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[Bug bootstrap/41241] [4.5 regression] bootstrap comparison failure
- From: "rguenth at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 3 Sep 2009 14:51:25 -0000
- Subject: [Bug bootstrap/41241] [4.5 regression] bootstrap comparison failure
- References: <bug-41241-226@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #11 from rguenth at gcc dot gnu dot org 2009-09-03 14:51 -------
Created an attachment (id=18476)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=18476&action=view)
testcase
testcase, _umoddi_s.i from libgcc2.c
> valgrind ./cc1 -quiet -O2 -m32 t.i
==1232== Invalid read of size 1
==1232== at 0x84CA158: reg_preferred_class (reginfo.c:916)
==1232== by 0x8415E19: update_equiv_regs (ira.c:2397)
==1232== by 0x8417A8F: ira (ira.c:3135)
==1232== by 0x8418335: rest_of_handle_ira (ira.c:3343)
==1232== by 0x84911CB: execute_one_pass (passes.c:1292)
==1232== by 0x84913FF: execute_pass_list (passes.c:1341)
==1232== by 0x849141B: execute_pass_list (passes.c:1342)
==1232== by 0x85EEB4B: tree_rest_of_compilation (tree-optimize.c:390)
==1232== by 0x8801650: cgraph_expand_function (cgraphunit.c:1111)
==1232== by 0x8801801: cgraph_expand_all_functions (cgraphunit.c:1170)
==1232== by 0x8801E72: cgraph_optimize (cgraphunit.c:1429)
==1232== by 0x8801355: cgraph_finalize_compilation_unit (cgraphunit.c:1042)
==1232== Address 0x4ac5707 is 0 bytes after a block of size 495 alloc'd
==1232== at 0x40240D2: calloc (vg_replace_malloc.c:397)
==1232== by 0x8B3E40F: xcalloc (xmalloc.c:162)
==1232== by 0x84CA23E: allocate_reg_info (reginfo.c:950)
==1232== by 0x84CA411: reginfo_init (reginfo.c:1003)
==1232== by 0x84911CB: execute_one_pass (passes.c:1292)
==1232== by 0x84913FF: execute_pass_list (passes.c:1341)
==1232== by 0x849141B: execute_pass_list (passes.c:1342)
==1232== by 0x85EEB4B: tree_rest_of_compilation (tree-optimize.c:390)
==1232== by 0x8801650: cgraph_expand_function (cgraphunit.c:1111)
==1232== by 0x8801801: cgraph_expand_all_functions (cgraphunit.c:1170)
==1232== by 0x8801E72: cgraph_optimize (cgraphunit.c:1429)
==1232== by 0x8801355: cgraph_finalize_compilation_unit (cgraphunit.c:1042)
not sure if this is the cause of this bug.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41241