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/*========================== begin_copyright_notice ============================
Copyright (C) 2021 Intel Corporation
SPDX-License-Identifier: MIT
============================= end_copyright_notice ===========================*/
#include "Compiler/Optimizer/OpenCLPasses/ImageFuncs/ResolveSampledImageBuiltins.hpp"
#include "Compiler/IGCPassSupport.h"
#include "common/LLVMWarningsPush.hpp"
#include <llvm/IR/Function.h>
#include <llvm/IR/Instructions.h>
#include <llvmWrapper/IR/Instructions.h>
#include "common/LLVMWarningsPop.hpp"
#include "Probe/Assertion.h"
using namespace llvm;
using namespace IGC;
// Register pass to igc-opt
#define PASS_FLAG "igc-image-sampler-resolution"
#define PASS_DESCRIPTION "Resolves getter builtins operating on VMEImageIntel/SampledImage objects"
#define PASS_CFG_ONLY false
#define PASS_ANALYSIS false
IGC_INITIALIZE_PASS_BEGIN(ResolveSampledImageBuiltins, PASS_FLAG, PASS_DESCRIPTION, PASS_CFG_ONLY, PASS_ANALYSIS)
IGC_INITIALIZE_PASS_END(ResolveSampledImageBuiltins, PASS_FLAG, PASS_DESCRIPTION, PASS_CFG_ONLY, PASS_ANALYSIS)
char ResolveSampledImageBuiltins::ID = 0;
const llvm::StringRef ResolveSampledImageBuiltins::GET_IMAGE = "__builtin_IB_get_image";
const llvm::StringRef ResolveSampledImageBuiltins::GET_SAMPLER = "__builtin_IB_get_sampler";
ResolveSampledImageBuiltins::ResolveSampledImageBuiltins() : ModulePass(ID)
{
initializeResolveSampledImageBuiltinsPass(*PassRegistry::getPassRegistry());
}
bool ResolveSampledImageBuiltins::runOnModule(Module& M) {
m_changed = false;
visit(M);
for (auto builtin : m_builtinsToRemove)
{
if (!builtin->use_empty())
{
SmallVector<Instruction*, 4> usersToErase;
for (auto* user : builtin->users())
usersToErase.push_back(cast<Instruction>(user));
for (auto* user : usersToErase)
user->eraseFromParent();
}
builtin->eraseFromParent();
}
return m_changed;
}
void ResolveSampledImageBuiltins::visitCallInst(CallInst& CI)
{
if (!CI.getCalledFunction())
{
return;
}
Value* res = nullptr;
StringRef funcName = CI.getCalledFunction()->getName();
if (funcName.equals(ResolveSampledImageBuiltins::GET_IMAGE))
{
res = lowerGetImage(CI);
}
else if (funcName.equals(ResolveSampledImageBuiltins::GET_SAMPLER))
{
res = lowerGetSampler(CI);
}
else
{
return;
}
CI.replaceAllUsesWith(res);
CI.eraseFromParent();
m_changed = true;
}
// Transform the following sequence:
//
// %opaque = call spir_func %spirv.{VmeImageINTEL|SampledImage} addrspace(1)* @__builtin_spirv_{OpVmeImageINTEL|OpSampledImage}(
// %spirv.Image._void_1_0_0_0_0_0_0 addrspace(1)* %image, %spirv.Sampler* %sampler)
// %queried_image = call spir_func i64 @__builtin_IB_get_image(%spirv.{VmeImageINTEL|SampledImage} addrspace(1)* %opaque)
//
// Into:
//
// %queried_image = ptrtoint %spirv.Image._void_1_0_0_0_0_0_0 addrspace(1)* %image to i64
Value* ResolveSampledImageBuiltins::lowerGetImage(CallInst& CI)
{
IGC_ASSERT(IGCLLVM::getNumArgOperands(&CI) == 1);
CallInst* callReturningOpaque = dyn_cast<CallInst>(CI.getArgOperand(0)->stripPointerCasts());
IGC_ASSERT(callReturningOpaque);
m_builtinsToRemove.insert(callReturningOpaque);
Value* image = callReturningOpaque->getArgOperand(0);
IGC_ASSERT(isa<PointerType>(image->getType()));
return PtrToIntInst::Create(
Instruction::PtrToInt,
image,
Type::getInt64Ty(CI.getContext()),
"",
&CI);
}
// Transforms the following sequence:
//
// %sampler = call %spirv.Sampler* @__translate_sampler_initializer(i32 16)
// %opaque = call spir_func %spirv.{VmeImageINTEL|SampledImage} addrspace(1)* @__builtin_spirv_{OpVmeImageINTEL|OpSampledImage}(
// %spirv.Image._void_1_0_0_0_0_0_0 addrspace(1)* %image, %spirv.Sampler* %sampler)
// %queried_sampler = call spir_func i64 @__builtin_IB_get_sampler(%spirv.{VmeImageINTEL|SampledImage} addrspace(1)* %opaque)
//
// Into:
//
// %queried_sampler = zext i32 16 to i64
Value* ResolveSampledImageBuiltins::lowerGetSampler(CallInst& CI)
{
IGC_ASSERT(IGCLLVM::getNumArgOperands(&CI) == 1);
CallInst* callReturningOpaque = dyn_cast<CallInst>(CI.getArgOperand(0)->stripPointerCasts());
IGC_ASSERT(callReturningOpaque);
m_builtinsToRemove.insert(callReturningOpaque);
Value* samplerArg = callReturningOpaque->getArgOperand(1);
if (CallInst* samplerInitializer = dyn_cast<CallInst>(samplerArg))
{
IGC_ASSERT(samplerInitializer->getCalledFunction()->getName() == "__translate_sampler_initializer");
return ZExtInst::Create(
Instruction::ZExt,
samplerInitializer->getArgOperand(0),
Type::getInt64Ty(CI.getContext()),
"",
&CI);
}
else
{
IGC_ASSERT(samplerArg->getType()->isPointerTy());
return PtrToIntInst::Create(
Instruction::PtrToInt,
samplerArg,
Type::getInt64Ty(CI.getContext()),
"",
&CI);
}
}
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