https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87899
Bug ID: 87899
Summary: [9 regression]r264897 cause mis-compiled native
arm-linux-gnueabihf toolchain
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: renlin at gcc dot gnu.org
Target Milestone: ---
since r264897, native arm-linux-gnueabihf toolchain has been mis-compiled.
Somehow, it survives boostrap.
It ICEs when compiling a lot of test cases. They fail with similar message.
For example:
./gcc/cc1 ~/gcc/./gcc/testsuite/gcc.c-torture/execute/pr36034-1.c -O3
test main
Analyzing compilation unit
Performing interprocedural optimizations
<*free_lang_data> <visibility> <build_ssa_passes> <opt_local_passes>
<targetclone> <free-fnsummary> <increase_alignment>Streaming LTO
<whole-program> <profile_estimate> <icf> <devirt> <cp> <fnsummary> <inline>
<pure-const> <free-fnsummary> <static-var> <single-use> <comdats>Assembling
functions:
<materialize-all-clones> testduring GIMPLE pass: ldist
gcc/./gcc/testsuite/gcc.c-torture/execute/pr36034-1.c: In function ‘test’:
gcc/./gcc/testsuite/gcc.c-torture/execute/pr36034-1.c:9:1: internal compiler
error: Segmentation fault
9 | test (void)
| ^~~~
0x5c3a37 crash_signal
../../gcc/gcc/toplev.c:325
0x63ef6b inchash::hash::add(void const*, unsigned int)
../../gcc/gcc/inchash.h:100
0x63ef6b inchash::hash::add_ptr(void const*)
../../gcc/gcc/inchash.h:94
0x63ef6b ddr_hasher::hash(data_dependence_relation const*)
../../gcc/gcc/tree-loop-distribution.c:143
0x63ef6b hash_table<ddr_hasher,
xcallocator>::find_slot(data_dependence_relation* const&, insert_option)
../../gcc/gcc/hash-table.h:414
0x63ef6b get_data_dependence
../../gcc/gcc/tree-loop-distribution.c:1184
0x63f2bd data_dep_in_cycle_p
../../gcc/gcc/tree-loop-distribution.c:1210
0x63f2bd update_type_for_merge
../../gcc/gcc/tree-loop-distribution.c:1255
0x64064b build_rdg_partition_for_vertex
../../gcc/gcc/tree-loop-distribution.c:1302
0x64064b rdg_build_partitions
../../gcc/gcc/tree-loop-distribution.c:1754
0x64064b distribute_loop
../../gcc/gcc/tree-loop-distribution.c:2795
0x642299 execute
../../gcc/gcc/tree-loop-distribution.c:3133
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with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
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