mirror of
https://github.com/intel/intel-graphics-compiler.git
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77 lines
2.7 KiB
C++
77 lines
2.7 KiB
C++
/*========================== begin_copyright_notice ============================
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Copyright (C) 2017-2021 Intel Corporation
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SPDX-License-Identifier: MIT
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============================= end_copyright_notice ===========================*/
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#include "Compiler/CISACodeGen/PositionDepAnalysis.hpp"
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#include "GenISAIntrinsics/GenIntrinsicInst.h"
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#include "Compiler/CodeGenPublic.h"
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#include "Compiler/IGCPassSupport.h"
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using namespace IGC;
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using namespace llvm;
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char PositionDepAnalysis::ID = 0;
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#define PASS_FLAG "PositionDepAnalysis"
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#define PASS_DESCRIPTION "Pos"
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#define PASS_CFG_ONLY true
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#define PASS_ANALYSIS true
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IGC_INITIALIZE_PASS_BEGIN(PositionDepAnalysis, PASS_FLAG, PASS_DESCRIPTION, PASS_CFG_ONLY, PASS_ANALYSIS)
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IGC_INITIALIZE_PASS_DEPENDENCY(WIAnalysis)
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IGC_INITIALIZE_PASS_DEPENDENCY(DominatorTreeWrapperPass)
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IGC_INITIALIZE_PASS_DEPENDENCY(LoopInfoWrapperPass)
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IGC_INITIALIZE_PASS_DEPENDENCY(MetaDataUtilsWrapper)
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IGC_INITIALIZE_PASS_END(PositionDepAnalysis, PASS_FLAG, PASS_DESCRIPTION, PASS_CFG_ONLY, PASS_ANALYSIS)
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namespace IGC {
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PositionDepAnalysis::PositionDepAnalysis() : FunctionPass(ID) {
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initializePositionDepAnalysisPass(*PassRegistry::getPassRegistry());
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}
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bool PositionDepAnalysis::runOnFunction(llvm::Function &F) {
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CodeGenContext *ctx = getAnalysis<CodeGenContextWrapper>().getCodeGenContext();
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m_newURBEncoding = ctx->platform.hasLSCUrbMessage();
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if (ctx->type == ShaderType::VERTEX_SHADER && ctx->m_DriverInfo.PreventZFighting()) {
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visit(F);
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}
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return false;
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}
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void PositionDepAnalysis::visitCallInst(CallInst &I) {
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if (GenIntrinsicInst *intr = dyn_cast<GenIntrinsicInst>(&I)) {
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if (intr->getIntrinsicID() == GenISAIntrinsic::GenISA_URBWrite) {
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if (ConstantInt *index = dyn_cast<ConstantInt>(intr->getOperand(0))) {
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// position is written at offset 0 or 1
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if (index->isZero() || (m_newURBEncoding && index->getZExtValue() == 16) ||
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(!m_newURBEncoding && index->isOne())) {
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unsigned int baseSourceIndex = index->isZero() ? 6 : 2;
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for (unsigned int i = 0; i < 4; i++) {
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if (Instruction *instDep = dyn_cast<Instruction>(intr->getOperand(baseSourceIndex + i))) {
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UpdateDependency(instDep);
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}
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}
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}
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}
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}
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}
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}
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void PositionDepAnalysis::UpdateDependency(Instruction *inst) {
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auto it = m_PositionDep.insert(inst);
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if (it.second) {
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for (unsigned int i = 0; i < inst->getNumOperands(); ++i) {
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if (Instruction *srcInst = dyn_cast<Instruction>(inst->getOperand(i))) {
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UpdateDependency(srcInst);
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}
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}
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}
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}
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bool PositionDepAnalysis::PositionDependsOnInst(Instruction *inst) {
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return m_PositionDep.find(inst) != m_PositionDep.end();
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}
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} // namespace IGC
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