[LLVMbugs] [Bug 18999] New: clang crashes at -O0 (and above) on x86_64-linux-gnu
bugzilla-daemon at llvm.org
bugzilla-daemon at llvm.org
Thu Feb 27 20:58:30 PST 2014
http://llvm.org/bugs/show_bug.cgi?id=18999
Bug ID: 18999
Summary: clang crashes at -O0 (and above) on x86_64-linux-gnu
Product: clang
Version: trunk
Hardware: PC
OS: All
Status: NEW
Severity: normal
Priority: P
Component: -New Bugs
Assignee: unassignedclangbugs at nondot.org
Reporter: su at cs.ucdavis.edu
CC: llvmbugs at cs.uiuc.edu
Classification: Unclassified
The current clang trunk crashes when compiling the following testcase at -O0
(and above) in both 32-bit and 64-bit modes on x86_64-linux-gnu.
This is a regression from clang 3.4.
$ clang-trunk -v
clang version 3.5 (trunk 202395)
Target: x86_64-unknown-linux-gnu
Thread model: posix
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/4.8
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/4.8.1
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.4
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.4.6
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.4.7
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.6
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.6.4
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.7
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.7.3
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.8
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.8.1
Selected GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.8
Candidate multilib: .;@m64
Candidate multilib: 32;@m32
Selected multilib: .;@m64
$
$ clang-3.4 -O0 -c small.c
$
$ clang-trunk -O0 -c small.c
0 clang 0x00000000023992f5 llvm::sys::PrintStackTrace(_IO_FILE*) +
37
1 clang 0x0000000002399ae3
2 libpthread.so.0 0x00007fcb78bcecb0
3 clang 0x0000000000e125f7
clang::sema::AnalysisBasedWarnings::IssueWarnings(clang::sema::AnalysisBasedWarnings::Policy,
clang::sema::FunctionScopeInfo*, clang::Decl const*, clang::BlockExpr const*) +
2903
4 clang 0x0000000000a91943
clang::Sema::PopFunctionScopeInfo(clang::sema::AnalysisBasedWarnings::Policy
const*, clang::Decl const*, clang::BlockExpr const*) + 99
5 clang 0x0000000000b36e2e
clang::Sema::ActOnFinishFunctionBody(clang::Decl*, clang::Stmt*, bool) + 3342
6 clang 0x0000000000a62f48
clang::Parser::ParseFunctionStatementBody(clang::Decl*,
clang::Parser::ParseScope&) + 280
7 clang 0x00000000009f07dd
clang::Parser::ParseFunctionDefinition(clang::ParsingDeclarator&,
clang::Parser::ParsedTemplateInfo const&, clang::Parser::LateParsedAttrList*) +
2093
8 clang 0x0000000000a0278d
clang::Parser::ParseDeclGroup(clang::ParsingDeclSpec&, unsigned int, bool,
clang::SourceLocation*, clang::Parser::ForRangeInit*) + 1389
9 clang 0x00000000009efd59
clang::Parser::ParseDeclOrFunctionDefInternal(clang::Parser::ParsedAttributesWithRange&,
clang::ParsingDeclSpec&, clang::AccessSpecifier) + 697
10 clang 0x00000000009ef7b3
clang::Parser::ParseDeclarationOrFunctionDefinition(clang::Parser::ParsedAttributesWithRange&,
clang::ParsingDeclSpec*, clang::AccessSpecifier) + 403
11 clang 0x00000000009eeb67
clang::Parser::ParseExternalDeclaration(clang::Parser::ParsedAttributesWithRange&,
clang::ParsingDeclSpec*) + 2615
12 clang 0x00000000009ee05e
clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&) + 446
13 clang 0x00000000009eaa00 clang::ParseAST(clang::Sema&, bool, bool)
+ 256
14 clang 0x000000000085a34e clang::CodeGenAction::ExecuteAction() +
142
15 clang 0x00000000006b0ea0 clang::FrontendAction::Execute() + 112
16 clang 0x000000000068be5d
clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) + 925
17 clang 0x000000000067273f
clang::ExecuteCompilerInvocation(clang::CompilerInstance*) + 2959
18 clang 0x0000000000669c5c cc1_main(char const**, char const**, char
const*, void*) + 700
19 clang 0x00000000006707f8 main + 9864
20 libc.so.6 0x00007fcb779d776d __libc_start_main + 237
21 clang 0x00000000006698b9
Stack dump:
0. Program arguments: /usr/local/clang-trunk/bin/clang -cc1 -triple
x86_64-unknown-linux-gnu -emit-obj -mrelax-all -disable-free -main-file-name
small.c -mrelocation-model static -mdisable-fp-elim -fmath-errno -masm-verbose
-mconstructor-aliases -munwind-tables -fuse-init-array -target-cpu x86-64
-target-linker-version 2.22 -coverage-file
/data2/c-hunter-results/C/trans-bugs/20140227-clang-m32-m64-O0-O1-O2-O3-Os-build-test152841/small.o
-resource-dir /usr/local/clang-trunk/bin/../lib/clang/3.5 -internal-isystem
/usr/local/include -internal-isystem
/usr/local/clang-trunk/bin/../lib/clang/3.5/include -internal-externc-isystem
/usr/include/x86_64-linux-gnu -internal-externc-isystem /include
-internal-externc-isystem /usr/include -O0 -fdebug-compilation-dir
/data2/c-hunter-results/C/trans-bugs/20140227-clang-m32-m64-O0-O1-O2-O3-Os-build-test152841
-ferror-limit 19 -fmessage-length 131 -mstackrealign -fobjc-runtime=gcc
-fdiagnostics-show-option -fcolor-diagnostics -vectorize-slp -o small.o -x c
small.c
1. <eof> parser at end of file
2. small.c:3:1: parsing function body 'foo'
clang: error: unable to execute command: Segmentation fault (core dumped)
clang: error: clang frontend command failed due to signal (use -v to see
invocation)
clang version 3.5 (trunk 202395)
Target: x86_64-unknown-linux-gnu
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/small-75d5d5.c
clang: note: diagnostic msg: /tmp/small-75d5d5.sh
clang: note: diagnostic msg:
********************
$
-------------------------
int
foo ()
{
lbl:
if (1)
goto lbl;
}
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