[LLVMbugs] [Bug 1413] NEW: CBE produces calls to __builtin_stack_restore with C compilers that don't support them

[bugzilla-daemon at cs.uiuc.edu]

http://llvm.org/bugs/show_bug.cgi?id=1413

           Summary: CBE produces calls to __builtin_stack_restore with C
                    compilers that don't support them
           Product: libraries
           Version: 2.0
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Backend: C
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: sabre at nondot.org


The CBE is unconditionally turning calls to llvm.stacksave into calls to __builtin_stack_restore.  It should 
only do this if the C compiler supports these.  Worst case, it should emit a header that looks like this:

#if !gcc or gcc is too old
#define __builtin_stack_restore(X) 0
#endif

-Chris



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