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[dxbc] Declare length of shader input array late

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Otherwise, we generate out-of-bounds array reads and writes
in broken ENB shaders.
This commit is contained in:
Philip Rebohle 2019-10-23 16:36:52 +02:00
parent df61a479a2
commit 2d6a3396dd
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GPG Key ID: C8CC613427A31C99
2 changed files with 15 additions and 7 deletions
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17
src/dxbc/dxbc_compiler.cpp
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@ -677,6 +677,7 @@ namespace dxvk {
// Declare the input slot as defined
m_interfaceSlots.inputSlots |= 1u << regIdx;
m_vArrayLength = std::max(m_vArrayLength, regIdx + 1);
} else if (sv != DxbcSystemValue::None) {
// Add a new system value mapping if needed
bool skipSv = sv == DxbcSystemValue::ClipDistance
@ -5682,6 +5683,8 @@ namespace dxvk {
void DxbcCompiler::emitInputSetup() {
m_module.setLateConst(m_vArrayLengthId, &m_vArrayLength);
// Copy all defined v# registers into the input array
const uint32_t vecTypeId = m_module.defVectorType(m_module.defFloatType(32), 4);
const uint32_t ptrTypeId = m_module.defPointerType(vecTypeId, spv::StorageClassPrivate);
@ -5727,6 +5730,8 @@ namespace dxvk {
void DxbcCompiler::emitInputSetup(uint32_t vertexCount) {
m_module.setLateConst(m_vArrayLengthId, &m_vArrayLength);
// Copy all defined v# registers into the input array. Note
// that the outer index of the array is the vertex index.
const uint32_t vecTypeId = m_module.defVectorType(m_module.defFloatType(32), 4);
@ -7027,18 +7032,18 @@ namespace dxvk {
void DxbcCompiler::emitDclInputArray(uint32_t vertexCount) {
DxbcArrayType info;
DxbcVectorType info;
info.ctype = DxbcScalarType::Float32;
info.ccount = 4;
info.alength = m_isgn != nullptr ? m_isgn->maxRegisterCount() : 0;
if (info.alength == 0)
return;
// Define the array type. This will be two-dimensional
// in some shaders, with the outer index representing
// the vertex ID within an invocation.
uint32_t arrayTypeId = getArrayTypeId(info);
m_vArrayLength = m_isgn != nullptr ? m_isgn->maxRegisterCount() : 1;
m_vArrayLengthId = m_module.lateConst32(getScalarTypeId(DxbcScalarType::Uint32));
uint32_t vectorTypeId = getVectorTypeId(info);
uint32_t arrayTypeId = m_module.defArrayType(vectorTypeId, m_vArrayLengthId);
if (vertexCount != 0) {
arrayTypeId = m_module.defArrayType(

3
src/dxbc/dxbc_compiler.h
View File

@ -476,6 +476,9 @@ namespace dxvk {
///////////////////////////////////////////////////////////
// Array of input values. Since v# registers are indexable
// in DXBC, we need to copy them into an array first.
uint32_t m_vArrayLength = 0;
uint32_t m_vArrayLengthId = 0;
uint32_t m_vArray = 0;
////////////////////////////////////////////////////