[Bug c/19858] New: ICE on simple SSE code (works in gcc 3.3)

[Bug c/19858] New: ICE on simple SSE code (works in gcc 3.3)

[gcc-bugzilla at gcc dot gnu dot org]

The code below, when compiled by "gcc -O3 -msse", gives the following
error (same code compiles fine in gcc 3.3.5):

bug2.c: In function 'main':
bug2.c:17: error: Invalid reference prefix.
&fooD.1292;

bug2.c:17: internal compiler error: verify_stmts failed.
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.

Environment:
System: Linux fftw.org 2.6.3-1-686-smp #2 SMP Tue Feb 24 20:29:08 EST 2004 i686 GNU/Linux
Architecture: i686

	
host: i686-pc-linux-gnu
build: i686-pc-linux-gnu
target: i686-pc-linux-gnu
configured with: ../configure --prefix=/home/stevenj/gcc4

How-To-Repeat:

Compile the following code with 'gcc -O3 -msse -o bug2 bug2.c'

typedef float V __attribute__ ((vector_size (16)));
union fvec {
     float f[4];
     V v;
};

typedef unsigned int uintptr_t;
#define ALIGNMENT 8
#define TAINT_BIT 1
#define PTRINT(p) ((uintptr_t)(p))
#define ALIGNED(p) \
  (((PTRINT(p) % ALIGNMENT) == 0) && !(PTRINT(p) & TAINT_BIT))

const union fvec foo = {{-0.0, 0.0, -0.0, 0.0}};

int main(void)
{
     return !ALIGNED(&foo);
}

-- 
           Summary: ICE on simple SSE code (works in gcc 3.3)
           Product: gcc
           Version: 4.0.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: stevenj at fftw dot org
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: i686-pc-linux-gnu
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19858

[Bug middle-end/19858] [4.0 Regression] ICE on simple SSE code (works in gcc 3.3)

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-02-09 19:35 -------
Confirmed, this is werid, what are the sematics of BIT_FIELD_REF.
Here is the reduced testcase:
union fvec { };
typedef __SIZE_TYPE__ uintptr_t;
union fvec foo;
int main(void)
{
     return !(((((uintptr_t)(&foo)) & 3 ) == 0) && !(((uintptr_t)(&foo)) & 1));
}


-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
          Component|c                           |middle-end
     Ever Confirmed|                            |1
           Keywords|                            |ice-on-valid-code
   Last reconfirmed|0000-00-00 00:00:00         |2005-02-09 19:35:38
               date|                            |
            Summary|ICE on simple SSE code      |[4.0 Regression] ICE on
                   |(works in gcc 3.3)          |simple SSE code (works in
                   |                            |gcc 3.3)
   Target Milestone|---                         |4.0.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19858

[Bug middle-end/19858] [4.0 Regression] ICE on simple SSE code

[jakub at gcc dot gnu dot org]

------- Additional Comments From jakub at gcc dot gnu dot org  2005-02-11 09:59 -------
Patch here: <http://gcc.gnu.org/ml/gcc-patches/2005-02/msg00450.html>

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|ssemmx                      |patch


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19858

[Bug middle-end/19858] [4.0 Regression] ICE on simple SSE code

[cvs-commit at gcc dot gnu dot org]

------- Additional Comments From cvs-commit at gcc dot gnu dot org  2005-02-11 21:08 -------
Subject: Bug 19858

CVSROOT:	/cvs/gcc
Module name:	gcc
Changes by:	jakub@gcc.gnu.org	2005-02-11 21:08:44

Modified files:
	gcc            : ChangeLog fold-const.c 
	gcc/testsuite  : ChangeLog 
Added files:
	gcc/testsuite/gcc.c-torture/compile: 20050210-1.c 

Log message:
	PR middle-end/19858
	* fold-const.c (make_bit_field_ref): If bitpos == 0 and bitsize
	is number of inner's bits, avoid creating a BIT_FIELD_REF.
	
	* gcc.c-torture/compile/20050210-1.c: New test.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.7449&r2=2.7450
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/fold-const.c.diff?cvsroot=gcc&r1=1.504&r2=1.505
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/ChangeLog.diff?cvsroot=gcc&r1=1.5017&r2=1.5018
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/gcc.c-torture/compile/20050210-1.c.diff?cvsroot=gcc&r1=NONE&r2=1.1



-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19858

[Bug middle-end/19858] [4.0 Regression] ICE on simple SSE code

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-02-11 21:16 -------
Fixed.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19858

[Bug middle-end/19858] [4.0 Regression] ICE on simple SSE code

[jakub at gcc dot gnu dot org]

-- 
Bug 19858 depends on bug 19857, which changed state.

Bug 19857 Summary: [4.0 Regression] alignment check of SSE constant fails in simple test program
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19857

           What    |Old Value                   |New Value
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19858