<html>
<head>
<base href="http://llvm.org/bugs/" />
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Complex Constant Zero Value Assignment Crashes Codegen"
href="http://llvm.org/bugs/show_bug.cgi?id=18586">18586</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Complex Constant Zero Value Assignment Crashes Codegen
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>3.3
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>LLVM Codegen
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>jleidel@micron.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=11921" name="attach_11921" title="preprocessed C">attachment 11921</a> <a href="attachment.cgi?id=11921&action=edit" title="preprocessed C">[details]</a></span>
preprocessed C
Setting a constant, complex variable to zero crashes/asserts the codegen.
#include <complex.h>
float complex caxpy_chop()
{
const float complex zero=0.0f;
return zero;
}
Using LLVM/Clang 3.3 [released].
$> clang -v
clang version 3.3
Target: x86_64-unknown-linux-gnu
Thread model: posix
CFLAGS: -O0 -Wall -pedantic -std=c99 -c
Trace:
clang: /scratch/REMOVED/tot//llvm/include/llvm/Support/Casting.h:237: typename
llvm::enable_if<llvm::is_same<Y, typename
llvm::simplify_type<From>::SimpleType>, typename llvm::cast_retty<X,
Y*>::ret_type>::type llvm::cast(Y*) [with X = llvm::ConstantStruct; Y =
llvm::Constant; typename llvm::enable_if<llvm::is_same<Y, typename
llvm::simplify_type<From>::SimpleType>, typename llvm::cast_retty<X,
Y*>::ret_type>::type = llvm::ConstantStruct*]: Assertion `isa<X>(Val) &&
"cast<Ty>() argument of incompatible type!"' failed.
0 clang 0x00000000020e2d22 llvm::sys::PrintStackTrace(_IO_FILE*) +
34
1 clang 0x00000000020e29b1
2 libpthread.so.0 0x0000003c7820f710
3 libc.so.6 0x0000003c77e32925 gsignal + 53
4 libc.so.6 0x0000003c77e34105 abort + 373
5 libc.so.6 0x0000003c77e2ba4e
6 libc.so.6 0x0000003c77e2bb10 __assert_perror_fail + 0
7 clang 0x0000000000a0a779
8 clang 0x0000000000667767
9 clang 0x0000000000a09e8a
10 clang 0x0000000000a0a914
clang::CodeGen::CodeGenFunction::EmitComplexExprIntoLValue(clang::Expr const*,
clang::CodeGen::LValue, bool) + 84
11 clang 0x0000000000a76850
clang::CodeGen::CodeGenFunction::EmitReturnStmt(clang::ReturnStmt const&) +
1664
12 clang 0x0000000000a76bac
clang::CodeGen::CodeGenFunction::EmitStmt(clang::Stmt const*) + 396
13 clang 0x0000000000a7706f
clang::CodeGen::CodeGenFunction::EmitCompoundStmtWithoutScope(clang::CompoundStmt
const&, bool, clang::CodeGen::AggValueSlot) + 79
14 clang 0x000000000093c78d
clang::CodeGen::CodeGenFunction::EmitFunctionBody(clang::CodeGen::FunctionArgList&)
+ 93
15 clang 0x0000000000941169
clang::CodeGen::CodeGenFunction::GenerateCode(clang::GlobalDecl,
llvm::Function*, clang::CodeGen::CGFunctionInfo const&) + 1257
16 clang 0x0000000000955c8c
clang::CodeGen::CodeGenModule::EmitGlobalFunctionDefinition(clang::GlobalDecl)
+ 572
17 clang 0x0000000000956ccc
clang::CodeGen::CodeGenModule::EmitGlobalDefinition(clang::GlobalDecl) + 460
18 clang 0x0000000000958cb4
clang::CodeGen::CodeGenModule::EmitGlobal(clang::GlobalDecl) + 1492
19 clang 0x00000000009593d5
20 clang 0x0000000000930a4c
21 clang 0x00000000009300fc
22 clang 0x0000000000a95da6 clang::ParseAST(clang::Sema&, bool, bool)
+ 310
23 clang 0x000000000092edfc clang::CodeGenAction::ExecuteAction() +
60
24 clang 0x00000000007c3f89 clang::FrontendAction::Execute() + 249
25 clang 0x00000000007a55b5
clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) + 357
26 clang 0x000000000078eb05
clang::ExecuteCompilerInvocation(clang::CompilerInstance*) + 1765
27 clang 0x0000000000786648 cc1_main(char const**, char const**, char
const*, void*) + 1208
28 clang 0x000000000078c398 main + 2072
29 libc.so.6 0x0000003c77e1ed1d __libc_start_main + 253
30 clang 0x0000000000785415
Stack dump:
0. Program arguments: /opt/REMOVED/llvm-3.3/bin/clang -cc1 -triple
x86_64-unknown-linux-gnu -emit-obj -mrelax-all -disable-free -main-file-name
caxpy.c -mrelocation-model static -mdisable-fp-elim -fmath-errno -masm-verbose
-mconstructor-aliases -munwind-tables -target-cpu x86-64 -target-linker-version
2.20.51.0.2 -coverage-file /home/REMOVED/bugs/tmp/caxpy.llvmbase -resource-dir
/opt/REMOVED/llvm-3.3/bin/../lib/clang/3.3 -internal-isystem /usr/local/include
-internal-isystem /opt/REMOVED/llvm-3.3/bin/../lib/clang/3.3/include
-internal-externc-isystem /include -internal-externc-isystem /usr/include -O0
-Wall -pedantic -std=c99 -fdebug-compilation-dir /home/REMOVED/bugs/tmp
-ferror-limit 19 -fmessage-length 139 -mstackrealign -fobjc-runtime=gcc
-fobjc-default-synthesize-properties -fdiagnostics-show-option
-fcolor-diagnostics -backend-option -vectorize-loops -o caxpy.llvmbase -x c
caxpy.c
1. <eof> parser at end of file
2. caxpy.c:5:15: LLVM IR generation of declaration 'caxpy_chop'
3. caxpy.c:5:15: Generating code for declaration 'caxpy_chop'
clang: error: unable to execute command: Aborted (core dumped)
clang: error: clang frontend command failed due to signal (use -v to see
invocation)
clang version 3.3 (svn+ssh://REMOVED.REMOVED.com/svn/trunk/llvm/3.3/cfe-3.3.src
82)
Target: x86_64-unknown-linux-gnu
Thread model: posix
clang: note: diagnostic msg: PLEASE submit a bug report to
<a href="http://llvm.org/bugs/">http://llvm.org/bugs/</a> 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/caxpy-60RjaU.c
clang: note: diagnostic msg: /tmp/caxpy-60RjaU.sh
clang: note: diagnostic msg:</pre>
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