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Re: optimization/4382: [3.2/3.3 regression] __builtin_{set,long}jmp with -O3 can crash the compiler
- From: bangerth at dealii dot org
- To: gcc-bugs at gcc dot gnu dot org, gcc-prs at gcc dot gnu dot org, malekith at pld dot org dot pl, nobody at gcc dot gnu dot org
- Date: 6 Dec 2002 23:55:05 -0000
- Subject: Re: optimization/4382: [3.2/3.3 regression] __builtin_{set,long}jmp with -O3 can crash the compiler
- Reply-to: bangerth at dealii dot org, gcc-bugs at gcc dot gnu dot org, gcc-prs at gcc dot gnu dot org, malekith at pld dot org dot pl, nobody at gcc dot gnu dot org, gcc-gnats at gcc dot gnu dot org
Old Synopsis: __builtin_{set,long}jmp with -O3 can crash the compiler
New Synopsis: [3.2/3.3 regression] __builtin_{set,long}jmp with -O3 can crash the compiler
State-Changed-From-To: open->analyzed
State-Changed-By: bangerth
State-Changed-When: Fri Dec 6 15:55:04 2002
State-Changed-Why:
Confirmed. I get with 3.2.2pre and 3.3pre:
tmp/g> /home/bangerth/bin/gcc-3.2.2-pre/bin/gcc -c -O3 x.c
x.c: In function `main':
x.c:21: Internal compiler error in make_edges, at cfgbuild.c:402
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://www.gnu.org/software/gcc/bugs.html> for instructions.
tmp/g>
tmp/g>
tmp/g>
tmp/g> /home/bangerth/bin/gcc-3.3-pre/bin/gcc -c -O3 x.c
x.c: In function `main':
x.c:21: error: Wrong amount of branch edges after unconditional jump 0
x.c:21: internal compiler error: verify_flow_info failed
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://www.gnu.org/software/gcc/bugs.html> for instructions.
This used to work with 2.95, but failed with 3.0 first.
The following slighty simpler code also crashes the compiler,
but please don't anyone ask me whether this makes any
sense any more:
-------------------------------
void jumpaway(int *ptr) {
__builtin_longjmp(ptr,1);
}
int main(void) {
__builtin_setjmp(0);
jumpaway(0);
}
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http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=4382