[cfe-dev] Readonly variable using in output list of inline asm

arsen hakobyan.ars at gmail.com
Fri Jun 15 02:10:03 PDT 2012

Hi all,

I need to know why clang allows constant variable using in output list.

const int b = 0;
            "mov $10, %0\n"
            : "=r"(b)

I found that clang checks whether variable is LValue. It does in
CheckAsmLValue() function (clang/lib/Sema/SemaStmt.cpp). but I there is not
checking for const variables.
So where it will be more effectively to change the implementation to deny
the using of read-only variables in operand list?


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