http://d.puremagic.com/issues/show_bug.cgi?id=5275

           Summary: x86_64 related hidden function parameter mishandled
           Product: D
           Version: D1 & D2
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: nob...@puremagic.com
        ReportedBy: bra...@puremagic.com


--- Comment #0 from Brad Roberts <bra...@puremagic.com> 2010-11-25 15:03:52 PST 
---
(split off from bug 5264)

module hrm;

struct BlkInfo { size_t size; }

extern (C) BlkInfo gc_qalloc();

void __setArrayAllocLength(ref BlkInfo info)
{
    if(info.size) {}
}

extern (C) void foo()
{
    BlkInfo info = gc_qalloc();
    __setArrayAllocLength(info);
}

$ dmd -m64 -c hrm.d   
Internal error: backend/cod1.c 2554

(same error and line number for both dmd1 and dmd2 from tip of svn for both)

call cleanup code in cod1.c funccall():

2936         if (tym1 == TYhfunc)
2937         {   // Hidden parameter is popped off by the callee
2938             c = genadjesp(c, -4);
2939             stackpush -= 4;

This code isn't aware of the 32 vs 64 bit calling convention differences yet?

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