[Bug target/39241] New: [4.4 Regression] ICE in subreg_get_info, at rtlanal.c:3104

[Bug target/39241] New: [4.4 Regression] ICE in subreg_get_info, at rtlanal.c:3104

[rguenth at gcc dot gnu dot org]

ICEs with -O[123s], likely due to the VIEW_CONVERT_EXPR we construct from
*((int*)&f) after inlining.

struct FTprocCompressor {
    float * _amp;
    float * _env;
    float * _as;
};
static inline int f_round(float f)
{
  return *((int*)&f) - 0x4b400000;
}
void process (struct FTprocCompressor *_this, float *attack, float *release,
              float *data, unsigned int fftn)
{
  float ga;
  float gr;
  float att, rel;
  int fftN2 = (fftn+1) >> 1;
  int i;
  for (i = 0; i < fftN2-1; i++)
    {
      att =
((attack[i])<(0.002f)?(0.002f):((attack[i])>(1.0f)?(1.0f):(attack[i])));
      rel =
((release[i])<(att)?(att):((release[i])>(1.0f)?(1.0f):(release[i])));
      ga = _this->_as[f_round(att * (float)(256 -1))];
      gr = _this->_as[f_round(rel * (float)(256 -1))];
      if (_this->_amp[i] > _this->_env[i])
        {
          _this->_env[i] = _this->_env[i] * ga + _this->_amp[i] * (1.0f - ga);
          _this->_env[i] = _this->_env[i] * gr + _this->_amp[i] * (1.0f - gr);
        }
    }
}


-- 
           Summary: [4.4 Regression] ICE in subreg_get_info, at
                    rtlanal.c:3104
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: rguenth at gcc dot gnu dot org
GCC target triplet: i?86-*-*


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39241

[Bug target/39241] [4.4 Regression] ICE in subreg_get_info, at rtlanal.c:3104

[rguenth at gcc dot gnu dot org]

-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |4.4.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39241

[Bug target/39241] [4.4 Regression] ICE in subreg_get_info, at rtlanal.c:3104

[jakub at gcc dot gnu dot org]

------- Comment #1 from jakub at gcc dot gnu dot org  2009-02-19 13:16 -------
Reduced testcase:
static inline int
foo (float f)
{
  return *((int *) &f) - 1;
}

float
bar (float x, float y, float *z)
{
  float c = y < 0.002f ? 0.002f : y;
  float d = x < c ? c : x;
  return z[foo (c)] + z[foo (d * 255.0f)];
}


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39241

[Bug target/39241] [4.4 Regression] ICE in subreg_get_info, at rtlanal.c:3104

[hjl dot tools at gmail dot com]

------- Comment #2 from hjl dot tools at gmail dot com  2009-02-19 15:44 -------
It is caused by revision 138804:

http://gcc.gnu.org/ml/gcc-cvs/2008-08/msg00363.html


-- 

hjl dot tools at gmail dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jsm28 at gcc dot gnu dot org
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2009-02-19 15:44:25
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39241

[Bug rtl-optimization/39241] [4.4 Regression] ICE in subreg_get_info, at rtlanal.c:3104

[hjl dot tools at gmail dot com]

------- Comment #3 from hjl dot tools at gmail dot com  2009-02-20 01:21 -------
A patch is posted at

http://gcc.gnu.org/ml/gcc-patches/2009-02/msg00937.html


-- 

hjl dot tools at gmail dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                URL|                            |http://gcc.gnu.org/ml/gcc-
                   |                            |patches/2009-
                   |                            |02/msg00937.html
          Component|target                      |rtl-optimization


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39241

[Bug rtl-optimization/39241] [4.4 Regression] ICE in subreg_get_info, at rtlanal.c:3104

[hjl dot tools at gmail dot com]

------- Comment #4 from hjl dot tools at gmail dot com  2009-02-20 01:58 -------
The updated patch is at

http://gcc.gnu.org/ml/gcc-patches/2009-02/msg00939.html


-- 

hjl dot tools at gmail dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                URL|http://gcc.gnu.org/ml/gcc-  |http://gcc.gnu.org/ml/gcc-
                   |patches/2009-               |patches/2009-
                   |02/msg00937.html            |02/msg00939.html


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39241

[Bug rtl-optimization/39241] [4.4 Regression] ICE in subreg_get_info, at rtlanal.c:3104

[hjl dot tools at gmail dot com]

------- Comment #5 from hjl dot tools at gmail dot com  2009-02-20 17:14 -------
A new patch is at

http://gcc.gnu.org/ml/gcc-patches/2009-02/msg00961.html


-- 

hjl dot tools at gmail dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                URL|http://gcc.gnu.org/ml/gcc-  |http://gcc.gnu.org/ml/gcc-
                   |patches/2009-               |patches/2009-
                   |02/msg00939.html            |02/msg00961.html


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39241

[Bug rtl-optimization/39241] [4.4 Regression] ICE in subreg_get_info, at rtlanal.c:3104

[rguenth at gcc dot gnu dot org]

-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P3                          |P1


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39241

[Bug rtl-optimization/39241] [4.4 Regression] ICE in subreg_get_info, at rtlanal.c:3104

[hjl dot tools at gmail dot com]

------- Comment #6 from hjl dot tools at gmail dot com  2009-02-25 15:52 -------
An updated patch is at

http://gcc.gnu.org/ml/gcc-patches/2009-02/msg01171.html


-- 

hjl dot tools at gmail dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                URL|http://gcc.gnu.org/ml/gcc-  |http://gcc.gnu.org/ml/gcc-
                   |patches/2009-               |patches/2009-
                   |02/msg00961.html            |02/msg01171.html


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39241

[Bug rtl-optimization/39241] [4.4 Regression] ICE in subreg_get_info, at rtlanal.c:3104

[hjl at gcc dot gnu dot org]

------- Comment #7 from hjl at gcc dot gnu dot org  2009-02-25 18:49 -------
Subject: Bug 39241

Author: hjl
Date: Wed Feb 25 18:49:28 2009
New Revision: 144430

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=144430
Log:
gcc/

2008-02-25  H.J. Lu  <hongjiu.lu@intel.com>

        PR rtl-optimization/39241
        * jump.c (rtx_renumbered_equal_p): Remove 2 superfluous calls
        to subreg_offset_representable_p.

gcc/testsuite/

2008-02-25  H.J. Lu  <hongjiu.lu@intel.com>

        PR rtl-optimization/39241
        * gcc.dg/torture/pr39241.c: New.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr39241.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/jump.c
    trunk/gcc/testsuite/ChangeLog


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39241

[Bug rtl-optimization/39241] [4.4 Regression] ICE in subreg_get_info, at rtlanal.c:3104

[hjl dot tools at gmail dot com]

------- Comment #9 from hjl dot tools at gmail dot com  2009-02-25 18:55 -------
Fixed.


-- 

hjl dot tools at gmail dot com changed:

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39241

[Bug rtl-optimization/39241] [4.4 Regression] ICE in subreg_get_info, at rtlanal.c:3104

[hjl at gcc dot gnu dot org]

------- Comment #8 from hjl at gcc dot gnu dot org  2009-02-25 18:55 -------
Subject: Bug 39241

Author: hjl
Date: Wed Feb 25 18:55:14 2009
New Revision: 144431

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=144431
Log:
2009-02-25  H.J. Lu  <hongjiu.lu@intel.com>

        Backport from mainline:
        2008-02-25  H.J. Lu  <hongjiu.lu@intel.com>

        PR rtl-optimization/39241
        * gcc.dg/torture/pr39241.c: New.

Added:
    branches/gcc-4_3-branch/gcc/testsuite/gcc.dg/torture/pr39241.c
      - copied unchanged from r144430,
trunk/gcc/testsuite/gcc.dg/torture/pr39241.c
Modified:
    branches/gcc-4_3-branch/gcc/testsuite/ChangeLog


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39241