SIL: add some Instruction/Builder APIs

* `var UncheckedValueCastInst.fromValue`
* `BeginApplyInst.isNonThrowing` and `BeginApplyInst.isNonAsync`
* `Builder.createUncheckedValueCast`

Author: eeckstein

SwiftCompilerSources/Sources/SIL/Builder.swift

@@ -289,6 +289,11 @@ public struct Builder {
     return notifyNew(cast.getAs(UncheckedAddrCastInst.self))
   }
 
+  public func createUncheckedValueCast(from value: Value, to type: Type) -> UncheckedValueCastInst {
+    let cast = bridged.createUncheckedValueCast(value.bridged, type.bridged)
+    return notifyNew(cast.getAs(UncheckedValueCastInst.self))
+  }
+
   public func createUpcast(from value: Value, to type: Type) -> UpcastInst {
     let cast = bridged.createUpcast(value.bridged, type.bridged)
     return notifyNew(cast.getAs(UpcastInst.self))

SwiftCompilerSources/Sources/SIL/Instruction.swift

@@ -788,7 +788,9 @@ final public class UncheckedTrivialBitCastInst : SingleValueInstruction, UnaryIn
 }
 
 final public class UncheckedBitwiseCastInst : SingleValueInstruction, UnaryInstruction {}
-final public class UncheckedValueCastInst : SingleValueInstruction, UnaryInstruction {}
+final public class UncheckedValueCastInst : SingleValueInstruction, UnaryInstruction {
+  public var fromValue: Value { operand.value }
+}
 
 final public class RefToRawPointerInst : SingleValueInstruction, UnaryInstruction {}
 final public class RefToUnmanagedInst : SingleValueInstruction, UnaryInstruction {}
@@ -1719,6 +1721,9 @@ final public class BeginApplyInst : MultipleValueInstruction, FullApplySite {
   public var yieldedValues: Results {
     Results(inst: self, numResults: resultCount - (isCalleeAllocated ? 2 : 1))
   }
+
+  public var isNonThrowing: Bool { bridged.BeginApplyInst_getNonThrowing() }
+  public var isNonAsync: Bool { bridged.BeginApplyInst_getNonAsync() }
 }
 
 final public class EndApplyInst : SingleValueInstruction, UnaryInstruction {

include/swift/SIL/SILBridging.h

@@ -816,6 +816,8 @@ struct BridgedInstruction {
   SWIFT_IMPORT_UNSAFE BRIDGED_INLINE BridgedGenericSpecializationInformation ApplyInst_getSpecializationInfo() const;
   BRIDGED_INLINE bool TryApplyInst_getNonAsync() const;
   SWIFT_IMPORT_UNSAFE BRIDGED_INLINE BridgedGenericSpecializationInformation TryApplyInst_getSpecializationInfo() const;
+  BRIDGED_INLINE bool BeginApplyInst_getNonThrowing() const;
+  BRIDGED_INLINE bool BeginApplyInst_getNonAsync() const;
   SWIFT_IMPORT_UNSAFE BRIDGED_INLINE BridgedDeclRef ClassMethodInst_getMember() const;
   SWIFT_IMPORT_UNSAFE BRIDGED_INLINE BridgedDeclRef WitnessMethodInst_getMember() const;
   SWIFT_IMPORT_UNSAFE BRIDGED_INLINE BridgedCanType WitnessMethodInst_getLookupType() const;
@@ -1229,6 +1231,8 @@ struct BridgedBuilder{
                                                                                BridgedType type) const;
   SWIFT_IMPORT_UNSAFE BRIDGED_INLINE BridgedInstruction createUncheckedAddrCast(BridgedValue op,
                                                                                 BridgedType type) const;
+  SWIFT_IMPORT_UNSAFE BRIDGED_INLINE BridgedInstruction createUncheckedValueCast(BridgedValue op,
+                                                                                 BridgedType type) const;
   SWIFT_IMPORT_UNSAFE BRIDGED_INLINE BridgedInstruction createUpcast(BridgedValue op, BridgedType type) const;
   SWIFT_IMPORT_UNSAFE BRIDGED_INLINE BridgedInstruction createCheckedCastAddrBranch(
       BridgedValue source, BridgedCanType sourceFormalType,

include/swift/SIL/SILBridgingImpl.h

@@ -1349,6 +1349,14 @@ BridgedGenericSpecializationInformation BridgedInstruction::TryApplyInst_getSpec
   return {getAs<swift::TryApplyInst>()->getSpecializationInfo()};
 }
 
+bool BridgedInstruction::BeginApplyInst_getNonThrowing() const {
+  return getAs<swift::BeginApplyInst>()->isNonThrowing();
+}
+
+bool BridgedInstruction::BeginApplyInst_getNonAsync() const {
+  return getAs<swift::BeginApplyInst>()->isNonAsync();
+}
+
 BridgedDeclRef BridgedInstruction::ClassMethodInst_getMember() const {
   return getAs<swift::ClassMethodInst>()->getMember();
 }
@@ -2301,6 +2309,11 @@ BridgedInstruction BridgedBuilder::createUncheckedAddrCast(BridgedValue op, Brid
                                               type.unbridged())};
 }
 
+BridgedInstruction BridgedBuilder::createUncheckedValueCast(BridgedValue op, BridgedType type) const {
+  return {unbridged().createUncheckedValueCast(regularLoc(), op.getSILValue(),
+                                              type.unbridged())};
+}
+
 BridgedInstruction BridgedBuilder::createUpcast(BridgedValue op, BridgedType type) const {
   return {unbridged().createUpcast(regularLoc(), op.getSILValue(),
                                    type.unbridged())};