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Article #1362

yet another gcc-2.3.1 -msoft-float -O2 bug

#1362
From: marvinw
Date: Wed, 11 Nov 1992 19:51
76 lines
3569 bytes
There is a small C program included below which produces the problem.  The
compiler is aborting.

		Marvin Wyckoff
		Tektronix, Inc.
		503-685-2985
		marvinw@orca.wv.tek.com

---------------------------------------------------------------------------
Script started on Wed Nov 11 11:48:26 1992

[ent] cat config.status
#!/bin/sh
# GCC was configured as follows:
../configure --host=mips --target=mips-mips-bsd
echo host=mips-mips-none target=mips-mips-bsd build=mips-mips-none
[ent] uname -a
enterprise enterprise 5.0 RISCos mips
[ent] cat bug5.c
static int _CreateMHLut(hshape, param1, param2 )
int hshape;
float param1;
float param2;
{
    unsigned status;
    unsigned i,j,k;			 
    unsigned long *hist_ptr, *h_ptr;	 
    unsigned long hist_cnt;		 
    double fmax, prev_err, err;		 
    unsigned long total_pixels;		 
    float *src_pd_base, *src_pd;	 
    float *src_cdf_base, *src_cdf;	 
    float *src_map_base, *src_map;	 
    float *dst_cdf_base, *dst_cdf;	 
    unsigned long *remap_base, *remap;	 
    for( i = 0; i < hist_cnt; i++ )
	*src_pd++ = (float)(*h_ptr++) / (float)total_pixels;
    src_pd  = (float *)src_pd_base;
    src_cdf = (float *)src_cdf_base;
    *(int *)src_cdf++ = *(int *)src_pd++;
    for( i = 1; i < hist_cnt; i++, src_cdf++ )
	*src_cdf = *(src_cdf-1) + *src_pd++;
    src_cdf = (float *)src_cdf_base;
    fmax = (float) (hist_cnt - 1);		 
	remap = remap_base;
	for( k = 0, i= 0; i < hist_cnt; i++, src_cdf++ )
	    {
	    for( prev_err = 1.0,j = k; j < hist_cnt; j++ )
		{
		err = (( (double)(((float)j / fmax) - *src_cdf)) > 0.0 ? ( (double)(((float)j / fmax) - *src_cdf)) : -( (double)(((float)j / fmax) - *src_cdf)))	;
		if( err == 0.0 )
		    {
		    j++;
		    break;
		    }
		else if( err > prev_err )
		    break;
		else
		    prev_err = err;
		}
	    *remap++ = j - 1;
	    k = j - 1;				     
	    }
}
[ent] /big1/people/marvinw/nwd/tools/mips/bin/mgcc -msoft-float -O2 -v -c bug5.c
gcc version 2.3.1
 /big1/people/marvinw/nwd/tools/mips/lib/gcc-lib/mips-mips-bsd/2.3.1/cpp -lang-c -v -undef -D__GNUC__=2 -Dmips -Dunix -Dhost_mips -DMIPSEB -DR3000 -DSYSTYPE_BSD43 -D_mips -D_unix -D_host_mips -D_MIPSEB -D_R3000 -D_SYSTYPE_BSD43 -D__mips__ -D__unix__ -D__host_mips__ -D__MIPSEB__ -D__R3000__ -D__SYSTYPE_BSD43__ -D___mips__ -D___unix__ -D___host_mips__ -D___MIPSEB__ -D___R3000__ -D___SYSTYPE_BSD43__ -D__mips -D__unix -D__host_mips -D__MIPSEB -D__R3000 -D__SYSTYPE_BSD43 -D___mips -D___unix -D___host_mips -D___




MIPSEB -D___R3000 -D___SYSTYPE_BSD43 -D__OPTIMIZE__ -D__LANGUAGE_C -D_LANGUAGE_C -DLANGUAGE_C bug5.c /usr/tmp/cc019444.i
GNU CPP version 2.3.1 [AL 1.1, MM 28] RISC-OS BSD Mips
 /big1/people/marvinw/nwd/tools/mips/lib/gcc-lib/mips-mips-bsd/2.3.1/cc1 /usr/tmp/cc019444.i -mgpopt -quiet -dumpbase bug5.c -msoft-float -O2 -version -o /usr/tmp/cc019444.s
GNU C version 2.3.1 [AL 1.1, MM 28] RISC-OS BSD Mips compiled by CC.
/big1/people/marvinw/nwd/tools/mips/bin/mgcc: Internal compiler error: program cc1 got fatal signal 4
Technical Details
Message-ID: <9211111951.AA14238@intrepid18.WV.TEK.COM_>
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From: marvinw@intrepid18.wv.tek.COM
Subject: yet another gcc-2.3.1 -msoft-float -O2 bug
Message-ID: <9211111951.AA14238@intrepid18.WV.TEK.COM_>
Sender: gnulists@ai.mit.edu
Organization: GNUs Not Usenet
Distribution: gnu
Date: Wed, 11 Nov 1992 19:51:11 GMT
Approved: bug-gcc@prep.ai.mit.edu
Lines: 72