https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100786
Bug ID: 100786
Summary: ICE: in fold_convert_loc, at fold-const.c:2429
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: ---
$ 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.tVhv2eaPzV-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 20210526 (experimental) [master revision
:21638bbbf:1fd76b24306ed4df4cf9e797d900699ed59ce7f7] (GCC)
$ cat mutant.c
const double a = 0;
extern b __attribute__((alias("a")));
inc() { b++; }
$ gcc-trunk mutant.c
mutant.c:2:8: warning: type defaults to ‘int’ in declaration of ‘b’
[-Wimplicit-int]
2 | extern b __attribute__((alias("a")));
| ^
mutant.c:3:1: warning: return type defaults to ‘int’ [-Wimplicit-int]
3 | inc() { b++; }
| ^~~
mutant.c: In function ‘inc’:
mutant.c:3:10: internal compiler error: in fold_convert_loc, at
fold-const.c:2429
3 | inc() { b++; }
| ~^~
0x6bfba3 fold_convert_loc(unsigned int, tree_node*, tree_node*)
/tmp/tmp.tVhv2eaPzV-gcc-builder/gcc/gcc/fold-const.c:2429
0xc085b7 fold_stmt_1
/tmp/tmp.tVhv2eaPzV-gcc-builder/gcc/gcc/gimple-fold.c:6251
0xc3cbf2 gimplify_modify_expr
/tmp/tmp.tVhv2eaPzV-gcc-builder/gcc/gcc/gimplify.c:6000
0xc2c1f8 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
/tmp/tmp.tVhv2eaPzV-gcc-builder/gcc/gcc/gimplify.c:13965
0xc2fb2a gimplify_stmt(tree_node**, gimple**)
/tmp/tmp.tVhv2eaPzV-gcc-builder/gcc/gcc/gimplify.c:6883
0xc31ce6 gimplify_and_add(tree_node*, gimple**)
/tmp/tmp.tVhv2eaPzV-gcc-builder/gcc/gcc/gimplify.c:492
0xc31ce6 internal_get_tmp_var
/tmp/tmp.tVhv2eaPzV-gcc-builder/gcc/gcc/gimplify.c:645
0xc2b777 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
/tmp/tmp.tVhv2eaPzV-gcc-builder/gcc/gcc/gimplify.c:14954
0xc2bf91 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
/tmp/tmp.tVhv2eaPzV-gcc-builder/gcc/gcc/gimplify.c:14720
0xc3ca07 gimplify_modify_expr
/tmp/tmp.tVhv2eaPzV-gcc-builder/gcc/gcc/gimplify.c:5824
0xc2c1f8 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
/tmp/tmp.tVhv2eaPzV-gcc-builder/gcc/gcc/gimplify.c:13965
0xc2fb2a gimplify_stmt(tree_node**, gimple**)
/tmp/tmp.tVhv2eaPzV-gcc-builder/gcc/gcc/gimplify.c:6883
0xc3035e gimplify_bind_expr
/tmp/tmp.tVhv2eaPzV-gcc-builder/gcc/gcc/gimplify.c:1424
0xc2c593 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
/tmp/tmp.tVhv2eaPzV-gcc-builder/gcc/gcc/gimplify.c:14166
0xc2fb2a gimplify_stmt(tree_node**, gimple**)
/tmp/tmp.tVhv2eaPzV-gcc-builder/gcc/gcc/gimplify.c:6883
0xc31123 gimplify_body(tree_node*, bool)
/tmp/tmp.tVhv2eaPzV-gcc-builder/gcc/gcc/gimplify.c:15210
0xc31571 gimplify_function_tree(tree_node*)
/tmp/tmp.tVhv2eaPzV-gcc-builder/gcc/gcc/gimplify.c:15364
0xa842c7 cgraph_node::analyze()
/tmp/tmp.tVhv2eaPzV-gcc-builder/gcc/gcc/cgraphunit.c:670
0xa871f1 analyze_functions
/tmp/tmp.tVhv2eaPzV-gcc-builder/gcc/gcc/cgraphunit.c:1234
0xa87cc1 symbol_table::finalize_compilation_unit()
/tmp/tmp.tVhv2eaPzV-gcc-builder/gcc/gcc/cgraphunit.c:2508
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.
