[LLVMbugs] [Bug 13076] New: loop in CFGBuilder::Visit ?

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=13076

             Bug #: 13076
           Summary: loop in CFGBuilder::Visit ?
           Product: new-bugs
           Version: trunk
          Platform: PC
        OS/Version: FreeBSD
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: new bugs
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: pawel.worach at gmail.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified


Created attachment 8704
  --> http://llvm.org/bugs/attachment.cgi?id=8704
Pre-processed source

Somewhere around r158250 or later self-hosted clang on FreeBSD/i386 started to
crash when building usr.bin/kdump/ioctl.c (auto generated file).

Around the same time the many-logical-ops.c test started to fail on the
self-host compiler again (not sure if that is related).

1>buildbot at llvm-i386 /tmp% gdb
/data/buildslave/freebsd-clang-i386/obj/llvm.2/Release+Asserts/bin/clang
GNU gdb 6.1.1 [FreeBSD]
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "i386-marcel-freebsd"...(no debugging symbols
found)...
(gdb) run -cc1 -triple i386-unknown-freebsd9.0 -emit-obj -disable-free
-main-file-name ioctl.c -mrelocation-model static -mdisable-fp-elim
-masm-verbose -mconstructor-aliases -target-cpu i486 -target-linker-version
2.22 -momit-leaf-frame-pointer -O2 -Wsystem-headers -Wall -Wno-format-y2k -W
-Wno-unused-parameter -Wstrict-prototypes -Wmissing-prototypes -Wpointer-arith
-Wreturn-type -Wcast-qual -Wwrite-strings -Wswitch -Wshadow -Wunused-parameter
-Wcast-align -Wchar-subscripts -Winline -Wnested-externs -Wredundant-decls
-Wold-style-definition -Wno-pointer-sign -Wno-empty-body -Wno-string-plus-int
-std=gnu99 -fconst-strings -ferror-limit 19 -fmessage-length 0 -stack-protector
1 -mstackrealign -fgnu-runtime -fobjc-runtime-has-arc -fobjc-runtime-has-weak
-fobjc-dispatch-method=non-legacy -fdiagnostics-show-option -x c ioctl-krZebt.i
Starting program:
/data/buildslave/freebsd-clang-i386/obj/llvm.2/Release+Asserts/bin/clang -cc1
-triple i386-unknown-freebsd9.0 -emit-obj -disable-free -main-file-name ioctl.c
-mrelocation-model static -mdisable-fp-elim -masm-verbose -mconstructor-aliases
-target-cpu i486 -target-linker-version 2.22 -momit-leaf-frame-pointer -O2
-Wsystem-headers -Wall -Wno-format-y2k -W -Wno-unused-parameter
-Wstrict-prototypes -Wmissing-prototypes -Wpointer-arith -Wreturn-type
-Wcast-qual -Wwrite-strings -Wswitch -Wshadow -Wunused-parameter -Wcast-align
-Wchar-subscripts -Winline -Wnested-externs -Wredundant-decls
-Wold-style-definition -Wno-pointer-sign -Wno-empty-body -Wno-string-plus-int
-std=gnu99 -fconst-strings -ferror-limit 19 -fmessage-length 0 -stack-protector
1 -mstackrealign -fgnu-runtime -fobjc-runtime-has-arc -fobjc-runtime-has-weak
-fobjc-dispatch-method=non-legacy -fdiagnostics-show-option -x c ioctl-krZebt.i
(no debugging symbols found)...[New LWP 100110]
(no debugging symbols found)...(no debugging symbols found)...(no debugging
symbols found)...(no debugging symbols found)...(no debugging symbols
found)...(no debugging symbols found)...[New Thread 2a004300 (LWP
100110/clang)]

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 2a004300 (LWP 100110/clang)]
0x089bc36c in (anonymous namespace)::CFGBuilder::Visit ()
(gdb) bt
#0  0x089bc36c in (anonymous namespace)::CFGBuilder::Visit ()
#1  0x089bf6c3 in (anonymous namespace)::CFGBuilder::Visit ()
#2  0x089bf6c3 in (anonymous namespace)::CFGBuilder::Visit ()
#3  0x089bf6c3 in (anonymous namespace)::CFGBuilder::Visit ()
#4  0x089bf6c3 in (anonymous namespace)::CFGBuilder::Visit ()
#5  0x089bf6c3 in (anonymous namespace)::CFGBuilder::Visit ()
#6  0x089bf6c3 in (anonymous namespace)::CFGBuilder::Visit ()
#7  0x089bf6c3 in (anonymous namespace)::CFGBuilder::Visit ()
#8  0x089bf6c3 in (anonymous namespace)::CFGBuilder::Visit ()
#9  0x089bf6c3 in (anonymous namespace)::CFGBuilder::Visit ()
#10 0x089bf6c3 in (anonymous namespace)::CFGBuilder::Visit ()
#11 0x089bf6c3 in (anonymous namespace)::CFGBuilder::Visit ()
#12 0x089bf6c3 in (anonymous namespace)::CFGBuilder::Visit ()
#13 0x089bf6c3 in (anonymous namespace)::CFGBuilder::Visit ()
#14 0x089bf6c3 in (anonymous namespace)::CFGBuilder::Visit ()
#15 0x089bf6c3 in (anonymous namespace)::CFGBuilder::Visit ()
#16 0x089bf6c3 in (anonymous namespace)::CFGBuilder::Visit ()
#17 0x089bf6c3 in (anonymous namespace)::CFGBuilder::Visit ()
#18 0x089bf6c3 in (anonymous namespace)::CFGBuilder::Visit ()
#19 0x089bf6c3 in (anonymous namespace)::CFGBuilder::Visit ()
#20 0x089bf6c3 in (anonymous namespace)::CFGBuilder::Visit ()
#21 0x089bf6c3 in (anonymous namespace)::CFGBuilder::Visit ()
#22 0x089bf6c3 in (anonymous namespace)::CFGBuilder::Visit ()
...

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