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-rw-r--r--contrib/llvm/lib/CodeGen/SelectionDAG/SelectionDAGAddressAnalysis.cpp297
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diff --git a/contrib/llvm/lib/CodeGen/SelectionDAG/SelectionDAGAddressAnalysis.cpp b/contrib/llvm/lib/CodeGen/SelectionDAG/SelectionDAGAddressAnalysis.cpp
deleted file mode 100644
index 9592bc30a4e1..000000000000
--- a/contrib/llvm/lib/CodeGen/SelectionDAG/SelectionDAGAddressAnalysis.cpp
+++ /dev/null
@@ -1,297 +0,0 @@
-//==- llvm/CodeGen/SelectionDAGAddressAnalysis.cpp - DAG Address Analysis --==//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/CodeGen/SelectionDAGAddressAnalysis.h"
-#include "llvm/CodeGen/ISDOpcodes.h"
-#include "llvm/CodeGen/MachineFrameInfo.h"
-#include "llvm/CodeGen/MachineFunction.h"
-#include "llvm/CodeGen/SelectionDAG.h"
-#include "llvm/CodeGen/SelectionDAGNodes.h"
-#include "llvm/CodeGen/TargetLowering.h"
-#include "llvm/Support/Casting.h"
-#include <cstdint>
-
-using namespace llvm;
-
-bool BaseIndexOffset::equalBaseIndex(const BaseIndexOffset &Other,
- const SelectionDAG &DAG,
- int64_t &Off) const {
- // Conservatively fail if we a match failed..
- if (!Base.getNode() || !Other.Base.getNode())
- return false;
- if (!hasValidOffset() || !Other.hasValidOffset())
- return false;
- // Initial Offset difference.
- Off = *Other.Offset - *Offset;
-
- if ((Other.Index == Index) && (Other.IsIndexSignExt == IsIndexSignExt)) {
- // Trivial match.
- if (Other.Base == Base)
- return true;
-
- // Match GlobalAddresses
- if (auto *A = dyn_cast<GlobalAddressSDNode>(Base))
- if (auto *B = dyn_cast<GlobalAddressSDNode>(Other.Base))
- if (A->getGlobal() == B->getGlobal()) {
- Off += B->getOffset() - A->getOffset();
- return true;
- }
-
- // Match Constants
- if (auto *A = dyn_cast<ConstantPoolSDNode>(Base))
- if (auto *B = dyn_cast<ConstantPoolSDNode>(Other.Base)) {
- bool IsMatch =
- A->isMachineConstantPoolEntry() == B->isMachineConstantPoolEntry();
- if (IsMatch) {
- if (A->isMachineConstantPoolEntry())
- IsMatch = A->getMachineCPVal() == B->getMachineCPVal();
- else
- IsMatch = A->getConstVal() == B->getConstVal();
- }
- if (IsMatch) {
- Off += B->getOffset() - A->getOffset();
- return true;
- }
- }
-
- const MachineFrameInfo &MFI = DAG.getMachineFunction().getFrameInfo();
-
- // Match FrameIndexes.
- if (auto *A = dyn_cast<FrameIndexSDNode>(Base))
- if (auto *B = dyn_cast<FrameIndexSDNode>(Other.Base)) {
- // Equal FrameIndexes - offsets are directly comparable.
- if (A->getIndex() == B->getIndex())
- return true;
- // Non-equal FrameIndexes - If both frame indices are fixed
- // we know their relative offsets and can compare them. Otherwise
- // we must be conservative.
- if (MFI.isFixedObjectIndex(A->getIndex()) &&
- MFI.isFixedObjectIndex(B->getIndex())) {
- Off += MFI.getObjectOffset(B->getIndex()) -
- MFI.getObjectOffset(A->getIndex());
- return true;
- }
- }
- }
- return false;
-}
-
-bool BaseIndexOffset::computeAliasing(const SDNode *Op0,
- const Optional<int64_t> NumBytes0,
- const SDNode *Op1,
- const Optional<int64_t> NumBytes1,
- const SelectionDAG &DAG, bool &IsAlias) {
-
- BaseIndexOffset BasePtr0 = match(Op0, DAG);
- BaseIndexOffset BasePtr1 = match(Op1, DAG);
-
- if (!(BasePtr0.getBase().getNode() && BasePtr1.getBase().getNode()))
- return false;
- int64_t PtrDiff;
- if (NumBytes0.hasValue() && NumBytes1.hasValue() &&
- BasePtr0.equalBaseIndex(BasePtr1, DAG, PtrDiff)) {
- // BasePtr1 is PtrDiff away from BasePtr0. They alias if none of the
- // following situations arise:
- IsAlias = !(
- // [----BasePtr0----]
- // [---BasePtr1--]
- // ========PtrDiff========>
- (*NumBytes0 <= PtrDiff) ||
- // [----BasePtr0----]
- // [---BasePtr1--]
- // =====(-PtrDiff)====>
- (PtrDiff + *NumBytes1 <= 0)); // i.e. *NumBytes1 < -PtrDiff.
- return true;
- }
- // If both BasePtr0 and BasePtr1 are FrameIndexes, we will not be
- // able to calculate their relative offset if at least one arises
- // from an alloca. However, these allocas cannot overlap and we
- // can infer there is no alias.
- if (auto *A = dyn_cast<FrameIndexSDNode>(BasePtr0.getBase()))
- if (auto *B = dyn_cast<FrameIndexSDNode>(BasePtr1.getBase())) {
- MachineFrameInfo &MFI = DAG.getMachineFunction().getFrameInfo();
- // If the base are the same frame index but the we couldn't find a
- // constant offset, (indices are different) be conservative.
- if (A != B && (!MFI.isFixedObjectIndex(A->getIndex()) ||
- !MFI.isFixedObjectIndex(B->getIndex()))) {
- IsAlias = false;
- return true;
- }
- }
-
- bool IsFI0 = isa<FrameIndexSDNode>(BasePtr0.getBase());
- bool IsFI1 = isa<FrameIndexSDNode>(BasePtr1.getBase());
- bool IsGV0 = isa<GlobalAddressSDNode>(BasePtr0.getBase());
- bool IsGV1 = isa<GlobalAddressSDNode>(BasePtr1.getBase());
- bool IsCV0 = isa<ConstantPoolSDNode>(BasePtr0.getBase());
- bool IsCV1 = isa<ConstantPoolSDNode>(BasePtr1.getBase());
-
- // If of mismatched base types or checkable indices we can check
- // they do not alias.
- if ((BasePtr0.getIndex() == BasePtr1.getIndex() || (IsFI0 != IsFI1) ||
- (IsGV0 != IsGV1) || (IsCV0 != IsCV1)) &&
- (IsFI0 || IsGV0 || IsCV0) && (IsFI1 || IsGV1 || IsCV1)) {
- IsAlias = false;
- return true;
- }
- return false; // Cannot determine whether the pointers alias.
-}
-
-bool BaseIndexOffset::contains(const SelectionDAG &DAG, int64_t BitSize,
- const BaseIndexOffset &Other,
- int64_t OtherBitSize, int64_t &BitOffset) const {
- int64_t Offset;
- if (!equalBaseIndex(Other, DAG, Offset))
- return false;
- if (Offset >= 0) {
- // Other is after *this:
- // [-------*this---------]
- // [---Other--]
- // ==Offset==>
- BitOffset = 8 * Offset;
- return BitOffset + OtherBitSize <= BitSize;
- }
- // Other starts strictly before *this, it cannot be fully contained.
- // [-------*this---------]
- // [--Other--]
- return false;
-}
-
-/// Parses tree in Ptr for base, index, offset addresses.
-static BaseIndexOffset matchLSNode(const LSBaseSDNode *N,
- const SelectionDAG &DAG) {
- SDValue Ptr = N->getBasePtr();
-
- // (((B + I*M) + c)) + c ...
- SDValue Base = DAG.getTargetLoweringInfo().unwrapAddress(Ptr);
- SDValue Index = SDValue();
- int64_t Offset = 0;
- bool IsIndexSignExt = false;
-
- // pre-inc/pre-dec ops are components of EA.
- if (N->getAddressingMode() == ISD::PRE_INC) {
- if (auto *C = dyn_cast<ConstantSDNode>(N->getOffset()))
- Offset += C->getSExtValue();
- else // If unknown, give up now.
- return BaseIndexOffset(SDValue(), SDValue(), 0, false);
- } else if (N->getAddressingMode() == ISD::PRE_DEC) {
- if (auto *C = dyn_cast<ConstantSDNode>(N->getOffset()))
- Offset -= C->getSExtValue();
- else // If unknown, give up now.
- return BaseIndexOffset(SDValue(), SDValue(), 0, false);
- }
-
- // Consume constant adds & ors with appropriate masking.
- while (true) {
- switch (Base->getOpcode()) {
- case ISD::OR:
- // Only consider ORs which act as adds.
- if (auto *C = dyn_cast<ConstantSDNode>(Base->getOperand(1)))
- if (DAG.MaskedValueIsZero(Base->getOperand(0), C->getAPIntValue())) {
- Offset += C->getSExtValue();
- Base = DAG.getTargetLoweringInfo().unwrapAddress(Base->getOperand(0));
- continue;
- }
- break;
- case ISD::ADD:
- if (auto *C = dyn_cast<ConstantSDNode>(Base->getOperand(1))) {
- Offset += C->getSExtValue();
- Base = DAG.getTargetLoweringInfo().unwrapAddress(Base->getOperand(0));
- continue;
- }
- break;
- case ISD::LOAD:
- case ISD::STORE: {
- auto *LSBase = cast<LSBaseSDNode>(Base.getNode());
- unsigned int IndexResNo = (Base->getOpcode() == ISD::LOAD) ? 1 : 0;
- if (LSBase->isIndexed() && Base.getResNo() == IndexResNo)
- if (auto *C = dyn_cast<ConstantSDNode>(LSBase->getOffset())) {
- auto Off = C->getSExtValue();
- if (LSBase->getAddressingMode() == ISD::PRE_DEC ||
- LSBase->getAddressingMode() == ISD::POST_DEC)
- Offset -= Off;
- else
- Offset += Off;
- Base = DAG.getTargetLoweringInfo().unwrapAddress(LSBase->getBasePtr());
- continue;
- }
- break;
- }
- }
- // If we get here break out of the loop.
- break;
- }
-
- if (Base->getOpcode() == ISD::ADD) {
- // TODO: The following code appears to be needless as it just
- // bails on some Ptrs early, reducing the cases where we
- // find equivalence. We should be able to remove this.
- // Inside a loop the current BASE pointer is calculated using an ADD and a
- // MUL instruction. In this case Base is the actual BASE pointer.
- // (i64 add (i64 %array_ptr)
- // (i64 mul (i64 %induction_var)
- // (i64 %element_size)))
- if (Base->getOperand(1)->getOpcode() == ISD::MUL)
- return BaseIndexOffset(Base, Index, Offset, IsIndexSignExt);
-
- // Look at Base + Index + Offset cases.
- Index = Base->getOperand(1);
- SDValue PotentialBase = Base->getOperand(0);
-
- // Skip signextends.
- if (Index->getOpcode() == ISD::SIGN_EXTEND) {
- Index = Index->getOperand(0);
- IsIndexSignExt = true;
- }
-
- // Check if Index Offset pattern
- if (Index->getOpcode() != ISD::ADD ||
- !isa<ConstantSDNode>(Index->getOperand(1)))
- return BaseIndexOffset(PotentialBase, Index, Offset, IsIndexSignExt);
-
- Offset += cast<ConstantSDNode>(Index->getOperand(1))->getSExtValue();
- Index = Index->getOperand(0);
- if (Index->getOpcode() == ISD::SIGN_EXTEND) {
- Index = Index->getOperand(0);
- IsIndexSignExt = true;
- } else
- IsIndexSignExt = false;
- Base = PotentialBase;
- }
- return BaseIndexOffset(Base, Index, Offset, IsIndexSignExt);
-}
-
-BaseIndexOffset BaseIndexOffset::match(const SDNode *N,
- const SelectionDAG &DAG) {
- if (const auto *LS0 = dyn_cast<LSBaseSDNode>(N))
- return matchLSNode(LS0, DAG);
- if (const auto *LN = dyn_cast<LifetimeSDNode>(N)) {
- if (LN->hasOffset())
- return BaseIndexOffset(LN->getOperand(1), SDValue(), LN->getOffset(),
- false);
- return BaseIndexOffset(LN->getOperand(1), SDValue(), false);
- }
- return BaseIndexOffset();
-}
-
-#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
-
-LLVM_DUMP_METHOD void BaseIndexOffset::dump() const {
- print(dbgs());
-}
-
-void BaseIndexOffset::print(raw_ostream& OS) const {
- OS << "BaseIndexOffset base=[";
- Base->print(OS);
- OS << "] index=[";
- if (Index)
- Index->print(OS);
- OS << "] offset=" << Offset;
-}
-
-#endif
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