[LLVMbugs] [Bug 17266] New: Self-host error on FreeBSD/i386 (PHI node has multiple entries for the same basic block with different incoming values!)

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=17266

            Bug ID: 17266
           Summary: Self-host error on FreeBSD/i386 (PHI node has multiple
                    entries for the same basic block with different
                    incoming values!)
           Product: new-bugs
           Version: trunk
          Hardware: PC
                OS: FreeBSD
            Status: NEW
          Severity: normal
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: pawel.worach at gmail.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

This has been happening for quite some time.

llvm/clang r190855 dies on the stage two build, the fist state is built with
clang 3.3. This only happens on FreeBSD/i386, amd64 does not have this issue.

llvm[4]: Compiling ARMAsmBackend.cpp for Release+Asserts build
PHI node has multiple entries for the same basic block with different incoming
values!
  %retval.0 = phi i32 [ %conv376, %if.then367 ], [ %conv378, %if.end377 ], [
%conv340, %if.end330 ], [ %conv313, %sw.bb309 ], [ %conv308, %sw.bb304 ], [
%or303, %sw.bb294 ], [ %conv293, %sw.bb289 ], [ %or288, %sw.bb243 ], [ %or242,
%sw.bb207 ], [ %conv206, %sw.bb180 ], [ %or178525, %sw.bb124 ], [ %conv123,
%sw.bb119 ], [ %or117526, %sw.bb88 ], [ %or87,
%_ZN4llvm6ARM_AML11getSOImmValEj.exit ], [ %conv65, %sw.bb61 ], [ %conv58,
%if.then51 ], [ %conv60, %if.end59 ], [ %or35, %sw.bb11 ], [ %or, %sw.bb2 ], [
%4, %entry ], [ %5, %entry ], [ %6, %entry ]
label %entry
  %5 = extractelement <2 x i32> %3, i32 0
  %4 = extractelement <2 x i32> %3, i32 0
Broken module found, compilation aborted!
Stack dump:
0.    Program arguments:
/data/buildslave/freebsd-clang-i386/obj/llvm.1/Release+Asserts/bin/clang -cc1
-triple i386-unknown-freebsd9.2 -emit-obj -disable-free -main-file-name
ARMAsmBackend.cpp -mrelocation-model pic -pic-level 2 -mdisable-fp-elim
-masm-verbose -mconstructor-aliases -target-cpu i486 -target-linker-version
2.17.50 -coverage-file
/data/buildslave/freebsd-clang-i386/obj/llvm/lib/Target/ARM/MCTargetDesc/Release+Asserts/ARMAsmBackend.o
-resource-dir
/data/buildslave/freebsd-clang-i386/obj/llvm.1/Release+Asserts/bin/../lib/clang/3.4
-dependency-file
/data/buildslave/freebsd-clang-i386/obj/llvm/lib/Target/ARM/MCTargetDesc/Release+Asserts/ARMAsmBackend.d.tmp
-MP -MT
/data/buildslave/freebsd-clang-i386/obj/llvm/lib/Target/ARM/MCTargetDesc/Release+Asserts/ARMAsmBackend.o
-MT
/data/buildslave/freebsd-clang-i386/obj/llvm/lib/Target/ARM/MCTargetDesc/Release+Asserts/ARMAsmBackend.d
-D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D
__STDC_LIMIT_MACROS -I
/data/buildslave/freebsd-clang-i386/obj/llvm/lib/Target/ARM/MCTargetDesc/.. -I
/data/buildslave/freebsd-clang-i386/src-llvm/lib/Target/ARM/MCTargetDesc/.. -I
/data/buildslave/freebsd-clang-i386/obj/llvm/include -I
/data/buildslave/freebsd-clang-i386/obj/llvm/lib/Target/ARM/MCTargetDesc -I
/data/buildslave/freebsd-clang-i386/src-llvm/include -I
/data/buildslave/freebsd-clang-i386/src-llvm/lib/Target/ARM/MCTargetDesc
-stdlib=libc++ -O2 -Woverloaded-virtual -Wcast-qual -Wno-long-long -Wall -W
-Wno-unused-parameter -Wwrite-strings -Wcovered-switch-default
-Wno-uninitialized -Wno-missing-field-initializers -pedantic -std=c++11
-fdeprecated-macro -fdebug-compilation-dir
/data/buildslave/freebsd-clang-i386/obj/llvm/lib/Target/ARM/MCTargetDesc
-ferror-limit 19 -fmessage-length 0 -fvisibility-inlines-hidden -mstackrealign
-fno-rtti -fobjc-runtime=gnustep -fobjc-default-synthesize-properties
-fdiagnostics-show-option -vectorize-loops -vectorize-slp -o
/data/buildslave/freebsd-clang-i386/obj/llvm/lib/Target/ARM/MCTargetDesc/Release+Asserts/ARMAsmBackend.o
-x c++
/data/buildslave/freebsd-clang-i386/src-llvm/lib/Target/ARM/MCTargetDesc/ARMAsmBackend.cpp 
1.    <eof> parser at end of file
2.    Code generation
3.    Running pass 'Function Pass Manager' on module
'/data/buildslave/freebsd-clang-i386/src-llvm/lib/Target/ARM/MCTargetDesc/ARMAsmBackend.cpp'.
4.    Running pass 'Module Verifier' on function
'@_ZL16adjustFixupValueRKN4llvm7MCFixupEyPNS_9MCContextE'
clang: error: unable to execute command: Abort trap: 6 (core dumped)
clang: error: clang frontend command failed due to signal (use -v to see
invocation)
clang version 3.4 (trunk 190855)
Target: i386-unknown-freebsd9.2
Thread model: posix
clang: note: diagnostic msg: PLEASE submit a bug report to
http://llvm.org/bugs/ and include the crash backtrace, preprocessed source, and
associated run script.
clang: note: diagnostic msg: 
********************

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang: note: diagnostic msg: /tmp/ARMAsmBackend-9b1b59.cpp
clang: note: diagnostic msg: /tmp/ARMAsmBackend-9b1b59.sh
clang: note: diagnostic msg: 

********************

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