https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104985
Bug ID: 104985
Summary: [12 Regression] ICE: SIGSEGV in undo_to_marker /
adjust_reg_mode with -Os -frounding-math
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: zsojka at seznam dot cz
Target Milestone: ---
Host: x86_64-pc-linux-gnu
Target: mips64el-unknown-linux-gnuabi64
Created attachment 52651
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=52651&action=edit
reduced testcase
Compiler output:
$ mips64el-unknown-linux-gnuabi64-gcc -Os -frounding-math testcase.c -wrapper
valgrind,-q,--track-origins=yes
testcase.c: In function 'main':
testcase.c:87:14: warning: integer constant is so large that it is unsigned
87 | 14417272188526493017, 18446744073709551615, 0, 0,
| ^~~~~~~~~~~~~~~~~~~~
testcase.c:87:36: warning: integer constant is so large that it is unsigned
87 | 14417272188526493017, 18446744073709551615, 0, 0,
| ^~~~~~~~~~~~~~~~~~~~
testcase.c:88:14: warning: integer constant is so large that it is unsigned
88 | 13365776591774966959,
| ^~~~~~~~~~~~~~~~~~~~
testcase.c:89:14: warning: integer constant is so large that it is unsigned
89 | 18446744073709551615, (C) { 526289, 88628 }, (C) { 5 },
| ^~~~~~~~~~~~~~~~~~~~
==21781== Invalid read of size 8
==21781== at 0x17325FF: undo_to_marker(void*) (combine.cc:4758)
==21781== by 0x1751586: undo_all (combine.cc:4779)
==21781== by 0x1751586: try_combine(rtx_insn*, rtx_insn*, rtx_insn*,
rtx_insn*, int*, rtx_insn*) (combine.cc:3353)
==21781== by 0x175B056: combine_instructions (combine.cc:1288)
==21781== by 0x175B056: rest_of_handle_combine (combine.cc:14931)
==21781== by 0x175B056: (anonymous
namespace)::pass_combine::execute(function*) (combine.cc:14976)
==21781== by 0xE28999: execute_one_pass(opt_pass*) (passes.cc:2637)
==21781== by 0xE2925F: execute_pass_list_1(opt_pass*) (passes.cc:2737)
==21781== by 0xE29271: execute_pass_list_1(opt_pass*) (passes.cc:2738)
==21781== by 0xE29298: execute_pass_list(function*, opt_pass*)
(passes.cc:2748)
==21781== by 0xA52AC5: expand (cgraphunit.cc:1834)
==21781== by 0xA52AC5: cgraph_node::expand() (cgraphunit.cc:1787)
==21781== by 0xA5400F: expand_all_functions (cgraphunit.cc:1998)
==21781== by 0xA5400F: symbol_table::compile() [clone .part.0]
(cgraphunit.cc:2348)
==21781== by 0xA56C47: compile (cgraphunit.cc:2261)
==21781== by 0xA56C47: symbol_table::finalize_compilation_unit()
(cgraphunit.cc:2529)
==21781== by 0xF3858F: compile_file() (toplev.cc:479)
==21781== by 0x89CFEA: do_compile (toplev.cc:2168)
==21781== by 0x89CFEA: toplev::main(int, char**) (toplev.cc:2320)
==21781== Address 0x4865c48 is in a rw- anonymous segment
==21781==
==21781== Invalid read of size 1
==21781== at 0xB159DB: adjust_reg_mode(rtx_def*, machine_mode)
(emit-rtl.cc:1294)
==21781== by 0x1732606: undo_to_marker(void*) (combine.cc:4758)
==21781== by 0x1751586: undo_all (combine.cc:4779)
==21781== by 0x1751586: try_combine(rtx_insn*, rtx_insn*, rtx_insn*,
rtx_insn*, int*, rtx_insn*) (combine.cc:3353)
==21781== by 0x175B056: combine_instructions (combine.cc:1288)
==21781== by 0x175B056: rest_of_handle_combine (combine.cc:14931)
==21781== by 0x175B056: (anonymous
namespace)::pass_combine::execute(function*) (combine.cc:14976)
==21781== by 0xE28999: execute_one_pass(opt_pass*) (passes.cc:2637)
==21781== by 0xE2925F: execute_pass_list_1(opt_pass*) (passes.cc:2737)
==21781== by 0xE29271: execute_pass_list_1(opt_pass*) (passes.cc:2738)
==21781== by 0xE29298: execute_pass_list(function*, opt_pass*)
(passes.cc:2748)
==21781== by 0xA52AC5: expand (cgraphunit.cc:1834)
==21781== by 0xA52AC5: cgraph_node::expand() (cgraphunit.cc:1787)
==21781== by 0xA5400F: expand_all_functions (cgraphunit.cc:1998)
==21781== by 0xA5400F: symbol_table::compile() [clone .part.0]
(cgraphunit.cc:2348)
==21781== by 0xA56C47: compile (cgraphunit.cc:2261)
==21781== by 0xA56C47: symbol_table::finalize_compilation_unit()
(cgraphunit.cc:2529)
==21781== by 0xF3858F: compile_file() (toplev.cc:479)
==21781== Address 0xa5a5a5a5a5a5a5a7 is not stack'd, malloc'd or (recently)
free'd
==21781==
during RTL pass: combine
testcase.c:107:1: internal compiler error: Segmentation fault
107 | }
| ^
0xf382cf crash_signal
/repo/gcc-trunk/gcc/toplev.cc:322
0xb159db adjust_reg_mode(rtx_def*, machine_mode)
/repo/gcc-trunk/gcc/emit-rtl.cc:1294
0x1732606 undo_to_marker
/repo/gcc-trunk/gcc/combine.cc:4758
0x1751586 undo_all
/repo/gcc-trunk/gcc/combine.cc:4779
0x1751586 try_combine
/repo/gcc-trunk/gcc/combine.cc:3353
0x175b056 combine_instructions
/repo/gcc-trunk/gcc/combine.cc:1288
0x175b056 rest_of_handle_combine
/repo/gcc-trunk/gcc/combine.cc:14931
0x175b056 execute
/repo/gcc-trunk/gcc/combine.cc:14976
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.
$ mips64el-unknown-linux-gnuabi64-gcc -v
Using built-in specs.
COLLECT_GCC=/repo/gcc-trunk/binary-latest-mips64el/bin/mips64el-unknown-linux-gnuabi64-gcc
COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-r12-7721-20220319135312-gb60bc913cca-checking-yes-rtl-df-extra-mips64el/bin/../libexec/gcc/mips64el-unknown-linux-gnuabi64/12.0.1/lto-wrapper
Target: mips64el-unknown-linux-gnuabi64
Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++
--enable-valgrind-annotations --disable-nls --enable-checking=yes,rtl,df,extra
--with-cloog --with-ppl --with-isl
--with-sysroot=/usr/mips64el-unknown-linux-gnuabi64 --build=x86_64-pc-linux-gnu
--host=x86_64-pc-linux-gnu --target=mips64el-unknown-linux-gnuabi64
--with-ld=/usr/bin/mips64el-unknown-linux-gnuabi64-ld
--with-as=/usr/bin/mips64el-unknown-linux-gnuabi64-as --disable-multilib
--with-abi=64 --disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-r12-7721-20220319135312-gb60bc913cca-checking-yes-rtl-df-extra-mips64el
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 12.0.1 20220319 (experimental) (GCC)
