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SPV: Handle stride decorations for arrays of arrays, and using multiple type instances when strides are used.

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This commit is contained in:
John Kessenich 2015-12-29 21:27:24 -07:00
parent 4998789d4e
commit c9e0a42b92
5 changed files with 277 additions and 249 deletions
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19
SPIRV/SpvBuilder.cpp
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@ -281,18 +281,23 @@ Id Builder::makeMatrixType(Id component, int cols, int rows)
return type->getResultId();
}
Id Builder::makeArrayType(Id element, unsigned size)
// TODO: performance: track arrays per stride
// If a stride is supplied (non-zero) make an array.
// If no stride (0), reuse previous array types.
Id Builder::makeArrayType(Id element, unsigned size, int stride)
{
// First, we need a constant instruction for the size
Id sizeId = makeUintConstant(size);
// try to find existing type
Instruction* type;
for (int t = 0; t < (int)groupedTypes[OpTypeArray].size(); ++t) {
type = groupedTypes[OpTypeArray][t];
if (type->getIdOperand(0) == element &&
type->getIdOperand(1) == sizeId)
return type->getResultId();
if (stride == 0) {
// try to find existing type
for (int t = 0; t < (int)groupedTypes[OpTypeArray].size(); ++t) {
type = groupedTypes[OpTypeArray][t];
if (type->getIdOperand(0) == element &&
type->getIdOperand(1) == sizeId)
return type->getResultId();
}
}
// not found, make it