https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115991
Bug ID: 115991
Summary: [15 Regression] ICE on linux-6.10 in
ix86_print_operand_address_as()
Product: gcc
Version: 15.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: slyfox at gcc dot gnu.org
Target Milestone: ---
Noticed the ICE when was building linux-6.10 with r15-2147-g9846b0916c1a9b
gcc-master:
CC [M] drivers/gpu/drm/nouveau/nvkm/subdev/acr/tu102.o
during RTL pass: final
../drivers/gpu/drm/nouveau/nvkm/subdev/acr/tu102.c: In function
'tu102_acr_wpr_build':
../drivers/gpu/drm/nouveau/nvkm/subdev/acr/tu102.c:85:1: internal compiler
error: Segmentation fault
85 | }
| ^
`cvise` came up with this example:
// $ cat tu102.c.c
typedef unsigned u32;
int list_is_head();
void tu102_acr_wpr_build_acr_0_0_0(int, long, u32);
void tu102_acr_wpr_build() {
u32 offset = 0;
for (; list_is_head();) {
int hdr;
u32 _addr = offset, _size = sizeof(hdr), *_data = &hdr;
while (_size--) {
tu102_acr_wpr_build_acr_0_0_0(0, _addr, *_data++);
_addr += 4;
}
offset += sizeof(hdr);
}
tu102_acr_wpr_build_acr_0_0_0(0, offset, 0);
}
$ gcc/xgcc -Bgcc -O2 -o bug.o -c tu102.c.c
during RTL pass: final
tu102.c.c: In function ‘tu102_acr_wpr_build’:
tu102.c.c:16:1: internal compiler error: Segmentation fault
16 | }
| ^
0x23f2c0d diagnostic_context::diagnostic_impl(rich_location*,
diagnostic_metadata const*, int, char const*, __va_list_tag (*) [1],
diagnostic_t)
???:0
0x23fc899 internal_error(char const*, ...)
???:0
0xf4a8cd crash_signal(int)
???:0
0x13d0ec3 print_reg(rtx_def*, int, _IO_FILE*)
???:0
0x13d3e9e ix86_print_operand_address_as(_IO_FILE*, rtx_def*, unsigned char,
bool)
???:0
0x13d4281 ix86_print_operand_address(_IO_FILE*, machine_mode, rtx_def*)
???:0
0xad449e output_address(machine_mode, rtx_def*)
???:0
0x13d4355 ix86_print_operand(_IO_FILE*, rtx_def*, int)
???:0
0xad43ab output_operand(rtx_def*, int)
???:0
0xad4e7e output_asm_insn(char const*, rtx_def**)
???:0
0xad910e final_scan_insn_1(rtx_insn*, _IO_FILE*, int, int, int*)
???:0
0xad956d final_scan_insn(rtx_insn*, _IO_FILE*, int, int, int*)
???:0
0xad9ed4 final_1(rtx_insn*, _IO_FILE*, int, int)
???:0
0xada376 (anonymous namespace)::pass_final::execute(function*)
???:0
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
$ gcc/xgcc -Bgcc -v
Reading specs from gcc/specs
COLLECT_GCC=gcc/xgcc
COLLECT_LTO_WRAPPER=gcc/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /home/slyfox/dev/git/gcc/configure --disable-multilib
--disable-bootstrap --disable-lto --disable-libsanitizer --enable-languages=c
CFLAGS='-O1 -g0' CXXFLAGS='-O1 -g0' LDFLAGS='-O1 -g0'
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 15.0.0 20240718 (experimental) (GCC)
