https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102385
Bug ID: 102385
Summary: ICE: in single_pred_edge, at basic-block.h:350 under
"-O2 -fno-toplevel-reorder -fno-tree-ch -fno-tree-dce
-fno-tree-dominator-opts -fno-tree-dse
-fno-tree-loop-ivcanon -fpredictive-commoning"
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: suochenyao at 163 dot com
Target Milestone: ---
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OS and Platform:
CentOS Linux release 7.8.2003 (Core), x86_64 GNU/Linux
*******************************************************************************
Program:
short a, b;
int c[9];
void(d)() {}
void e() {
a = 0;
for (; a <= 4; a++) {
short *f = &b;
c[a] || (*f = 0);
d(c[a + 2]);
}
}
int main() {return 0;}
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gcc version:
$ gcc -v
Using built-in specs.
COLLECT_GCC=/data/bin/gcc-dev/bin/gcc
COLLECT_LTO_WRAPPER=/data/bin/gcc-dev/libexec/gcc/x86_64-pc-linux-gnu/12.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../configure --prefix=/data/bin/gcc-dev --disable-multilib
--enable-languages=c,c++
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 12.0.0 20210916 (experimental) (GCC)
git version: 745781d24cd7562202687cfbe05597ee673d4537
*******************************************************************************
Command Lines:
$ gcc -Wall -Wextra -O2 -fno-toplevel-reorder -fno-tree-ch -fno-tree-dce
-fno-tree-dominator-opts -fno-tree-dse -fno-tree-loop-ivcanon
-fpredictive-commoning a.c
during GIMPLE pass: pcom
a.c: In function ‘e’:
a.c:4:6: internal compiler error: in single_pred_edge, at basic-block.h:350
4 | void e() {
| ^
0x773ee4 single_pred_edge
../../gcc/basic-block.h:350
0x77461d single_pred_edge
../../gcc/sbitmap.h:105
0x77461d tree_transform_and_unroll_loop(loop*, unsigned int, edge_def*,
tree_niter_desc*, void (*)(loop*, void*), void*)
../../gcc/tree-ssa-loop-manip.c:1295
0xf525c8 pcom_worker::tree_predictive_commoning_loop(bool)
../../gcc/tree-predcom.c:3401
0xf52aa4 tree_predictive_commoning(bool)
../../gcc/tree-predcom.c:3428
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
