This patch adds the support of these two directives : `!dir$ inline` and `!dir$ noinline`. - `!dir$ noinline` tells to the compiler to not perform inlining on specific function calls by adding the `noinline` metadata on the call. - `!dir$ inline` tells to the compiler to attempt inlining on specific function calls by adding the `inlinehint` metadata on the call. - `!dir$ forceinline` tells to the compiler to always perfom inlining on specific function calls by adding the `alwaysinline` metadata on the call. Currently, these directives can be placed before a `DO LOOP`, call functions or assignments. Maybe other statements can be added in the future if needed. For the `inline` directive the correct name might be `forceinline` but I'm not sure ?
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