[Bug target/53233] New: ICE in extract_insn, at recog.c:2103

[Bug target/53233] New: ICE in extract_insn, at recog.c:2103

[gseanmcg at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53233

             Bug #: 53233
           Summary: ICE in extract_insn, at recog.c:2103
    Classification: Unclassified
           Product: gcc
           Version: 4.5.3
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: gseanmcg@gmail.com


The following error occurs when attempting to compile LibAV
(http://www.libav.org) with -mcpu=power7 on gcc 4.5.3:

/home/mik/src/fate/src/libavcodec/ppc/float_altivec.c: In function
'vector_fmul_window_altivec':
/home/mik/src/fate/src/libavcodec/ppc/float_altivec.c:123:1: error:
unrecognizable insn:
(insn 65 64 66 5 /home/mik/src/fate/src/libavcodec/ppc/float_altivec.c:115 (set
(reg/v:V4SF 156 [ t0 ])
        (neg:V4SF (minus:V4SF (mult:V4SF (reg/v:V4SF 153 [ s1 ])
                    (reg/v:V4SF 149 [ wi ]))
                (reg/v:V4SF 155 [ t0 ])))) -1 (nil))
/home/mik/src/fate/src/libavcodec/ppc/float_altivec.c:123:1: internal compiler
error: in extract_insn, at recog.c:2103
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

No ICE is present on 4.6.3 or 4.7.0 with the same options.

[Bug target/53233] ICE in extract_insn, at recog.c:2103

[gseanmcg at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53233

--- Comment #1 from Sean McGovern <gseanmcg at gmail dot com> 2012-05-04 19:00:05 UTC ---
The code in question (with line numbers):

  93 static void vector_fmul_window_altivec(float *dst, const float *src0,
const float *src1, const float *win, int len)

  94 {

  95     vector float zero, t0, t1, s0, s1, wi, wj;

  96     const vector unsigned char reverse = vcprm(3,2,1,0);

  97     int i,j;

  98 

  99     dst += len;

 100     win += len;

 101     src0+= len;

 102 

 103     zero = (vector float)vec_splat_u32(0);

 104 

 105     for(i=-len*4, j=len*4-16; i<0; i+=16, j-=16) {

 106         s0 = vec_ld(i, src0);

 107         s1 = vec_ld(j, src1);

 108         wi = vec_ld(i, win);

 109         wj = vec_ld(j, win);

 110 

 111         s1 = vec_perm(s1, s1, reverse);

 112         wj = vec_perm(wj, wj, reverse);

 113 

 114         t0 = vec_madd(s0, wj, zero);

 115         t0 = vec_nmsub(s1, wi, t0);

 116         t1 = vec_madd(s0, wi, zero);

 117         t1 = vec_madd(s1, wj, t1);

 118         t1 = vec_perm(t1, t1, reverse);

 119 

 120         vec_st(t0, i, dst);

 121         vec_st(t1, j, dst);

 122     }

 123 }

[Bug target/53233] ICE in extract_insn, at recog.c:2103

[gseanmcg at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53233

Sean McGovern <gseanmcg at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |WONTFIX

--- Comment #2 from Sean McGovern <gseanmcg at gmail dot com> 2012-07-31 17:47:21 UTC ---
Closing as WONTFIX, since the 4.5 tree is now closed.