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SPV: Use heuristic to avoid geometry multi-streams when possible.

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This commit is contained in:
John Kessenich 2016-03-03 22:29:11 -07:00
parent 2ac71dfb78
commit f2d8a5c53f
4 changed files with 14 additions and 6 deletions
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4
SPIRV/GlslangToSpv.cpp
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@ -1803,7 +1803,7 @@ spv::Id TGlslangToSpvTraverser::convertGlslangToSpvType(const glslang::TType& ty
// Decorate the structure
addDecoration(spvType, TranslateLayoutDecoration(type, qualifier.layoutMatrix));
addDecoration(spvType, TranslateBlockDecoration(type));
if (type.getQualifier().hasStream()) {
if (type.getQualifier().hasStream() && glslangIntermediate->isMultiStream()) {
builder.addCapability(spv::CapabilityGeometryStreams);
builder.addDecoration(spvType, spv::DecorationStream, type.getQualifier().layoutStream);
}
@ -3599,7 +3599,7 @@ spv::Id TGlslangToSpvTraverser::getSymbolId(const glslang::TIntermSymbol* symbol
}
addDecoration(id, TranslateInvariantDecoration(symbol->getType().getQualifier()));
if (symbol->getQualifier().hasStream()) {
if (symbol->getQualifier().hasStream() && glslangIntermediate->isMultiStream()) {
builder.addCapability(spv::CapabilityGeometryStreams);
builder.addDecoration(id, spv::DecorationStream, symbol->getQualifier().layoutStream);
}

3
Test/baseResults/spv.330.geom.out
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@ -9,7 +9,6 @@ Linked geometry stage:
Capability Geometry
Capability ClipDistance
Capability GeometryStreams
1: ExtInstImport "GLSL.std.450"
MemoryModel Logical GLSL450
EntryPoint Geometry 4 "main" 13 20
@ -31,8 +30,6 @@ Linked geometry stage:
MemberDecorate 11(gl_PerVertex) 0 BuiltIn Position
MemberDecorate 11(gl_PerVertex) 1 BuiltIn ClipDistance
Decorate 11(gl_PerVertex) Block
Decorate 11(gl_PerVertex) Stream 0
Decorate 13 Stream 0
MemberDecorate 16(gl_PerVertex) 0 BuiltIn Position
MemberDecorate 16(gl_PerVertex) 1 BuiltIn ClipDistance
Decorate 16(gl_PerVertex) Block

7
glslang/MachineIndependent/ParseHelper.cpp
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@ -1524,6 +1524,11 @@ void TParseContext::builtInOpCheck(const TSourceLoc& loc, const TFunction& fnCan
}
break;
case EOpEmitStreamVertex:
case EOpEndStreamPrimitive:
intermediate.setMultiStream();
break;
default:
break;
}
@ -4050,6 +4055,8 @@ void TParseContext::setLayoutQualifier(const TSourceLoc& loc, TPublicType& publi
if (id == "stream") {
requireProfile(loc, ~EEsProfile, "selecting output stream");
publicType.qualifier.layoutStream = value;
if (value > 0)
intermediate.setMultiStream();
return;
}
break;

6
glslang/MachineIndependent/localintermediate.h
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@ -128,7 +128,8 @@ public:
numMains(0), numErrors(0), numPushConstants(0), recursive(false),
invocations(TQualifier::layoutNotSet), vertices(TQualifier::layoutNotSet), inputPrimitive(ElgNone), outputPrimitive(ElgNone),
pixelCenterInteger(false), originUpperLeft(false),
vertexSpacing(EvsNone), vertexOrder(EvoNone), pointMode(false), earlyFragmentTests(false), depthLayout(EldNone), depthReplacing(false), blendEquations(0), xfbMode(false)
vertexSpacing(EvsNone), vertexOrder(EvoNone), pointMode(false), earlyFragmentTests(false), depthLayout(EldNone), depthReplacing(false), blendEquations(0),
multiStream(false), xfbMode(false)
{
localSize[0] = 1;
localSize[1] = 1;
@ -271,6 +272,8 @@ public:
void setXfbMode() { xfbMode = true; }
bool getXfbMode() const { return xfbMode; }
void setMultiStream() { multiStream = true; }
bool isMultiStream() const { return multiStream; }
bool setOutputPrimitive(TLayoutGeometry p)
{
if (outputPrimitive != ElgNone)
@ -361,6 +364,7 @@ protected:
bool depthReplacing;
int blendEquations; // an 'or'ing of masks of shifts of TBlendEquationShift
bool xfbMode;
bool multiStream;
typedef std::list<TCall> TGraph;
TGraph callGraph;