[LLVMbugs] [Bug 9324] New: Assertion `isVirtualRegister(Reg) && "Not a virtual register"' failed.

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=9324

           Summary: Assertion `isVirtualRegister(Reg) && "Not a virtual
                    register"' failed.
           Product: new-bugs
           Version: trunk
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: new bugs
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: regehr at cs.utah.edu
                CC: llvmbugs at cs.uiuc.edu, chenyang at cs.utah.edu


[regehr at gamow tmp004]$ clang -v
clang version 2.9 (trunk 126412)
Target: x86_64-unknown-linux-gnu
Thread model: posix

[regehr at gamow tmp004]$ clang -O small.c

clang:
/uusoc/exports/scratch/regehr/z/compiler-build/llvm-r126412/include/llvm/Target/TargetRegisterInfo.h:352:
static unsigned int llvm::TargetRegisterInfo::virtReg2Index(unsigned int):
Assertion `isVirtualRegister(Reg) && "Not a virtual register"' failed.
0  clang           0x000000000184068f
1  clang           0x0000000001842902
2  libpthread.so.0 0x00007fd1e1816190
3  libc.so.6       0x00007fd1e0b1b4b5 gsignal + 53
4  libc.so.6       0x00007fd1e0b1ef50 abort + 384
5  libc.so.6       0x00007fd1e0b14481 __assert_fail + 241
6  clang           0x00000000012d7c51
llvm::SelectionDAGISel::SelectAllBasicBlocks(llvm::Function const&) + 5473
7  clang           0x00000000012d7f42
llvm::SelectionDAGISel::runOnMachineFunction(llvm::MachineFunction&) + 594
8  clang           0x00000000017882cd
llvm::FPPassManager::runOnFunction(llvm::Function&) + 557
9  clang           0x00000000017883cb
llvm::FPPassManager::runOnModule(llvm::Module&) + 75
10 clang           0x0000000001789af4
llvm::MPPassManager::runOnModule(llvm::Module&) + 500
11 clang           0x0000000001789c67 llvm::PassManagerImpl::run(llvm::Module&)
+ 167
12 clang           0x000000000081cf48
clang::EmitBackendOutput(clang::Diagnostic&, clang::CodeGenOptions const&,
clang::TargetOptions const&, llvm::Module*, clang::BackendAction,
llvm::raw_ostream*) + 1720
13 clang           0x0000000000819fdb
clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&) + 251
14 clang           0x0000000000939683 clang::ParseAST(clang::Sema&, bool) + 275
15 clang           0x0000000000819784 clang::CodeGenAction::ExecuteAction() +
68
16 clang           0x000000000070224b
clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) + 347
17 clang           0x00000000006d98ac
clang::ExecuteCompilerInvocation(clang::CompilerInstance*) + 1276
18 clang           0x00000000006d1064 cc1_main(char const**, char const**, char
const*, void*) + 500
19 clang           0x00000000006d89ed main + 4685
20 libc.so.6       0x00007fd1e0b06abd __libc_start_main + 253
21 clang           0x00000000006cf819
Stack dump:
0.    Program arguments:
/uusoc/exports/scratch/regehr/z/compiler-install/llvm-gcc-r126412-install/bin/clang
-cc1 -triple x86_64-unknown-linux-gnu -emit-obj -disable-free -main-file-name
small.c -mrelocation-model static -mdisable-fp-elim -masm-verbose
-mconstructor-aliases -munwind-tables -target-cpu x86-64 -target-linker-version
2.20 -momit-leaf-frame-pointer -resource-dir
/uusoc/exports/scratch/regehr/z/compiler-install/llvm-gcc-r126412-install/bin/../lib/clang/2.9
-O2 -ferror-limit 19 -fmessage-length 190 -fgnu-runtime
-fdiagnostics-show-option -fcolor-diagnostics -o /tmp/cc-fCvymt.o -x c small.c 
1.    <eof> parser at end of file
2.    Code generation
3.    Running pass 'Function Pass Manager' on module 'small.c'.
4.    Running pass 'X86 DAG->DAG Instruction Selection' on function '@func_37'
clang: error: unable to execute command: Aborted
clang: error: clang frontend command failed due to signal 1 (use -v to see
invocation)

[regehr at gamow tmp004]$ cat small.c


static unsigned char
foo (short si1, unsigned char si2)
{
  return 0;
}

struct S1 {
  signed f0;
  const signed f1;
  signed f3;
};

struct S2 {
  struct S1 f1;
};

struct S3 {
  unsigned char f0;
};

struct S5 {
  unsigned char f1;
};

struct S3 g_19 = {
};

struct S5 g_254 = {
};

struct S2 g_259 = {
};

unsigned char ** func_37 (int * p_38)
{
  unsigned char l;
  unsigned char *l_801 = &g_254.f1;
  {
    if (foo (~0, 0))
      {
      }
    else
      {
    if (g_259.f1.f3)
      goto lbl_920;
      }
  }
lbl_919:*l_801 ^= 1;
  for (; ; l += 1)
    for (g_19.f0 = 0; g_19.f0 < 1; g_19.f0 += 1)
    lbl_920:if (g_259.f1.f0)
    goto lbl_919;
}

int main (int argc, char *argv[])
{
  return 0;
}

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