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WIP: HLSL: structuredbuffer counter functionality

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This is WIP, heavy on the IP part.  There's not yet enough to use in real workloads.

Currently present:

* Creation of separate counter buffers for structured buffer types needing them.
* IncrementCounter / DecrementCounter methods
* Postprocess to remove unused counter buffers from linkage
* Associated counter buffers are given @count suffix (invalid as a user identifier)

Not yet present:

* reflection queries to obtain bindings for counter buffers
* Append/Consume buffers
* Ability to use SB references passed as fn parameters
This commit is contained in:
steve-lunarg
2017-04-10 08:19:21 -06:00
parent d1141843c0
commit 8e26feb8f2
9 changed files with 520 additions and 24 deletions
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12
hlsl/hlslParseHelper.h
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@@ -146,6 +146,7 @@ public:
TIntermTyped* constructAggregate(TIntermNode*, const TType&, int, const TSourceLoc&);
TIntermTyped* constructBuiltIn(const TType&, TOperator, TIntermTyped*, const TSourceLoc&, bool subset);
void declareBlock(const TSourceLoc&, TType&, const TString* instanceName = 0, TArraySizes* arraySizes = 0);
void declareStructBufferCounter(const TSourceLoc& loc, const TType& bufferType, const TString& name);
void fixBlockLocations(const TSourceLoc&, TQualifier&, TTypeList&, bool memberWithLocation, bool memberWithoutLocation);
void fixBlockXfbOffsets(TQualifier&, TTypeList&);
void fixBlockUniformOffsets(const TQualifier&, TTypeList&);
@@ -274,11 +275,19 @@ protected:
TType* getStructBufferContentType(const TType& type) const;
bool isStructBufferType(const TType& type) const { return getStructBufferContentType(type) != nullptr; }
TIntermTyped* indexStructBufferContent(const TSourceLoc& loc, TIntermTyped* buffer) const;
TIntermTyped* getStructBufferCounter(const TSourceLoc& loc, TIntermTyped* buffer);
// Return true if this type is a reference. This is not currently a type method in case that's
// a language specific answer.
bool isReference(const TType& type) const { return isStructBufferType(type); }
// Return true if this a buffer type that has an associated counter buffer.
bool hasStructBuffCounter(const TString& name) const;
// Finalization step: remove unused buffer blocks from linkage (we don't know until the
// shader is entirely compiled)
void removeUnusedStructBufferCounters();
// Pass through to base class after remembering builtin mappings.
using TParseContextBase::trackLinkage;
void trackLinkage(TSymbol& variable) override;
@@ -366,6 +375,9 @@ protected:
// Structuredbuffer shared types. Typically there are only a few.
TVector<TType*> structBufferTypes;
TMap<TString, TBuiltInVariable> structBufferBuiltIn;
TMap<TString, bool> structBufferCounter;
// The builtin interstage IO map considers e.g, EvqPosition on input and output separately, so that we
// can build the linkage correctly if position appears on both sides. Otherwise, multiple positions