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[dxvk] Don't duplicate geometry shader system value outputs

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Fixes #1121. The basic idea here is that all built-ins that can be
written by the GS will be consumed as built-ins by the FS anyway,
so we do not need to keep the o# variable around.
This commit is contained in:
Philip Rebohle 2019-07-24 18:18:20 +02:00
parent eaa41eb76c
commit 9c5102e257
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1 changed files with 6 additions and 0 deletions
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6
src/dxbc/dxbc_compiler.cpp
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@ -723,6 +723,12 @@ namespace dxvk {
if (m_moduleInfo.xfb != nullptr)
info.sclass = spv::StorageClassPrivate;
// In geometry shaders, don't duplicate system value outputs
// to stay within device limits. The pixel shader will read
// all GS system value outputs as system value inputs.
if (m_programInfo.type() == DxbcProgramType::GeometryShader && sv != DxbcSystemValue::None)
info.sclass = spv::StorageClassPrivate;
const uint32_t varId = this->emitNewVariable(info);
m_module.setDebugName(varId, str::format("o", regIdx).c_str());