From ac886fd3e329a9599ed1ac7a6d8b26ca5821046c Mon Sep 17 00:00:00 2001
From: Yong He <yonghe@outlook.com>
Date: Wed, 4 Oct 2023 11:20:35 -0700
Subject: SPIRV compiler performance fixes. (#3258)

* SPIRV compiler performance fixes.

* Cleanup.

* update project files

* Cleanup debug code.

* Make redundancy removal non-recursive.

---------

Co-authored-by: Yong He <yhe@nvidia.com>
---
 source/slang/slang-ir-array-reg-to-mem.cpp | 88 ------------------------------
 1 file changed, 88 deletions(-)
 delete mode 100644 source/slang/slang-ir-array-reg-to-mem.cpp

(limited to 'source/slang/slang-ir-array-reg-to-mem.cpp')

diff --git a/source/slang/slang-ir-array-reg-to-mem.cpp b/source/slang/slang-ir-array-reg-to-mem.cpp
deleted file mode 100644
index 34bd5b148..000000000
--- a/source/slang/slang-ir-array-reg-to-mem.cpp
+++ /dev/null
@@ -1,88 +0,0 @@
-#include "slang-ir-array-reg-to-mem.h"
-
-#include "slang-ir.h"
-#include "slang-ir-insts.h"
-#include "slang-ir-util.h"
-
-namespace Slang
-{
-    bool eliminateArrayTypeParameters(IRFunc* func)
-    {
-        IRBuilder builder(func);
-        bool changed = false;
-        List<UInt> arrayParamIds;
-        UInt idx = 0;
-        List<IRParam*> paramWorkList;
-        for (auto param : func->getParams())
-        {
-            if (auto arrayType = as<IRArrayTypeBase>(param->getFullType()))
-            {
-                paramWorkList.add(param);
-                arrayParamIds.add(idx);
-            }
-            idx++;
-        }
-        for (auto param : paramWorkList)
-        {
-            // We have an array type parameter, so we need to replace it with a pointer to the array
-            // type.
-            //
-            // We will also need to insert a `load` instruction at the start of the function body
-            // to load the actual pointer value from the parameter.
-            //
-            if (auto arrayType = as<IRArrayTypeBase>(param->getFullType()))
-            {
-                changed = true;
-                auto ptrArrayType = builder.getPtrType(arrayType);
-                auto newParam = builder.createParam(ptrArrayType);
-                newParam->insertBefore(param);
-                setInsertAfterOrdinaryInst(&builder, param);
-                auto regVal = builder.emitLoad(newParam);
-                param->replaceUsesWith(regVal);
-                param->removeAndDeallocate();
-            }
-        }
-        if (changed)
-        {
-            // The function is modified, we need to also update its type.
-            List<IRType*> paramTypes;
-            for (auto param : func->getParams())
-            {
-                paramTypes.add(param->getFullType());
-            }
-            auto newFuncType = builder.getFuncType((UInt)paramTypes.getCount(), paramTypes.getBuffer(), func->getResultType());
-            func->setFullType(newFuncType);
-
-            // Update all the call sites to pass the arrays by pointer.
-            traverseUses(func, [&](IRUse* use)
-                {
-                    if (const auto call = as<IRCall>(use->getUser()))
-                    {
-                        builder.setInsertBefore(call);
-                        for (auto paramId : arrayParamIds)
-                        {
-                            auto arg = call->getArg(paramId);
-                            SLANG_ASSERT(as<IRPtrTypeBase>(paramTypes[paramId]));
-                            auto var = builder.emitVar(as<IRPtrTypeBase>(paramTypes[paramId])->getValueType());
-                            builder.emitStore(var, arg);
-                            call->setArg(paramId, var);
-                        }
-                    }
-                });
-        }
-        return changed;
-    }
-
-    bool eliminateArrayTypeSSARegisters(IRModule* module)
-    {
-        bool changed = false;
-        for (auto inst : module->getGlobalInsts())
-        {
-            if (auto func = as<IRFunc>(inst))
-            {
-                changed |= eliminateArrayTypeParameters(func);
-            }
-        }
-        return changed;
-    }
-}
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