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[SILGen] Bootstrapping opaque values (#7113)

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[NFC] Add -enable-sil-opaque-values frontend option.

This will be used to change the SIL-level calling convention for opaque values,
such as generics and resilient structs, to pass-by-value.  Under this flag,
opaque values have SSA lifetimes, managed by copy_value and destroy_value.

This will make it easier to optimize copies and verify ownership.

* [SILGen] type lowering support for opaque values.

Add OpaqueValueTypeLowering.
Under EnableSILOpaqueValues, lower address-only types as opaque values.

* [SIL] Fix ValueOwnershipKind to support opaque SIL values.

* Test case: SILGen opaque value support for Parameter/ResultConvention.

* [SILGen] opaque value support for function arguments.

* Future Test case: SILGen opaque value specialDest arguments.

* Future Test case: SILGen opaque values: emitOpenExistential.

* Test case: SIL parsing support for EnableSILOpaqueValues.

* SILGen opaque values: prepareArchetypeCallee.

* [SIL Verify] allow copy_value for EnableSILOpaqueValues.

* Test cast: SIL serializer support for opaque values.

* Add a static_assert for ParameterConvention layout.

* Test case: Mandatory SILOpt support for EnableSILOpaqueValues.

* Test case: SILOpt support for EnableSILOpaqueValues.

* SILGen opaque values: TypeLowering emitCopyValue.

* SILBuilder createLoad. Allow loading opaque values.

* SIL Verifier. Allow loading and storing opaque values.

* SILGen emitSemanticStore support for opaque values.

* Test case for SILGen emitSemanticStore.

* Test case for SIL mandatory support for inout assignment.

* Fix SILGen opaque values test case after rebasing.
This commit is contained in:
Andrew Trick
2017-01-27 18:56:53 -08:00
committed by GitHub
parent 51bdd6f09b
commit e9c559b718
22 changed files with 429 additions and 56 deletions
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5
include/swift/Basic/LangOptions.h
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@@ -163,6 +163,11 @@ namespace swift {
/// and methods.
bool InferImportAsMember = false;
/// If set to true, compile with the SIL Opaque Values enabled.
/// This is for bootstrapping. It can't be in SILOptions because the
/// TypeChecker uses it to set resolve the ParameterConvention.
bool EnableSILOpaqueValues = false;
/// Sets the target we are building for and updates platform conditions
/// to match.
///