[LLVMbugs] [Bug 8162] New: Assertion `!isConstantRange() && "Constant and ConstantRange cannot be merged."' failed.

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=8162

           Summary: Assertion `!isConstantRange() && "Constant and
                    ConstantRange cannot be merged."' 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 tmp428]$ clang -v
clang version 2.9 (trunk 114038)
Target: x86_64-unknown-linux-gnu
Thread model: posix

[regehr at gamow tmp428]$ clang -O3 small.c -w 

clang: LazyValueInfo.cpp:228:
bool<unnamed>::LVILatticeVal::mergeIn(const<unnamed>::LVILatticeVal&):
Assertion `!isConstantRange() && "Constant and ConstantRange cannot be
merged."' failed.
0  clang           0x000000000169953f
1  clang           0x000000000169b7b2
2  libpthread.so.0 0x00007f8c0ca19190
3  libc.so.6       0x00007f8c0bd1e4b5 gsignal + 53
4  libc.so.6       0x00007f8c0bd21f50 abort + 384
5  libc.so.6       0x00007f8c0bd17481 __assert_fail + 241
6  clang           0x00000000014ca3f5
7  clang           0x00000000014cca39
8  clang           0x00000000014cd5a7
9  clang           0x00000000014cdcb1
10 clang           0x00000000014ce374
llvm::LazyValueInfo::getConstantOnEdge(llvm::Value*, llvm::BasicBlock*,
llvm::BasicBlock*) + 68
11 clang           0x000000000138fd02
12 clang           0x00000000015de4ad
llvm::FPPassManager::runOnFunction(llvm::Function&) + 557
13 clang           0x00000000014a4e2b
14 clang           0x00000000014a5585
15 clang           0x00000000015de044
llvm::MPPassManager::runOnModule(llvm::Module&) + 500
16 clang           0x00000000015de1b7 llvm::PassManagerImpl::run(llvm::Module&)
+ 167
17 clang           0x00000000007cbbb7
clang::EmitBackendOutput(clang::Diagnostic&, clang::CodeGenOptions const&,
clang::TargetOptions const&, llvm::Module*, clang::BackendAction,
llvm::raw_ostream*) + 1623
18 clang           0x00000000007c7cab
19 clang           0x00000000008e91a3 clang::ParseAST(clang::Sema&, bool) + 291
20 clang           0x00000000007c8c94 clang::CodeGenAction::ExecuteAction() +
68
21 clang           0x00000000006d5e9d
clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) + 349
22 clang           0x00000000006b3bfc
clang::ExecuteCompilerInvocation(clang::CompilerInstance*) + 1292
23 clang           0x00000000006ab968 cc1_main(char const**, char const**, char
const*, void*) + 472
24 clang           0x00000000006b27f5 main + 4117
25 libc.so.6       0x00007f8c0bd09abd __libc_start_main + 253
26 clang           0x00000000006aa2e9
Stack dump:
0.      Program arguments:
/uusoc/exports/scratch/regehr/z/compiler-install/llvm-gcc-r114038-install/bin/clang
-cc1 -triple x86_64-unknown-linux-gnu -S -disable-free -main-file-name small.c
-mrelocation-model static -mdisable-fp-elim -mconstructor-aliases
-munwind-tables -target-cpu x86-64 -target-linker-version 2.20 -resource-dir
/uusoc/exports/scratch/regehr/z/compiler-install/llvm-gcc-r114038-install/lib/clang/2.9
-O3 -w -ferror-limit 19 -fmessage-length 89 -fgnu-runtime
-fdiagnostics-show-option -fcolor-diagnostics -o /tmp/cc-C2ochI.s -x c small.c 
1.      <eof> parser at end of file
2.      Per-module optimization passes
3.      Running pass 'CallGraph Pass Manager' on module 'small.c'.
4.      Running pass 'Value Propagation' on function '@int328'
clang: error: clang frontend command failed due to signal 6 (use -v to see
invocation)

[regehr at gamow tmp428]$ cat small.c

typedef short int int16_t;
typedef unsigned char uint8_t;
typedef unsigned int uint32_t;
struct S2
{
};
int16_t g_106;
struct S2 g_128 = {
  1L, 0x5E58L
};

int328 (uint8_t p_79, uint32_t p_80, struct S3 *p_81, int16_t p_82)
{
  int i, j, k;
  for (i = 0;; 1)
    {
      int16_t l_109 = 0;
      int16_t *l_130 = &g_106;
    lbl_133:if (0)
        break;
      if (safe (0))
        {
          struct S2 *l_127 = &g_128;
          int16_t *l_129 = &l_109;
          *l_129 = l_127;
          if (p_82)
          lbl_134:if (l_109)
              goto lbl_133;
            else
              for (i; i < 1; i++)
                {
                }
        }
      else
        *l_130 &= (p_79, l_109);
    }
}

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