optimization/6842: internal compiler error using MMX intrinsics with optimization

[gert.vervoort@philips.com]

>Number:         6842
>Category:       optimization
>Synopsis:       internal compiler error using MMX intrinsics with optimization
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          ice-on-legal-code
>Submitter-Id:   net
>Arrival-Date:   Mon May 27 23:26:01 PDT 2002
>Closed-Date:
>Last-Modified:
>Originator:     gert.vervoort@philips.com
>Release:        gcc 3.1
>Organization:
>Environment:
vervoort@linux22 [67] > uname -a
Linux linux22 2.4.18 #2 SMP Fri Apr 19 16:21:16 CEST 2002 i686 unknown
vervoort@linux22 [68] > /cadappl/gcc/3.1/bin/gcc -v
Reading specs from /cadappl/gcc/3.1/lib/gcc-lib/i686-pc-linux-gnu/3.1/specs
Configured with: /home/hooft/Level/Work/gcc/gcc-3.1/gcc-3.1/configure --prefix=/cadappl/gcc/3.1 --enable-shared --enable-languages=c,c++,f77
Thread model: single
gcc version 3.1
>Description:
gcc 3.1 gives an internal compiler error when compiling
a file with an MMX intrinsic with optimization on.
Without optimization the file compiles oke.
>How-To-Repeat:
vervoort@linux22 [69] > /cadappl/gcc/3.1/bin/gcc -mmmx  intrinsic_mmx_add3.c   
vervoort@linux22 [70] > /cadappl/gcc/3.1/bin/gcc -mmmx -O1  intrinsic_mmx_add3 
intrinsic_mmx_add3.c: In function `main':
intrinsic_mmx_add3.c:15: Internal compiler error in simplify_gen_subreg, at simplify-rtx.c:2711
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://www.gnu.org/software/gcc/bugs.html> for instructions.
>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted:
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