Make IntegerLiteral, FloatLiteral, and StringLiteral own their own copies of their values so they don't depend on the AST. Remove the now-redundant IntegerValueInst, which only existed to be a non-AST-dependent variant of IntegerLiteral.
Swift SVN r5045
We don't want to have to recover from a mangled name whether a function call is to an IRGen-lowered builtin, so add an instruction for referencing builtins.
Swift SVN r4919
Move AbstractCC into SILType and make it an attribute of SILTypes for functions. Add a ConvertCCInst to represent calling convention conversions. Give SILFunctions a linkage attribute. Add logic to SILGen to calculate these attributes for SILConstants based on their attached decls.
IRGen doesn't use these new attributes yet. I'll hook that up when I move mangling over.
Swift SVN r4886
Replace 'constant_ref' with 'function_ref', which references a SILFunction directly, and 'global_addr', which references a global variable VarDecl. Get rid of the SILConstant-to-SILFunction mapping in SILModule and replace it with an ilist of SILFunctions. Allow SILFunctions to be 'external' by not having any blocks in their body.
For now, SILFunctions still carry around their SILConstant "name", because name mangling and IRGen still rely on access to the original decl in order to recover IRGen information, which unfortunately leaves IRGen's CodeRefs in a gross, awkward intermediate state. Lifting mangling, AbstractCC, and other linkage attributes to SIL should clear up this up.
Swift SVN r4865
The value semantics primitives load/move/assign/init/destroy lower trivially to SIL value semantics operators, and the bridge casting operations introduce r/r semantics that should be visible to the ARC optimizer, so move the lowering for these builtins up to SILGen. Add a BUILTIN_SIL_OPERATION metaprogramming macro to Builtins.def, and add a facility similar to IRGen's former SpecializedCallEmission so we can handle builtin call emissions as special cases.
This also sets up the framework for eventually reintroducing special-case handling of known functions like &&, ||, Bool.getLogicValue, Int.convertFromIntegerLiteral, etc. in SILGen.
Swift SVN r4862
Add an IsaInst to represent type tests, and implement SILGen for IsSubtypeExpr AST nodes. Get rid of SuperIsArchetypeExpr because it's not really necessary to have it different from IsaSubtype--the SIL and IR behavior is identical.
Swift SVN r4855
Create a UnaryInstructionBase that factors all the boilerplate out of all the unary instructions. It'll be easy to generalize to all fixed-arity instructions, but let's start simple. No functionality change.
Swift SVN r4854
Teach SILGen how to emit the implicit elementwise constructor for structs and the implicit default constructor for classes, and eliminate the now dead IRGen code for them. Add a StructInst SIL instruction to represent constructing a loadable struct value from elements, analogous to TupleInst for tuples.
Swift SVN r4778
When lowering SIL builtin ConstantRefs, just stash away the FuncDecl, and pass that decl on to a tweaked version of emitBuiltinCall when the constant is applied.
Swift SVN r4736
Otherwise we try to release junk pointers when we reassign class fields in the struct. Add an attribute to InitializeVarInst so that when dataflow analysis comes online, it knows that these InitializeVars need to be eliminated and can't be lowered to default constructor calls (since we're already in a constructor).
Swift SVN r4730
take a const ValueBase* instead of a SILValue, implement SILArgument
cases for a few visitors and opt others out explicitly, and assert
that classes in the SIL value hierarchy override their superclass's
classof.
Swift SVN r4705
