<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 --- - arm: "Unknown mismatch!" assertion when using floating point on inline assembler"
href="http://llvm.org/bugs/show_bug.cgi?id=17810">17810</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>arm: "Unknown mismatch!" assertion when using floating point on inline assembler
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux
</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>Backend: ARM
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>m_kato@ga2.so-net.ne.jp
</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>clang (and LLVM) cannot handle the following ARM assembler.
int to_int32(double d)
{
int i;
__asm(
"mov %0, %Q1\n"
"add %0, %R1\n"
: "=r"(i), "=&r"(d)
: "1"(d)
:);
return i;
}
"Q" and "R" is assigned to high dword and low dword of double, but LLVM cannot
handle this.
clang:
/home/makoto/Development/llvm.org/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp:387:
void getCopyToParts(llvm::SelectionDAG &, llvm::SDLoc, llvm::SDValue,
llvm::SDValue *, unsigned int, llvm::MVT, const llvm::Value *, ISD::NodeType):
Assertion `(PartVT.isInteger() || PartVT == MVT::x86mmx) && ValueVT.isInteger()
&& "Unknown mismatch!"' failed.
0 clang 0x00000000034ee98e llvm::sys::PrintStackTrace(_IO_FILE*) +
46
1 clang 0x00000000034eec4b
2 clang 0x00000000034eeebe
3 libpthread.so.0 0x00007f0d55565bb0
4 libc.so.6 0x00007f0d54579f77 gsignal + 55
5 libc.so.6 0x00007f0d5457d5e8 abort + 328
6 libc.so.6 0x00007f0d54572d43
7 libc.so.6 0x00007f0d54572df2
8 clang 0x0000000002a8f3f9
9 clang 0x0000000002ab7988
10 clang 0x0000000002a96aea
llvm::SelectionDAGBuilder::visitInlineAsm(llvm::ImmutableCallSite) + 7322
11 clang 0x0000000002a87941
llvm::SelectionDAGBuilder::visitCall(llvm::CallInst const&) + 97
12 clang 0x0000000002a80399 llvm::SelectionDAGBuilder::visit(unsigned
int, llvm::User const&) + 1097
13 clang 0x0000000002a7f8b3
llvm::SelectionDAGBuilder::visit(llvm::Instruction const&) + 131
14 clang 0x0000000002add51c
llvm::SelectionDAGISel::SelectBasicBlock(llvm::ilist_iterator<llvm::Instruction
const>, llvm::ilist_iterator<llvm::Instruction const>, bool&) + 140
15 clang 0x0000000002add035
llvm::SelectionDAGISel::SelectAllBasicBlocks(llvm::Function const&) + 2469
16 clang 0x0000000002adb787
llvm::SelectionDAGISel::runOnMachineFunction(llvm::MachineFunction&) + 935
17 clang 0x0000000002d01ade
llvm::MachineFunctionPass::runOnFunction(llvm::Function&) + 110
18 clang 0x0000000003459b5b
llvm::FPPassManager::runOnFunction(llvm::Function&) + 427
19 clang 0x0000000003459e68
llvm::FPPassManager::runOnModule(llvm::Module&) + 104
20 clang 0x000000000345a26a
llvm::MPPassManager::runOnModule(llvm::Module&) + 634
21 clang 0x000000000345aa1e llvm::PassManagerImpl::run(llvm::Module&)
+ 302
22 clang 0x000000000345ac71 llvm::PassManager::run(llvm::Module&) +
33
23 clang 0x0000000000b6db59
24 clang 0x0000000000b6d688
clang::EmitBackendOutput(clang::DiagnosticsEngine&, clang::CodeGenOptions
const&, clang::TargetOptions const&, clang::LangOptions const&, llvm::Module*,
clang::BackendAction, llvm::raw_ostream*) + 104
25 clang 0x0000000000b6a6f9
26 clang 0x0000000000dcb9cd clang::ParseAST(clang::Sema&, bool, bool)
+ 813
27 clang 0x00000000008a1229 clang::ASTFrontendAction::ExecuteAction()
+ 345
28 clang 0x0000000000b69a3e clang::CodeGenAction::ExecuteAction() +
1246
29 clang 0x00000000008a0d4f clang::FrontendAction::Execute() + 191
30 clang 0x000000000086bc20
clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) + 800
31 clang 0x000000000082db68
clang::ExecuteCompilerInvocation(clang::CompilerInstance*) + 1048
32 clang 0x000000000081b73a cc1_main(char const**, char const**, char
const*, void*) + 698
33 clang 0x0000000000827b42 main + 802
34 libc.so.6 0x00007f0d54564de5 __libc_start_main + 245
35 clang 0x000000000081b3b9
Stack dump:
0. Program arguments:
/home/makoto/Development/llvm.org/build/Debug+Asserts/bin/clang -cc1 -triple
armv7-none-linux-androideabi -S -disable-free -main-file-name asm.c
-mrelocation-model static -mdisable-fp-elim -fmath-errno -mconstructor-aliases
-fuse-init-array -target-cpu cortex-a8 -target-feature +soft-float-abi
-target-abi aapcs-linux -mfloat-abi soft -target-linker-version 2.23.52.201309
13 -coverage-file /tmp/asm-6f9de6.s -resource-dir
/home/makoto/Development/llvm.org/build/Debug+Asserts/bin/../lib/clang/3.4
-internal-isystem /usr/local/include -internal-isystem
/home/makoto/Development/llvm.org/build/Debug+Asserts/bin/../lib/clang/3.4/include
-internal-externc-isystem /include -internal-externc-isystem /usr/include
-fno-dwarf-directory-asm -fdebug-compilation-dir
/home/makoto/Development/llvm.org/build -ferror-limit 19 -fmessage-length 80
-mstackrealign -fno-signed-char -fobjc-runtime=gcc -fdiagnostics-show-option
-fcolor-diagnostics-vectorize-slp -o /tmp/asm-6f9de6.s -x c asm.c
1. <eof> parser at end of file
2. Code generation
3. Running pass 'Function Pass Manager' on module 'asm.c'.
4. Running pass 'ARM Instruction Selection' on function '@to_int32'
clang: error: unable to execute command: Aborted (core dumped)
clang: error: clang frontend command failed due to signal (use -v to see
invocat
ion)
clang version 3.4 (trunk 193915)
Target: armv7-none-linux-androideabi
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/asm-e4fbd1.c
clang: note: diagnostic msg: /tmp/asm-e4fbd1.sh
clang: note: diagnostic msg:</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are on the CC list for the bug.</li>
</ul>
</body>
</html>