Add R600 backend
A new backend supporting AMD GPUs: Radeon HD2XXX - HD7XXX
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169915 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/R600/AMDILPeepholeOptimizer.cpp b/lib/Target/R600/AMDILPeepholeOptimizer.cpp
new file mode 100644
index 0000000..4a748b8
--- /dev/null
+++ b/lib/Target/R600/AMDILPeepholeOptimizer.cpp
@@ -0,0 +1,1215 @@
+//===-- AMDILPeepholeOptimizer.cpp - AMDGPU Peephole optimizations ---------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+/// \file
+//==-----------------------------------------------------------------------===//
+
+#define DEBUG_TYPE "PeepholeOpt"
+#ifdef DEBUG
+#define DEBUGME (DebugFlag && isCurrentDebugType(DEBUG_TYPE))
+#else
+#define DEBUGME 0
+#endif
+
+#include "AMDILDevices.h"
+#include "AMDGPUInstrInfo.h"
+#include "llvm/ADT/Statistic.h"
+#include "llvm/ADT/StringExtras.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/ADT/Twine.h"
+#include "llvm/Constants.h"
+#include "llvm/CodeGen/MachineFunction.h"
+#include "llvm/CodeGen/MachineFunctionAnalysis.h"
+#include "llvm/Function.h"
+#include "llvm/Instructions.h"
+#include "llvm/Module.h"
+#include "llvm/Support/Debug.h"
+#include "llvm/Support/MathExtras.h"
+
+#include <sstream>
+
+#if 0
+STATISTIC(PointerAssignments, "Number of dynamic pointer "
+ "assigments discovered");
+STATISTIC(PointerSubtract, "Number of pointer subtractions discovered");
+#endif
+
+using namespace llvm;
+// The Peephole optimization pass is used to do simple last minute optimizations
+// that are required for correct code or to remove redundant functions
+namespace {
+
+class OpaqueType;
+
+class LLVM_LIBRARY_VISIBILITY AMDGPUPeepholeOpt : public FunctionPass {
+public:
+ TargetMachine &TM;
+ static char ID;
+ AMDGPUPeepholeOpt(TargetMachine &tm);
+ ~AMDGPUPeepholeOpt();
+ const char *getPassName() const;
+ bool runOnFunction(Function &F);
+ bool doInitialization(Module &M);
+ bool doFinalization(Module &M);
+ void getAnalysisUsage(AnalysisUsage &AU) const;
+protected:
+private:
+ // Function to initiate all of the instruction level optimizations.
+ bool instLevelOptimizations(BasicBlock::iterator *inst);
+ // Quick check to see if we need to dump all of the pointers into the
+ // arena. If this is correct, then we set all pointers to exist in arena. This
+ // is a workaround for aliasing of pointers in a struct/union.
+ bool dumpAllIntoArena(Function &F);
+ // Because I don't want to invalidate any pointers while in the
+ // safeNestedForEachFunction. I push atomic conversions to a vector and handle
+ // it later. This function does the conversions if required.
+ void doAtomicConversionIfNeeded(Function &F);
+ // Because __amdil_is_constant cannot be properly evaluated if
+ // optimizations are disabled, the call's are placed in a vector
+ // and evaluated after the __amdil_image* functions are evaluated
+ // which should allow the __amdil_is_constant function to be
+ // evaluated correctly.
+ void doIsConstCallConversionIfNeeded();
+ bool mChanged;
+ bool mDebug;
+ bool mConvertAtomics;
+ CodeGenOpt::Level optLevel;
+ // Run a series of tests to see if we can optimize a CALL instruction.
+ bool optimizeCallInst(BasicBlock::iterator *bbb);
+ // A peephole optimization to optimize bit extract sequences.
+ bool optimizeBitExtract(Instruction *inst);
+ // A peephole optimization to optimize bit insert sequences.
+ bool optimizeBitInsert(Instruction *inst);
+ bool setupBitInsert(Instruction *base,
+ Instruction *&src,
+ Constant *&mask,
+ Constant *&shift);
+ // Expand the bit field insert instruction on versions of OpenCL that
+ // don't support it.
+ bool expandBFI(CallInst *CI);
+ // Expand the bit field mask instruction on version of OpenCL that
+ // don't support it.
+ bool expandBFM(CallInst *CI);
+ // On 7XX and 8XX operations, we do not have 24 bit signed operations. So in
+ // this case we need to expand them. These functions check for 24bit functions
+ // and then expand.
+ bool isSigned24BitOps(CallInst *CI);
+ void expandSigned24BitOps(CallInst *CI);
+ // One optimization that can occur is that if the required workgroup size is
+ // specified then the result of get_local_size is known at compile time and
+ // can be returned accordingly.
+ bool isRWGLocalOpt(CallInst *CI);
+ // On northern island cards, the division is slightly less accurate than on
+ // previous generations, so we need to utilize a more accurate division. So we
+ // can translate the accurate divide to a normal divide on all other cards.
+ bool convertAccurateDivide(CallInst *CI);
+ void expandAccurateDivide(CallInst *CI);
+ // If the alignment is set incorrectly, it can produce really inefficient
+ // code. This checks for this scenario and fixes it if possible.
+ bool correctMisalignedMemOp(Instruction *inst);
+
+ // If we are in no opt mode, then we need to make sure that
+ // local samplers are properly propagated as constant propagation
+ // doesn't occur and we need to know the value of kernel defined
+ // samplers at compile time.
+ bool propagateSamplerInst(CallInst *CI);
+
+ // Helper functions
+
+ // Group of functions that recursively calculate the size of a structure based
+ // on it's sub-types.
+ size_t getTypeSize(Type * const T, bool dereferencePtr = false);
+ size_t getTypeSize(StructType * const ST, bool dereferencePtr = false);
+ size_t getTypeSize(IntegerType * const IT, bool dereferencePtr = false);
+ size_t getTypeSize(FunctionType * const FT,bool dereferencePtr = false);
+ size_t getTypeSize(ArrayType * const AT, bool dereferencePtr = false);
+ size_t getTypeSize(VectorType * const VT, bool dereferencePtr = false);
+ size_t getTypeSize(PointerType * const PT, bool dereferencePtr = false);
+ size_t getTypeSize(OpaqueType * const OT, bool dereferencePtr = false);
+
+ LLVMContext *mCTX;
+ Function *mF;
+ const AMDGPUSubtarget *mSTM;
+ SmallVector< std::pair<CallInst *, Function *>, 16> atomicFuncs;
+ SmallVector<CallInst *, 16> isConstVec;
+}; // class AMDGPUPeepholeOpt
+ char AMDGPUPeepholeOpt::ID = 0;
+
+// A template function that has two levels of looping before calling the
+// function with a pointer to the current iterator.
+template<class InputIterator, class SecondIterator, class Function>
+Function safeNestedForEach(InputIterator First, InputIterator Last,
+ SecondIterator S, Function F) {
+ for ( ; First != Last; ++First) {
+ SecondIterator sf, sl;
+ for (sf = First->begin(), sl = First->end();
+ sf != sl; ) {
+ if (!F(&sf)) {
+ ++sf;
+ }
+ }
+ }
+ return F;
+}
+
+} // anonymous namespace
+
+namespace llvm {
+ FunctionPass *
+ createAMDGPUPeepholeOpt(TargetMachine &tm) {
+ return new AMDGPUPeepholeOpt(tm);
+ }
+} // llvm namespace
+
+AMDGPUPeepholeOpt::AMDGPUPeepholeOpt(TargetMachine &tm)
+ : FunctionPass(ID), TM(tm) {
+ mDebug = DEBUGME;
+ optLevel = TM.getOptLevel();
+
+}
+
+AMDGPUPeepholeOpt::~AMDGPUPeepholeOpt() {
+}
+
+const char *
+AMDGPUPeepholeOpt::getPassName() const {
+ return "AMDGPU PeepHole Optimization Pass";
+}
+
+bool
+containsPointerType(Type *Ty) {
+ if (!Ty) {
+ return false;
+ }
+ switch(Ty->getTypeID()) {
+ default:
+ return false;
+ case Type::StructTyID: {
+ const StructType *ST = dyn_cast<StructType>(Ty);
+ for (StructType::element_iterator stb = ST->element_begin(),
+ ste = ST->element_end(); stb != ste; ++stb) {
+ if (!containsPointerType(*stb)) {
+ continue;
+ }
+ return true;
+ }
+ break;
+ }
+ case Type::VectorTyID:
+ case Type::ArrayTyID:
+ return containsPointerType(dyn_cast<SequentialType>(Ty)->getElementType());
+ case Type::PointerTyID:
+ return true;
+ };
+ return false;
+}
+
+bool
+AMDGPUPeepholeOpt::dumpAllIntoArena(Function &F) {
+ bool dumpAll = false;
+ for (Function::const_arg_iterator cab = F.arg_begin(),
+ cae = F.arg_end(); cab != cae; ++cab) {
+ const Argument *arg = cab;
+ const PointerType *PT = dyn_cast<PointerType>(arg->getType());
+ if (!PT) {
+ continue;
+ }
+ Type *DereferencedType = PT->getElementType();
+ if (!dyn_cast<StructType>(DereferencedType)
+ ) {
+ continue;
+ }
+ if (!containsPointerType(DereferencedType)) {
+ continue;
+ }
+ // FIXME: Because a pointer inside of a struct/union may be aliased to
+ // another pointer we need to take the conservative approach and place all
+ // pointers into the arena until more advanced detection is implemented.
+ dumpAll = true;
+ }
+ return dumpAll;
+}
+void
+AMDGPUPeepholeOpt::doIsConstCallConversionIfNeeded() {
+ if (isConstVec.empty()) {
+ return;
+ }
+ for (unsigned x = 0, y = isConstVec.size(); x < y; ++x) {
+ CallInst *CI = isConstVec[x];
+ Constant *CV = dyn_cast<Constant>(CI->getOperand(0));
+ Type *aType = Type::getInt32Ty(*mCTX);
+ Value *Val = (CV != NULL) ? ConstantInt::get(aType, 1)
+ : ConstantInt::get(aType, 0);
+ CI->replaceAllUsesWith(Val);
+ CI->eraseFromParent();
+ }
+ isConstVec.clear();
+}
+void
+AMDGPUPeepholeOpt::doAtomicConversionIfNeeded(Function &F) {
+ // Don't do anything if we don't have any atomic operations.
+ if (atomicFuncs.empty()) {
+ return;
+ }
+ // Change the function name for the atomic if it is required
+ uint32_t size = atomicFuncs.size();
+ for (uint32_t x = 0; x < size; ++x) {
+ atomicFuncs[x].first->setOperand(
+ atomicFuncs[x].first->getNumOperands()-1,
+ atomicFuncs[x].second);
+
+ }
+ mChanged = true;
+ if (mConvertAtomics) {
+ return;
+ }
+}
+
+bool
+AMDGPUPeepholeOpt::runOnFunction(Function &MF) {
+ mChanged = false;
+ mF = &MF;
+ mSTM = &TM.getSubtarget<AMDGPUSubtarget>();
+ if (mDebug) {
+ MF.dump();
+ }
+ mCTX = &MF.getType()->getContext();
+ mConvertAtomics = true;
+ safeNestedForEach(MF.begin(), MF.end(), MF.begin()->begin(),
+ std::bind1st(std::mem_fun(&AMDGPUPeepholeOpt::instLevelOptimizations),
+ this));
+
+ doAtomicConversionIfNeeded(MF);
+ doIsConstCallConversionIfNeeded();
+
+ if (mDebug) {
+ MF.dump();
+ }
+ return mChanged;
+}
+
+bool
+AMDGPUPeepholeOpt::optimizeCallInst(BasicBlock::iterator *bbb) {
+ Instruction *inst = (*bbb);
+ CallInst *CI = dyn_cast<CallInst>(inst);
+ if (!CI) {
+ return false;
+ }
+ if (isSigned24BitOps(CI)) {
+ expandSigned24BitOps(CI);
+ ++(*bbb);
+ CI->eraseFromParent();
+ return true;
+ }
+ if (propagateSamplerInst(CI)) {
+ return false;
+ }
+ if (expandBFI(CI) || expandBFM(CI)) {
+ ++(*bbb);
+ CI->eraseFromParent();
+ return true;
+ }
+ if (convertAccurateDivide(CI)) {
+ expandAccurateDivide(CI);
+ ++(*bbb);
+ CI->eraseFromParent();
+ return true;
+ }
+
+ StringRef calleeName = CI->getOperand(CI->getNumOperands()-1)->getName();
+ if (calleeName.startswith("__amdil_is_constant")) {
+ // If we do not have optimizations, then this
+ // cannot be properly evaluated, so we add the
+ // call instruction to a vector and process
+ // them at the end of processing after the
+ // samplers have been correctly handled.
+ if (optLevel == CodeGenOpt::None) {
+ isConstVec.push_back(CI);
+ return false;
+ } else {
+ Constant *CV = dyn_cast<Constant>(CI->getOperand(0));
+ Type *aType = Type::getInt32Ty(*mCTX);
+ Value *Val = (CV != NULL) ? ConstantInt::get(aType, 1)
+ : ConstantInt::get(aType, 0);
+ CI->replaceAllUsesWith(Val);
+ ++(*bbb);
+ CI->eraseFromParent();
+ return true;
+ }
+ }
+
+ if (calleeName.equals("__amdil_is_asic_id_i32")) {
+ ConstantInt *CV = dyn_cast<ConstantInt>(CI->getOperand(0));
+ Type *aType = Type::getInt32Ty(*mCTX);
+ Value *Val = CV;
+ if (Val) {
+ Val = ConstantInt::get(aType,
+ mSTM->device()->getDeviceFlag() & CV->getZExtValue());
+ } else {
+ Val = ConstantInt::get(aType, 0);
+ }
+ CI->replaceAllUsesWith(Val);
+ ++(*bbb);
+ CI->eraseFromParent();
+ return true;
+ }
+ Function *F = dyn_cast<Function>(CI->getOperand(CI->getNumOperands()-1));
+ if (!F) {
+ return false;
+ }
+ if (F->getName().startswith("__atom") && !CI->getNumUses()
+ && F->getName().find("_xchg") == StringRef::npos) {
+ std::string buffer(F->getName().str() + "_noret");
+ F = dyn_cast<Function>(
+ F->getParent()->getOrInsertFunction(buffer, F->getFunctionType()));
+ atomicFuncs.push_back(std::make_pair <CallInst*, Function*>(CI, F));
+ }
+
+ if (!mSTM->device()->isSupported(AMDGPUDeviceInfo::ArenaSegment)
+ && !mSTM->device()->isSupported(AMDGPUDeviceInfo::MultiUAV)) {
+ return false;
+ }
+ if (!mConvertAtomics) {
+ return false;
+ }
+ StringRef name = F->getName();
+ if (name.startswith("__atom") && name.find("_g") != StringRef::npos) {
+ mConvertAtomics = false;
+ }
+ return false;
+}
+
+bool
+AMDGPUPeepholeOpt::setupBitInsert(Instruction *base,
+ Instruction *&src,
+ Constant *&mask,
+ Constant *&shift) {
+ if (!base) {
+ if (mDebug) {
+ dbgs() << "Null pointer passed into function.\n";
+ }
+ return false;
+ }
+ bool andOp = false;
+ if (base->getOpcode() == Instruction::Shl) {
+ shift = dyn_cast<Constant>(base->getOperand(1));
+ } else if (base->getOpcode() == Instruction::And) {
+ mask = dyn_cast<Constant>(base->getOperand(1));
+ andOp = true;
+ } else {
+ if (mDebug) {
+ dbgs() << "Failed setup with no Shl or And instruction on base opcode!\n";
+ }
+ // If the base is neither a Shl or a And, we don't fit any of the patterns above.
+ return false;
+ }
+ src = dyn_cast<Instruction>(base->getOperand(0));
+ if (!src) {
+ if (mDebug) {
+ dbgs() << "Failed setup since the base operand is not an instruction!\n";
+ }
+ return false;
+ }
+ // If we find an 'and' operation, then we don't need to
+ // find the next operation as we already know the
+ // bits that are valid at this point.
+ if (andOp) {
+ return true;
+ }
+ if (src->getOpcode() == Instruction::Shl && !shift) {
+ shift = dyn_cast<Constant>(src->getOperand(1));
+ src = dyn_cast<Instruction>(src->getOperand(0));
+ } else if (src->getOpcode() == Instruction::And && !mask) {
+ mask = dyn_cast<Constant>(src->getOperand(1));
+ }
+ if (!mask && !shift) {
+ if (mDebug) {
+ dbgs() << "Failed setup since both mask and shift are NULL!\n";
+ }
+ // Did not find a constant mask or a shift.
+ return false;
+ }
+ return true;
+}
+bool
+AMDGPUPeepholeOpt::optimizeBitInsert(Instruction *inst) {
+ if (!inst) {
+ return false;
+ }
+ if (!inst->isBinaryOp()) {
+ return false;
+ }
+ if (inst->getOpcode() != Instruction::Or) {
+ return false;
+ }
+ if (optLevel == CodeGenOpt::None) {
+ return false;
+ }
+ // We want to do an optimization on a sequence of ops that in the end equals a
+ // single ISA instruction.
+ // The base pattern for this optimization is - ((A & B) << C) | ((D & E) << F)
+ // Some simplified versions of this pattern are as follows:
+ // (A & B) | (D & E) when B & E == 0 && C == 0 && F == 0
+ // ((A & B) << C) | (D & E) when B ^ E == 0 && (1 << C) >= E
+ // (A & B) | ((D & E) << F) when B ^ E == 0 && (1 << F) >= B
+ // (A & B) | (D << F) when (1 << F) >= B
+ // (A << C) | (D & E) when (1 << C) >= E
+ if (mSTM->device()->getGeneration() == AMDGPUDeviceInfo::HD4XXX) {
+ // The HD4XXX hardware doesn't support the ubit_insert instruction.
+ return false;
+ }
+ Type *aType = inst->getType();
+ bool isVector = aType->isVectorTy();
+ int numEle = 1;
+ // This optimization only works on 32bit integers.
+ if (aType->getScalarType()
+ != Type::getInt32Ty(inst->getContext())) {
+ return false;
+ }
+ if (isVector) {
+ const VectorType *VT = dyn_cast<VectorType>(aType);
+ numEle = VT->getNumElements();
+ // We currently cannot support more than 4 elements in a intrinsic and we
+ // cannot support Vec3 types.
+ if (numEle > 4 || numEle == 3) {
+ return false;
+ }
+ }
+ // TODO: Handle vectors.
+ if (isVector) {
+ if (mDebug) {
+ dbgs() << "!!! Vectors are not supported yet!\n";
+ }
+ return false;
+ }
+ Instruction *LHSSrc = NULL, *RHSSrc = NULL;
+ Constant *LHSMask = NULL, *RHSMask = NULL;
+ Constant *LHSShift = NULL, *RHSShift = NULL;
+ Instruction *LHS = dyn_cast<Instruction>(inst->getOperand(0));
+ Instruction *RHS = dyn_cast<Instruction>(inst->getOperand(1));
+ if (!setupBitInsert(LHS, LHSSrc, LHSMask, LHSShift)) {
+ if (mDebug) {
+ dbgs() << "Found an OR Operation that failed setup!\n";
+ inst->dump();
+ if (LHS) { LHS->dump(); }
+ if (LHSSrc) { LHSSrc->dump(); }
+ if (LHSMask) { LHSMask->dump(); }
+ if (LHSShift) { LHSShift->dump(); }
+ }
+ // There was an issue with the setup for BitInsert.
+ return false;
+ }
+ if (!setupBitInsert(RHS, RHSSrc, RHSMask, RHSShift)) {
+ if (mDebug) {
+ dbgs() << "Found an OR Operation that failed setup!\n";
+ inst->dump();
+ if (RHS) { RHS->dump(); }
+ if (RHSSrc) { RHSSrc->dump(); }
+ if (RHSMask) { RHSMask->dump(); }
+ if (RHSShift) { RHSShift->dump(); }
+ }
+ // There was an issue with the setup for BitInsert.
+ return false;
+ }
+ if (mDebug) {
+ dbgs() << "Found an OR operation that can possible be optimized to ubit insert!\n";
+ dbgs() << "Op: "; inst->dump();
+ dbgs() << "LHS: "; if (LHS) { LHS->dump(); } else { dbgs() << "(None)\n"; }
+ dbgs() << "LHS Src: "; if (LHSSrc) { LHSSrc->dump(); } else { dbgs() << "(None)\n"; }
+ dbgs() << "LHS Mask: "; if (LHSMask) { LHSMask->dump(); } else { dbgs() << "(None)\n"; }
+ dbgs() << "LHS Shift: "; if (LHSShift) { LHSShift->dump(); } else { dbgs() << "(None)\n"; }
+ dbgs() << "RHS: "; if (RHS) { RHS->dump(); } else { dbgs() << "(None)\n"; }
+ dbgs() << "RHS Src: "; if (RHSSrc) { RHSSrc->dump(); } else { dbgs() << "(None)\n"; }
+ dbgs() << "RHS Mask: "; if (RHSMask) { RHSMask->dump(); } else { dbgs() << "(None)\n"; }
+ dbgs() << "RHS Shift: "; if (RHSShift) { RHSShift->dump(); } else { dbgs() << "(None)\n"; }
+ }
+ Constant *offset = NULL;
+ Constant *width = NULL;
+ uint32_t lhsMaskVal = 0, rhsMaskVal = 0;
+ uint32_t lhsShiftVal = 0, rhsShiftVal = 0;
+ uint32_t lhsMaskWidth = 0, rhsMaskWidth = 0;
+ uint32_t lhsMaskOffset = 0, rhsMaskOffset = 0;
+ lhsMaskVal = (LHSMask
+ ? dyn_cast<ConstantInt>(LHSMask)->getZExtValue() : 0);
+ rhsMaskVal = (RHSMask
+ ? dyn_cast<ConstantInt>(RHSMask)->getZExtValue() : 0);
+ lhsShiftVal = (LHSShift
+ ? dyn_cast<ConstantInt>(LHSShift)->getZExtValue() : 0);
+ rhsShiftVal = (RHSShift
+ ? dyn_cast<ConstantInt>(RHSShift)->getZExtValue() : 0);
+ lhsMaskWidth = lhsMaskVal ? CountPopulation_32(lhsMaskVal) : 32 - lhsShiftVal;
+ rhsMaskWidth = rhsMaskVal ? CountPopulation_32(rhsMaskVal) : 32 - rhsShiftVal;
+ lhsMaskOffset = lhsMaskVal ? CountTrailingZeros_32(lhsMaskVal) : lhsShiftVal;
+ rhsMaskOffset = rhsMaskVal ? CountTrailingZeros_32(rhsMaskVal) : rhsShiftVal;
+ // TODO: Handle the case of A & B | D & ~B(i.e. inverted masks).
+ if ((lhsMaskVal || rhsMaskVal) && !(lhsMaskVal ^ rhsMaskVal)) {
+ return false;
+ }
+ if (lhsMaskOffset >= (rhsMaskWidth + rhsMaskOffset)) {
+ offset = ConstantInt::get(aType, lhsMaskOffset, false);
+ width = ConstantInt::get(aType, lhsMaskWidth, false);
+ RHSSrc = RHS;
+ if (!isMask_32(lhsMaskVal) && !isShiftedMask_32(lhsMaskVal)) {
+ return false;
+ }
+ if (!LHSShift) {
+ LHSSrc = BinaryOperator::Create(Instruction::LShr, LHSSrc, offset,
+ "MaskShr", LHS);
+ } else if (lhsShiftVal != lhsMaskOffset) {
+ LHSSrc = BinaryOperator::Create(Instruction::LShr, LHSSrc, offset,
+ "MaskShr", LHS);
+ }
+ if (mDebug) {
+ dbgs() << "Optimizing LHS!\n";
+ }
+ } else if (rhsMaskOffset >= (lhsMaskWidth + lhsMaskOffset)) {
+ offset = ConstantInt::get(aType, rhsMaskOffset, false);
+ width = ConstantInt::get(aType, rhsMaskWidth, false);
+ LHSSrc = RHSSrc;
+ RHSSrc = LHS;
+ if (!isMask_32(rhsMaskVal) && !isShiftedMask_32(rhsMaskVal)) {
+ return false;
+ }
+ if (!RHSShift) {
+ LHSSrc = BinaryOperator::Create(Instruction::LShr, LHSSrc, offset,
+ "MaskShr", RHS);
+ } else if (rhsShiftVal != rhsMaskOffset) {
+ LHSSrc = BinaryOperator::Create(Instruction::LShr, LHSSrc, offset,
+ "MaskShr", RHS);
+ }
+ if (mDebug) {
+ dbgs() << "Optimizing RHS!\n";
+ }
+ } else {
+ if (mDebug) {
+ dbgs() << "Failed constraint 3!\n";
+ }
+ return false;
+ }
+ if (mDebug) {
+ dbgs() << "Width: "; if (width) { width->dump(); } else { dbgs() << "(0)\n"; }
+ dbgs() << "Offset: "; if (offset) { offset->dump(); } else { dbgs() << "(0)\n"; }
+ dbgs() << "LHSSrc: "; if (LHSSrc) { LHSSrc->dump(); } else { dbgs() << "(0)\n"; }
+ dbgs() << "RHSSrc: "; if (RHSSrc) { RHSSrc->dump(); } else { dbgs() << "(0)\n"; }
+ }
+ if (!offset || !width) {
+ if (mDebug) {
+ dbgs() << "Either width or offset are NULL, failed detection!\n";
+ }
+ return false;
+ }
+ // Lets create the function signature.
+ std::vector<Type *> callTypes;
+ callTypes.push_back(aType);
+ callTypes.push_back(aType);
+ callTypes.push_back(aType);
+ callTypes.push_back(aType);
+ FunctionType *funcType = FunctionType::get(aType, callTypes, false);
+ std::string name = "__amdil_ubit_insert";
+ if (isVector) { name += "_v" + itostr(numEle) + "u32"; } else { name += "_u32"; }
+ Function *Func =
+ dyn_cast<Function>(inst->getParent()->getParent()->getParent()->
+ getOrInsertFunction(llvm::StringRef(name), funcType));
+ Value *Operands[4] = {
+ width,
+ offset,
+ LHSSrc,
+ RHSSrc
+ };
+ CallInst *CI = CallInst::Create(Func, Operands, "BitInsertOpt");
+ if (mDebug) {
+ dbgs() << "Old Inst: ";
+ inst->dump();
+ dbgs() << "New Inst: ";
+ CI->dump();
+ dbgs() << "\n\n";
+ }
+ CI->insertBefore(inst);
+ inst->replaceAllUsesWith(CI);
+ return true;
+}
+
+bool
+AMDGPUPeepholeOpt::optimizeBitExtract(Instruction *inst) {
+ if (!inst) {
+ return false;
+ }
+ if (!inst->isBinaryOp()) {
+ return false;
+ }
+ if (inst->getOpcode() != Instruction::And) {
+ return false;
+ }
+ if (optLevel == CodeGenOpt::None) {
+ return false;
+ }
+ // We want to do some simple optimizations on Shift right/And patterns. The
+ // basic optimization is to turn (A >> B) & C where A is a 32bit type, B is a
+ // value smaller than 32 and C is a mask. If C is a constant value, then the
+ // following transformation can occur. For signed integers, it turns into the
+ // function call dst = __amdil_ibit_extract(log2(C), B, A) For unsigned
+ // integers, it turns into the function call dst =
+ // __amdil_ubit_extract(log2(C), B, A) The function __amdil_[u|i]bit_extract
+ // can be found in Section 7.9 of the ATI IL spec of the stream SDK for
+ // Evergreen hardware.
+ if (mSTM->device()->getGeneration() == AMDGPUDeviceInfo::HD4XXX) {
+ // This does not work on HD4XXX hardware.
+ return false;
+ }
+ Type *aType = inst->getType();
+ bool isVector = aType->isVectorTy();
+
+ // XXX Support vector types
+ if (isVector) {
+ return false;
+ }
+ int numEle = 1;
+ // This only works on 32bit integers
+ if (aType->getScalarType()
+ != Type::getInt32Ty(inst->getContext())) {
+ return false;
+ }
+ if (isVector) {
+ const VectorType *VT = dyn_cast<VectorType>(aType);
+ numEle = VT->getNumElements();
+ // We currently cannot support more than 4 elements in a intrinsic and we
+ // cannot support Vec3 types.
+ if (numEle > 4 || numEle == 3) {
+ return false;
+ }
+ }
+ BinaryOperator *ShiftInst = dyn_cast<BinaryOperator>(inst->getOperand(0));
+ // If the first operand is not a shift instruction, then we can return as it
+ // doesn't match this pattern.
+ if (!ShiftInst || !ShiftInst->isShift()) {
+ return false;
+ }
+ // If we are a shift left, then we need don't match this pattern.
+ if (ShiftInst->getOpcode() == Instruction::Shl) {
+ return false;
+ }
+ bool isSigned = ShiftInst->isArithmeticShift();
+ Constant *AndMask = dyn_cast<Constant>(inst->getOperand(1));
+ Constant *ShrVal = dyn_cast<Constant>(ShiftInst->getOperand(1));
+ // Lets make sure that the shift value and the and mask are constant integers.
+ if (!AndMask || !ShrVal) {
+ return false;
+ }
+ Constant *newMaskConst;
+ Constant *shiftValConst;
+ if (isVector) {
+ // Handle the vector case
+ std::vector<Constant *> maskVals;
+ std::vector<Constant *> shiftVals;
+ ConstantVector *AndMaskVec = dyn_cast<ConstantVector>(AndMask);
+ ConstantVector *ShrValVec = dyn_cast<ConstantVector>(ShrVal);
+ Type *scalarType = AndMaskVec->getType()->getScalarType();
+ assert(AndMaskVec->getNumOperands() ==
+ ShrValVec->getNumOperands() && "cannot have a "
+ "combination where the number of elements to a "
+ "shift and an and are different!");
+ for (size_t x = 0, y = AndMaskVec->getNumOperands(); x < y; ++x) {
+ ConstantInt *AndCI = dyn_cast<ConstantInt>(AndMaskVec->getOperand(x));
+ ConstantInt *ShiftIC = dyn_cast<ConstantInt>(ShrValVec->getOperand(x));
+ if (!AndCI || !ShiftIC) {
+ return false;
+ }
+ uint32_t maskVal = (uint32_t)AndCI->getZExtValue();
+ if (!isMask_32(maskVal)) {
+ return false;
+ }
+ maskVal = (uint32_t)CountTrailingOnes_32(maskVal);
+ uint32_t shiftVal = (uint32_t)ShiftIC->getZExtValue();
+ // If the mask or shiftval is greater than the bitcount, then break out.
+ if (maskVal >= 32 || shiftVal >= 32) {
+ return false;
+ }
+ // If the mask val is greater than the the number of original bits left
+ // then this optimization is invalid.
+ if (maskVal > (32 - shiftVal)) {
+ return false;
+ }
+ maskVals.push_back(ConstantInt::get(scalarType, maskVal, isSigned));
+ shiftVals.push_back(ConstantInt::get(scalarType, shiftVal, isSigned));
+ }
+ newMaskConst = ConstantVector::get(maskVals);
+ shiftValConst = ConstantVector::get(shiftVals);
+ } else {
+ // Handle the scalar case
+ uint32_t maskVal = (uint32_t)dyn_cast<ConstantInt>(AndMask)->getZExtValue();
+ // This must be a mask value where all lower bits are set to 1 and then any
+ // bit higher is set to 0.
+ if (!isMask_32(maskVal)) {
+ return false;
+ }
+ maskVal = (uint32_t)CountTrailingOnes_32(maskVal);
+ // Count the number of bits set in the mask, this is the width of the
+ // resulting bit set that is extracted from the source value.
+ uint32_t shiftVal = (uint32_t)dyn_cast<ConstantInt>(ShrVal)->getZExtValue();
+ // If the mask or shift val is greater than the bitcount, then break out.
+ if (maskVal >= 32 || shiftVal >= 32) {
+ return false;
+ }
+ // If the mask val is greater than the the number of original bits left then
+ // this optimization is invalid.
+ if (maskVal > (32 - shiftVal)) {
+ return false;
+ }
+ newMaskConst = ConstantInt::get(aType, maskVal, isSigned);
+ shiftValConst = ConstantInt::get(aType, shiftVal, isSigned);
+ }
+ // Lets create the function signature.
+ std::vector<Type *> callTypes;
+ callTypes.push_back(aType);
+ callTypes.push_back(aType);
+ callTypes.push_back(aType);
+ FunctionType *funcType = FunctionType::get(aType, callTypes, false);
+ std::string name = "llvm.AMDGPU.bit.extract.u32";
+ if (isVector) {
+ name += ".v" + itostr(numEle) + "i32";
+ } else {
+ name += ".";
+ }
+ // Lets create the function.
+ Function *Func =
+ dyn_cast<Function>(inst->getParent()->getParent()->getParent()->
+ getOrInsertFunction(llvm::StringRef(name), funcType));
+ Value *Operands[3] = {
+ ShiftInst->getOperand(0),
+ shiftValConst,
+ newMaskConst
+ };
+ // Lets create the Call with the operands
+ CallInst *CI = CallInst::Create(Func, Operands, "ByteExtractOpt");
+ CI->setDoesNotAccessMemory();
+ CI->insertBefore(inst);
+ inst->replaceAllUsesWith(CI);
+ return true;
+}
+
+bool
+AMDGPUPeepholeOpt::expandBFI(CallInst *CI) {
+ if (!CI) {
+ return false;
+ }
+ Value *LHS = CI->getOperand(CI->getNumOperands() - 1);
+ if (!LHS->getName().startswith("__amdil_bfi")) {
+ return false;
+ }
+ Type* type = CI->getOperand(0)->getType();
+ Constant *negOneConst = NULL;
+ if (type->isVectorTy()) {
+ std::vector<Constant *> negOneVals;
+ negOneConst = ConstantInt::get(CI->getContext(),
+ APInt(32, StringRef("-1"), 10));
+ for (size_t x = 0,
+ y = dyn_cast<VectorType>(type)->getNumElements(); x < y; ++x) {
+ negOneVals.push_back(negOneConst);
+ }
+ negOneConst = ConstantVector::get(negOneVals);
+ } else {
+ negOneConst = ConstantInt::get(CI->getContext(),
+ APInt(32, StringRef("-1"), 10));
+ }
+ // __amdil_bfi => (A & B) | (~A & C)
+ BinaryOperator *lhs =
+ BinaryOperator::Create(Instruction::And, CI->getOperand(0),
+ CI->getOperand(1), "bfi_and", CI);
+ BinaryOperator *rhs =
+ BinaryOperator::Create(Instruction::Xor, CI->getOperand(0), negOneConst,
+ "bfi_not", CI);
+ rhs = BinaryOperator::Create(Instruction::And, rhs, CI->getOperand(2),
+ "bfi_and", CI);
+ lhs = BinaryOperator::Create(Instruction::Or, lhs, rhs, "bfi_or", CI);
+ CI->replaceAllUsesWith(lhs);
+ return true;
+}
+
+bool
+AMDGPUPeepholeOpt::expandBFM(CallInst *CI) {
+ if (!CI) {
+ return false;
+ }
+ Value *LHS = CI->getOperand(CI->getNumOperands() - 1);
+ if (!LHS->getName().startswith("__amdil_bfm")) {
+ return false;
+ }
+ // __amdil_bfm => ((1 << (src0 & 0x1F)) - 1) << (src1 & 0x1f)
+ Constant *newMaskConst = NULL;
+ Constant *newShiftConst = NULL;
+ Type* type = CI->getOperand(0)->getType();
+ if (type->isVectorTy()) {
+ std::vector<Constant*> newMaskVals, newShiftVals;
+ newMaskConst = ConstantInt::get(Type::getInt32Ty(*mCTX), 0x1F);
+ newShiftConst = ConstantInt::get(Type::getInt32Ty(*mCTX), 1);
+ for (size_t x = 0,
+ y = dyn_cast<VectorType>(type)->getNumElements(); x < y; ++x) {
+ newMaskVals.push_back(newMaskConst);
+ newShiftVals.push_back(newShiftConst);
+ }
+ newMaskConst = ConstantVector::get(newMaskVals);
+ newShiftConst = ConstantVector::get(newShiftVals);
+ } else {
+ newMaskConst = ConstantInt::get(Type::getInt32Ty(*mCTX), 0x1F);
+ newShiftConst = ConstantInt::get(Type::getInt32Ty(*mCTX), 1);
+ }
+ BinaryOperator *lhs =
+ BinaryOperator::Create(Instruction::And, CI->getOperand(0),
+ newMaskConst, "bfm_mask", CI);
+ lhs = BinaryOperator::Create(Instruction::Shl, newShiftConst,
+ lhs, "bfm_shl", CI);
+ lhs = BinaryOperator::Create(Instruction::Sub, lhs,
+ newShiftConst, "bfm_sub", CI);
+ BinaryOperator *rhs =
+ BinaryOperator::Create(Instruction::And, CI->getOperand(1),
+ newMaskConst, "bfm_mask", CI);
+ lhs = BinaryOperator::Create(Instruction::Shl, lhs, rhs, "bfm_shl", CI);
+ CI->replaceAllUsesWith(lhs);
+ return true;
+}
+
+bool
+AMDGPUPeepholeOpt::instLevelOptimizations(BasicBlock::iterator *bbb) {
+ Instruction *inst = (*bbb);
+ if (optimizeCallInst(bbb)) {
+ return true;
+ }
+ if (optimizeBitExtract(inst)) {
+ return false;
+ }
+ if (optimizeBitInsert(inst)) {
+ return false;
+ }
+ if (correctMisalignedMemOp(inst)) {
+ return false;
+ }
+ return false;
+}
+bool
+AMDGPUPeepholeOpt::correctMisalignedMemOp(Instruction *inst) {
+ LoadInst *linst = dyn_cast<LoadInst>(inst);
+ StoreInst *sinst = dyn_cast<StoreInst>(inst);
+ unsigned alignment;
+ Type* Ty = inst->getType();
+ if (linst) {
+ alignment = linst->getAlignment();
+ Ty = inst->getType();
+ } else if (sinst) {
+ alignment = sinst->getAlignment();
+ Ty = sinst->getValueOperand()->getType();
+ } else {
+ return false;
+ }
+ unsigned size = getTypeSize(Ty);
+ if (size == alignment || size < alignment) {
+ return false;
+ }
+ if (!Ty->isStructTy()) {
+ return false;
+ }
+ if (alignment < 4) {
+ if (linst) {
+ linst->setAlignment(0);
+ return true;
+ } else if (sinst) {
+ sinst->setAlignment(0);
+ return true;
+ }
+ }
+ return false;
+}
+bool
+AMDGPUPeepholeOpt::isSigned24BitOps(CallInst *CI) {
+ if (!CI) {
+ return false;
+ }
+ Value *LHS = CI->getOperand(CI->getNumOperands() - 1);
+ std::string namePrefix = LHS->getName().substr(0, 14);
+ if (namePrefix != "__amdil_imad24" && namePrefix != "__amdil_imul24"
+ && namePrefix != "__amdil__imul24_high") {
+ return false;
+ }
+ if (mSTM->device()->usesHardware(AMDGPUDeviceInfo::Signed24BitOps)) {
+ return false;
+ }
+ return true;
+}
+
+void
+AMDGPUPeepholeOpt::expandSigned24BitOps(CallInst *CI) {
+ assert(isSigned24BitOps(CI) && "Must be a "
+ "signed 24 bit operation to call this function!");
+ Value *LHS = CI->getOperand(CI->getNumOperands()-1);
+ // On 7XX and 8XX we do not have signed 24bit, so we need to
+ // expand it to the following:
+ // imul24 turns into 32bit imul
+ // imad24 turns into 32bit imad
+ // imul24_high turns into 32bit imulhigh
+ if (LHS->getName().substr(0, 14) == "__amdil_imad24") {
+ Type *aType = CI->getOperand(0)->getType();
+ bool isVector = aType->isVectorTy();
+ int numEle = isVector ? dyn_cast<VectorType>(aType)->getNumElements() : 1;
+ std::vector<Type*> callTypes;
+ callTypes.push_back(CI->getOperand(0)->getType());
+ callTypes.push_back(CI->getOperand(1)->getType());
+ callTypes.push_back(CI->getOperand(2)->getType());
+ FunctionType *funcType =
+ FunctionType::get(CI->getOperand(0)->getType(), callTypes, false);
+ std::string name = "__amdil_imad";
+ if (isVector) {
+ name += "_v" + itostr(numEle) + "i32";
+ } else {
+ name += "_i32";
+ }
+ Function *Func = dyn_cast<Function>(
+ CI->getParent()->getParent()->getParent()->
+ getOrInsertFunction(llvm::StringRef(name), funcType));
+ Value *Operands[3] = {
+ CI->getOperand(0),
+ CI->getOperand(1),
+ CI->getOperand(2)
+ };
+ CallInst *nCI = CallInst::Create(Func, Operands, "imad24");
+ nCI->insertBefore(CI);
+ CI->replaceAllUsesWith(nCI);
+ } else if (LHS->getName().substr(0, 14) == "__amdil_imul24") {
+ BinaryOperator *mulOp =
+ BinaryOperator::Create(Instruction::Mul, CI->getOperand(0),
+ CI->getOperand(1), "imul24", CI);
+ CI->replaceAllUsesWith(mulOp);
+ } else if (LHS->getName().substr(0, 19) == "__amdil_imul24_high") {
+ Type *aType = CI->getOperand(0)->getType();
+
+ bool isVector = aType->isVectorTy();
+ int numEle = isVector ? dyn_cast<VectorType>(aType)->getNumElements() : 1;
+ std::vector<Type*> callTypes;
+ callTypes.push_back(CI->getOperand(0)->getType());
+ callTypes.push_back(CI->getOperand(1)->getType());
+ FunctionType *funcType =
+ FunctionType::get(CI->getOperand(0)->getType(), callTypes, false);
+ std::string name = "__amdil_imul_high";
+ if (isVector) {
+ name += "_v" + itostr(numEle) + "i32";
+ } else {
+ name += "_i32";
+ }
+ Function *Func = dyn_cast<Function>(
+ CI->getParent()->getParent()->getParent()->
+ getOrInsertFunction(llvm::StringRef(name), funcType));
+ Value *Operands[2] = {
+ CI->getOperand(0),
+ CI->getOperand(1)
+ };
+ CallInst *nCI = CallInst::Create(Func, Operands, "imul24_high");
+ nCI->insertBefore(CI);
+ CI->replaceAllUsesWith(nCI);
+ }
+}
+
+bool
+AMDGPUPeepholeOpt::isRWGLocalOpt(CallInst *CI) {
+ return (CI != NULL
+ && CI->getOperand(CI->getNumOperands() - 1)->getName()
+ == "__amdil_get_local_size_int");
+}
+
+bool
+AMDGPUPeepholeOpt::convertAccurateDivide(CallInst *CI) {
+ if (!CI) {
+ return false;
+ }
+ if (mSTM->device()->getGeneration() == AMDGPUDeviceInfo::HD6XXX
+ && (mSTM->getDeviceName() == "cayman")) {
+ return false;
+ }
+ return CI->getOperand(CI->getNumOperands() - 1)->getName().substr(0, 20)
+ == "__amdil_improved_div";
+}
+
+void
+AMDGPUPeepholeOpt::expandAccurateDivide(CallInst *CI) {
+ assert(convertAccurateDivide(CI)
+ && "expanding accurate divide can only happen if it is expandable!");
+ BinaryOperator *divOp =
+ BinaryOperator::Create(Instruction::FDiv, CI->getOperand(0),
+ CI->getOperand(1), "fdiv32", CI);
+ CI->replaceAllUsesWith(divOp);
+}
+
+bool
+AMDGPUPeepholeOpt::propagateSamplerInst(CallInst *CI) {
+ if (optLevel != CodeGenOpt::None) {
+ return false;
+ }
+
+ if (!CI) {
+ return false;
+ }
+
+ unsigned funcNameIdx = 0;
+ funcNameIdx = CI->getNumOperands() - 1;
+ StringRef calleeName = CI->getOperand(funcNameIdx)->getName();
+ if (calleeName != "__amdil_image2d_read_norm"
+ && calleeName != "__amdil_image2d_read_unnorm"
+ && calleeName != "__amdil_image3d_read_norm"
+ && calleeName != "__amdil_image3d_read_unnorm") {
+ return false;
+ }
+
+ unsigned samplerIdx = 2;
+ samplerIdx = 1;
+ Value *sampler = CI->getOperand(samplerIdx);
+ LoadInst *lInst = dyn_cast<LoadInst>(sampler);
+ if (!lInst) {
+ return false;
+ }
+
+ if (lInst->getPointerAddressSpace() != AMDGPUAS::PRIVATE_ADDRESS) {
+ return false;
+ }
+
+ GlobalVariable *gv = dyn_cast<GlobalVariable>(lInst->getPointerOperand());
+ // If we are loading from what is not a global value, then we
+ // fail and return.
+ if (!gv) {
+ return false;
+ }
+
+ // If we don't have an initializer or we have an initializer and
+ // the initializer is not a 32bit integer, we fail.
+ if (!gv->hasInitializer()
+ || !gv->getInitializer()->getType()->isIntegerTy(32)) {
+ return false;
+ }
+
+ // Now that we have the global variable initializer, lets replace
+ // all uses of the load instruction with the samplerVal and
+ // reparse the __amdil_is_constant() function.
+ Constant *samplerVal = gv->getInitializer();
+ lInst->replaceAllUsesWith(samplerVal);
+ return true;
+}
+
+bool
+AMDGPUPeepholeOpt::doInitialization(Module &M) {
+ return false;
+}
+
+bool
+AMDGPUPeepholeOpt::doFinalization(Module &M) {
+ return false;
+}
+
+void
+AMDGPUPeepholeOpt::getAnalysisUsage(AnalysisUsage &AU) const {
+ AU.addRequired<MachineFunctionAnalysis>();
+ FunctionPass::getAnalysisUsage(AU);
+ AU.setPreservesAll();
+}
+
+size_t AMDGPUPeepholeOpt::getTypeSize(Type * const T, bool dereferencePtr) {
+ size_t size = 0;
+ if (!T) {
+ return size;
+ }
+ switch (T->getTypeID()) {
+ case Type::X86_FP80TyID:
+ case Type::FP128TyID:
+ case Type::PPC_FP128TyID:
+ case Type::LabelTyID:
+ assert(0 && "These types are not supported by this backend");
+ default:
+ case Type::FloatTyID:
+ case Type::DoubleTyID:
+ size = T->getPrimitiveSizeInBits() >> 3;
+ break;
+ case Type::PointerTyID:
+ size = getTypeSize(dyn_cast<PointerType>(T), dereferencePtr);
+ break;
+ case Type::IntegerTyID:
+ size = getTypeSize(dyn_cast<IntegerType>(T), dereferencePtr);
+ break;
+ case Type::StructTyID:
+ size = getTypeSize(dyn_cast<StructType>(T), dereferencePtr);
+ break;
+ case Type::ArrayTyID:
+ size = getTypeSize(dyn_cast<ArrayType>(T), dereferencePtr);
+ break;
+ case Type::FunctionTyID:
+ size = getTypeSize(dyn_cast<FunctionType>(T), dereferencePtr);
+ break;
+ case Type::VectorTyID:
+ size = getTypeSize(dyn_cast<VectorType>(T), dereferencePtr);
+ break;
+ };
+ return size;
+}
+
+size_t AMDGPUPeepholeOpt::getTypeSize(StructType * const ST,
+ bool dereferencePtr) {
+ size_t size = 0;
+ if (!ST) {
+ return size;
+ }
+ Type *curType;
+ StructType::element_iterator eib;
+ StructType::element_iterator eie;
+ for (eib = ST->element_begin(), eie = ST->element_end(); eib != eie; ++eib) {
+ curType = *eib;
+ size += getTypeSize(curType, dereferencePtr);
+ }
+ return size;
+}
+
+size_t AMDGPUPeepholeOpt::getTypeSize(IntegerType * const IT,
+ bool dereferencePtr) {
+ return IT ? (IT->getBitWidth() >> 3) : 0;
+}
+
+size_t AMDGPUPeepholeOpt::getTypeSize(FunctionType * const FT,
+ bool dereferencePtr) {
+ assert(0 && "Should not be able to calculate the size of an function type");
+ return 0;
+}
+
+size_t AMDGPUPeepholeOpt::getTypeSize(ArrayType * const AT,
+ bool dereferencePtr) {
+ return (size_t)(AT ? (getTypeSize(AT->getElementType(),
+ dereferencePtr) * AT->getNumElements())
+ : 0);
+}
+
+size_t AMDGPUPeepholeOpt::getTypeSize(VectorType * const VT,
+ bool dereferencePtr) {
+ return VT ? (VT->getBitWidth() >> 3) : 0;
+}
+
+size_t AMDGPUPeepholeOpt::getTypeSize(PointerType * const PT,
+ bool dereferencePtr) {
+ if (!PT) {
+ return 0;
+ }
+ Type *CT = PT->getElementType();
+ if (CT->getTypeID() == Type::StructTyID &&
+ PT->getAddressSpace() == AMDGPUAS::PRIVATE_ADDRESS) {
+ return getTypeSize(dyn_cast<StructType>(CT));
+ } else if (dereferencePtr) {
+ size_t size = 0;
+ for (size_t x = 0, y = PT->getNumContainedTypes(); x < y; ++x) {
+ size += getTypeSize(PT->getContainedType(x), dereferencePtr);
+ }
+ return size;
+ } else {
+ return 4;
+ }
+}
+
+size_t AMDGPUPeepholeOpt::getTypeSize(OpaqueType * const OT,
+ bool dereferencePtr) {
+ //assert(0 && "Should not be able to calculate the size of an opaque type");
+ return 4;
+}