http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52173
John Regehr <regehr at cs dot utah.edu> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |regehr at cs dot utah.edu
--- Comment #3 from John Regehr <regehr at cs dot utah.edu> 2012-02-15 03:50:18
UTC ---
Smaller testcase in pure C for apparently the same problem.
[regehr@gamow 1]$ current-gcc -Ofast small.c
small.c: In function 'f':
small.c:3:6: error: definition in block 8 does not dominate use in block 9
for SSA_NAME: .MEM_22 in statement:
# .MEM_29 = VDEF <.MEM_22>
c[0] = c_I_lsm.9_32;
small.c:3:6: internal compiler error: verify_ssa failed
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
[regehr@gamow 1]$ cat small.c
int a, b, c[10], d[10] = { 0, 0 };
void f (void) {
for (a = 1; a <= 4; a += 1)
d[a] = d[1];
for (; b; ++b)
c[0] |= 1;
}
[regehr@gamow 1]$ current-gcc -v
Using built-in specs.
COLLECT_GCC=current-gcc
COLLECT_LTO_WRAPPER=/uusoc/exports/scratch/regehr/z/compiler-install/gcc-r184237-install/bin/../libexec/gcc/x86_64-unknown-linux-gnu/4.7.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: ../configure --with-libelf=/usr/local --enable-lto
--prefix=/home/regehr/z/compiler-install/gcc-r184237-install
--program-prefix=r184237- --enable-languages=c,c++
Thread model: posix
gcc version 4.7.0 20120214 (experimental) (GCC)
