When I use the actual snapshot of gcc41 (gcc-4.1-20050709) to compile the small
test program given below, I get an ICE.
void work1 (float* Data, float* Kern, float* Mul)
{
for (int i=0; i<24; i++) Mul[i] = Data[i] * Kern[i];
}
int main (int argc, char **argv)
{
float Kern[24] __attribute__ ((aligned (16)))
= {1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4};
float Data[24] __attribute__ ((aligned (16)))
= {1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4};
float Mul [24] __attribute__ ((aligned (16)))
= {1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4};
work1(Data, Kern, Mul);
return int(Mul[0]);
}
Since it is a similar ICE as in bug22037 I applied the patch given there, which
had no effect.
g++41f -O3 -ftree-vectorize -c -o vectest.o vectest.cpp
vectest.cpp: In function 'int main(int, char**)':
vectest.cpp:6: error: definition in block 0 follows the use
for SSA_NAME: Data_97 in statement:
# VUSE <Data_97>;
vect_var_.45_122 = *vect_pData.46_121;
vectest.cpp:6: internal compiler error: verify_ssa failed
Please submit a full bug report, with preprocessed source if appropriate.
g++41f -v
Using built-in specs.
Target: x86_64-unknown-linux-gnu
Configured with: ../gcc-4.1-20050709/configure --prefix=/usr/local/gcc41f
--program-suffix=41f --with-arch=opteron
--enable-languages=c,c++ --enable-checking
Thread model: posix
gcc version 4.1.0 20050709 (experimental)
Michael Cieslinski
--
Summary: ICE with autovectorisation: verify_ssa failed
Product: gcc
Version: 4.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: tree-optimization
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: micis at gmx dot de
CC: gcc-bugs at gcc dot gnu dot org
GCC build triplet: x86_64-unknown-linux-gnu
GCC host triplet: x86_64-unknown-linux-gnu
GCC target triplet: x86_64-unknown-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22433
