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<base href="http://llvm.org/bugs/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Assertion `i == DstIdx || !MI->getOperand(i).isReg() || MI->getOperand(i).getReg() != RegA' failed"
href="http://llvm.org/bugs/show_bug.cgi?id=15876">15876</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Assertion `i == DstIdx || !MI->getOperand(i).isReg() || MI->getOperand(i).getReg() != RegA' failed
</td>
</tr>
<tr>
<th>Product</th>
<td>new-bugs
</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>new bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>clang@martinien.de
</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>Hi,
the following inline asm causes an assert on current trunk/Linux x86-64.
Removing e.g. the "eax" in the destroyed register list makes it work.
void f()
{
int i = 1, eax;
__asm__ ("nop"
: "=a" (eax)
: "0" (i)
: "eax" );
}
clang: /local/mar_/llvmtrunk/lib/CodeGen/TwoAddressInstructionPass.cpp:1384:
void <anonymous
namespace>::TwoAddressInstructionPass::processTiedPairs(llvm::MachineInstr *,
TiedPairList &, unsigned int &): Assertion `i == DstIdx ||
!MI->getOperand(i).isReg() || MI->getOperand(i).getReg() != RegA' failed.
0 clang 0x0000000001f34af2 _ZN4llvm3sys15PrintStackTraceEP8_IO_FILE
+ 34
1 clang 0x0000000001f35023
2 libpthread.so.0 0x00002ad848dfe6b0
3 libc.so.6 0x00002ad849bc5945 gsignal + 53
4 libc.so.6 0x00002ad849bc6f21 abort + 385
5 libc.so.6 0x00002ad849bbe810 __assert_fail + 240
6 clang 0x0000000001ab2eeb
7 clang 0x00000000019ebd54
_ZN4llvm19MachineFunctionPass13runOnFunctionERNS_8FunctionE + 116
8 clang 0x0000000001ed3c0c
_ZN4llvm13FPPassManager13runOnFunctionERNS_8FunctionE + 444
9 clang 0x0000000001ed3e0b
_ZN4llvm13FPPassManager11runOnModuleERNS_6ModuleE + 59
10 clang 0x0000000001ed417e
_ZN4llvm13MPPassManager11runOnModuleERNS_6ModuleE + 494
11 clang 0x0000000001ed4788
_ZN4llvm15PassManagerImpl3runERNS_6ModuleE + 456
12 clang 0x0000000001ed492a _ZN4llvm11PassManager3runERNS_6ModuleE +
10
13 clang 0x00000000008152a7
_ZN5clang17EmitBackendOutputERNS_17DiagnosticsEngineERKNS_14CodeGenOptionsERKNS_13TargetOptionsERKNS_11LangOptionsEPN4llvm6ModuleENS_13BackendActionEPNSB_11raw_ostreamE
+ 6039
14 clang 0x0000000000812dea
15 clang 0x000000000095d9c5 _ZN5clang8ParseASTERNS_4SemaEbb + 549
16 clang 0x0000000000812034 _ZN5clang13CodeGenAction13ExecuteActionEv
+ 196
17 clang 0x000000000069ae27 _ZN5clang14FrontendAction7ExecuteEv + 119
18 clang 0x0000000000679c6d
_ZN5clang16CompilerInstance13ExecuteActionERNS_14FrontendActionE + 989
19 clang 0x00000000006602a2
_ZN5clang25ExecuteCompilerInvocationEPNS_16CompilerInstanceE + 3778
20 clang 0x0000000000656924 _Z8cc1_mainPPKcS1_S0_Pv + 772
21 clang 0x000000000065d310 main + 7328
22 libc.so.6 0x00002ad849bb1bc6 __libc_start_main + 230
23 clang 0x0000000000656559
1. <eof> parser at end of file
2. Code generation
3. Running pass 'Function Pass Manager' on module 'm.cpp'.
4. Running pass 'Two-Address instruction pass' on function '@_Z1fv'
clang: error: unable to execute command: Aborted
clang: error: clang frontend command failed due to signal (use -v to see
invocation)
clang version 3.3 (trunk 180834)
Target: x86_64-unknown-linux-gnu
Thread model: posix
Best regards,
Martin</pre>
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