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[sil-combine] Minor clean-up of casts optimizations. NFC.

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Add more checks and logic into emitSuccessfulIndirectUnconditionalCast and emitSuccessfulScalarUnconditionalCast, so that its clients in sil-combine can be simplified by avoiding looking into special cases.

Swift SVN r26885
This commit is contained in:
Roman Levenstein
2015-04-02 19:57:35 +00:00
parent fc1c526f27
commit 55ea9ec0e3
3 changed files with 85 additions and 77 deletions
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48
include/swift/SIL/DynamicCasts.h
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@@ -42,38 +42,38 @@ enum class DynamicCastFeasibility {
/// Classify the feasibility of a dynamic cast. The source and target
/// types should be unlowered formal types.
DynamicCastFeasibility classifyDynamicCast(Module *context,
CanType sourceType,
CanType targetType,
bool isSourceTypeExact = false,
bool isWholdModuleOpts = false);
DynamicCastFeasibility classifyDynamicCast(
Module *context,
CanType sourceType, CanType targetType,
bool isSourceTypeExact = false,
bool isWholdModuleOpts = false);
SILValue emitSuccessfulScalarUnconditionalCast(SILBuilder &B, Module *M,
SILLocation loc, SILValue value,
SILType loweredTargetType,
CanType formalSourceType,
CanType formalTargetType);
SILValue emitSuccessfulScalarUnconditionalCast(
SILBuilder &B, Module *M, SILLocation loc, SILValue value,
SILType loweredTargetType,
CanType formalSourceType, CanType formalTargetType,
SILInstruction *existingCast = nullptr);
void emitSuccessfulIndirectUnconditionalCast(SILBuilder &B, Module *M,
SILLocation loc,
CastConsumptionKind consumption,
SILValue src, CanType sourceType,
SILValue dest, CanType targetType);
bool emitSuccessfulIndirectUnconditionalCast(
SILBuilder &B, Module *M, SILLocation loc,
CastConsumptionKind consumption,
SILValue src, CanType sourceType,
SILValue dest, CanType targetType,
SILInstruction *existingCast = nullptr);
/// Can the given cast be performed by the scalar checked-cast
/// instructions, or does we need to use the indirect instructions?
bool canUseScalarCheckedCastInstructions(SILModule &M, CanType sourceType,
CanType targetType);
bool canUseScalarCheckedCastInstructions(
SILModule &M, CanType sourceType, CanType targetType);
/// Carry out the operations required for an indirect conditional cast
/// using a scalar cast operation.
void emitIndirectConditionalCastWithScalar(SILBuilder &B, Module *M,
SILLocation loc,
CastConsumptionKind consumption,
SILValue src, CanType sourceType,
SILValue dest, CanType targetType,
SILBasicBlock *trueBB,
SILBasicBlock *falseBB);
void emitIndirectConditionalCastWithScalar(
SILBuilder &B, Module *M, SILLocation loc,
CastConsumptionKind consumption,
SILValue src, CanType sourceType,
SILValue dest, CanType targetType,
SILBasicBlock *trueBB, SILBasicBlock *falseBB);
/// \brief Does the type conform to the _ObjectiveCBridgeable protocol.
bool isObjectiveCBridgeable(Module *M, CanType Ty);