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[Serialization] Drop decls whose types can't be deserialized.

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Proof-of-concept for the above. This shouldn't be common---renames are
far more likely, and those we can track---but occurs when the
swift_wrapper attribute (the implementation of NS_STRING_ENUM) is
active in Swift 4 but not in Swift 3.

Note that this only checks the canonical interface type of the
declaration, because the non-canonical type may contain references to
the declaration's generic parameters.
This commit is contained in:
Jordan Rose
2017-04-26 17:47:19 -07:00
parent 10c62545c8
commit 1168cacf4f
7 changed files with 158 additions and 50 deletions
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10
include/swift/Serialization/ModuleFormat.h
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@@ -44,7 +44,7 @@ const unsigned char MODULE_DOC_SIGNATURE[] = { 0xE2, 0x9C, 0xA8, 0x07 };
/// Serialized module format major version number.
///
/// Always 0 for Swift 1.x - 3.x.
/// Always 0 for Swift 1.x - 4.x.
const uint16_t VERSION_MAJOR = 0;
/// Serialized module format minor version number.
@@ -54,7 +54,7 @@ const uint16_t VERSION_MAJOR = 0;
/// in source control, you should also update the comment to briefly
/// describe what change you made. The content of this comment isn't important;
/// it just ensures a conflict if two people change the module format.
const uint16_t VERSION_MINOR = 338; // Last change: OPERAND_WITH_ATTR format.
const uint16_t VERSION_MINOR = 339; // Last change: member canonical types
using DeclID = PointerEmbeddedInt<unsigned, 31>;
using DeclIDField = BCFixed<31>;
@@ -858,7 +858,8 @@ namespace decls_block {
BCFixed<1>, // throws?
CtorInitializerKindField, // initializer kind
GenericEnvironmentIDField, // generic environment
TypeIDField, // type (interface)
TypeIDField, // interface type
TypeIDField, // canonical interface type
DeclIDField, // overridden decl
AccessibilityKindField, // accessibility
BCArray<IdentifierIDField> // argument names
@@ -877,6 +878,7 @@ namespace decls_block {
BCFixed<1>, // HasNonPatternBindingInit?
StorageKindField, // StorageKind
TypeIDField, // interface type
TypeIDField, // canonical interface type
DeclIDField, // getter
DeclIDField, // setter
DeclIDField, // materializeForSet
@@ -911,6 +913,7 @@ namespace decls_block {
BCVBR<5>, // number of parameter patterns
GenericEnvironmentIDField, // generic environment
TypeIDField, // interface type
TypeIDField, // canonical interface type
DeclIDField, // operator decl
DeclIDField, // overridden function
DeclIDField, // AccessorStorageDecl
@@ -982,6 +985,7 @@ namespace decls_block {
StorageKindField, // StorageKind
GenericEnvironmentIDField, // generic environment
TypeIDField, // interface type
TypeIDField, // canonical interface type
DeclIDField, // getter
DeclIDField, // setter
DeclIDField, // materializeForSet