[LLVMbugs] [Bug 7513] New: Assertion `ALR != IntA.end() && "Live range not found!"' failed

bugzilla-daemon at llvm.org bugzilla-daemon at llvm.org
Sun Jun 27 22:52:17 PDT 2010


           Summary: Assertion `ALR != IntA.end() && "Live range not
                    found!"' 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

regehr at john-home:~/volatile/bugs/tmp317$ clang -v
clang version 2.8 (trunk 106941)
Target: i386-pc-linux-gnu
Thread model: posix

regehr at john-home:~/volatile/bugs/tmp317$ clang -O2 -fomit-frame-pointer small.c

clang: SimpleRegisterCoalescing.cpp:125: bool
llvm::CoalescerPair&, llvm::MachineInstr*): Assertion `ALR != IntA.end() &&
"Live range not found!"' failed.
0  clang 0x0908b878
Stack dump:
0.      Program arguments:
/home/regehr/z/compiler-install/llvm-gcc-r106941-install/bin/clang -cc1 -triple
i386-pc-linux-gnu -S -disable-free -main-file-name small.c -mrelocation-model
static -mconstructor-aliases -target-cpu pentium4 -resource-dir
/home/regehr/z/compiler-install/llvm-gcc-r106941-install/lib/clang/2.8 -O2 -w
-ferror-limit 19 -fmessage-length 93 -fgnu-runtime -fdiagnostics-show-option
-fcolor-diagnostics -o /tmp/cc-ebDaMQ.s -x c small.c 
1.      <eof> parser at end of file
2.      Code generation
3.      Running pass 'Simple Register Coalescing' on function '@int320'
clang: error: clang frontend command failed due to signal 6 (use -v to see

regehr at john-home:~/volatile/bugs/tmp317$ cat small.c

typedef unsigned char uint8_t;
typedef unsigned int uint32_t;
static uint8_t
safe_lshift_func_uint8_t_u_u (uint8_t left, unsigned int right)
  return right >= left > 1 >> right ? left : left << right;

uint8_t g_8[4][10] = {

int320 (const uint32pint16p_23)
  uint32_t l_281 = 0x73A2E64CL;
  for (0;; 0)
      uint8_t *l_283 = &g_8[2][1];
    lbl_290:*l_283 ^=
        func_26 (safe_lshift_func_uint8_t_u_u (l_281, l_281)), 0;
      for (l_281 = 0; 0; 1)

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