Wonly-top-basic-asm

[Jan Hubicka]

>  @example
> -/* Note that this code will not compile with -masm=intel */
> -#define DebugBreak() asm("int $3")
> +/* Define macro at file scope with basic asm. */
> +/* Add macro parameter p to eax. */
> +asm(".macro test p\n\t"
> +    "addl $\\p, %eax\n\t"
> +    ".endm");
> +
> +/* Use macro in function using extended asm.  It needs */
> +/* the "cc" clobber since the flags are changed and uses */
> +/* the "a" constraint since it modifies eax. */
> +int DoAdd(int value)
> +@{
> +   asm("test 5" : "+a" (value) : : "cc");
> +   return value;
> +@}

To make this work you need the .macro appear before all uses in the asm files.  I do not think
we really promise that wihtout -fno-toplevel-reorder -fno-lto

Honza