Michael Gottesman 9864cb9c06 [polymorphic-builtins] Teach constant folding how to fold a polymorphic builtin to its static overload if the passed in type is a concrete builtin type ...

Specifically, this transforms:

builtin "generic_add"<Builtin.Vec4xInt32>(

  ->

builtin "add_Vec4xInt32"(

If we do not have a static overload for the type, we just leave the generic call
alone. If the generic builtin takes addresses as its arguments (i.e. 2x
in_guaranteed + 1x out), we load the arguments, evaluate the static overloaded
builtin and then store the result into the out parameter.

2019-09-19 17:10:14 -07:00

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