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List:       gcc-bugs
Subject:    [Bug middle-end/36980] [4.4 Regression] Bootstrap broken with RTL checking on i586
From:       "hjl dot tools at gmail dot com" <gcc-bugzilla () gcc ! gnu ! org>
Date:       2008-07-31 13:16:17
Message-ID: 20080731131617.28248.qmail () sourceware ! org
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------- Comment #4 from hjl dot tools at gmail dot com  2008-07-31 13:16 -------
bash-3.2$ cat /tmp/crtfastmath.i
int __get_cpuid (unsigned int __level,
      unsigned int *__eax, unsigned int *__ebx,
      unsigned int *__ecx, unsigned int *__edx);

void
__attribute__ ((force_align_arg_pointer))
set_fast_math (void)
{
  unsigned int eax, ebx, ecx, edx;
  if (!__get_cpuid (1, &eax, &ebx, &ecx, &edx))
    return;
}
bash-3.2$ ../xgcc -B../ -m32 -mtune=i586 -g /tmp/crtfastmath.i -v -S 
Reading specs from ../specs
Target: x86_64-unknown-linux-gnu
Configured with: /export/gnu/src/gcc-work/gcc/configure --enable-languages=c
--disable-bootstrap --enable-checking=all --prefix=/usr/gcc-4.4-work
--with-local-prefix=/usr/local
Thread model: posix
gcc version 4.4.0 20080731 (experimental) [trunk revision 138402] (GCC) 
COLLECT_GCC_OPTIONS='-B../' '-m32' '-mtune=i586' '-g' '-v' '-S'
 ../cc1 -fpreprocessed /tmp/crtfastmath.i -quiet -dumpbase crtfastmath.i -m32
-mtune=i586 -auxbase crtfastmath -g -version -o crtfastmath.s
GNU C (GCC) version 4.4.0 20080731 (experimental) [trunk revision 138402]
(x86_64-unknown-linux-gnu)
        compiled by GNU C version 4.3.0 20080428 (Red Hat 4.3.0-8), GMP version
4.2.2, MPFR version 2.3.1.
GGC heuristics: --param ggc-min-expand=0 --param ggc-min-heapsize=0
Compiler executable checksum: a7c5eaead017286ce06e49733c7672ac
/tmp/crtfastmath.i: In function ‘set_fast_math’:
/tmp/crtfastmath.i:12: internal compiler error: RTL check: expected code 'reg',
have 'mem' in rhs_regno, at rtl.h:1005
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
bash-3.2$ 

Need to configure gcc with RTL check, like --enable-checking=all.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36980

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