[LLVMbugs] [Bug 1214] NEW: llvm-gcc4 barfs on simple packed bit-fields

bugzilla-daemon at cs.uiuc.edu bugzilla-daemon at cs.uiuc.edu
Tue Feb 20 13:08:00 PST 2007


           Summary: llvm-gcc4 barfs on simple packed bit-fields
           Product: new-bugs
           Version: unspecified
          Platform: Other
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: new bugs
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: baldrick at free.fr

Compiling the following code gives
llvm-convert.cpp:4299: LValue TreeToLLVM::EmitLV_COMPONENT_REF(tree_node*): 
Assertion `NumAlignmentUnits && "Not adjusting pointer?"' failed.

struct X {
  char A : 6;
  char B : 3;
} __attribute__((packed));

int main (void)
  struct X x;

  x.A = 1;
  x.B = 2;

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