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HLSL: HS return is arrayed to match SPIR-V semantics

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HLSL HS outputs a per ctrl point value, and the DS reads an array
of that type.  (It also has a per patch frequency).  The per-ctrl-pt
frequency is arrayed on just one side, as opposed to SPIR-V which
is arrayed on both.  To match semantics, the compiler creates an
array behind the scenes and indexes it by invocation ID, assigning
the HS return value to it.
This commit is contained in:
steve-lunarg 2017-03-22 18:39:25 -06:00
parent 7afe1344ca
commit e752f463c5
6 changed files with 477 additions and 382 deletions
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4
hlsl/hlslParseHelper.h
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@ -80,6 +80,7 @@ public:
void handleFunctionDeclarator(const TSourceLoc&, TFunction& function, bool prototype);
TIntermAggregate* handleFunctionDefinition(const TSourceLoc&, TFunction&, const TAttributeMap&, TIntermNode*& entryPointTree);
TIntermNode* transformEntryPoint(const TSourceLoc&, TFunction&, const TAttributeMap&);
void handleEntryPointAttributes(const TSourceLoc&, TFunction&, const TAttributeMap&);
void handleFunctionBody(const TSourceLoc&, TFunction&, TIntermNode* functionBody, TIntermNode*& node);
void remapEntryPointIO(TFunction& function, TVariable*& returnValue, TVector<TVariable*>& inputs, TVector<TVariable*>& outputs);
void remapNonEntryPointIO(TFunction& function);
@ -283,6 +284,9 @@ protected:
void finish() override; // post-processing
// Linkage symbol helpers
TIntermSymbol* findLinkageSymbol(TBuiltInVariable biType) const;
// Current state of parsing
struct TPragma contextPragma;
int loopNestingLevel; // 0 if outside all loops