https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94530
Bug ID: 94530
Summary: [9/10 Regression] ICE: SIGSEGV in rhs_regno
(rtl.h:1924) with -Os -mcpu=falkor
-mpc-relative-literal-loads -mcmodel=large
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: zsojka at seznam dot cz
Target Milestone: ---
Host: x86_64-pc-linux-gnu
Target: aarch64-unknown-linux-gnu
Created attachment 48240
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=48240&action=edit
reduced testcase
Compiler output:
$ aarch64-unknown-linux-gnu-gcc -Os -mcpu=falkor -mpc-relative-literal-loads
-mcmodel=large testcase.c -wrapper valgrind,-q,--track-origins=yes
==19355== Use of uninitialised value of size 8
==19355== at 0x14B84CD: rhs_regno (rtl.h:1924)
==19355== by 0x14B84CD: valid_src_p (falkor-tag-collision-avoidance.c:541)
==19355== by 0x14B84CD: get_load_info(rtx_insn*, loop*, rtx_def**,
rtx_def**, rtx_def**, bool*, bool*) (falkor-tag-collision-avoidance.c:641)
==19355== by 0x14B98D5: record_loads (falkor-tag-collision-avoidance.c:771)
==19355== by 0x14B98D5: execute_tag_collision_avoidance()
(falkor-tag-collision-avoidance.c:824)
==19355== by 0x14BA508: pass_tag_collision_avoidance::execute(function*)
(falkor-tag-collision-avoidance.c:871)
==19355== by 0xFD3B7E: execute_one_pass(opt_pass*) (passes.c:2502)
==19355== by 0xFD432F: execute_pass_list_1(opt_pass*) (passes.c:2590)
==19355== by 0xFD4341: execute_pass_list_1(opt_pass*) (passes.c:2591)
==19355== by 0xFD4341: execute_pass_list_1(opt_pass*) (passes.c:2591)
==19355== by 0xFD4368: execute_pass_list(function*, opt_pass*)
(passes.c:2601)
==19355== by 0xC2E14B: cgraph_node::expand() (cgraphunit.c:2299)
==19355== by 0xC2F1EF: expand_all_functions (cgraphunit.c:2470)
==19355== by 0xC2F1EF: symbol_table::compile() [clone .part.0]
(cgraphunit.c:2820)
==19355== by 0xC3195C: compile (cgraphunit.c:2733)
==19355== by 0xC3195C: symbol_table::finalize_compilation_unit()
(cgraphunit.c:3000)
==19355== by 0x10D263A: compile_file() (toplev.c:483)
==19355== Uninitialised value was created by a stack allocation
==19355== at 0x14B829D: get_load_info(rtx_insn*, loop*, rtx_def**,
rtx_def**, rtx_def**, bool*, bool*) (falkor-tag-collision-avoidance.c:592)
==19355==
==19355== Invalid read of size 2
==19355== at 0x14B84CD: rhs_regno (rtl.h:1924)
==19355== by 0x14B84CD: valid_src_p (falkor-tag-collision-avoidance.c:541)
==19355== by 0x14B84CD: get_load_info(rtx_insn*, loop*, rtx_def**,
rtx_def**, rtx_def**, bool*, bool*) (falkor-tag-collision-avoidance.c:641)
==19355== by 0x14B98D5: record_loads (falkor-tag-collision-avoidance.c:771)
==19355== by 0x14B98D5: execute_tag_collision_avoidance()
(falkor-tag-collision-avoidance.c:824)
==19355== by 0x14BA508: pass_tag_collision_avoidance::execute(function*)
(falkor-tag-collision-avoidance.c:871)
==19355== by 0xFD3B7E: execute_one_pass(opt_pass*) (passes.c:2502)
==19355== by 0xFD432F: execute_pass_list_1(opt_pass*) (passes.c:2590)
==19355== by 0xFD4341: execute_pass_list_1(opt_pass*) (passes.c:2591)
==19355== by 0xFD4341: execute_pass_list_1(opt_pass*) (passes.c:2591)
==19355== by 0xFD4368: execute_pass_list(function*, opt_pass*)
(passes.c:2601)
==19355== by 0xC2E14B: cgraph_node::expand() (cgraphunit.c:2299)
==19355== by 0xC2F1EF: expand_all_functions (cgraphunit.c:2470)
==19355== by 0xC2F1EF: symbol_table::compile() [clone .part.0]
(cgraphunit.c:2820)
==19355== by 0xC3195C: compile (cgraphunit.c:2733)
==19355== by 0xC3195C: symbol_table::finalize_compilation_unit()
(cgraphunit.c:3000)
==19355== by 0x10D263A: compile_file() (toplev.c:483)
==19355== Address 0x1 is not stack'd, malloc'd or (recently) free'd
==19355==
during RTL pass: tag_collision_avoidance
testcase.c: In function 'foo':
testcase.c:6:1: internal compiler error: Segmentation fault
6 | }
| ^
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://gcc.gnu.org/bugs/> for instructions.
$ aarch64-unknown-linux-gnu-gcc -v
Using built-in specs.
COLLECT_GCC=/repo/gcc-trunk/binary-latest-aarch64/bin/aarch64-unknown-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-r10-7607-20200407213012-gc23c899aedf-checking-yes-rtl-df-extra-aarch64/bin/../libexec/gcc/aarch64-unknown-linux-gnu/10.0.1/lto-wrapper
Target: aarch64-unknown-linux-gnu
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/aarch64-unknown-linux-gnu --build=x86_64-pc-linux-gnu
--host=x86_64-pc-linux-gnu --target=aarch64-unknown-linux-gnu
--with-ld=/usr/bin/aarch64-unknown-linux-gnu-ld
--with-as=/usr/bin/aarch64-unknown-linux-gnu-as --disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-r10-7607-20200407213012-gc23c899aedf-checking-yes-rtl-df-extra-aarch64
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 10.0.1 20200407 (experimental) (GCC)
