[Bug lto/45557] Segfault with -flto -O1 -finline-small-functions -fpartial-inlining

["alexey at feldgendler dot ru" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #3 from alexey at feldgendler dot ru  2010-09-06 13:51 -------
$ gdb --args /usr/local/libexec/gcc/x86_64-unknown-linux-gnu/4.6.0/cc1plus -v
-D_GNU_SOURCE TC.cpp -dumpbase TC.cpp -mtune=generic -march=x86-64 -auxbase TC
-O1 -version -flto -finline-small-functions -fpartial-inlining
GNU gdb (GDB) 7.0.1-debian
Copyright (C) 2009 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
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and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from
/usr/local/libexec/gcc/x86_64-unknown-linux-gnu/4.6.0/cc1plus...done.
(gdb) r
Starting program: /usr/local/libexec/gcc/x86_64-unknown-linux-gnu/4.6.0/cc1plus
-v -D_GNU_SOURCE TC.cpp -dumpbase TC.cpp -mtune=generic -march=x86-64 -auxbase
TC -O1 -version -flto -finline-small-functions -fpartial-inlining
GNU C++ (GCC) version 4.6.0 20100828 (experimental) (x86_64-unknown-linux-gnu)
        compiled by GNU C version 4.6.0 20100828 (experimental), GMP version
4.3.2, MPFR version 3.0.0-p3, MPC version 0.8.2
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
ignoring nonexistent directory
"/usr/local/lib/gcc/x86_64-unknown-linux-gnu/4.6.0/../../../../x86_64-unknown-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
 /usr/local/lib/gcc/x86_64-unknown-linux-gnu/4.6.0/include/c++

/usr/local/lib/gcc/x86_64-unknown-linux-gnu/4.6.0/include/c++/x86_64-unknown-linux-gnu
 /usr/local/lib/gcc/x86_64-unknown-linux-gnu/4.6.0/include/c++/backward
 /usr/local/lib/gcc/x86_64-unknown-linux-gnu/4.6.0/include
 /usr/local/include
 /usr/local/lib/gcc/x86_64-unknown-linux-gnu/4.6.0/include-fixed
 /usr/include
End of search list.
GNU C++ (GCC) version 4.6.0 20100828 (experimental) (x86_64-unknown-linux-gnu)
        compiled by GNU C version 4.6.0 20100828 (experimental), GMP version
4.3.2, MPFR version 3.0.0-p3, MPC version 0.8.2
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
options passed:  -v -D_GNU_SOURCE TC.cpp -mtune=generic -march=x86-64 -O1
 -flto -finline-small-functions -fpartial-inlining
options enabled:  -falign-loops -fasynchronous-unwind-tables
 -fauto-inc-dec -fbranch-count-reg -fcommon -fcprop-registers -fdefer-pop
 -fdelete-null-pointer-checks -fdwarf2-cfi-asm -fearly-inlining
 -feliminate-unused-debug-types -fexceptions -fforward-propagate
 -ffunction-cse -fgcse-lm -fguess-branch-probability -fident
 -fif-conversion -fif-conversion2 -finline -finline-functions-called-once
 -finline-small-functions -fipa-profile -fipa-pure-const -fipa-reference
 -fira-share-save-slots -fira-share-spill-slots -fivopts
 -fkeep-static-consts -fleading-underscore -fmath-errno -fmerge-constants
 -fmerge-debug-strings -fmove-loop-invariants -fomit-frame-pointer
 -fpartial-inlining -fpeephole -fprefetch-loop-arrays -freg-struct-return
 -fsched-critical-path-heuristic -fsched-dep-count-heuristic
 -fsched-group-heuristic -fsched-interblock -fsched-last-insn-heuristic
 -fsched-rank-heuristic -fsched-spec -fsched-spec-insn-heuristic
 -fsched-stalled-insns-dep -fshow-column -fsigned-zeros
 -fsplit-ivs-in-unroller -fsplit-wide-types -fstrict-volatile-bitfields
 -ftoplevel-reorder -ftrapping-math -ftree-bit-ccp -ftree-ccp -ftree-ch
 -ftree-copy-prop -ftree-copyrename -ftree-cselim -ftree-dce
 -ftree-dominator-opts -ftree-dse -ftree-forwprop -ftree-fre
 -ftree-loop-if-convert -ftree-loop-im -ftree-loop-ivcanon
 -ftree-loop-optimize -ftree-parallelize-loops= -ftree-phiprop -ftree-pta
 -ftree-reassoc -ftree-scev-cprop -ftree-sink -ftree-slp-vectorize
 -ftree-sra -ftree-ter -ftree-vect-loop-version -funit-at-a-time
 -funwind-tables -fvar-tracking -fvar-tracking-assignments
 -fvect-cost-model -fzero-initialized-in-bss -m128bit-long-double -m64
 -m80387 -maccumulate-outgoing-args -malign-stringops -mfancy-math-387
 -mfp-ret-in-387 -mfused-madd -mglibc -mieee-fp -mmmx -mno-sse4 -mpush-args
 -mred-zone -msse -msse2 -mtls-direct-seg-refs
Compiler executable checksum: 2c7dd1386f3abb6f2873be5b63c94737
 int f3()
Analyzing compilation unit
Performing interprocedural optimizations
 <*free_lang_data> <visibility> <early_local_cleanups> <whole-program>
<ipa-profile> <inline> <pure-const> <static-var>Assembling functions:
 f3()
Program received signal SIGSEGV, Segmentation fault.
prepare_use_sites_for (update_flags=2048) at
/home/xman/gcc-4.6-20100828/gcc/tree-into-ssa.c:2588
2588              edge e = gimple_phi_arg_edge (stmt, ix);
(gdb) bt
#0  prepare_use_sites_for (update_flags=2048) at
/home/xman/gcc-4.6-20100828/gcc/tree-into-ssa.c:2588
#1  prepare_names_to_update (update_flags=2048) at
/home/xman/gcc-4.6-20100828/gcc/tree-into-ssa.c:2657
#2  update_ssa (update_flags=2048) at
/home/xman/gcc-4.6-20100828/gcc/tree-into-ssa.c:3291
#3  0x000000000086d548 in execute_function_todo (data=<value optimized out>) at
/home/xman/gcc-4.6-20100828/gcc/passes.c:1206
#4  0x000000000086db5f in execute_todo (flags=2085) at
/home/xman/gcc-4.6-20100828/gcc/passes.c:1283
#5  0x000000000087015a in execute_one_pass (pass=0x12d7a20) at
/home/xman/gcc-4.6-20100828/gcc/passes.c:1591
#6  0x0000000000870385 in execute_pass_list (pass=0x12d7a20) at
/home/xman/gcc-4.6-20100828/gcc/passes.c:1623
#7  0x0000000000870397 in execute_pass_list (pass=0x12d7480) at
/home/xman/gcc-4.6-20100828/gcc/passes.c:1624
#8  0x0000000000969516 in tree_rest_of_compilation (fndecl=0x7ffff6b49300) at
/home/xman/gcc-4.6-20100828/gcc/tree-optimize.c:452
#9  0x0000000000b03fc6 in cgraph_expand_function (node=0x7ffff6b57000) at
/home/xman/gcc-4.6-20100828/gcc/cgraphunit.c:1469
#10 0x0000000000b069ca in cgraph_expand_all_functions () at
/home/xman/gcc-4.6-20100828/gcc/cgraphunit.c:1548
#11 cgraph_optimize () at /home/xman/gcc-4.6-20100828/gcc/cgraphunit.c:1804
#12 0x0000000000b06f1a in cgraph_finalize_compilation_unit () at
/home/xman/gcc-4.6-20100828/gcc/cgraphunit.c:1012
#13 0x000000000055345d in cp_write_global_declarations () at
/home/xman/gcc-4.6-20100828/gcc/cp/decl2.c:3924
#14 0x00000000009111da in compile_file (argc=15, argv=0x7fffffffe458) at
/home/xman/gcc-4.6-20100828/gcc/toplev.c:983
#15 do_compile (argc=15, argv=0x7fffffffe458) at
/home/xman/gcc-4.6-20100828/gcc/toplev.c:2321
#16 toplev_main (argc=15, argv=0x7fffffffe458) at
/home/xman/gcc-4.6-20100828/gcc/toplev.c:2362
#17 0x00007ffff6fbac4d in __libc_start_main (main=<value optimized out>,
argc=<value optimized out>, ubp_av=<value optimized out>, init=<value optimized
out>, fini=<value optimized out>, rtld_fini=<value optimized out>,
stack_end=0x7fffffffe448) at libc-start.c:228
#18 0x000000000049b1bd in _start ()


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45557