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GLSL: Separate out swizzle handling (potentially fixing bugs).

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Noticed this when looking at swizzles.  It's at least better structure,
removing hard-to-see early returns, which might be contributing to bugs.
This commit is contained in:
John Kessenich 2020-05-01 03:07:54 -06:00
parent bfaf88ee6a
commit 2ac3c5b6d6
2 changed files with 56 additions and 44 deletions
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83
glslang/MachineIndependent/ParseHelper.cpp
View File

@ -822,6 +822,53 @@ TIntermTyped* TParseContext::handleDotDereference(const TSourceLoc& loc, TInterm
TIntermTyped* result = base;
if ((base->isVector() || base->isScalar()) &&
(base->isFloatingDomain() || base->isIntegerDomain() || base->getBasicType() == EbtBool)) {
result = handleDotSwizzle(loc, base, field);
} else if (base->isStruct() || base->isReference()) {
const TTypeList* fields = base->isReference() ?
base->getType().getReferentType()->getStruct() :
base->getType().getStruct();
bool fieldFound = false;
int member;
for (member = 0; member < (int)fields->size(); ++member) {
if ((*fields)[member].type->getFieldName() == field) {
fieldFound = true;
break;
}
}
if (fieldFound) {
if (base->getType().getQualifier().isFrontEndConstant())
result = intermediate.foldDereference(base, member, loc);
else {
blockMemberExtensionCheck(loc, base, member, field);
TIntermTyped* index = intermediate.addConstantUnion(member, loc);
result = intermediate.addIndex(EOpIndexDirectStruct, base, index, loc);
result->setType(*(*fields)[member].type);
if ((*fields)[member].type->getQualifier().isIo())
intermediate.addIoAccessed(field);
}
inheritMemoryQualifiers(base->getQualifier(), result->getWritableType().getQualifier());
} else
error(loc, "no such field in structure", field.c_str(), "");
} else
error(loc, "does not apply to this type:", field.c_str(), base->getType().getCompleteString().c_str());
// Propagate noContraction up the dereference chain
if (base->getQualifier().isNoContraction())
result->getWritableType().getQualifier().setNoContraction();
// Propagate nonuniform
if (base->getQualifier().isNonUniform())
result->getWritableType().getQualifier().nonUniform = true;
return result;
}
//
// Handle seeing a base.swizzle, a subset of base.identifier in the grammar.
//
TIntermTyped* TParseContext::handleDotSwizzle(const TSourceLoc& loc, TIntermTyped* base, const TString& field)
{
TIntermTyped* result = base;
if (base->isScalar()) {
const char* dotFeature = "scalar swizzle";
requireProfile(loc, ~EEsProfile, dotFeature);
@ -866,42 +913,6 @@ TIntermTyped* TParseContext::handleDotDereference(const TSourceLoc& loc, TInterm
if (base->getType().getQualifier().isSpecConstant())
result->getWritableType().getQualifier().makeSpecConstant();
}
} else if (base->isStruct() || base->isReference()) {
const TTypeList* fields = base->isReference() ?
base->getType().getReferentType()->getStruct() :
base->getType().getStruct();
bool fieldFound = false;
int member;
for (member = 0; member < (int)fields->size(); ++member) {
if ((*fields)[member].type->getFieldName() == field) {
fieldFound = true;
break;
}
}
if (fieldFound) {
if (base->getType().getQualifier().isFrontEndConstant())
result = intermediate.foldDereference(base, member, loc);
else {
blockMemberExtensionCheck(loc, base, member, field);
TIntermTyped* index = intermediate.addConstantUnion(member, loc);
result = intermediate.addIndex(EOpIndexDirectStruct, base, index, loc);
result->setType(*(*fields)[member].type);
if ((*fields)[member].type->getQualifier().isIo())
intermediate.addIoAccessed(field);
}
inheritMemoryQualifiers(base->getQualifier(), result->getWritableType().getQualifier());
} else
error(loc, "no such field in structure", field.c_str(), "");
} else
error(loc, "does not apply to this type:", field.c_str(), base->getType().getCompleteString().c_str());
// Propagate noContraction up the dereference chain
if (base->getQualifier().isNoContraction())
result->getWritableType().getQualifier().setNoContraction();
// Propagate nonuniform
if (base->getQualifier().isNonUniform())
result->getWritableType().getQualifier().nonUniform = true;
return result;
}

1
glslang/MachineIndependent/ParseHelper.h
View File

@ -315,6 +315,7 @@ public:
TIntermTyped* handleBinaryMath(const TSourceLoc&, const char* str, TOperator op, TIntermTyped* left, TIntermTyped* right);
TIntermTyped* handleUnaryMath(const TSourceLoc&, const char* str, TOperator op, TIntermTyped* childNode);
TIntermTyped* handleDotDereference(const TSourceLoc&, TIntermTyped* base, const TString& field);
TIntermTyped* handleDotSwizzle(const TSourceLoc&, TIntermTyped* base, const TString& field);
void blockMemberExtensionCheck(const TSourceLoc&, const TIntermTyped* base, int member, const TString& memberName);
TFunction* handleFunctionDeclarator(const TSourceLoc&, TFunction& function, bool prototype);
TIntermAggregate* handleFunctionDefinition(const TSourceLoc&, TFunction&);