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/*========================== begin_copyright_notice ============================
Copyright (C) 2018-2021 Intel Corporation
SPDX-License-Identifier: MIT
============================= end_copyright_notice ===========================*/
#include "Compiler/Optimizer/OpenCLPasses/ErrorCheckPass.h"
#include "Compiler/Optimizer/OpenCLPasses/KernelArgs.hpp"
#include "Compiler/IGCPassSupport.h"
#include "common/LLVMWarningsPush.hpp"
#include <llvm/Pass.h>
#include <llvm/IR/InstVisitor.h>
#include <llvm/IR/Function.h>
#include <llvm/IR/Instructions.h>
#include "common/LLVMWarningsPop.hpp"
using namespace llvm;
using namespace IGC;
char ErrorCheck::ID = 0;
// Register pass to igc-opt
#define PASS_FLAG "igc-error-check"
#define PASS_DESCRIPTION "Check for input errors"
#define PASS_CFG_ONLY false
#define PASS_ANALYSIS false
IGC_INITIALIZE_PASS_BEGIN(ErrorCheck, PASS_FLAG, PASS_DESCRIPTION, PASS_CFG_ONLY, PASS_ANALYSIS)
IGC_INITIALIZE_PASS_DEPENDENCY(CodeGenContextWrapper)
IGC_INITIALIZE_PASS_DEPENDENCY(MetaDataUtilsWrapper)
IGC_INITIALIZE_PASS_END(ErrorCheck, PASS_FLAG, PASS_DESCRIPTION, PASS_CFG_ONLY, PASS_ANALYSIS)
ErrorCheck::ErrorCheck(void) : FunctionPass(ID)
{
initializeErrorCheckPass(*PassRegistry::getPassRegistry());
}
bool ErrorCheck::runOnFunction(Function& F)
{
// add more checks as needed later
visit(F);
if (isEntryFunc(getAnalysis<MetaDataUtilsWrapper>().getMetaDataUtils(), &F))
{
checkArgsSize(F);
}
return m_hasError;
}
void ErrorCheck::checkArgsSize(Function& F)
{
auto Ctx = getAnalysis<CodeGenContextWrapper>().getCodeGenContext();
auto MdUtils = getAnalysis<MetaDataUtilsWrapper>().getMetaDataUtils();
auto ModMD = getAnalysis<MetaDataUtilsWrapper>().getModuleMetaData();
auto DL = F.getParent()->getDataLayout();
KernelArgs KernelArgs(F, &DL, MdUtils, ModMD, Ctx->platform.getGRFSize());
auto MaxParamSize = Ctx->platform.getMaxOCLParameteSize();
uint64_t TotalSize = 0;
if (KernelArgs.empty())
{
return;
}
for (auto& KernelArg : KernelArgs)
{
auto Arg = KernelArg.getArg();
Type* ArgType = Arg->getType();
ArgType = Arg->hasByValAttr() ? ArgType->getPointerElementType() : ArgType;
if (!KernelArg.isImplicitArg())
{
TotalSize += DL.getTypeAllocSize(ArgType);
}
}
if (TotalSize > MaxParamSize)
{
std::string ErrorMsg = "Total size of kernel arguments exceeds limit! Total arguments size: "
+ std::to_string(TotalSize) + ", limit: " + std::to_string(MaxParamSize);
Ctx->EmitError(ErrorMsg.c_str(), &F);
m_hasError = true;
}
}
static bool isFP64Operation(llvm::Instruction *I) {
if (I->getType()->isDoubleTy())
return true;
for (int i = 0, numOpnd = (int)I->getNumOperands(); i < numOpnd; ++i)
if (I->getOperand(i)->getType()->isDoubleTy())
return true;
return false;
}
void ErrorCheck::visitInstruction(llvm::Instruction& I)
{
auto ctx = getAnalysis<CodeGenContextWrapper>().getCodeGenContext();
bool poisonFP64KernelsEnabled = false;
if (ctx->type == ShaderType::OPENCL_SHADER)
{
OpenCLProgramContext *OCLContext = static_cast<OpenCLProgramContext*>(ctx);
poisonFP64KernelsEnabled = OCLContext->m_InternalOptions.EnableUnsupportedFP64Poisoning;
}
if (!ctx->m_DriverInfo.NeedFP64(ctx->platform.getPlatformInfo().eProductFamily) && ctx->platform.hasNoFP64Inst()
&& IGC_IS_FLAG_DISABLED(ForceDPEmulation))
{
// check that input does not use double
// For testing purpose, this check is skipped if ForceDPEmulation is on.
const bool usesDouble = isFP64Operation(&I);
if (!usesDouble)
return;
if (!poisonFP64KernelsEnabled) {
ctx->EmitError("Double type is not supported on this platform.", &I);
m_hasError = true;
return;
}
Function *F = I.getParent()->getParent();
F->addFnAttr("uses-fp64-math");
}
}
void ErrorCheck::visitCallInst(CallInst& CI)
{
if (auto* GII = dyn_cast<GenIntrinsicInst>(&CI))
{
switch (GII->getIntrinsicID()) {
case GenISAIntrinsic::GenISA_dp4a_ss:
case GenISAIntrinsic::GenISA_dp4a_su:
case GenISAIntrinsic::GenISA_dp4a_us:
case GenISAIntrinsic::GenISA_dp4a_uu:
{
CodeGenContext* Ctx =
getAnalysis<CodeGenContextWrapper>().getCodeGenContext();
if (!Ctx->platform.hasHWDp4AddSupport())
{
std::string Msg = "Unsupported call to ";
Msg += CI.getCalledFunction() ?
CI.getCalledFunction()->getName() : "indirect function";
Ctx->EmitError(Msg.c_str(), &CI);
m_hasError = true;
}
break;
}
default:
// Intrinsic supported.
break;
}
}
}
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