linux-gnueabi-gcc -mcpu=cortex-a9 -mfloat-abi=softfp -mfpu=neon -O1
-c myref_vld1_dup.c
myref_vld1_dup.c: In function 'exec_vld1_dup':
myref_vld1_dup.c:16:1: internal compiler error: in
simplify_const_unary_operation, at simplify-rtx.c:1503
 }
 ^
0xa768aa simplify_const_unary_operation(rtx_code, machine_mode, rtx_def*,
machine_mode)
       
/work1/lyon/Work/ARM/Linaro/sources/gcc-fsf/trunk/gcc/simplify-rtx.c:1503
0xa743b4 simplify_unary_operation(rtx_code, machine_mode, rtx_def*,
machine_mode)
       
/work1/lyon/Work/ARM/Linaro/sources/gcc-fsf/trunk/gcc/simplify-rtx.c:791
0xffc467 fold_rtx
        /work1/lyon/Work/ARM/Linaro/sources/gcc-fsf/trunk/gcc/cse.c:3287
0xfff4d0 cse_insn
        /work1/lyon/Work/ARM/Linaro/sources/gcc-fsf/trunk/gcc/cse.c:4573
0x1004e2e cse_extended_basic_block
        /work1/lyon/Work/ARM/Linaro/sources/gcc-fsf/trunk/gcc/cse.c:6405
0x10053ca cse_main
        /work1/lyon/Work/ARM/Linaro/sources/gcc-fsf/trunk/gcc/cse.c:6583
0x10070b1 rest_of_handle_cse
        /work1/lyon/Work/ARM/Linaro/sources/gcc-fsf/trunk/gcc/cse.c:7433

[Bug target/57431] ICE in simplify_const_unary_operation vld1_dup_s64/vst1_s64

[rearnsha at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57431

Richard Earnshaw <rearnsha at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2013-08-02
     Ever confirmed|0                           |1

--- Comment #1 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
Confirmed. 

vld1_dup_[su]64() are degenerate into simple load operations and shouldn't be
using vec_duplicate at all.

[Bug target/57431] ICE in simplify_const_unary_operation vld1_dup_s64/vst1_s64

[rearnsha at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57431

Richard Earnshaw <rearnsha at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED
   Target Milestone|---                         |4.9.0

--- Comment #2 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
Fixed on trunk with:

    PR target/57431
    * arm/neon.md (neon_vld1_dupdi): New expand pattern.
    (neon_vld1_dup<mode> VD iterator): Iterate over VD not VDX.

Committed to trunk as revision r201599.

[Bug target/57431] ICE in simplify_const_unary_operation vld1_dup_s64/vst1_s64

[clyon at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57431

--- Comment #3 from clyon at gcc dot gnu.org ---
Author: clyon
Date: Thu Sep  5 12:31:03 2013
New Revision: 202277

URL: http://gcc.gnu.org/viewcvs?rev=202277&root=gcc&view=rev
Log:
2013-09-05  Christophe Lyon  <christophe.lyon@linaro.org>

    Backport from trunk r201599.
    2013-08-08  Richard Earnshaw  <rearnsha@arm.com>

    PR target/57431
    * arm/neon.md (neon_vld1_dupdi): New expand pattern.
    (neon_vld1_dup<mode> VD iterator): Iterate over VD not VDX.


Modified:
    branches/linaro/gcc-4_8-branch/   (props changed)
    branches/linaro/gcc-4_8-branch/gcc/ChangeLog.linaro
    branches/linaro/gcc-4_8-branch/gcc/config/arm/neon.md

Propchange: branches/linaro/gcc-4_8-branch/
            ('svn:mergeinfo' modified)