https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100536
Bug ID: 100536
Summary: ICE: in expand_call, at calls.c:4980
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.FUbEknNORK-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 20210511 (experimental) [master revision
:7db32cac8:aa891c56f25baac94db004e309d1b6e40b770a95] (GCC)
$ cat mutant.c
struct {
union {
union {
union {
union {
union {
union {
double b[4];
} a[18];
} a[18];
} a[18];
} a[18];
} a[18];
} a[18];
} s;
baz() { bar(s); }
$ gcc-trunk mutant.c
mutant.c:16:1: warning: return type defaults to ‘int’ [-Wimplicit-int]
16 | baz() { bar(s); }
| ^~~
mutant.c: In function ‘baz’:
mutant.c:16:9: warning: implicit declaration of function ‘bar’; did you mean
‘baz’? [-Wimplicit-function-declaration]
16 | baz() { bar(s); }
| ^~~
| baz
mutant.c:16:9: sorry, unimplemented: passing too large argument on stack
16 | baz() { bar(s); }
| ^~~~~~
during RTL pass: expand
mutant.c:16:9: internal compiler error: in expand_call, at calls.c:4980
0x686a4e expand_call(tree_node*, rtx_def*, int)
/tmp/tmp.FUbEknNORK-gcc-builder/gcc/gcc/calls.c:4980
0xb5fe9e expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
/tmp/tmp.FUbEknNORK-gcc-builder/gcc/gcc/expr.c:11461
0xa3cfc9 expand_expr
/tmp/tmp.FUbEknNORK-gcc-builder/gcc/gcc/expr.h:301
0xa3cfc9 expand_call_stmt
/tmp/tmp.FUbEknNORK-gcc-builder/gcc/gcc/cfgexpand.c:2843
0xa3cfc9 expand_gimple_stmt_1
/tmp/tmp.FUbEknNORK-gcc-builder/gcc/gcc/cfgexpand.c:3847
0xa3cfc9 expand_gimple_stmt
/tmp/tmp.FUbEknNORK-gcc-builder/gcc/gcc/cfgexpand.c:4011
0xa428c9 expand_gimple_basic_block
/tmp/tmp.FUbEknNORK-gcc-builder/gcc/gcc/cfgexpand.c:6048
0xa4451f execute
/tmp/tmp.FUbEknNORK-gcc-builder/gcc/gcc/cfgexpand.c:6732
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.
