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Re: optimization/10157: internal compiler error: in extract_insn, at recog.c:2188
- From: Peter van Hoof <p dot van-hoof at qub dot ac dot uk>
- To: p dot van-hoof at qub dot ac dot uk, gcc-gnats at gcc dot gnu dot org, gcc-bugs at gcc dot gnu dot org, nobody at gcc dot gnu dot org
- Date: Thu, 20 Mar 2003 02:53:09 +0000
- Subject: Re: optimization/10157: internal compiler error: in extract_insn, at recog.c:2188
- Organization: Queen's University of Belfast
http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=10157
This somewhat shorter version triggers the bug with -O2 instead of -O3:
void g() {
while( 1 ) {
int i,n;
double p,r;
for( i=0; i < n; i++ )
if( p > 1. )
for( i=0; i < n; i++ )
r += 2.;
}
}
scooby> gcc -c -O2 -ffast-math h3.c
h3.c: In function `g':
h3.c:10: error: unrecognizable insn:
(insn:HI 130 129 8 0 0 (set (reg:CCFPE 127)
(compare:CCFPE (reg/v:DF 109 [ p ])
(reg:DF 111))) -1 (insn_list 129 (nil))
(expr_list:REG_DEAD (reg/v:DF 109 [ p ])
(expr_list:REG_DEAD (reg:DF 111)
(expr_list:REG_EQUAL (compare:CCFPE (reg/v:DF 109 [ p ])
(const_double:DF 1.0e+0 [0x0.8p+1]))
(nil)))))
h3.c:10: internal compiler error: in extract_insn, at recog.c:2188
This bug is possibly related to bug 9352, although that one used g++ on a
different platform.