[Bug rtl-optimization/21424] New: Infinite memory allocation when -O3 is used

2005-05-06 Thread vvv dot ivanov at gmail dot com 
Compiling the following testcase with -O3 gcc tries to allocate an infinite
memory (and freezes the system for some time).

void f(int type){
int tmp;

for(tmp = 0; tmp < 2; tmp++){
switch(type) {
case 0:
s1(); break;
case 1:
s2(); break;
case 2:
s3(); break;
}
}
}

how to reproduce:
[EMAIL PROTECTED] tmp]$ arm-unknown-linux-gnu-gcc -c -O3 test.c

The bug was reproduced in gcc-2005-04-29 build for arm-unknown-linux-gnu
gcc -v:
[EMAIL PROTECTED] tmp]$
/fsf/inst/arm-3.4-20050429-2.3.2/arm-unknown-linux-gnu/gcc-3.4-20050429-glibc-2.3.2/bin/arm-unknown-linux-gnu-gcc
-v
Reading specs from
/fsf/inst/arm-3.4-20050429-2.3.2/arm-unknown-linux-gnu/gcc-3.4-20050429-glibc-2.3.2/lib/gcc/arm-unknown-linux-gnu/3.4.4/specs
Configured with:
/work/distr/fsf/crosstool-0.31/build/arm-unknown-linux-gnu/gcc-3.4-20050429-glibc-2.3.2/gcc-3.4-20050429/configure
--target=arm-unknown-linux-gnu --host=i686-host_pc-linux-gnu
--prefix=/fsf/inst/arm-3.4-20050429-2.3.2/arm-unknown-linux-gnu/gcc-3.4-20050429-glibc-2.3.2
--with-local-prefix=/fsf/inst/arm-3.4-20050429-2.3.2/arm-unknown-linux-gnu/gcc-3.4-20050429-glibc-2.3.2/arm-unknown-linux-gnu
--disable-multilib --with-newlib --without-headers --disable-nls
--enable-threads=no --enable-symvers=gnu --enable-__cxa_atexit
--enable-languages=c --disable-shared
Thread model: single
gcc version 3.4.4 20050429 (prerelease)

-- 
   Summary: Infinite memory allocation when -O3 is used
   Product: gcc
   Version: 3.4.4
Status: UNCONFIRMED
  Severity: normal
  Priority: P2
 Component: rtl-optimization
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: vvv dot ivanov at gmail dot com
CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21424

[Bug rtl-optimization/21424] Infinite memory allocation when -O3 is used

2005-05-06 Thread vvv dot ivanov at gmail dot com 

--- Additional Comments From vvv dot ivanov at gmail dot com  2005-05-06 
18:15 ---
The bug is reproduced with the latest csl-arm-branch too (2005-05-06). But
instead of infinite memory allocations, it crashes with segmentation fault:

[EMAIL PROTECTED] tmp]$
/fsf/inst/arm-csl-arm-20050506-2.3.2/arm-unknown-linux-gnu/gcc-csl-arm-20050506-glibc-2.3.2/bin/arm-unknown-linux-gnu-gcc
-c -O3 test.c
test.c: In function `f':
test.c:14: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
Send email to [EMAIL PROTECTED] for instructions.


gcc info:Reading specs from
/fsf/inst/arm-csl-arm-20050506-2.3.2/arm-unknown-linux-gnu/gcc-csl-arm-20050506-glibc-2.3.2/lib/gcc/arm-unknown-linux-gnu/3.4.3/specs
Configured with:
/work/distr/fsf/crosstool-0.31/build/arm-unknown-linux-gnu/gcc-csl-arm-20050506-glibc-2.3.2/gcc-csl-arm-20050506/configure
--target=arm-unknown-linux-gnu --host=i686-host_pc-linux-gnu
--prefix=/fsf/inst/arm-csl-arm-20050506-2.3.2/arm-unknown-linux-gnu/gcc-csl-arm-20050506-glibc-2.3.2
--with-local-prefix=/fsf/inst/arm-csl-arm-20050506-2.3.2/arm-unknown-linux-gnu/gcc-csl-arm-20050506-glibc-2.3.2/arm-unknown-linux-gnu
--disable-multilib --with-newlib --without-headers --disable-nls
--enable-threads=no --enable-symvers=gnu --enable-__cxa_atexit
--enable-languages=c --disable-shared
Thread model: single
gcc version 3.4.3 (release) (CodeSourcery ARM Q3cvs 2004)



-- 
   What|Removed |Added

 CC||mmitchel at gcc dot gnu dot
   ||org
Summary|Infinite memory allocation  |Infinite memory allocation
   |when -O3 is used|when -O3 is used


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21424