[LLVMbugs] [Bug 2670] New: ice

bugzilla-daemon at cs.uiuc.edu bugzilla-daemon at cs.uiuc.edu
Tue Aug 12 06:47:41 PDT 2008


           Summary: ice
           Product: new-bugs
           Version: unspecified
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: new bugs
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: regehr at cs.utah.edu
                CC: llvmbugs at cs.uiuc.edu

Seen on r54664 on Ubuntu Hardy on ia32.

regehr at john-home:~/volatile/tmp2$ clang small.c  --emit-llvm -o - | llvm-as |
opt -std-compile-opts > /dev/null
opt: ValueTracking.cpp:382: void llvm::ComputeMaskedBits(llvm::Value*, const
llvm::APInt&, llvm::APInt&, llvm::APInt&, llvm::TargetData*, unsigned int):
Assertion `(KnownZero & KnownOne) == 0&&"Bits known to be one AND zero?"'

typedef short int int16_t;
typedef int int32_t;
__extension__ typedef long long int int64_t;
int32_t g_127;
func_56 (int32_t p_58, int32_t p_59, int32_t p_61, int16_t p_62)
  int64_t l_145 = 0xE7EF8C87ACCF6E19LL;
  g_127 = ((l_145 | (rshift_s_s (p_61, 1))) % 1) == 1;

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