[LLVMbugs] [Bug 509] NEW: [llvm-g++] Do not use dynamic initialization where static init will do

[bugzilla-daemon at cs.uiuc.edu]

http://llvm.cs.uiuc.edu/bugs/show_bug.cgi?id=509

           Summary: [llvm-g++] Do not use dynamic initialization where
                    static init will do
           Product: tools
           Version: 1.4
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: llvm-g++
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: sabre at nondot.org


For the following testcase:

---
struct Data {
  unsigned *data;
  unsigned array[1];
};

Data shared_null = { shared_null.array, {0} };
---

llvm-g++ emits a dynamic initialization of the 'shared_null' global.  g++
statically intializes the global (because the initializer *IS* a constant), and
we should too.

This bug causes us to miscompile QT-4.0, as it has other dynamic intializers
that depend on this.  In this case, some initializers run that use this, then
this initializer runs, then others run.  This is a problem.

-Chris



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