https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91173
Bug ID: 91173
Summary: [9 Regression] ICE: in int_mode_for_mode, at
stor-layout.c:403
Product: gcc
Version: 9.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: gzauhar at gmail dot com
Target Milestone: ---
GCC-9.1.0 ICEs with following test case (I used c-reduce to reduce it) when
compiling with -O1 flag. It compiles fine with -O0. Snapshot gcc-9-20190706
also ICEs. GCC-8.3.0 works fine.
------------------------------------------------------
class a {
int b;
void *c;
public:
bool aa();
int &ab() {
if (aa()) {
void *d(c);
return static_cast<int *>(d)[b];
}
return *(int *)0;
}
};
typedef enum {E} e;
class f : public a {
int g;
public:
int ac() {
if (g)
return 1;
return ac();
}
};
int *ad;
struct h {
static int ae(e, int *m) {
f ag;
int *ah;
while (!0) {
ad = &ag.ab();
ah = ad + ag.ac();
while (ad < ah)
*m = *ad++;
}
}
};
template <class, class>
void i(int *, int *, int, int *, e n, int *o) {
h::ae(n, o);
}
int aq, ar, as, at, au;
void aw() { i<int, bool>(&aq, &ar, as, &at, (e)0, &au); }
------------------------------------------------------
$ /home/gz/apps/gcc-9.1.0/bin/g++ -Wall -Wextra -pedantic -O0 -c crash.cpp
$ /home/gz/apps/gcc-9.1.0/bin/g++ -Wall -Wextra -pedantic -O1 -c crash.cpp
during RTL pass: expand
crash.cpp: In function 'void aw()':
crash.cpp:35:14: internal compiler error: in int_mode_for_mode, at
stor-layout.c:403
35 | *m = *ad++;
| ^~~~~
0x6160eb int_mode_for_mode(machine_mode)
../.././gcc/stor-layout.c:403
0x91aebd emit_move_via_integer
../.././gcc/expr.c:3357
0x92301f emit_move_insn_1(rtx_def*, rtx_def*)
../.././gcc/expr.c:3718
0x923332 emit_move_insn(rtx_def*, rtx_def*)
../.././gcc/expr.c:3786
0x9097e3 copy_to_reg(rtx_def*)
../.././gcc/explow.c:602
0x909a81 memory_address_addr_space(machine_mode, rtx_def*, unsigned char)
../.././gcc/explow.c:472
0x91feac expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
../.././gcc/expr.c:10270
0x92a3eb store_expr(tree_node*, rtx_def*, int, bool, bool)
../.././gcc/expr.c:5674
0x92b5e0 expand_assignment(tree_node*, tree_node*, bool)
../.././gcc/expr.c:5436
0x82d6b8 expand_gimple_stmt_1
../.././gcc/cfgexpand.c:3752
0x82d6b8 expand_gimple_stmt
../.././gcc/cfgexpand.c:3850
0x8325c7 expand_gimple_basic_block
../.././gcc/cfgexpand.c:5886
0x83495e execute
../.././gcc/cfgexpand.c:6509
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.
$ /home/gz/apps/gcc-9.1.0/bin/g++ -v
Using built-in specs.
COLLECT_GCC=/home/gz/apps/gcc-9.1.0/bin/g++
COLLECT_LTO_WRAPPER=/home/gz/apps/gcc-9.1.0/libexec/gcc/x86_64-pc-linux-gnu/9.1.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ./configure --prefix=/home/gz/apps/gcc-9.1.0
--enable-languages=c,c++ --disable-multilib --disable-nls
--enable-linker-build-id --enable-default-pie
Thread model: posix
gcc version 9.1.0 (GCC)
