https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100509
Bug ID: 100509
Summary: ICE at -O3: in fold_convert_loc, at fold-const.c:2552
Product: gcc
Version: tree-ssa
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: cnsun at uwaterloo dot ca
Target Milestone: ---
Not sure whether this is a dup of PR96131.
$ gcc-trunk -v
Using built-in specs.
COLLECT_GCC=gcc-trunk
COLLECT_LTO_WRAPPER=/scratch/software/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/12.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /tmp/tmp.FRQzt2wMfl-gcc-builder/gcc/configure
--enable-languages=c,c++,lto --enable-checking-yes --enable-multiarch
--prefix=/scratch/software/gcc-trunk --disable-bootstrap
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 12.0.0 20210510 (experimental) [master revision
:fb3a8fb4a:25f9f35a85ffee808fc1482b14d91176df59751b] (GCC)
$ cat mutant.c
struct X {
int a;
};
const a = 0;
static struct X A __attribute__((alias("a")));
foo() { struct X b = A; }
$ gcc-trunk -O3 mutant.c
mutant.c:4:7: warning: type defaults to ‘int’ in declaration of ‘a’
[-Wimplicit-int]
4 | const a = 0;
| ^
mutant.c:6:1: warning: return type defaults to ‘int’ [-Wimplicit-int]
6 | foo() { struct X b = A; }
| ^~~
during GIMPLE pass: forwprop
mutant.c: In function ‘foo’:
mutant.c:6:16: internal compiler error: in fold_convert_loc, at
fold-const.c:2552
6 | foo() { struct X b = A; }
| ^
0x6bd7c1 fold_convert_loc(unsigned int, tree_node*, tree_node*)
/tmp/tmp.FRQzt2wMfl-gcc-builder/gcc/gcc/fold-const.c:2552
0xc02486 fold_stmt_1
/tmp/tmp.FRQzt2wMfl-gcc-builder/gcc/gcc/gimple-fold.c:6269
0x1032191 execute
/tmp/tmp.FRQzt2wMfl-gcc-builder/gcc/gcc/tree-ssa-forwprop.c:3108
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.
