[Issue 5922] New: immutable and static variables usage in asm{}

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=5922

           Summary: immutable and static variables usage in asm{}
           Product: D
           Version: D2
          Platform: x86
        OS/Version: Windows
            Status: NEW
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: nobody at puremagic.com
        ReportedBy: bearophile_hugs at eml.cc


--- Comment #0 from bearophile_hugs at eml.cc 2011-05-03 03:04:41 PDT ---
I am not sure about the errors shown here (so no keywords). Please close this
bug report if things here are working as expected.

D2 code:


void main() {
    immutable size_t x = 10;
    asm {
        mov EDI, x;
    }
}


DMD 2.052 shows the error:
test.d(2): Error: Integer constant expression expected instead of x = 10u

--------------------------

D2 code, static (thread-local) variables can't be used in ASM:


void main() {
    static size_t x = 10;
    asm {
        mov EDI, x;
    }
}


It produces:
object.Error: Access Violation


They work using __gshared, this gives no errors:

void main() {
    __gshared static size_t x = 10;
    asm {
        mov EDI, x;
    }
}


My suggestion is to remove this source of errors. One solution may be to
disallow the direct access to static variables from asm code, avoiding this
bug.

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