http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46805
Summary: ICE: SIGSEGV in optab_for_tree_code (optabs.c:407)
with -O -fno-tree-scev-cprop -ftree-vectorize
Product: gcc
Version: 4.6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: zso...@seznam.cz
Created attachment 22635
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=22635
reduced testcase
valgrind output:
$ gcc -O -fno-tree-scev-cprop -ftree-vectorize pr46805.go
==28234== Conditional jump or move depends on uninitialised value(s)
==28234== at 0x595C61: Lex::require_line() (lex.cc:501)
==28234== by 0x597E1A: Lex::next_token() (lex.cc:544)
==28234== by 0x598532: Parse::peek_token() (parse.cc:64)
==28234== by 0x59A08A: Parse::package_clause() (parse.cc:4544)
==28234== by 0x5A6F7D: Parse::program() (parse.cc:4624)
==28234== by 0x5717AC: go_parse_input_files (go.cc:82)
==28234== by 0x91B4F7: toplev_main (toplev.c:579)
==28234== by 0x65EABBC: (below main) (in /lib64/libc-2.11.2.so)
==28234== Uninitialised value was created by a stack allocation
==28234== at 0x56E720: go_langhook_parse_file (go-lang.c:222)
==28234==
==28234== Invalid read of size 2
==28234== at 0x8153C0: optab_for_tree_code (optabs.c:407)
==28234== by 0xA56359: supportable_widening_operation
(tree-vect-stmts.c:5521)
==28234== by 0xA56B45: vectorizable_type_promotion (tree-vect-stmts.c:3177)
==28234== by 0xA596E3: vect_analyze_stmt (tree-vect-stmts.c:4697)
==28234== by 0xA6522E: vect_analyze_loop (tree-vect-loop.c:1249)
==28234== by 0xA71968: vectorize_loops (tree-vectorizer.c:199)
==28234== by 0x8316FE: execute_one_pass (passes.c:1553)
==28234== by 0x8319C4: execute_pass_list (passes.c:1608)
==28234== by 0x8319D6: execute_pass_list (passes.c:1609)
==28234== by 0x8319D6: execute_pass_list (passes.c:1609)
==28234== by 0x971B45: tree_rest_of_compilation (tree-optimize.c:422)
==28234== by 0xB374E1: cgraph_expand_function (cgraphunit.c:1508)
==28234== by 0xB39AB9: cgraph_optimize (cgraphunit.c:1567)
==28234== by 0xB3A039: cgraph_finalize_compilation_unit (cgraphunit.c:1031)
==28234== by 0x57B97B: Gogo::write_globals() (gogo-tree.cc:825)
==28234== by 0x91B535: toplev_main (toplev.c:591)
==28234== by 0x65EABBC: (below main) (in /lib64/libc-2.11.2.so)
==28234== Address 0x0 is not stack'd, malloc'd or (recently) free'd
==28234==
pr46805.go: In function 'main.main':
pr46805.go:3:1: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
The first failure is most likely unrelated, similiar problems can be seen for
other frontends as well.
Tested revisions:
r167453 - crash
