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Fix issue #313: Catch internal attempts to modify built-in symbols that don't exist.

Browse source 
Also beefed up support for running compute shaders is #version 420, but this
work is only partially done.
This commit is contained in:
John Kessenich 2016-05-29 18:24:31 -06:00
parent 5a7f0eff69
commit 0f5e3ad23c
6 changed files with 70 additions and 7 deletions
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20
glslang/MachineIndependent/ParseHelper.cpp
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@ -622,10 +622,20 @@ void TParseContext::makeEditable(TSymbol*& symbol)
intermediate.addSymbolLinkageNode(linkage, *symbol);
}
// Return a writable version of the variable 'name'.
//
// Return nullptr if 'name' is not found. This should mean
// something is seriously wrong (e.g., compiler asking self for
// built-in that doesn't exist).
TVariable* TParseContext::getEditableVariable(const char* name)
{
bool builtIn;
TSymbol* symbol = symbolTable.find(name, &builtIn);
assert(symbol != nullptr);
if (symbol == nullptr)
return nullptr;
if (builtIn)
makeEditable(symbol);
@ -3844,7 +3854,7 @@ void TParseContext::finalErrorCheck()
break;
case EShLangCompute:
if (profile != EEsProfile && version < 430)
requireExtensions(getCurrentLoc(), 1, &E_GL_ARB_compute_shader, "tessellation shaders");
requireExtensions(getCurrentLoc(), 1, &E_GL_ARB_compute_shader, "compute shaders");
break;
default:
break;
@ -4222,6 +4232,8 @@ void TParseContext::setLayoutQualifier(const TSourceLoc& loc, TPublicType& publi
case EShLangCompute:
if (id.compare(0, 11, "local_size_") == 0) {
profileRequires(loc, EEsProfile, 310, 0, "gl_WorkgroupSize");
profileRequires(loc, ~EEsProfile, 430, E_GL_ARB_compute_shader, "gl_WorkgroupSize");
if (id == "local_size_x") {
publicType.shaderQualifiers.localSize[0] = value;
return;
@ -5967,7 +5979,8 @@ void TParseContext::updateStandaloneQualifierDefaults(const TSourceLoc& loc, con
// Fix the existing constant gl_WorkGroupSize with this new information.
TVariable* workGroupSize = getEditableVariable("gl_WorkGroupSize");
workGroupSize->getWritableConstArray()[i].setUConst(intermediate.getLocalSize(i));
if (workGroupSize != nullptr)
workGroupSize->getWritableConstArray()[i].setUConst(intermediate.getLocalSize(i));
}
} else
error(loc, "can only apply to 'in'", "local_size", "");
@ -5980,7 +5993,8 @@ void TParseContext::updateStandaloneQualifierDefaults(const TSourceLoc& loc, con
error(loc, "can only apply to 'in'", "local_size id", "");
// Set the workgroup built-in variable as a specialization constant
TVariable* workGroupSize = getEditableVariable("gl_WorkGroupSize");
workGroupSize->getWritableType().getQualifier().specConstant = true;
if (workGroupSize != nullptr)
workGroupSize->getWritableType().getQualifier().specConstant = true;
}
}
if (publicType.shaderQualifiers.earlyFragmentTests) {