[LLVMbugs] [Bug 6860] New: ice: Live range not found

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=6860

           Summary: ice: Live range not found
           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


As below.  Seen on x64 Linux.  

[regehr at gamow tmp403]$ clang -O1 small.c

clang: SimpleRegisterCoalescing.cpp:646: bool
llvm::SimpleRegisterCoalescing::ReMaterializeTrivialDef(llvm::LiveInterval&,
unsigned int, unsigned int, llvm::MachineInstr*): Assertion `SrcLR !=
SrcInt.end() && "Live range not found!"' failed.
0  clang           0x0000000001246a0f
1  clang           0x0000000001248912
2  libpthread.so.0 0x00007fbb0fbc3190
3  libc.so.6       0x00007fbb0eec94b5 gsignal + 53
4  libc.so.6       0x00007fbb0eeccf50 abort + 384
5  libc.so.6       0x00007fbb0eec2481 __assert_fail + 241
6  clang           0x0000000000ef2f8f
7  clang           0x0000000000ef35cb
8  clang           0x0000000000ef80af
9  clang           0x0000000000ef94a7
10 clang           0x0000000000ef9c46
11 clang           0x0000000000efaaa8
12 clang           0x00000000011ca3fd
13 clang           0x00000000011ca5db
14 clang           0x00000000011ca89f
15 clang           0x0000000000415357
16 clang           0x0000000000415bd5
17 clang           0x000000000060eb09
18 clang           0x0000000000419721
19 clang           0x00000000004099bb
20 clang           0x000000000040cd2b main + 2491
21 libc.so.6       0x00007fbb0eeb4abd __libc_start_main + 253
22 clang           0x0000000000407199
Stack dump:
0.    Program arguments:
/uusoc/exports/scratch/regehr/z/compiler-install/llvm-gcc-r101534-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 -resource-dir
/uusoc/exports/scratch/regehr/z/compiler-install/llvm-gcc-r101534-install/lib/clang/1.5
-O1 -ferror-limit 19 -fmessage-length 80 -fgnu-runtime
-fdiagnostics-show-option -fcolor-diagnostics -o /tmp/cc-ELwZYl.s -x c small.c 
1.    <eof> parser at end of file
2.    Code generation
3.    Running pass 'Simple Register Coalescing' on function '@func_1'
clang: error: compiler command failed due to signal 6 (use -v to see
invocation)

[regehr at gamow tmp403]$ cat small.c

typedef short int int16_t;
typedef int int32_t;
typedef unsigned short int uint16_t;
typedef unsigned int uint32_t;
struct S0
{
  int32_t f0;
  volatile uint16_t f1;
  const uint32_t f3;
  volatile int16_t f4;
  volatile uint32_t f6;
  uint32_t f7;
};
struct S2
{
  volatile struct S0 f2;
  volatile struct S0 f3;
  volatile struct S0 f5;
};
struct S2 g_557 = {
};

struct S2
func_1 (void)
{
  return g_557;
}

[regehr at gamow tmp403]$ clang -v

clang version 1.5 (trunk 101534)
Target: x86_64-unknown-linux-gnu
Thread model: posix

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