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https://github.com/c64scene-ar/llvm-6502.git
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b13f72aa2d
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@241804 91177308-0d34-0410-b5e6-96231b3b80d8
2511 lines
97 KiB
C++
2511 lines
97 KiB
C++
//===-- HexagonISelLowering.cpp - Hexagon DAG Lowering Implementation -----===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the interfaces that Hexagon uses to lower LLVM code
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// into a selection DAG.
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//
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//===----------------------------------------------------------------------===//
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#include "HexagonISelLowering.h"
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#include "HexagonMachineFunctionInfo.h"
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#include "HexagonSubtarget.h"
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#include "HexagonTargetMachine.h"
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#include "HexagonTargetObjectFile.h"
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#include "llvm/CodeGen/CallingConvLower.h"
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#include "llvm/CodeGen/MachineFrameInfo.h"
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#include "llvm/CodeGen/MachineFunction.h"
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#include "llvm/CodeGen/MachineInstrBuilder.h"
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#include "llvm/CodeGen/MachineJumpTableInfo.h"
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#include "llvm/CodeGen/MachineRegisterInfo.h"
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#include "llvm/CodeGen/SelectionDAGISel.h"
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#include "llvm/CodeGen/ValueTypes.h"
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#include "llvm/IR/CallingConv.h"
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#include "llvm/IR/DerivedTypes.h"
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#include "llvm/IR/Function.h"
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#include "llvm/IR/GlobalAlias.h"
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#include "llvm/IR/GlobalVariable.h"
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#include "llvm/IR/InlineAsm.h"
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#include "llvm/IR/Intrinsics.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/raw_ostream.h"
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using namespace llvm;
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#define DEBUG_TYPE "hexagon-lowering"
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static cl::opt<bool>
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EmitJumpTables("hexagon-emit-jump-tables", cl::init(true), cl::Hidden,
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cl::desc("Control jump table emission on Hexagon target"));
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static cl::opt<bool> EnableHexSDNodeSched("enable-hexagon-sdnode-sched",
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cl::Hidden, cl::ZeroOrMore, cl::init(false),
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cl::desc("Enable Hexagon SDNode scheduling"));
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static cl::opt<bool> EnableFastMath("ffast-math",
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cl::Hidden, cl::ZeroOrMore, cl::init(false),
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cl::desc("Enable Fast Math processing"));
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static cl::opt<int> MinimumJumpTables("minimum-jump-tables",
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cl::Hidden, cl::ZeroOrMore, cl::init(5),
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cl::desc("Set minimum jump tables"));
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static cl::opt<int> MaxStoresPerMemcpyCL("max-store-memcpy",
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cl::Hidden, cl::ZeroOrMore, cl::init(6),
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cl::desc("Max #stores to inline memcpy"));
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static cl::opt<int> MaxStoresPerMemcpyOptSizeCL("max-store-memcpy-Os",
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cl::Hidden, cl::ZeroOrMore, cl::init(4),
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cl::desc("Max #stores to inline memcpy"));
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static cl::opt<int> MaxStoresPerMemmoveCL("max-store-memmove",
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cl::Hidden, cl::ZeroOrMore, cl::init(6),
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cl::desc("Max #stores to inline memmove"));
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static cl::opt<int> MaxStoresPerMemmoveOptSizeCL("max-store-memmove-Os",
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cl::Hidden, cl::ZeroOrMore, cl::init(4),
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cl::desc("Max #stores to inline memmove"));
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static cl::opt<int> MaxStoresPerMemsetCL("max-store-memset",
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cl::Hidden, cl::ZeroOrMore, cl::init(8),
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cl::desc("Max #stores to inline memset"));
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static cl::opt<int> MaxStoresPerMemsetOptSizeCL("max-store-memset-Os",
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cl::Hidden, cl::ZeroOrMore, cl::init(4),
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cl::desc("Max #stores to inline memset"));
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namespace {
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class HexagonCCState : public CCState {
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unsigned NumNamedVarArgParams;
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public:
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HexagonCCState(CallingConv::ID CC, bool isVarArg, MachineFunction &MF,
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SmallVectorImpl<CCValAssign> &locs, LLVMContext &C,
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int NumNamedVarArgParams)
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: CCState(CC, isVarArg, MF, locs, C),
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NumNamedVarArgParams(NumNamedVarArgParams) {}
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unsigned getNumNamedVarArgParams() const { return NumNamedVarArgParams; }
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};
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}
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// Implement calling convention for Hexagon.
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static bool
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CC_Hexagon(unsigned ValNo, MVT ValVT,
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MVT LocVT, CCValAssign::LocInfo LocInfo,
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ISD::ArgFlagsTy ArgFlags, CCState &State);
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static bool
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CC_Hexagon32(unsigned ValNo, MVT ValVT,
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MVT LocVT, CCValAssign::LocInfo LocInfo,
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ISD::ArgFlagsTy ArgFlags, CCState &State);
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static bool
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CC_Hexagon64(unsigned ValNo, MVT ValVT,
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MVT LocVT, CCValAssign::LocInfo LocInfo,
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ISD::ArgFlagsTy ArgFlags, CCState &State);
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static bool
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RetCC_Hexagon(unsigned ValNo, MVT ValVT,
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MVT LocVT, CCValAssign::LocInfo LocInfo,
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ISD::ArgFlagsTy ArgFlags, CCState &State);
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static bool
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RetCC_Hexagon32(unsigned ValNo, MVT ValVT,
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MVT LocVT, CCValAssign::LocInfo LocInfo,
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ISD::ArgFlagsTy ArgFlags, CCState &State);
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static bool
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RetCC_Hexagon64(unsigned ValNo, MVT ValVT,
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MVT LocVT, CCValAssign::LocInfo LocInfo,
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ISD::ArgFlagsTy ArgFlags, CCState &State);
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static bool
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CC_Hexagon_VarArg (unsigned ValNo, MVT ValVT,
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MVT LocVT, CCValAssign::LocInfo LocInfo,
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ISD::ArgFlagsTy ArgFlags, CCState &State) {
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HexagonCCState &HState = static_cast<HexagonCCState &>(State);
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if (ValNo < HState.getNumNamedVarArgParams()) {
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// Deal with named arguments.
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return CC_Hexagon(ValNo, ValVT, LocVT, LocInfo, ArgFlags, State);
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}
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// Deal with un-named arguments.
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unsigned ofst;
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if (ArgFlags.isByVal()) {
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// If pass-by-value, the size allocated on stack is decided
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// by ArgFlags.getByValSize(), not by the size of LocVT.
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ofst = State.AllocateStack(ArgFlags.getByValSize(),
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ArgFlags.getByValAlign());
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State.addLoc(CCValAssign::getMem(ValNo, ValVT, ofst, LocVT, LocInfo));
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return false;
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}
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if (LocVT == MVT::i1 || LocVT == MVT::i8 || LocVT == MVT::i16) {
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LocVT = MVT::i32;
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ValVT = MVT::i32;
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if (ArgFlags.isSExt())
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LocInfo = CCValAssign::SExt;
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else if (ArgFlags.isZExt())
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LocInfo = CCValAssign::ZExt;
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else
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LocInfo = CCValAssign::AExt;
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}
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if (LocVT == MVT::i32 || LocVT == MVT::f32) {
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ofst = State.AllocateStack(4, 4);
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State.addLoc(CCValAssign::getMem(ValNo, ValVT, ofst, LocVT, LocInfo));
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return false;
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}
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if (LocVT == MVT::i64 || LocVT == MVT::f64) {
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ofst = State.AllocateStack(8, 8);
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State.addLoc(CCValAssign::getMem(ValNo, ValVT, ofst, LocVT, LocInfo));
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return false;
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}
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llvm_unreachable(nullptr);
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}
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static bool
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CC_Hexagon (unsigned ValNo, MVT ValVT,
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MVT LocVT, CCValAssign::LocInfo LocInfo,
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ISD::ArgFlagsTy ArgFlags, CCState &State) {
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if (ArgFlags.isByVal()) {
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// Passed on stack.
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unsigned Offset = State.AllocateStack(ArgFlags.getByValSize(),
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ArgFlags.getByValAlign());
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State.addLoc(CCValAssign::getMem(ValNo, ValVT, Offset, LocVT, LocInfo));
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return false;
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}
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if (LocVT == MVT::i1 || LocVT == MVT::i8 || LocVT == MVT::i16) {
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LocVT = MVT::i32;
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ValVT = MVT::i32;
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if (ArgFlags.isSExt())
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LocInfo = CCValAssign::SExt;
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else if (ArgFlags.isZExt())
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LocInfo = CCValAssign::ZExt;
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else
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LocInfo = CCValAssign::AExt;
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} else if (LocVT == MVT::v4i8 || LocVT == MVT::v2i16) {
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LocVT = MVT::i32;
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LocInfo = CCValAssign::BCvt;
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} else if (LocVT == MVT::v8i8 || LocVT == MVT::v4i16 || LocVT == MVT::v2i32) {
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LocVT = MVT::i64;
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LocInfo = CCValAssign::BCvt;
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}
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if (LocVT == MVT::i32 || LocVT == MVT::f32) {
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if (!CC_Hexagon32(ValNo, ValVT, LocVT, LocInfo, ArgFlags, State))
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return false;
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}
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if (LocVT == MVT::i64 || LocVT == MVT::f64) {
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if (!CC_Hexagon64(ValNo, ValVT, LocVT, LocInfo, ArgFlags, State))
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return false;
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}
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return true; // CC didn't match.
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}
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static bool CC_Hexagon32(unsigned ValNo, MVT ValVT,
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MVT LocVT, CCValAssign::LocInfo LocInfo,
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ISD::ArgFlagsTy ArgFlags, CCState &State) {
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static const MCPhysReg RegList[] = {
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Hexagon::R0, Hexagon::R1, Hexagon::R2, Hexagon::R3, Hexagon::R4,
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Hexagon::R5
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};
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if (unsigned Reg = State.AllocateReg(RegList)) {
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State.addLoc(CCValAssign::getReg(ValNo, ValVT, Reg, LocVT, LocInfo));
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return false;
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}
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unsigned Offset = State.AllocateStack(4, 4);
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State.addLoc(CCValAssign::getMem(ValNo, ValVT, Offset, LocVT, LocInfo));
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return false;
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}
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static bool CC_Hexagon64(unsigned ValNo, MVT ValVT,
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MVT LocVT, CCValAssign::LocInfo LocInfo,
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ISD::ArgFlagsTy ArgFlags, CCState &State) {
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if (unsigned Reg = State.AllocateReg(Hexagon::D0)) {
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State.addLoc(CCValAssign::getReg(ValNo, ValVT, Reg, LocVT, LocInfo));
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return false;
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}
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static const MCPhysReg RegList1[] = {
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Hexagon::D1, Hexagon::D2
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};
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static const MCPhysReg RegList2[] = {
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Hexagon::R1, Hexagon::R3
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};
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if (unsigned Reg = State.AllocateReg(RegList1, RegList2)) {
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State.addLoc(CCValAssign::getReg(ValNo, ValVT, Reg, LocVT, LocInfo));
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return false;
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}
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unsigned Offset = State.AllocateStack(8, 8, Hexagon::D2);
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State.addLoc(CCValAssign::getMem(ValNo, ValVT, Offset, LocVT, LocInfo));
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return false;
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}
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static bool RetCC_Hexagon(unsigned ValNo, MVT ValVT,
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MVT LocVT, CCValAssign::LocInfo LocInfo,
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ISD::ArgFlagsTy ArgFlags, CCState &State) {
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if (LocVT == MVT::i1 ||
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LocVT == MVT::i8 ||
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LocVT == MVT::i16) {
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LocVT = MVT::i32;
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ValVT = MVT::i32;
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if (ArgFlags.isSExt())
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LocInfo = CCValAssign::SExt;
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else if (ArgFlags.isZExt())
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LocInfo = CCValAssign::ZExt;
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else
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LocInfo = CCValAssign::AExt;
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} else if (LocVT == MVT::v4i8 || LocVT == MVT::v2i16) {
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LocVT = MVT::i32;
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LocInfo = CCValAssign::BCvt;
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} else if (LocVT == MVT::v8i8 || LocVT == MVT::v4i16 || LocVT == MVT::v2i32) {
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LocVT = MVT::i64;
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LocInfo = CCValAssign::BCvt;
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}
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if (LocVT == MVT::i32 || LocVT == MVT::f32) {
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if (!RetCC_Hexagon32(ValNo, ValVT, LocVT, LocInfo, ArgFlags, State))
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return false;
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}
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if (LocVT == MVT::i64 || LocVT == MVT::f64) {
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if (!RetCC_Hexagon64(ValNo, ValVT, LocVT, LocInfo, ArgFlags, State))
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return false;
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}
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return true; // CC didn't match.
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}
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static bool RetCC_Hexagon32(unsigned ValNo, MVT ValVT,
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MVT LocVT, CCValAssign::LocInfo LocInfo,
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ISD::ArgFlagsTy ArgFlags, CCState &State) {
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if (LocVT == MVT::i32 || LocVT == MVT::f32) {
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if (unsigned Reg = State.AllocateReg(Hexagon::R0)) {
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State.addLoc(CCValAssign::getReg(ValNo, ValVT, Reg, LocVT, LocInfo));
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return false;
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}
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}
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unsigned Offset = State.AllocateStack(4, 4);
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State.addLoc(CCValAssign::getMem(ValNo, ValVT, Offset, LocVT, LocInfo));
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return false;
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}
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static bool RetCC_Hexagon64(unsigned ValNo, MVT ValVT,
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MVT LocVT, CCValAssign::LocInfo LocInfo,
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ISD::ArgFlagsTy ArgFlags, CCState &State) {
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if (LocVT == MVT::i64 || LocVT == MVT::f64) {
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if (unsigned Reg = State.AllocateReg(Hexagon::D0)) {
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State.addLoc(CCValAssign::getReg(ValNo, ValVT, Reg, LocVT, LocInfo));
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return false;
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}
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}
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unsigned Offset = State.AllocateStack(8, 8);
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State.addLoc(CCValAssign::getMem(ValNo, ValVT, Offset, LocVT, LocInfo));
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return false;
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}
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SDValue
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HexagonTargetLowering::LowerINTRINSIC_WO_CHAIN(SDValue Op, SelectionDAG &DAG)
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const {
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return SDValue();
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}
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/// CreateCopyOfByValArgument - Make a copy of an aggregate at address specified
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/// by "Src" to address "Dst" of size "Size". Alignment information is
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/// specified by the specific parameter attribute. The copy will be passed as
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/// a byval function parameter. Sometimes what we are copying is the end of a
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/// larger object, the part that does not fit in registers.
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static SDValue
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CreateCopyOfByValArgument(SDValue Src, SDValue Dst, SDValue Chain,
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ISD::ArgFlagsTy Flags, SelectionDAG &DAG,
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SDLoc dl) {
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SDValue SizeNode = DAG.getConstant(Flags.getByValSize(), dl, MVT::i32);
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return DAG.getMemcpy(Chain, dl, Dst, Src, SizeNode, Flags.getByValAlign(),
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/*isVolatile=*/false, /*AlwaysInline=*/false,
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/*isTailCall=*/false,
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MachinePointerInfo(), MachinePointerInfo());
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}
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// LowerReturn - Lower ISD::RET. If a struct is larger than 8 bytes and is
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// passed by value, the function prototype is modified to return void and
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// the value is stored in memory pointed by a pointer passed by caller.
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SDValue
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HexagonTargetLowering::LowerReturn(SDValue Chain,
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CallingConv::ID CallConv, bool isVarArg,
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const SmallVectorImpl<ISD::OutputArg> &Outs,
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const SmallVectorImpl<SDValue> &OutVals,
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SDLoc dl, SelectionDAG &DAG) const {
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// CCValAssign - represent the assignment of the return value to locations.
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SmallVector<CCValAssign, 16> RVLocs;
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// CCState - Info about the registers and stack slot.
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CCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(), RVLocs,
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*DAG.getContext());
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// Analyze return values of ISD::RET
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CCInfo.AnalyzeReturn(Outs, RetCC_Hexagon);
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SDValue Flag;
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SmallVector<SDValue, 4> RetOps(1, Chain);
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// Copy the result values into the output registers.
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for (unsigned i = 0; i != RVLocs.size(); ++i) {
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CCValAssign &VA = RVLocs[i];
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Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(), OutVals[i], Flag);
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// Guarantee that all emitted copies are stuck together with flags.
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Flag = Chain.getValue(1);
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RetOps.push_back(DAG.getRegister(VA.getLocReg(), VA.getLocVT()));
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}
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RetOps[0] = Chain; // Update chain.
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// Add the flag if we have it.
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if (Flag.getNode())
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RetOps.push_back(Flag);
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return DAG.getNode(HexagonISD::RET_FLAG, dl, MVT::Other, RetOps);
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}
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bool HexagonTargetLowering::mayBeEmittedAsTailCall(CallInst *CI) const {
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// If either no tail call or told not to tail call at all, don't.
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auto Attr =
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CI->getParent()->getParent()->getFnAttribute("disable-tail-calls");
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if (!CI->isTailCall() || Attr.getValueAsString() == "true")
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return false;
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return true;
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}
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/// LowerCallResult - Lower the result values of an ISD::CALL into the
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/// appropriate copies out of appropriate physical registers. This assumes that
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/// Chain/InFlag are the input chain/flag to use, and that TheCall is the call
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/// being lowered. Returns a SDNode with the same number of values as the
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/// ISD::CALL.
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SDValue
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HexagonTargetLowering::LowerCallResult(SDValue Chain, SDValue InFlag,
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CallingConv::ID CallConv, bool isVarArg,
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const
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SmallVectorImpl<ISD::InputArg> &Ins,
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SDLoc dl, SelectionDAG &DAG,
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SmallVectorImpl<SDValue> &InVals,
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const SmallVectorImpl<SDValue> &OutVals,
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SDValue Callee) const {
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// Assign locations to each value returned by this call.
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SmallVector<CCValAssign, 16> RVLocs;
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CCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(), RVLocs,
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*DAG.getContext());
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CCInfo.AnalyzeCallResult(Ins, RetCC_Hexagon);
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// Copy all of the result registers out of their specified physreg.
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for (unsigned i = 0; i != RVLocs.size(); ++i) {
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Chain = DAG.getCopyFromReg(Chain, dl,
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RVLocs[i].getLocReg(),
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RVLocs[i].getValVT(), InFlag).getValue(1);
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InFlag = Chain.getValue(2);
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InVals.push_back(Chain.getValue(0));
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}
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return Chain;
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}
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/// LowerCall - Functions arguments are copied from virtual regs to
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/// (physical regs)/(stack frame), CALLSEQ_START and CALLSEQ_END are emitted.
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SDValue
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HexagonTargetLowering::LowerCall(TargetLowering::CallLoweringInfo &CLI,
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SmallVectorImpl<SDValue> &InVals) const {
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SelectionDAG &DAG = CLI.DAG;
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SDLoc &dl = CLI.DL;
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SmallVectorImpl<ISD::OutputArg> &Outs = CLI.Outs;
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SmallVectorImpl<SDValue> &OutVals = CLI.OutVals;
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SmallVectorImpl<ISD::InputArg> &Ins = CLI.Ins;
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SDValue Chain = CLI.Chain;
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SDValue Callee = CLI.Callee;
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bool &isTailCall = CLI.IsTailCall;
|
|
CallingConv::ID CallConv = CLI.CallConv;
|
|
bool isVarArg = CLI.IsVarArg;
|
|
bool doesNotReturn = CLI.DoesNotReturn;
|
|
|
|
bool IsStructRet = (Outs.empty()) ? false : Outs[0].Flags.isSRet();
|
|
MachineFunction &MF = DAG.getMachineFunction();
|
|
auto PtrVT = getPointerTy(MF.getDataLayout());
|
|
|
|
// Check for varargs.
|
|
int NumNamedVarArgParams = -1;
|
|
if (GlobalAddressSDNode *GA = dyn_cast<GlobalAddressSDNode>(Callee))
|
|
{
|
|
const Function* CalleeFn = nullptr;
|
|
Callee = DAG.getTargetGlobalAddress(GA->getGlobal(), dl, MVT::i32);
|
|
if ((CalleeFn = dyn_cast<Function>(GA->getGlobal())))
|
|
{
|
|
// If a function has zero args and is a vararg function, that's
|
|
// disallowed so it must be an undeclared function. Do not assume
|
|
// varargs if the callee is undefined.
|
|
if (CalleeFn->isVarArg() &&
|
|
CalleeFn->getFunctionType()->getNumParams() != 0) {
|
|
NumNamedVarArgParams = CalleeFn->getFunctionType()->getNumParams();
|
|
}
|
|
}
|
|
}
|
|
|
|
// Analyze operands of the call, assigning locations to each operand.
|
|
SmallVector<CCValAssign, 16> ArgLocs;
|
|
HexagonCCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(), ArgLocs,
|
|
*DAG.getContext(), NumNamedVarArgParams);
|
|
|
|
if (isVarArg)
|
|
CCInfo.AnalyzeCallOperands(Outs, CC_Hexagon_VarArg);
|
|
else
|
|
CCInfo.AnalyzeCallOperands(Outs, CC_Hexagon);
|
|
|
|
auto Attr = MF.getFunction()->getFnAttribute("disable-tail-calls");
|
|
if (Attr.getValueAsString() == "true")
|
|
isTailCall = false;
|
|
|
|
if (isTailCall) {
|
|
bool StructAttrFlag = MF.getFunction()->hasStructRetAttr();
|
|
isTailCall = IsEligibleForTailCallOptimization(Callee, CallConv,
|
|
isVarArg, IsStructRet,
|
|
StructAttrFlag,
|
|
Outs, OutVals, Ins, DAG);
|
|
for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
|
|
CCValAssign &VA = ArgLocs[i];
|
|
if (VA.isMemLoc()) {
|
|
isTailCall = false;
|
|
break;
|
|
}
|
|
}
|
|
DEBUG(dbgs() << (isTailCall ? "Eligible for Tail Call\n"
|
|
: "Argument must be passed on stack. "
|
|
"Not eligible for Tail Call\n"));
|
|
}
|
|
// Get a count of how many bytes are to be pushed on the stack.
|
|
unsigned NumBytes = CCInfo.getNextStackOffset();
|
|
SmallVector<std::pair<unsigned, SDValue>, 16> RegsToPass;
|
|
SmallVector<SDValue, 8> MemOpChains;
|
|
|
|
auto &HRI = *Subtarget.getRegisterInfo();
|
|
SDValue StackPtr =
|
|
DAG.getCopyFromReg(Chain, dl, HRI.getStackRegister(), PtrVT);
|
|
|
|
// Walk the register/memloc assignments, inserting copies/loads.
|
|
for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
|
|
CCValAssign &VA = ArgLocs[i];
|
|
SDValue Arg = OutVals[i];
|
|
ISD::ArgFlagsTy Flags = Outs[i].Flags;
|
|
|
|
// Promote the value if needed.
|
|
switch (VA.getLocInfo()) {
|
|
default:
|
|
// Loc info must be one of Full, SExt, ZExt, or AExt.
|
|
llvm_unreachable("Unknown loc info!");
|
|
case CCValAssign::BCvt:
|
|
case CCValAssign::Full:
|
|
break;
|
|
case CCValAssign::SExt:
|
|
Arg = DAG.getNode(ISD::SIGN_EXTEND, dl, VA.getLocVT(), Arg);
|
|
break;
|
|
case CCValAssign::ZExt:
|
|
Arg = DAG.getNode(ISD::ZERO_EXTEND, dl, VA.getLocVT(), Arg);
|
|
break;
|
|
case CCValAssign::AExt:
|
|
Arg = DAG.getNode(ISD::ANY_EXTEND, dl, VA.getLocVT(), Arg);
|
|
break;
|
|
}
|
|
|
|
if (VA.isMemLoc()) {
|
|
unsigned LocMemOffset = VA.getLocMemOffset();
|
|
SDValue MemAddr = DAG.getConstant(LocMemOffset, dl,
|
|
StackPtr.getValueType());
|
|
MemAddr = DAG.getNode(ISD::ADD, dl, MVT::i32, StackPtr, MemAddr);
|
|
if (Flags.isByVal()) {
|
|
// The argument is a struct passed by value. According to LLVM, "Arg"
|
|
// is is pointer.
|
|
MemOpChains.push_back(CreateCopyOfByValArgument(Arg, MemAddr, Chain,
|
|
Flags, DAG, dl));
|
|
} else {
|
|
MachinePointerInfo LocPI = MachinePointerInfo::getStack(LocMemOffset);
|
|
SDValue S = DAG.getStore(Chain, dl, Arg, MemAddr, LocPI, false,
|
|
false, 0);
|
|
MemOpChains.push_back(S);
|
|
}
|
|
continue;
|
|
}
|
|
|
|
// Arguments that can be passed on register must be kept at RegsToPass
|
|
// vector.
|
|
if (VA.isRegLoc())
|
|
RegsToPass.push_back(std::make_pair(VA.getLocReg(), Arg));
|
|
}
|
|
|
|
// Transform all store nodes into one single node because all store
|
|
// nodes are independent of each other.
|
|
if (!MemOpChains.empty())
|
|
Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, MemOpChains);
|
|
|
|
if (!isTailCall) {
|
|
SDValue C = DAG.getConstant(NumBytes, dl, PtrVT, true);
|
|
Chain = DAG.getCALLSEQ_START(Chain, C, dl);
|
|
}
|
|
|
|
// Build a sequence of copy-to-reg nodes chained together with token
|
|
// chain and flag operands which copy the outgoing args into registers.
|
|
// The InFlag in necessary since all emitted instructions must be
|
|
// stuck together.
|
|
SDValue InFlag;
|
|
if (!isTailCall) {
|
|
for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
|
|
Chain = DAG.getCopyToReg(Chain, dl, RegsToPass[i].first,
|
|
RegsToPass[i].second, InFlag);
|
|
InFlag = Chain.getValue(1);
|
|
}
|
|
} else {
|
|
// For tail calls lower the arguments to the 'real' stack slot.
|
|
//
|
|
// Force all the incoming stack arguments to be loaded from the stack
|
|
// before any new outgoing arguments are stored to the stack, because the
|
|
// outgoing stack slots may alias the incoming argument stack slots, and
|
|
// the alias isn't otherwise explicit. This is slightly more conservative
|
|
// than necessary, because it means that each store effectively depends
|
|
// on every argument instead of just those arguments it would clobber.
|
|
//
|
|
// Do not flag preceding copytoreg stuff together with the following stuff.
|
|
InFlag = SDValue();
|
|
for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
|
|
Chain = DAG.getCopyToReg(Chain, dl, RegsToPass[i].first,
|
|
RegsToPass[i].second, InFlag);
|
|
InFlag = Chain.getValue(1);
|
|
}
|
|
InFlag = SDValue();
|
|
}
|
|
|
|
// If the callee is a GlobalAddress/ExternalSymbol node (quite common, every
|
|
// direct call is) turn it into a TargetGlobalAddress/TargetExternalSymbol
|
|
// node so that legalize doesn't hack it.
|
|
if (flag_aligned_memcpy) {
|
|
const char *MemcpyName =
|
|
"__hexagon_memcpy_likely_aligned_min32bytes_mult8bytes";
|
|
Callee = DAG.getTargetExternalSymbol(MemcpyName, PtrVT);
|
|
flag_aligned_memcpy = false;
|
|
} else if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
|
|
Callee = DAG.getTargetGlobalAddress(G->getGlobal(), dl, PtrVT);
|
|
} else if (ExternalSymbolSDNode *S =
|
|
dyn_cast<ExternalSymbolSDNode>(Callee)) {
|
|
Callee = DAG.getTargetExternalSymbol(S->getSymbol(), PtrVT);
|
|
}
|
|
|
|
// Returns a chain & a flag for retval copy to use.
|
|
SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue);
|
|
SmallVector<SDValue, 8> Ops;
|
|
Ops.push_back(Chain);
|
|
Ops.push_back(Callee);
|
|
|
|
// Add argument registers to the end of the list so that they are
|
|
// known live into the call.
|
|
for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
|
|
Ops.push_back(DAG.getRegister(RegsToPass[i].first,
|
|
RegsToPass[i].second.getValueType()));
|
|
}
|
|
|
|
if (InFlag.getNode())
|
|
Ops.push_back(InFlag);
|
|
|
|
if (isTailCall) {
|
|
MF.getFrameInfo()->setHasTailCall();
|
|
return DAG.getNode(HexagonISD::TC_RETURN, dl, NodeTys, Ops);
|
|
}
|
|
|
|
int OpCode = doesNotReturn ? HexagonISD::CALLv3nr : HexagonISD::CALLv3;
|
|
Chain = DAG.getNode(OpCode, dl, NodeTys, Ops);
|
|
InFlag = Chain.getValue(1);
|
|
|
|
// Create the CALLSEQ_END node.
|
|
Chain = DAG.getCALLSEQ_END(Chain, DAG.getIntPtrConstant(NumBytes, dl, true),
|
|
DAG.getIntPtrConstant(0, dl, true), InFlag, dl);
|
|
InFlag = Chain.getValue(1);
|
|
|
|
// Handle result values, copying them out of physregs into vregs that we
|
|
// return.
|
|
return LowerCallResult(Chain, InFlag, CallConv, isVarArg, Ins, dl, DAG,
|
|
InVals, OutVals, Callee);
|
|
}
|
|
|
|
static bool getIndexedAddressParts(SDNode *Ptr, EVT VT,
|
|
bool isSEXTLoad, SDValue &Base,
|
|
SDValue &Offset, bool &isInc,
|
|
SelectionDAG &DAG) {
|
|
if (Ptr->getOpcode() != ISD::ADD)
|
|
return false;
|
|
|
|
if (VT == MVT::i64 || VT == MVT::i32 || VT == MVT::i16 || VT == MVT::i8) {
|
|
isInc = (Ptr->getOpcode() == ISD::ADD);
|
|
Base = Ptr->getOperand(0);
|
|
Offset = Ptr->getOperand(1);
|
|
// Ensure that Offset is a constant.
|
|
return (isa<ConstantSDNode>(Offset));
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
// TODO: Put this function along with the other isS* functions in
|
|
// HexagonISelDAGToDAG.cpp into a common file. Or better still, use the
|
|
// functions defined in HexagonOperands.td.
|
|
static bool Is_PostInc_S4_Offset(SDNode * S, int ShiftAmount) {
|
|
ConstantSDNode *N = cast<ConstantSDNode>(S);
|
|
|
|
// immS4 predicate - True if the immediate fits in a 4-bit sign extended.
|
|
// field.
|
|
int64_t v = (int64_t)N->getSExtValue();
|
|
int64_t m = 0;
|
|
if (ShiftAmount > 0) {
|
|
m = v % ShiftAmount;
|
|
v = v >> ShiftAmount;
|
|
}
|
|
return (v <= 7) && (v >= -8) && (m == 0);
|
|
}
|
|
|
|
/// getPostIndexedAddressParts - returns true by value, base pointer and
|
|
/// offset pointer and addressing mode by reference if this node can be
|
|
/// combined with a load / store to form a post-indexed load / store.
|
|
bool HexagonTargetLowering::getPostIndexedAddressParts(SDNode *N, SDNode *Op,
|
|
SDValue &Base,
|
|
SDValue &Offset,
|
|
ISD::MemIndexedMode &AM,
|
|
SelectionDAG &DAG) const
|
|
{
|
|
EVT VT;
|
|
SDValue Ptr;
|
|
bool isSEXTLoad = false;
|
|
|
|
if (LoadSDNode *LD = dyn_cast<LoadSDNode>(N)) {
|
|
VT = LD->getMemoryVT();
|
|
isSEXTLoad = LD->getExtensionType() == ISD::SEXTLOAD;
|
|
} else if (StoreSDNode *ST = dyn_cast<StoreSDNode>(N)) {
|
|
VT = ST->getMemoryVT();
|
|
if (ST->getValue().getValueType() == MVT::i64 && ST->isTruncatingStore()) {
|
|
return false;
|
|
}
|
|
} else {
|
|
return false;
|
|
}
|
|
|
|
bool isInc = false;
|
|
bool isLegal = getIndexedAddressParts(Op, VT, isSEXTLoad, Base, Offset,
|
|
isInc, DAG);
|
|
// ShiftAmount = number of left-shifted bits in the Hexagon instruction.
|
|
int ShiftAmount = VT.getSizeInBits() / 16;
|
|
if (isLegal && Is_PostInc_S4_Offset(Offset.getNode(), ShiftAmount)) {
|
|
AM = isInc ? ISD::POST_INC : ISD::POST_DEC;
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
SDValue HexagonTargetLowering::LowerINLINEASM(SDValue Op,
|
|
SelectionDAG &DAG) const {
|
|
SDNode *Node = Op.getNode();
|
|
MachineFunction &MF = DAG.getMachineFunction();
|
|
auto &FuncInfo = *MF.getInfo<HexagonMachineFunctionInfo>();
|
|
switch (Node->getOpcode()) {
|
|
case ISD::INLINEASM: {
|
|
unsigned NumOps = Node->getNumOperands();
|
|
if (Node->getOperand(NumOps-1).getValueType() == MVT::Glue)
|
|
--NumOps; // Ignore the flag operand.
|
|
|
|
for (unsigned i = InlineAsm::Op_FirstOperand; i != NumOps;) {
|
|
if (FuncInfo.hasClobberLR())
|
|
break;
|
|
unsigned Flags =
|
|
cast<ConstantSDNode>(Node->getOperand(i))->getZExtValue();
|
|
unsigned NumVals = InlineAsm::getNumOperandRegisters(Flags);
|
|
++i; // Skip the ID value.
|
|
|
|
switch (InlineAsm::getKind(Flags)) {
|
|
default: llvm_unreachable("Bad flags!");
|
|
case InlineAsm::Kind_RegDef:
|
|
case InlineAsm::Kind_RegUse:
|
|
case InlineAsm::Kind_Imm:
|
|
case InlineAsm::Kind_Clobber:
|
|
case InlineAsm::Kind_Mem: {
|
|
for (; NumVals; --NumVals, ++i) {}
|
|
break;
|
|
}
|
|
case InlineAsm::Kind_RegDefEarlyClobber: {
|
|
for (; NumVals; --NumVals, ++i) {
|
|
unsigned Reg =
|
|
cast<RegisterSDNode>(Node->getOperand(i))->getReg();
|
|
|
|
// Check it to be lr
|
|
const HexagonRegisterInfo *QRI = Subtarget.getRegisterInfo();
|
|
if (Reg == QRI->getRARegister()) {
|
|
FuncInfo.setHasClobberLR(true);
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
} // Node->getOpcode
|
|
return Op;
|
|
}
|
|
|
|
|
|
//
|
|
// Taken from the XCore backend.
|
|
//
|
|
SDValue HexagonTargetLowering::
|
|
LowerBR_JT(SDValue Op, SelectionDAG &DAG) const
|
|
{
|
|
SDValue Chain = Op.getOperand(0);
|
|
SDValue Table = Op.getOperand(1);
|
|
SDValue Index = Op.getOperand(2);
|
|
SDLoc dl(Op);
|
|
JumpTableSDNode *JT = cast<JumpTableSDNode>(Table);
|
|
unsigned JTI = JT->getIndex();
|
|
MachineFunction &MF = DAG.getMachineFunction();
|
|
const MachineJumpTableInfo *MJTI = MF.getJumpTableInfo();
|
|
SDValue TargetJT = DAG.getTargetJumpTable(JT->getIndex(), MVT::i32);
|
|
|
|
// Mark all jump table targets as address taken.
|
|
const std::vector<MachineJumpTableEntry> &JTE = MJTI->getJumpTables();
|
|
const std::vector<MachineBasicBlock*> &JTBBs = JTE[JTI].MBBs;
|
|
for (unsigned i = 0, e = JTBBs.size(); i != e; ++i) {
|
|
MachineBasicBlock *MBB = JTBBs[i];
|
|
MBB->setHasAddressTaken();
|
|
// This line is needed to set the hasAddressTaken flag on the BasicBlock
|
|
// object.
|
|
BlockAddress::get(const_cast<BasicBlock *>(MBB->getBasicBlock()));
|
|
}
|
|
|
|
SDValue JumpTableBase = DAG.getNode(
|
|
HexagonISD::JT, dl, getPointerTy(DAG.getDataLayout()), TargetJT);
|
|
SDValue ShiftIndex = DAG.getNode(ISD::SHL, dl, MVT::i32, Index,
|
|
DAG.getConstant(2, dl, MVT::i32));
|
|
SDValue JTAddress = DAG.getNode(ISD::ADD, dl, MVT::i32, JumpTableBase,
|
|
ShiftIndex);
|
|
SDValue LoadTarget = DAG.getLoad(MVT::i32, dl, Chain, JTAddress,
|
|
MachinePointerInfo(), false, false, false,
|
|
0);
|
|
return DAG.getNode(HexagonISD::BR_JT, dl, MVT::Other, Chain, LoadTarget);
|
|
}
|
|
|
|
|
|
SDValue
|
|
HexagonTargetLowering::LowerDYNAMIC_STACKALLOC(SDValue Op,
|
|
SelectionDAG &DAG) const {
|
|
SDValue Chain = Op.getOperand(0);
|
|
SDValue Size = Op.getOperand(1);
|
|
SDValue Align = Op.getOperand(2);
|
|
SDLoc dl(Op);
|
|
|
|
ConstantSDNode *AlignConst = dyn_cast<ConstantSDNode>(Align);
|
|
assert(AlignConst && "Non-constant Align in LowerDYNAMIC_STACKALLOC");
|
|
|
|
unsigned A = AlignConst->getSExtValue();
|
|
auto &HFI = *Subtarget.getFrameLowering();
|
|
// "Zero" means natural stack alignment.
|
|
if (A == 0)
|
|
A = HFI.getStackAlignment();
|
|
|
|
DEBUG({
|
|
dbgs () << LLVM_FUNCTION_NAME << " Align: " << A << " Size: ";
|
|
Size.getNode()->dump(&DAG);
|
|
dbgs() << "\n";
|
|
});
|
|
|
|
SDValue AC = DAG.getConstant(A, dl, MVT::i32);
|
|
SDVTList VTs = DAG.getVTList(MVT::i32, MVT::Other);
|
|
return DAG.getNode(HexagonISD::ALLOCA, dl, VTs, Chain, Size, AC);
|
|
}
|
|
|
|
SDValue
|
|
HexagonTargetLowering::LowerFormalArguments(SDValue Chain,
|
|
CallingConv::ID CallConv,
|
|
bool isVarArg,
|
|
const
|
|
SmallVectorImpl<ISD::InputArg> &Ins,
|
|
SDLoc dl, SelectionDAG &DAG,
|
|
SmallVectorImpl<SDValue> &InVals)
|
|
const {
|
|
|
|
MachineFunction &MF = DAG.getMachineFunction();
|
|
MachineFrameInfo *MFI = MF.getFrameInfo();
|
|
MachineRegisterInfo &RegInfo = MF.getRegInfo();
|
|
auto &FuncInfo = *MF.getInfo<HexagonMachineFunctionInfo>();
|
|
|
|
// Assign locations to all of the incoming arguments.
|
|
SmallVector<CCValAssign, 16> ArgLocs;
|
|
CCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(), ArgLocs,
|
|
*DAG.getContext());
|
|
|
|
CCInfo.AnalyzeFormalArguments(Ins, CC_Hexagon);
|
|
|
|
// For LLVM, in the case when returning a struct by value (>8byte),
|
|
// the first argument is a pointer that points to the location on caller's
|
|
// stack where the return value will be stored. For Hexagon, the location on
|
|
// caller's stack is passed only when the struct size is smaller than (and
|
|
// equal to) 8 bytes. If not, no address will be passed into callee and
|
|
// callee return the result direclty through R0/R1.
|
|
|
|
SmallVector<SDValue, 4> MemOps;
|
|
|
|
for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
|
|
CCValAssign &VA = ArgLocs[i];
|
|
ISD::ArgFlagsTy Flags = Ins[i].Flags;
|
|
unsigned ObjSize;
|
|
unsigned StackLocation;
|
|
int FI;
|
|
|
|
if ( (VA.isRegLoc() && !Flags.isByVal())
|
|
|| (VA.isRegLoc() && Flags.isByVal() && Flags.getByValSize() > 8)) {
|
|
// Arguments passed in registers
|
|
// 1. int, long long, ptr args that get allocated in register.
|
|
// 2. Large struct that gets an register to put its address in.
|
|
EVT RegVT = VA.getLocVT();
|
|
if (RegVT == MVT::i8 || RegVT == MVT::i16 ||
|
|
RegVT == MVT::i32 || RegVT == MVT::f32) {
|
|
unsigned VReg =
|
|
RegInfo.createVirtualRegister(&Hexagon::IntRegsRegClass);
|
|
RegInfo.addLiveIn(VA.getLocReg(), VReg);
|
|
InVals.push_back(DAG.getCopyFromReg(Chain, dl, VReg, RegVT));
|
|
} else if (RegVT == MVT::i64 || RegVT == MVT::f64) {
|
|
unsigned VReg =
|
|
RegInfo.createVirtualRegister(&Hexagon::DoubleRegsRegClass);
|
|
RegInfo.addLiveIn(VA.getLocReg(), VReg);
|
|
InVals.push_back(DAG.getCopyFromReg(Chain, dl, VReg, RegVT));
|
|
} else {
|
|
assert (0);
|
|
}
|
|
} else if (VA.isRegLoc() && Flags.isByVal() && Flags.getByValSize() <= 8) {
|
|
assert (0 && "ByValSize must be bigger than 8 bytes");
|
|
} else {
|
|
// Sanity check.
|
|
assert(VA.isMemLoc());
|
|
|
|
if (Flags.isByVal()) {
|
|
// If it's a byval parameter, then we need to compute the
|
|
// "real" size, not the size of the pointer.
|
|
ObjSize = Flags.getByValSize();
|
|
} else {
|
|
ObjSize = VA.getLocVT().getStoreSizeInBits() >> 3;
|
|
}
|
|
|
|
StackLocation = HEXAGON_LRFP_SIZE + VA.getLocMemOffset();
|
|
// Create the frame index object for this incoming parameter...
|
|
FI = MFI->CreateFixedObject(ObjSize, StackLocation, true);
|
|
|
|
// Create the SelectionDAG nodes cordl, responding to a load
|
|
// from this parameter.
|
|
SDValue FIN = DAG.getFrameIndex(FI, MVT::i32);
|
|
|
|
if (Flags.isByVal()) {
|
|
// If it's a pass-by-value aggregate, then do not dereference the stack
|
|
// location. Instead, we should generate a reference to the stack
|
|
// location.
|
|
InVals.push_back(FIN);
|
|
} else {
|
|
InVals.push_back(DAG.getLoad(VA.getLocVT(), dl, Chain, FIN,
|
|
MachinePointerInfo(), false, false,
|
|
false, 0));
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!MemOps.empty())
|
|
Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, MemOps);
|
|
|
|
if (isVarArg) {
|
|
// This will point to the next argument passed via stack.
|
|
int FrameIndex = MFI->CreateFixedObject(Hexagon_PointerSize,
|
|
HEXAGON_LRFP_SIZE +
|
|
CCInfo.getNextStackOffset(),
|
|
true);
|
|
FuncInfo.setVarArgsFrameIndex(FrameIndex);
|
|
}
|
|
|
|
return Chain;
|
|
}
|
|
|
|
SDValue
|
|
HexagonTargetLowering::LowerVASTART(SDValue Op, SelectionDAG &DAG) const {
|
|
// VASTART stores the address of the VarArgsFrameIndex slot into the
|
|
// memory location argument.
|
|
MachineFunction &MF = DAG.getMachineFunction();
|
|
HexagonMachineFunctionInfo *QFI = MF.getInfo<HexagonMachineFunctionInfo>();
|
|
SDValue Addr = DAG.getFrameIndex(QFI->getVarArgsFrameIndex(), MVT::i32);
|
|
const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();
|
|
return DAG.getStore(Op.getOperand(0), SDLoc(Op), Addr,
|
|
Op.getOperand(1), MachinePointerInfo(SV), false,
|
|
false, 0);
|
|
}
|
|
|
|
// Creates a SPLAT instruction for a constant value VAL.
|
|
static SDValue createSplat(SelectionDAG &DAG, SDLoc dl, EVT VT, SDValue Val) {
|
|
if (VT.getSimpleVT() == MVT::v4i8)
|
|
return DAG.getNode(HexagonISD::VSPLATB, dl, VT, Val);
|
|
|
|
if (VT.getSimpleVT() == MVT::v4i16)
|
|
return DAG.getNode(HexagonISD::VSPLATH, dl, VT, Val);
|
|
|
|
return SDValue();
|
|
}
|
|
|
|
static bool isSExtFree(SDValue N) {
|
|
// A sign-extend of a truncate of a sign-extend is free.
|
|
if (N.getOpcode() == ISD::TRUNCATE &&
|
|
N.getOperand(0).getOpcode() == ISD::AssertSext)
|
|
return true;
|
|
// We have sign-extended loads.
|
|
if (N.getOpcode() == ISD::LOAD)
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
SDValue HexagonTargetLowering::LowerCTPOP(SDValue Op, SelectionDAG &DAG) const {
|
|
SDLoc dl(Op);
|
|
SDValue InpVal = Op.getOperand(0);
|
|
if (isa<ConstantSDNode>(InpVal)) {
|
|
uint64_t V = cast<ConstantSDNode>(InpVal)->getZExtValue();
|
|
return DAG.getTargetConstant(countPopulation(V), dl, MVT::i64);
|
|
}
|
|
SDValue PopOut = DAG.getNode(HexagonISD::POPCOUNT, dl, MVT::i32, InpVal);
|
|
return DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i64, PopOut);
|
|
}
|
|
|
|
SDValue HexagonTargetLowering::LowerSETCC(SDValue Op, SelectionDAG &DAG) const {
|
|
SDLoc dl(Op);
|
|
|
|
SDValue LHS = Op.getOperand(0);
|
|
SDValue RHS = Op.getOperand(1);
|
|
SDValue Cmp = Op.getOperand(2);
|
|
ISD::CondCode CC = cast<CondCodeSDNode>(Cmp)->get();
|
|
|
|
EVT VT = Op.getValueType();
|
|
EVT LHSVT = LHS.getValueType();
|
|
EVT RHSVT = RHS.getValueType();
|
|
|
|
if (LHSVT == MVT::v2i16) {
|
|
assert(ISD::isSignedIntSetCC(CC) || ISD::isUnsignedIntSetCC(CC));
|
|
unsigned ExtOpc = ISD::isSignedIntSetCC(CC) ? ISD::SIGN_EXTEND
|
|
: ISD::ZERO_EXTEND;
|
|
SDValue LX = DAG.getNode(ExtOpc, dl, MVT::v2i32, LHS);
|
|
SDValue RX = DAG.getNode(ExtOpc, dl, MVT::v2i32, RHS);
|
|
SDValue SC = DAG.getNode(ISD::SETCC, dl, MVT::v2i1, LX, RX, Cmp);
|
|
return SC;
|
|
}
|
|
|
|
// Treat all other vector types as legal.
|
|
if (VT.isVector())
|
|
return Op;
|
|
|
|
// Equals and not equals should use sign-extend, not zero-extend, since
|
|
// we can represent small negative values in the compare instructions.
|
|
// The LLVM default is to use zero-extend arbitrarily in these cases.
|
|
if ((CC == ISD::SETEQ || CC == ISD::SETNE) &&
|
|
(RHSVT == MVT::i8 || RHSVT == MVT::i16) &&
|
|
(LHSVT == MVT::i8 || LHSVT == MVT::i16)) {
|
|
ConstantSDNode *C = dyn_cast<ConstantSDNode>(RHS);
|
|
if (C && C->getAPIntValue().isNegative()) {
|
|
LHS = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::i32, LHS);
|
|
RHS = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::i32, RHS);
|
|
return DAG.getNode(ISD::SETCC, dl, Op.getValueType(),
|
|
LHS, RHS, Op.getOperand(2));
|
|
}
|
|
if (isSExtFree(LHS) || isSExtFree(RHS)) {
|
|
LHS = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::i32, LHS);
|
|
RHS = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::i32, RHS);
|
|
return DAG.getNode(ISD::SETCC, dl, Op.getValueType(),
|
|
LHS, RHS, Op.getOperand(2));
|
|
}
|
|
}
|
|
return SDValue();
|
|
}
|
|
|
|
SDValue HexagonTargetLowering::LowerVSELECT(SDValue Op, SelectionDAG &DAG)
|
|
const {
|
|
SDValue PredOp = Op.getOperand(0);
|
|
SDValue Op1 = Op.getOperand(1), Op2 = Op.getOperand(2);
|
|
EVT OpVT = Op1.getValueType();
|
|
SDLoc DL(Op);
|
|
|
|
if (OpVT == MVT::v2i16) {
|
|
SDValue X1 = DAG.getNode(ISD::ZERO_EXTEND, DL, MVT::v2i32, Op1);
|
|
SDValue X2 = DAG.getNode(ISD::ZERO_EXTEND, DL, MVT::v2i32, Op2);
|
|
SDValue SL = DAG.getNode(ISD::VSELECT, DL, MVT::v2i32, PredOp, X1, X2);
|
|
SDValue TR = DAG.getNode(ISD::TRUNCATE, DL, MVT::v2i16, SL);
|
|
return TR;
|
|
}
|
|
|
|
return SDValue();
|
|
}
|
|
|
|
// Handle only specific vector loads.
|
|
SDValue HexagonTargetLowering::LowerLOAD(SDValue Op, SelectionDAG &DAG) const {
|
|
EVT VT = Op.getValueType();
|
|
SDLoc DL(Op);
|
|
LoadSDNode *LoadNode = cast<LoadSDNode>(Op);
|
|
SDValue Chain = LoadNode->getChain();
|
|
SDValue Ptr = Op.getOperand(1);
|
|
SDValue LoweredLoad;
|
|
SDValue Result;
|
|
SDValue Base = LoadNode->getBasePtr();
|
|
ISD::LoadExtType Ext = LoadNode->getExtensionType();
|
|
unsigned Alignment = LoadNode->getAlignment();
|
|
SDValue LoadChain;
|
|
|
|
if(Ext == ISD::NON_EXTLOAD)
|
|
Ext = ISD::ZEXTLOAD;
|
|
|
|
if (VT == MVT::v4i16) {
|
|
if (Alignment == 2) {
|
|
SDValue Loads[4];
|
|
// Base load.
|
|
Loads[0] = DAG.getExtLoad(Ext, DL, MVT::i32, Chain, Base,
|
|
LoadNode->getPointerInfo(), MVT::i16,
|
|
LoadNode->isVolatile(),
|
|
LoadNode->isNonTemporal(),
|
|
LoadNode->isInvariant(),
|
|
Alignment);
|
|
// Base+2 load.
|
|
SDValue Increment = DAG.getConstant(2, DL, MVT::i32);
|
|
Ptr = DAG.getNode(ISD::ADD, DL, Base.getValueType(), Base, Increment);
|
|
Loads[1] = DAG.getExtLoad(Ext, DL, MVT::i32, Chain, Ptr,
|
|
LoadNode->getPointerInfo(), MVT::i16,
|
|
LoadNode->isVolatile(),
|
|
LoadNode->isNonTemporal(),
|
|
LoadNode->isInvariant(),
|
|
Alignment);
|
|
// SHL 16, then OR base and base+2.
|
|
SDValue ShiftAmount = DAG.getConstant(16, DL, MVT::i32);
|
|
SDValue Tmp1 = DAG.getNode(ISD::SHL, DL, MVT::i32, Loads[1], ShiftAmount);
|
|
SDValue Tmp2 = DAG.getNode(ISD::OR, DL, MVT::i32, Tmp1, Loads[0]);
|
|
// Base + 4.
|
|
Increment = DAG.getConstant(4, DL, MVT::i32);
|
|
Ptr = DAG.getNode(ISD::ADD, DL, Base.getValueType(), Base, Increment);
|
|
Loads[2] = DAG.getExtLoad(Ext, DL, MVT::i32, Chain, Ptr,
|
|
LoadNode->getPointerInfo(), MVT::i16,
|
|
LoadNode->isVolatile(),
|
|
LoadNode->isNonTemporal(),
|
|
LoadNode->isInvariant(),
|
|
Alignment);
|
|
// Base + 6.
|
|
Increment = DAG.getConstant(6, DL, MVT::i32);
|
|
Ptr = DAG.getNode(ISD::ADD, DL, Base.getValueType(), Base, Increment);
|
|
Loads[3] = DAG.getExtLoad(Ext, DL, MVT::i32, Chain, Ptr,
|
|
LoadNode->getPointerInfo(), MVT::i16,
|
|
LoadNode->isVolatile(),
|
|
LoadNode->isNonTemporal(),
|
|
LoadNode->isInvariant(),
|
|
Alignment);
|
|
// SHL 16, then OR base+4 and base+6.
|
|
Tmp1 = DAG.getNode(ISD::SHL, DL, MVT::i32, Loads[3], ShiftAmount);
|
|
SDValue Tmp4 = DAG.getNode(ISD::OR, DL, MVT::i32, Tmp1, Loads[2]);
|
|
// Combine to i64. This could be optimised out later if we can
|
|
// affect reg allocation of this code.
|
|
Result = DAG.getNode(HexagonISD::COMBINE, DL, MVT::i64, Tmp4, Tmp2);
|
|
LoadChain = DAG.getNode(ISD::TokenFactor, DL, MVT::Other,
|
|
Loads[0].getValue(1), Loads[1].getValue(1),
|
|
Loads[2].getValue(1), Loads[3].getValue(1));
|
|
} else {
|
|
// Perform default type expansion.
|
|
Result = DAG.getLoad(MVT::i64, DL, Chain, Ptr, LoadNode->getPointerInfo(),
|
|
LoadNode->isVolatile(), LoadNode->isNonTemporal(),
|
|
LoadNode->isInvariant(), LoadNode->getAlignment());
|
|
LoadChain = Result.getValue(1);
|
|
}
|
|
} else
|
|
llvm_unreachable("Custom lowering unsupported load");
|
|
|
|
Result = DAG.getNode(ISD::BITCAST, DL, VT, Result);
|
|
// Since we pretend to lower a load, we need the original chain
|
|
// info attached to the result.
|
|
SDValue Ops[] = { Result, LoadChain };
|
|
|
|
return DAG.getMergeValues(Ops, DL);
|
|
}
|
|
|
|
|
|
SDValue
|
|
HexagonTargetLowering::LowerConstantPool(SDValue Op, SelectionDAG &DAG) const {
|
|
EVT ValTy = Op.getValueType();
|
|
SDLoc dl(Op);
|
|
ConstantPoolSDNode *CP = cast<ConstantPoolSDNode>(Op);
|
|
SDValue Res;
|
|
if (CP->isMachineConstantPoolEntry())
|
|
Res = DAG.getTargetConstantPool(CP->getMachineCPVal(), ValTy,
|
|
CP->getAlignment());
|
|
else
|
|
Res = DAG.getTargetConstantPool(CP->getConstVal(), ValTy,
|
|
CP->getAlignment());
|
|
return DAG.getNode(HexagonISD::CP, dl, ValTy, Res);
|
|
}
|
|
|
|
SDValue
|
|
HexagonTargetLowering::LowerRETURNADDR(SDValue Op, SelectionDAG &DAG) const {
|
|
const HexagonRegisterInfo &HRI = *Subtarget.getRegisterInfo();
|
|
MachineFunction &MF = DAG.getMachineFunction();
|
|
MachineFrameInfo &MFI = *MF.getFrameInfo();
|
|
MFI.setReturnAddressIsTaken(true);
|
|
|
|
if (verifyReturnAddressArgumentIsConstant(Op, DAG))
|
|
return SDValue();
|
|
|
|
EVT VT = Op.getValueType();
|
|
SDLoc dl(Op);
|
|
unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
|
|
if (Depth) {
|
|
SDValue FrameAddr = LowerFRAMEADDR(Op, DAG);
|
|
SDValue Offset = DAG.getConstant(4, dl, MVT::i32);
|
|
return DAG.getLoad(VT, dl, DAG.getEntryNode(),
|
|
DAG.getNode(ISD::ADD, dl, VT, FrameAddr, Offset),
|
|
MachinePointerInfo(), false, false, false, 0);
|
|
}
|
|
|
|
// Return LR, which contains the return address. Mark it an implicit live-in.
|
|
unsigned Reg = MF.addLiveIn(HRI.getRARegister(), getRegClassFor(MVT::i32));
|
|
return DAG.getCopyFromReg(DAG.getEntryNode(), dl, Reg, VT);
|
|
}
|
|
|
|
SDValue
|
|
HexagonTargetLowering::LowerFRAMEADDR(SDValue Op, SelectionDAG &DAG) const {
|
|
const HexagonRegisterInfo &HRI = *Subtarget.getRegisterInfo();
|
|
MachineFrameInfo &MFI = *DAG.getMachineFunction().getFrameInfo();
|
|
MFI.setFrameAddressIsTaken(true);
|
|
|
|
EVT VT = Op.getValueType();
|
|
SDLoc dl(Op);
|
|
unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
|
|
SDValue FrameAddr = DAG.getCopyFromReg(DAG.getEntryNode(), dl,
|
|
HRI.getFrameRegister(), VT);
|
|
while (Depth--)
|
|
FrameAddr = DAG.getLoad(VT, dl, DAG.getEntryNode(), FrameAddr,
|
|
MachinePointerInfo(),
|
|
false, false, false, 0);
|
|
return FrameAddr;
|
|
}
|
|
|
|
SDValue HexagonTargetLowering::LowerATOMIC_FENCE(SDValue Op,
|
|
SelectionDAG& DAG) const {
|
|
SDLoc dl(Op);
|
|
return DAG.getNode(HexagonISD::BARRIER, dl, MVT::Other, Op.getOperand(0));
|
|
}
|
|
|
|
|
|
SDValue HexagonTargetLowering::LowerGLOBALADDRESS(SDValue Op,
|
|
SelectionDAG &DAG) const {
|
|
SDValue Result;
|
|
const GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
|
|
int64_t Offset = cast<GlobalAddressSDNode>(Op)->getOffset();
|
|
SDLoc dl(Op);
|
|
auto PtrVT = getPointerTy(DAG.getDataLayout());
|
|
Result = DAG.getTargetGlobalAddress(GV, dl, PtrVT, Offset);
|
|
|
|
const HexagonTargetObjectFile *TLOF =
|
|
static_cast<const HexagonTargetObjectFile *>(
|
|
getTargetMachine().getObjFileLowering());
|
|
if (TLOF->IsGlobalInSmallSection(GV, getTargetMachine())) {
|
|
return DAG.getNode(HexagonISD::CONST32_GP, dl, PtrVT, Result);
|
|
}
|
|
|
|
return DAG.getNode(HexagonISD::CONST32, dl, PtrVT, Result);
|
|
}
|
|
|
|
// Specifies that for loads and stores VT can be promoted to PromotedLdStVT.
|
|
void HexagonTargetLowering::promoteLdStType(EVT VT, EVT PromotedLdStVT) {
|
|
if (VT != PromotedLdStVT) {
|
|
setOperationAction(ISD::LOAD, VT.getSimpleVT(), Promote);
|
|
AddPromotedToType(ISD::LOAD, VT.getSimpleVT(),
|
|
PromotedLdStVT.getSimpleVT());
|
|
|
|
setOperationAction(ISD::STORE, VT.getSimpleVT(), Promote);
|
|
AddPromotedToType(ISD::STORE, VT.getSimpleVT(),
|
|
PromotedLdStVT.getSimpleVT());
|
|
}
|
|
}
|
|
|
|
SDValue
|
|
HexagonTargetLowering::LowerBlockAddress(SDValue Op, SelectionDAG &DAG) const {
|
|
const BlockAddress *BA = cast<BlockAddressSDNode>(Op)->getBlockAddress();
|
|
SDValue BA_SD = DAG.getTargetBlockAddress(BA, MVT::i32);
|
|
SDLoc dl(Op);
|
|
return DAG.getNode(HexagonISD::CONST32_GP, dl,
|
|
getPointerTy(DAG.getDataLayout()), BA_SD);
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// TargetLowering Implementation
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
HexagonTargetLowering::HexagonTargetLowering(const TargetMachine &TM,
|
|
const HexagonSubtarget &STI)
|
|
: TargetLowering(TM), HTM(static_cast<const HexagonTargetMachine&>(TM)),
|
|
Subtarget(STI) {
|
|
bool IsV4 = !Subtarget.hasV5TOps();
|
|
auto &HRI = *Subtarget.getRegisterInfo();
|
|
|
|
setPrefLoopAlignment(4);
|
|
setPrefFunctionAlignment(4);
|
|
setMinFunctionAlignment(2);
|
|
setInsertFencesForAtomic(false);
|
|
setExceptionPointerRegister(Hexagon::R0);
|
|
setExceptionSelectorRegister(Hexagon::R1);
|
|
setStackPointerRegisterToSaveRestore(HRI.getStackRegister());
|
|
|
|
if (EnableHexSDNodeSched)
|
|
setSchedulingPreference(Sched::VLIW);
|
|
else
|
|
setSchedulingPreference(Sched::Source);
|
|
|
|
// Limits for inline expansion of memcpy/memmove
|
|
MaxStoresPerMemcpy = MaxStoresPerMemcpyCL;
|
|
MaxStoresPerMemcpyOptSize = MaxStoresPerMemcpyOptSizeCL;
|
|
MaxStoresPerMemmove = MaxStoresPerMemmoveCL;
|
|
MaxStoresPerMemmoveOptSize = MaxStoresPerMemmoveOptSizeCL;
|
|
MaxStoresPerMemset = MaxStoresPerMemsetCL;
|
|
MaxStoresPerMemsetOptSize = MaxStoresPerMemsetOptSizeCL;
|
|
|
|
//
|
|
// Set up register classes.
|
|
//
|
|
|
|
addRegisterClass(MVT::i1, &Hexagon::PredRegsRegClass);
|
|
addRegisterClass(MVT::v2i1, &Hexagon::PredRegsRegClass); // bbbbaaaa
|
|
addRegisterClass(MVT::v4i1, &Hexagon::PredRegsRegClass); // ddccbbaa
|
|
addRegisterClass(MVT::v8i1, &Hexagon::PredRegsRegClass); // hgfedcba
|
|
addRegisterClass(MVT::i32, &Hexagon::IntRegsRegClass);
|
|
addRegisterClass(MVT::v4i8, &Hexagon::IntRegsRegClass);
|
|
addRegisterClass(MVT::v2i16, &Hexagon::IntRegsRegClass);
|
|
addRegisterClass(MVT::i64, &Hexagon::DoubleRegsRegClass);
|
|
addRegisterClass(MVT::v8i8, &Hexagon::DoubleRegsRegClass);
|
|
addRegisterClass(MVT::v4i16, &Hexagon::DoubleRegsRegClass);
|
|
addRegisterClass(MVT::v2i32, &Hexagon::DoubleRegsRegClass);
|
|
|
|
if (Subtarget.hasV5TOps()) {
|
|
addRegisterClass(MVT::f32, &Hexagon::IntRegsRegClass);
|
|
addRegisterClass(MVT::f64, &Hexagon::DoubleRegsRegClass);
|
|
}
|
|
|
|
//
|
|
// Handling of scalar operations.
|
|
//
|
|
// All operations default to "legal", except:
|
|
// - indexed loads and stores (pre-/post-incremented),
|
|
// - ANY_EXTEND_VECTOR_INREG, ATOMIC_CMP_SWAP_WITH_SUCCESS, CONCAT_VECTORS,
|
|
// ConstantFP, DEBUGTRAP, FCEIL, FCOPYSIGN, FEXP, FEXP2, FFLOOR, FGETSIGN,
|
|
// FLOG, FLOG2, FLOG10, FMAXNUM, FMINNUM, FNEARBYINT, FRINT, FROUND, TRAP,
|
|
// FTRUNC, PREFETCH, SIGN_EXTEND_VECTOR_INREG, ZERO_EXTEND_VECTOR_INREG,
|
|
// which default to "expand" for at least one type.
|
|
|
|
// Misc operations.
|
|
setOperationAction(ISD::ConstantFP, MVT::f32, Legal); // Default: expand
|
|
setOperationAction(ISD::ConstantFP, MVT::f64, Legal); // Default: expand
|
|
|
|
setOperationAction(ISD::ConstantPool, MVT::i32, Custom);
|
|
setOperationAction(ISD::BUILD_PAIR, MVT::i64, Expand);
|
|
setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i1, Expand);
|
|
setOperationAction(ISD::INLINEASM, MVT::Other, Custom);
|
|
setOperationAction(ISD::EH_RETURN, MVT::Other, Custom);
|
|
setOperationAction(ISD::ATOMIC_FENCE, MVT::Other, Custom);
|
|
|
|
// Custom legalize GlobalAddress nodes into CONST32.
|
|
setOperationAction(ISD::GlobalAddress, MVT::i32, Custom);
|
|
setOperationAction(ISD::GlobalAddress, MVT::i8, Custom);
|
|
setOperationAction(ISD::BlockAddress, MVT::i32, Custom);
|
|
|
|
// Hexagon needs to optimize cases with negative constants.
|
|
setOperationAction(ISD::SETCC, MVT::i8, Custom);
|
|
setOperationAction(ISD::SETCC, MVT::i16, Custom);
|
|
|
|
// VASTART needs to be custom lowered to use the VarArgsFrameIndex.
|
|
setOperationAction(ISD::VASTART, MVT::Other, Custom);
|
|
setOperationAction(ISD::VAEND, MVT::Other, Expand);
|
|
setOperationAction(ISD::VAARG, MVT::Other, Expand);
|
|
|
|
setOperationAction(ISD::STACKSAVE, MVT::Other, Expand);
|
|
setOperationAction(ISD::STACKRESTORE, MVT::Other, Expand);
|
|
setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i32, Custom);
|
|
|
|
if (EmitJumpTables)
|
|
setOperationAction(ISD::BR_JT, MVT::Other, Custom);
|
|
else
|
|
setOperationAction(ISD::BR_JT, MVT::Other, Expand);
|
|
// Increase jump tables cutover to 5, was 4.
|
|
setMinimumJumpTableEntries(MinimumJumpTables);
|
|
|
|
// Hexagon has instructions for add/sub with carry. The problem with
|
|
// modeling these instructions is that they produce 2 results: Rdd and Px.
|
|
// To model the update of Px, we will have to use Defs[p0..p3] which will
|
|
// cause any predicate live range to spill. So, we pretend we dont't have
|
|
// these instructions.
|
|
setOperationAction(ISD::ADDE, MVT::i8, Expand);
|
|
setOperationAction(ISD::ADDE, MVT::i16, Expand);
|
|
setOperationAction(ISD::ADDE, MVT::i32, Expand);
|
|
setOperationAction(ISD::ADDE, MVT::i64, Expand);
|
|
setOperationAction(ISD::SUBE, MVT::i8, Expand);
|
|
setOperationAction(ISD::SUBE, MVT::i16, Expand);
|
|
setOperationAction(ISD::SUBE, MVT::i32, Expand);
|
|
setOperationAction(ISD::SUBE, MVT::i64, Expand);
|
|
setOperationAction(ISD::ADDC, MVT::i8, Expand);
|
|
setOperationAction(ISD::ADDC, MVT::i16, Expand);
|
|
setOperationAction(ISD::ADDC, MVT::i32, Expand);
|
|
setOperationAction(ISD::ADDC, MVT::i64, Expand);
|
|
setOperationAction(ISD::SUBC, MVT::i8, Expand);
|
|
setOperationAction(ISD::SUBC, MVT::i16, Expand);
|
|
setOperationAction(ISD::SUBC, MVT::i32, Expand);
|
|
setOperationAction(ISD::SUBC, MVT::i64, Expand);
|
|
|
|
// Only add and sub that detect overflow are the saturating ones.
|
|
for (MVT VT : MVT::integer_valuetypes()) {
|
|
setOperationAction(ISD::UADDO, VT, Expand);
|
|
setOperationAction(ISD::SADDO, VT, Expand);
|
|
setOperationAction(ISD::USUBO, VT, Expand);
|
|
setOperationAction(ISD::SSUBO, VT, Expand);
|
|
}
|
|
|
|
setOperationAction(ISD::CTLZ, MVT::i8, Promote);
|
|
setOperationAction(ISD::CTLZ, MVT::i16, Promote);
|
|
setOperationAction(ISD::CTTZ, MVT::i8, Promote);
|
|
setOperationAction(ISD::CTTZ, MVT::i16, Promote);
|
|
setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i8, Promote);
|
|
setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i16, Promote);
|
|
setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::i8, Promote);
|
|
setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::i16, Promote);
|
|
|
|
// In V5, popcount can count # of 1s in i64 but returns i32.
|
|
// On V4 it will be expanded (set later).
|
|
setOperationAction(ISD::CTPOP, MVT::i8, Promote);
|
|
setOperationAction(ISD::CTPOP, MVT::i16, Promote);
|
|
setOperationAction(ISD::CTPOP, MVT::i32, Promote);
|
|
setOperationAction(ISD::CTPOP, MVT::i64, Custom);
|
|
|
|
// We custom lower i64 to i64 mul, so that it is not considered as a legal
|
|
// operation. There is a pattern that will match i64 mul and transform it
|
|
// to a series of instructions.
|
|
setOperationAction(ISD::MUL, MVT::i64, Expand);
|
|
setOperationAction(ISD::MULHS, MVT::i64, Expand);
|
|
|
|
for (unsigned IntExpOp :
|
|
{ISD::SDIV, ISD::UDIV, ISD::SREM, ISD::UREM, ISD::SDIVREM, ISD::UDIVREM,
|
|
ISD::ROTL, ISD::ROTR, ISD::BSWAP, ISD::SHL_PARTS, ISD::SRA_PARTS,
|
|
ISD::SRL_PARTS, ISD::SMUL_LOHI, ISD::UMUL_LOHI}) {
|
|
setOperationAction(IntExpOp, MVT::i32, Expand);
|
|
setOperationAction(IntExpOp, MVT::i64, Expand);
|
|
}
|
|
|
|
for (unsigned FPExpOp :
|
|
{ISD::FDIV, ISD::FREM, ISD::FSQRT, ISD::FSIN, ISD::FCOS, ISD::FSINCOS,
|
|
ISD::FPOW, ISD::FCOPYSIGN}) {
|
|
setOperationAction(FPExpOp, MVT::f32, Expand);
|
|
setOperationAction(FPExpOp, MVT::f64, Expand);
|
|
}
|
|
|
|
// No extending loads from i32.
|
|
for (MVT VT : MVT::integer_valuetypes()) {
|
|
setLoadExtAction(ISD::ZEXTLOAD, VT, MVT::i32, Expand);
|
|
setLoadExtAction(ISD::SEXTLOAD, VT, MVT::i32, Expand);
|
|
setLoadExtAction(ISD::EXTLOAD, VT, MVT::i32, Expand);
|
|
}
|
|
// Turn FP truncstore into trunc + store.
|
|
setTruncStoreAction(MVT::f64, MVT::f32, Expand);
|
|
// Turn FP extload into load/fextend.
|
|
for (MVT VT : MVT::fp_valuetypes())
|
|
setLoadExtAction(ISD::EXTLOAD, VT, MVT::f32, Expand);
|
|
|
|
// Expand BR_CC and SELECT_CC for all integer and fp types.
|
|
for (MVT VT : MVT::integer_valuetypes()) {
|
|
setOperationAction(ISD::BR_CC, VT, Expand);
|
|
setOperationAction(ISD::SELECT_CC, VT, Expand);
|
|
}
|
|
for (MVT VT : MVT::fp_valuetypes()) {
|
|
setOperationAction(ISD::BR_CC, VT, Expand);
|
|
setOperationAction(ISD::SELECT_CC, VT, Expand);
|
|
}
|
|
setOperationAction(ISD::BR_CC, MVT::Other, Expand);
|
|
|
|
//
|
|
// Handling of vector operations.
|
|
//
|
|
|
|
// Custom lower v4i16 load only. Let v4i16 store to be
|
|
// promoted for now.
|
|
promoteLdStType(MVT::v4i8, MVT::i32);
|
|
promoteLdStType(MVT::v2i16, MVT::i32);
|
|
promoteLdStType(MVT::v8i8, MVT::i64);
|
|
promoteLdStType(MVT::v2i32, MVT::i64);
|
|
|
|
setOperationAction(ISD::LOAD, MVT::v4i16, Custom);
|
|
setOperationAction(ISD::STORE, MVT::v4i16, Promote);
|
|
AddPromotedToType(ISD::LOAD, MVT::v4i16, MVT::i64);
|
|
AddPromotedToType(ISD::STORE, MVT::v4i16, MVT::i64);
|
|
|
|
// Set the action for vector operations to "expand", then override it with
|
|
// either "custom" or "legal" for specific cases.
|
|
static unsigned VectExpOps[] = {
|
|
// Integer arithmetic:
|
|
ISD::ADD, ISD::SUB, ISD::MUL, ISD::SDIV, ISD::UDIV,
|
|
ISD::SREM, ISD::UREM, ISD::SDIVREM, ISD::UDIVREM, ISD::ADDC,
|
|
ISD::SUBC, ISD::SADDO, ISD::UADDO, ISD::SSUBO, ISD::USUBO,
|
|
ISD::SMUL_LOHI, ISD::UMUL_LOHI,
|
|
// Logical/bit:
|
|
ISD::AND, ISD::OR, ISD::XOR, ISD::ROTL, ISD::ROTR,
|
|
ISD::CTPOP, ISD::CTLZ, ISD::CTTZ, ISD::CTLZ_ZERO_UNDEF,
|
|
ISD::CTTZ_ZERO_UNDEF,
|
|
// Floating point arithmetic/math functions:
|
|
ISD::FADD, ISD::FSUB, ISD::FMUL, ISD::FMA, ISD::FDIV,
|
|
ISD::FREM, ISD::FNEG, ISD::FABS, ISD::FSQRT, ISD::FSIN,
|
|
ISD::FCOS, ISD::FPOWI, ISD::FPOW, ISD::FLOG, ISD::FLOG2,
|
|
ISD::FLOG10, ISD::FEXP, ISD::FEXP2, ISD::FCEIL, ISD::FTRUNC,
|
|
ISD::FRINT, ISD::FNEARBYINT, ISD::FROUND, ISD::FFLOOR,
|
|
ISD::FMINNUM, ISD::FMAXNUM, ISD::FSINCOS,
|
|
// Misc:
|
|
ISD::SELECT, ISD::ConstantPool,
|
|
// Vector:
|
|
ISD::BUILD_VECTOR, ISD::SCALAR_TO_VECTOR,
|
|
ISD::EXTRACT_VECTOR_ELT, ISD::INSERT_VECTOR_ELT,
|
|
ISD::EXTRACT_SUBVECTOR, ISD::INSERT_SUBVECTOR,
|
|
ISD::CONCAT_VECTORS, ISD::VECTOR_SHUFFLE
|
|
};
|
|
|
|
for (MVT VT : MVT::vector_valuetypes()) {
|
|
for (unsigned VectExpOp : VectExpOps)
|
|
setOperationAction(VectExpOp, VT, Expand);
|
|
|
|
// Expand all extended loads and truncating stores:
|
|
for (MVT TargetVT : MVT::vector_valuetypes()) {
|
|
setLoadExtAction(ISD::EXTLOAD, TargetVT, VT, Expand);
|
|
setTruncStoreAction(VT, TargetVT, Expand);
|
|
}
|
|
|
|
setOperationAction(ISD::SRA, VT, Custom);
|
|
setOperationAction(ISD::SHL, VT, Custom);
|
|
setOperationAction(ISD::SRL, VT, Custom);
|
|
}
|
|
|
|
// Types natively supported:
|
|
for (MVT NativeVT : {MVT::v2i1, MVT::v4i1, MVT::v8i1, MVT::v32i1, MVT::v64i1,
|
|
MVT::v4i8, MVT::v8i8, MVT::v2i16, MVT::v4i16, MVT::v1i32,
|
|
MVT::v2i32, MVT::v1i64}) {
|
|
setOperationAction(ISD::BUILD_VECTOR, NativeVT, Custom);
|
|
setOperationAction(ISD::EXTRACT_VECTOR_ELT, NativeVT, Custom);
|
|
setOperationAction(ISD::INSERT_VECTOR_ELT, NativeVT, Custom);
|
|
setOperationAction(ISD::EXTRACT_SUBVECTOR, NativeVT, Custom);
|
|
setOperationAction(ISD::INSERT_SUBVECTOR, NativeVT, Custom);
|
|
setOperationAction(ISD::CONCAT_VECTORS, NativeVT, Custom);
|
|
|
|
setOperationAction(ISD::ADD, NativeVT, Legal);
|
|
setOperationAction(ISD::SUB, NativeVT, Legal);
|
|
setOperationAction(ISD::MUL, NativeVT, Legal);
|
|
setOperationAction(ISD::AND, NativeVT, Legal);
|
|
setOperationAction(ISD::OR, NativeVT, Legal);
|
|
setOperationAction(ISD::XOR, NativeVT, Legal);
|
|
}
|
|
|
|
setOperationAction(ISD::SETCC, MVT::v2i16, Custom);
|
|
setOperationAction(ISD::VSELECT, MVT::v2i16, Custom);
|
|
setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v4i16, Custom);
|
|
setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v8i8, Custom);
|
|
|
|
// Subtarget-specific operation actions.
|
|
//
|
|
if (Subtarget.hasV5TOps()) {
|
|
setOperationAction(ISD::FMA, MVT::f64, Expand);
|
|
setOperationAction(ISD::FADD, MVT::f64, Expand);
|
|
setOperationAction(ISD::FSUB, MVT::f64, Expand);
|
|
setOperationAction(ISD::FMUL, MVT::f64, Expand);
|
|
|
|
setOperationAction(ISD::FP_TO_UINT, MVT::i1, Promote);
|
|
setOperationAction(ISD::FP_TO_UINT, MVT::i8, Promote);
|
|
setOperationAction(ISD::FP_TO_UINT, MVT::i16, Promote);
|
|
setOperationAction(ISD::FP_TO_SINT, MVT::i1, Promote);
|
|
setOperationAction(ISD::FP_TO_SINT, MVT::i8, Promote);
|
|
setOperationAction(ISD::FP_TO_SINT, MVT::i16, Promote);
|
|
setOperationAction(ISD::UINT_TO_FP, MVT::i1, Promote);
|
|
setOperationAction(ISD::UINT_TO_FP, MVT::i8, Promote);
|
|
setOperationAction(ISD::UINT_TO_FP, MVT::i16, Promote);
|
|
setOperationAction(ISD::SINT_TO_FP, MVT::i1, Promote);
|
|
setOperationAction(ISD::SINT_TO_FP, MVT::i8, Promote);
|
|
setOperationAction(ISD::SINT_TO_FP, MVT::i16, Promote);
|
|
|
|
} else { // V4
|
|
setOperationAction(ISD::SINT_TO_FP, MVT::i32, Expand);
|
|
setOperationAction(ISD::SINT_TO_FP, MVT::i64, Expand);
|
|
setOperationAction(ISD::UINT_TO_FP, MVT::i32, Expand);
|
|
setOperationAction(ISD::UINT_TO_FP, MVT::i64, Expand);
|
|
setOperationAction(ISD::FP_TO_SINT, MVT::f64, Expand);
|
|
setOperationAction(ISD::FP_TO_SINT, MVT::f32, Expand);
|
|
setOperationAction(ISD::FP_EXTEND, MVT::f32, Expand);
|
|
setOperationAction(ISD::FP_ROUND, MVT::f64, Expand);
|
|
setCondCodeAction(ISD::SETUNE, MVT::f64, Expand);
|
|
|
|
setOperationAction(ISD::CTPOP, MVT::i8, Expand);
|
|
setOperationAction(ISD::CTPOP, MVT::i16, Expand);
|
|
setOperationAction(ISD::CTPOP, MVT::i32, Expand);
|
|
setOperationAction(ISD::CTPOP, MVT::i64, Expand);
|
|
|
|
// Expand these operations for both f32 and f64:
|
|
for (unsigned FPExpOpV4 :
|
|
{ISD::FADD, ISD::FSUB, ISD::FMUL, ISD::FABS, ISD::FNEG, ISD::FMA}) {
|
|
setOperationAction(FPExpOpV4, MVT::f32, Expand);
|
|
setOperationAction(FPExpOpV4, MVT::f64, Expand);
|
|
}
|
|
|
|
for (ISD::CondCode FPExpCCV4 :
|
|
{ISD::SETOEQ, ISD::SETOGT, ISD::SETOLT, ISD::SETOGE, ISD::SETOLE,
|
|
ISD::SETUO, ISD::SETO}) {
|
|
setCondCodeAction(FPExpCCV4, MVT::f32, Expand);
|
|
setCondCodeAction(FPExpCCV4, MVT::f64, Expand);
|
|
}
|
|
}
|
|
|
|
// Handling of indexed loads/stores: default is "expand".
|
|
//
|
|
for (MVT LSXTy : {MVT::i8, MVT::i16, MVT::i32, MVT::i64}) {
|
|
setIndexedLoadAction(ISD::POST_INC, LSXTy, Legal);
|
|
setIndexedStoreAction(ISD::POST_INC, LSXTy, Legal);
|
|
}
|
|
|
|
computeRegisterProperties(&HRI);
|
|
|
|
//
|
|
// Library calls for unsupported operations
|
|
//
|
|
bool FastMath = EnableFastMath;
|
|
|
|
setLibcallName(RTLIB::SDIV_I32, "__hexagon_divsi3");
|
|
setLibcallName(RTLIB::SDIV_I64, "__hexagon_divdi3");
|
|
setLibcallName(RTLIB::UDIV_I32, "__hexagon_udivsi3");
|
|
setLibcallName(RTLIB::UDIV_I64, "__hexagon_udivdi3");
|
|
setLibcallName(RTLIB::SREM_I32, "__hexagon_modsi3");
|
|
setLibcallName(RTLIB::SREM_I64, "__hexagon_moddi3");
|
|
setLibcallName(RTLIB::UREM_I32, "__hexagon_umodsi3");
|
|
setLibcallName(RTLIB::UREM_I64, "__hexagon_umoddi3");
|
|
|
|
setLibcallName(RTLIB::SINTTOFP_I128_F64, "__hexagon_floattidf");
|
|
setLibcallName(RTLIB::SINTTOFP_I128_F32, "__hexagon_floattisf");
|
|
setLibcallName(RTLIB::FPTOUINT_F32_I128, "__hexagon_fixunssfti");
|
|
setLibcallName(RTLIB::FPTOUINT_F64_I128, "__hexagon_fixunsdfti");
|
|
setLibcallName(RTLIB::FPTOSINT_F32_I128, "__hexagon_fixsfti");
|
|
setLibcallName(RTLIB::FPTOSINT_F64_I128, "__hexagon_fixdfti");
|
|
|
|
if (IsV4) {
|
|
// Handle single-precision floating point operations on V4.
|
|
if (FastMath) {
|
|
setLibcallName(RTLIB::ADD_F32, "__hexagon_fast_addsf3");
|
|
setLibcallName(RTLIB::SUB_F32, "__hexagon_fast_subsf3");
|
|
setLibcallName(RTLIB::MUL_F32, "__hexagon_fast_mulsf3");
|
|
setLibcallName(RTLIB::OGT_F32, "__hexagon_fast_gtsf2");
|
|
setLibcallName(RTLIB::OLT_F32, "__hexagon_fast_ltsf2");
|
|
// Double-precision compares.
|
|
setLibcallName(RTLIB::OGT_F64, "__hexagon_fast_gtdf2");
|
|
setLibcallName(RTLIB::OLT_F64, "__hexagon_fast_ltdf2");
|
|
} else {
|
|
setLibcallName(RTLIB::ADD_F32, "__hexagon_addsf3");
|
|
setLibcallName(RTLIB::SUB_F32, "__hexagon_subsf3");
|
|
setLibcallName(RTLIB::MUL_F32, "__hexagon_mulsf3");
|
|
setLibcallName(RTLIB::OGT_F32, "__hexagon_gtsf2");
|
|
setLibcallName(RTLIB::OLT_F32, "__hexagon_ltsf2");
|
|
// Double-precision compares.
|
|
setLibcallName(RTLIB::OGT_F64, "__hexagon_gtdf2");
|
|
setLibcallName(RTLIB::OLT_F64, "__hexagon_ltdf2");
|
|
}
|
|
}
|
|
|
|
// This is the only fast library function for sqrtd.
|
|
if (FastMath)
|
|
setLibcallName(RTLIB::SQRT_F64, "__hexagon_fast2_sqrtdf2");
|
|
|
|
// Prefix is: nothing for "slow-math",
|
|
// "fast2_" for V4 fast-math and V5+ fast-math double-precision
|
|
// (actually, keep fast-math and fast-math2 separate for now)
|
|
if (FastMath) {
|
|
setLibcallName(RTLIB::ADD_F64, "__hexagon_fast_adddf3");
|
|
setLibcallName(RTLIB::SUB_F64, "__hexagon_fast_subdf3");
|
|
setLibcallName(RTLIB::MUL_F64, "__hexagon_fast_muldf3");
|
|
setLibcallName(RTLIB::DIV_F64, "__hexagon_fast_divdf3");
|
|
// Calling __hexagon_fast2_divsf3 with fast-math on V5 (ok).
|
|
setLibcallName(RTLIB::DIV_F32, "__hexagon_fast_divsf3");
|
|
} else {
|
|
setLibcallName(RTLIB::ADD_F64, "__hexagon_adddf3");
|
|
setLibcallName(RTLIB::SUB_F64, "__hexagon_subdf3");
|
|
setLibcallName(RTLIB::MUL_F64, "__hexagon_muldf3");
|
|
setLibcallName(RTLIB::DIV_F64, "__hexagon_divdf3");
|
|
setLibcallName(RTLIB::DIV_F32, "__hexagon_divsf3");
|
|
}
|
|
|
|
if (Subtarget.hasV5TOps()) {
|
|
if (FastMath)
|
|
setLibcallName(RTLIB::SQRT_F32, "__hexagon_fast2_sqrtf");
|
|
else
|
|
setLibcallName(RTLIB::SQRT_F32, "__hexagon_sqrtf");
|
|
} else {
|
|
// V4
|
|
setLibcallName(RTLIB::SINTTOFP_I32_F32, "__hexagon_floatsisf");
|
|
setLibcallName(RTLIB::SINTTOFP_I32_F64, "__hexagon_floatsidf");
|
|
setLibcallName(RTLIB::SINTTOFP_I64_F32, "__hexagon_floatdisf");
|
|
setLibcallName(RTLIB::SINTTOFP_I64_F64, "__hexagon_floatdidf");
|
|
setLibcallName(RTLIB::UINTTOFP_I32_F32, "__hexagon_floatunsisf");
|
|
setLibcallName(RTLIB::UINTTOFP_I32_F64, "__hexagon_floatunsidf");
|
|
setLibcallName(RTLIB::UINTTOFP_I64_F32, "__hexagon_floatundisf");
|
|
setLibcallName(RTLIB::UINTTOFP_I64_F64, "__hexagon_floatundidf");
|
|
setLibcallName(RTLIB::FPTOUINT_F32_I32, "__hexagon_fixunssfsi");
|
|
setLibcallName(RTLIB::FPTOUINT_F32_I64, "__hexagon_fixunssfdi");
|
|
setLibcallName(RTLIB::FPTOUINT_F64_I32, "__hexagon_fixunsdfsi");
|
|
setLibcallName(RTLIB::FPTOUINT_F64_I64, "__hexagon_fixunsdfdi");
|
|
setLibcallName(RTLIB::FPTOSINT_F32_I32, "__hexagon_fixsfsi");
|
|
setLibcallName(RTLIB::FPTOSINT_F32_I64, "__hexagon_fixsfdi");
|
|
setLibcallName(RTLIB::FPTOSINT_F64_I32, "__hexagon_fixdfsi");
|
|
setLibcallName(RTLIB::FPTOSINT_F64_I64, "__hexagon_fixdfdi");
|
|
setLibcallName(RTLIB::FPEXT_F32_F64, "__hexagon_extendsfdf2");
|
|
setLibcallName(RTLIB::FPROUND_F64_F32, "__hexagon_truncdfsf2");
|
|
setLibcallName(RTLIB::OEQ_F32, "__hexagon_eqsf2");
|
|
setLibcallName(RTLIB::OEQ_F64, "__hexagon_eqdf2");
|
|
setLibcallName(RTLIB::OGE_F32, "__hexagon_gesf2");
|
|
setLibcallName(RTLIB::OGE_F64, "__hexagon_gedf2");
|
|
setLibcallName(RTLIB::OLE_F32, "__hexagon_lesf2");
|
|
setLibcallName(RTLIB::OLE_F64, "__hexagon_ledf2");
|
|
setLibcallName(RTLIB::UNE_F32, "__hexagon_nesf2");
|
|
setLibcallName(RTLIB::UNE_F64, "__hexagon_nedf2");
|
|
setLibcallName(RTLIB::UO_F32, "__hexagon_unordsf2");
|
|
setLibcallName(RTLIB::UO_F64, "__hexagon_unorddf2");
|
|
setLibcallName(RTLIB::O_F32, "__hexagon_unordsf2");
|
|
setLibcallName(RTLIB::O_F64, "__hexagon_unorddf2");
|
|
}
|
|
|
|
// These cause problems when the shift amount is non-constant.
|
|
setLibcallName(RTLIB::SHL_I128, nullptr);
|
|
setLibcallName(RTLIB::SRL_I128, nullptr);
|
|
setLibcallName(RTLIB::SRA_I128, nullptr);
|
|
}
|
|
|
|
|
|
const char* HexagonTargetLowering::getTargetNodeName(unsigned Opcode) const {
|
|
switch ((HexagonISD::NodeType)Opcode) {
|
|
case HexagonISD::ALLOCA: return "HexagonISD::ALLOCA";
|
|
case HexagonISD::ARGEXTEND: return "HexagonISD::ARGEXTEND";
|
|
case HexagonISD::AT_GOT: return "HexagonISD::AT_GOT";
|
|
case HexagonISD::AT_PCREL: return "HexagonISD::AT_PCREL";
|
|
case HexagonISD::BARRIER: return "HexagonISD::BARRIER";
|
|
case HexagonISD::BR_JT: return "HexagonISD::BR_JT";
|
|
case HexagonISD::CALLR: return "HexagonISD::CALLR";
|
|
case HexagonISD::CALLv3nr: return "HexagonISD::CALLv3nr";
|
|
case HexagonISD::CALLv3: return "HexagonISD::CALLv3";
|
|
case HexagonISD::COMBINE: return "HexagonISD::COMBINE";
|
|
case HexagonISD::CONST32_GP: return "HexagonISD::CONST32_GP";
|
|
case HexagonISD::CONST32: return "HexagonISD::CONST32";
|
|
case HexagonISD::CP: return "HexagonISD::CP";
|
|
case HexagonISD::DCFETCH: return "HexagonISD::DCFETCH";
|
|
case HexagonISD::EH_RETURN: return "HexagonISD::EH_RETURN";
|
|
case HexagonISD::EXTRACTU: return "HexagonISD::EXTRACTU";
|
|
case HexagonISD::EXTRACTURP: return "HexagonISD::EXTRACTURP";
|
|
case HexagonISD::FCONST32: return "HexagonISD::FCONST32";
|
|
case HexagonISD::INSERT: return "HexagonISD::INSERT";
|
|
case HexagonISD::INSERTRP: return "HexagonISD::INSERTRP";
|
|
case HexagonISD::JT: return "HexagonISD::JT";
|
|
case HexagonISD::PACKHL: return "HexagonISD::PACKHL";
|
|
case HexagonISD::PIC_ADD: return "HexagonISD::PIC_ADD";
|
|
case HexagonISD::POPCOUNT: return "HexagonISD::POPCOUNT";
|
|
case HexagonISD::RET_FLAG: return "HexagonISD::RET_FLAG";
|
|
case HexagonISD::SHUFFEB: return "HexagonISD::SHUFFEB";
|
|
case HexagonISD::SHUFFEH: return "HexagonISD::SHUFFEH";
|
|
case HexagonISD::SHUFFOB: return "HexagonISD::SHUFFOB";
|
|
case HexagonISD::SHUFFOH: return "HexagonISD::SHUFFOH";
|
|
case HexagonISD::TC_RETURN: return "HexagonISD::TC_RETURN";
|
|
case HexagonISD::VCMPBEQ: return "HexagonISD::VCMPBEQ";
|
|
case HexagonISD::VCMPBGT: return "HexagonISD::VCMPBGT";
|
|
case HexagonISD::VCMPBGTU: return "HexagonISD::VCMPBGTU";
|
|
case HexagonISD::VCMPHEQ: return "HexagonISD::VCMPHEQ";
|
|
case HexagonISD::VCMPHGT: return "HexagonISD::VCMPHGT";
|
|
case HexagonISD::VCMPHGTU: return "HexagonISD::VCMPHGTU";
|
|
case HexagonISD::VCMPWEQ: return "HexagonISD::VCMPWEQ";
|
|
case HexagonISD::VCMPWGT: return "HexagonISD::VCMPWGT";
|
|
case HexagonISD::VCMPWGTU: return "HexagonISD::VCMPWGTU";
|
|
case HexagonISD::VSHLH: return "HexagonISD::VSHLH";
|
|
case HexagonISD::VSHLW: return "HexagonISD::VSHLW";
|
|
case HexagonISD::VSPLATB: return "HexagonISD::VSPLTB";
|
|
case HexagonISD::VSPLATH: return "HexagonISD::VSPLATH";
|
|
case HexagonISD::VSRAH: return "HexagonISD::VSRAH";
|
|
case HexagonISD::VSRAW: return "HexagonISD::VSRAW";
|
|
case HexagonISD::VSRLH: return "HexagonISD::VSRLH";
|
|
case HexagonISD::VSRLW: return "HexagonISD::VSRLW";
|
|
case HexagonISD::VSXTBH: return "HexagonISD::VSXTBH";
|
|
case HexagonISD::VSXTBW: return "HexagonISD::VSXTBW";
|
|
case HexagonISD::OP_END: break;
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
bool HexagonTargetLowering::isTruncateFree(Type *Ty1, Type *Ty2) const {
|
|
EVT MTy1 = EVT::getEVT(Ty1);
|
|
EVT MTy2 = EVT::getEVT(Ty2);
|
|
if (!MTy1.isSimple() || !MTy2.isSimple())
|
|
return false;
|
|
return (MTy1.getSimpleVT() == MVT::i64) && (MTy2.getSimpleVT() == MVT::i32);
|
|
}
|
|
|
|
bool HexagonTargetLowering::isTruncateFree(EVT VT1, EVT VT2) const {
|
|
if (!VT1.isSimple() || !VT2.isSimple())
|
|
return false;
|
|
return (VT1.getSimpleVT() == MVT::i64) && (VT2.getSimpleVT() == MVT::i32);
|
|
}
|
|
|
|
// shouldExpandBuildVectorWithShuffles
|
|
// Should we expand the build vector with shuffles?
|
|
bool
|
|
HexagonTargetLowering::shouldExpandBuildVectorWithShuffles(EVT VT,
|
|
unsigned DefinedValues) const {
|
|
|
|
// Hexagon vector shuffle operates on element sizes of bytes or halfwords
|
|
EVT EltVT = VT.getVectorElementType();
|
|
int EltBits = EltVT.getSizeInBits();
|
|
if ((EltBits != 8) && (EltBits != 16))
|
|
return false;
|
|
|
|
return TargetLowering::shouldExpandBuildVectorWithShuffles(VT, DefinedValues);
|
|
}
|
|
|
|
// LowerVECTOR_SHUFFLE - Lower a vector shuffle (V1, V2, V3). V1 and
|
|
// V2 are the two vectors to select data from, V3 is the permutation.
|
|
static SDValue LowerVECTOR_SHUFFLE(SDValue Op, SelectionDAG &DAG) {
|
|
const ShuffleVectorSDNode *SVN = cast<ShuffleVectorSDNode>(Op);
|
|
SDValue V1 = Op.getOperand(0);
|
|
SDValue V2 = Op.getOperand(1);
|
|
SDLoc dl(Op);
|
|
EVT VT = Op.getValueType();
|
|
|
|
if (V2.getOpcode() == ISD::UNDEF)
|
|
V2 = V1;
|
|
|
|
if (SVN->isSplat()) {
|
|
int Lane = SVN->getSplatIndex();
|
|
if (Lane == -1) Lane = 0;
|
|
|
|
// Test if V1 is a SCALAR_TO_VECTOR.
|
|
if (Lane == 0 && V1.getOpcode() == ISD::SCALAR_TO_VECTOR)
|
|
return createSplat(DAG, dl, VT, V1.getOperand(0));
|
|
|
|
// Test if V1 is a BUILD_VECTOR which is equivalent to a SCALAR_TO_VECTOR
|
|
// (and probably will turn into a SCALAR_TO_VECTOR once legalization
|
|
// reaches it).
|
|
if (Lane == 0 && V1.getOpcode() == ISD::BUILD_VECTOR &&
|
|
!isa<ConstantSDNode>(V1.getOperand(0))) {
|
|
bool IsScalarToVector = true;
|
|
for (unsigned i = 1, e = V1.getNumOperands(); i != e; ++i)
|
|
if (V1.getOperand(i).getOpcode() != ISD::UNDEF) {
|
|
IsScalarToVector = false;
|
|
break;
|
|
}
|
|
if (IsScalarToVector)
|
|
return createSplat(DAG, dl, VT, V1.getOperand(0));
|
|
}
|
|
return createSplat(DAG, dl, VT, DAG.getConstant(Lane, dl, MVT::i32));
|
|
}
|
|
|
|
// FIXME: We need to support more general vector shuffles. See
|
|
// below the comment from the ARM backend that deals in the general
|
|
// case with the vector shuffles. For now, let expand handle these.
|
|
return SDValue();
|
|
|
|
// If the shuffle is not directly supported and it has 4 elements, use
|
|
// the PerfectShuffle-generated table to synthesize it from other shuffles.
|
|
}
|
|
|
|
// If BUILD_VECTOR has same base element repeated several times,
|
|
// report true.
|
|
static bool isCommonSplatElement(BuildVectorSDNode *BVN) {
|
|
unsigned NElts = BVN->getNumOperands();
|
|
SDValue V0 = BVN->getOperand(0);
|
|
|
|
for (unsigned i = 1, e = NElts; i != e; ++i) {
|
|
if (BVN->getOperand(i) != V0)
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
// LowerVECTOR_SHIFT - Lower a vector shift. Try to convert
|
|
// <VT> = SHL/SRA/SRL <VT> by <VT> to Hexagon specific
|
|
// <VT> = SHL/SRA/SRL <VT> by <IT/i32>.
|
|
static SDValue LowerVECTOR_SHIFT(SDValue Op, SelectionDAG &DAG) {
|
|
BuildVectorSDNode *BVN = 0;
|
|
SDValue V1 = Op.getOperand(0);
|
|
SDValue V2 = Op.getOperand(1);
|
|
SDValue V3;
|
|
SDLoc dl(Op);
|
|
EVT VT = Op.getValueType();
|
|
|
|
if ((BVN = dyn_cast<BuildVectorSDNode>(V1.getNode())) &&
|
|
isCommonSplatElement(BVN))
|
|
V3 = V2;
|
|
else if ((BVN = dyn_cast<BuildVectorSDNode>(V2.getNode())) &&
|
|
isCommonSplatElement(BVN))
|
|
V3 = V1;
|
|
else
|
|
return SDValue();
|
|
|
|
SDValue CommonSplat = BVN->getOperand(0);
|
|
SDValue Result;
|
|
|
|
if (VT.getSimpleVT() == MVT::v4i16) {
|
|
switch (Op.getOpcode()) {
|
|
case ISD::SRA:
|
|
Result = DAG.getNode(HexagonISD::VSRAH, dl, VT, V3, CommonSplat);
|
|
break;
|
|
case ISD::SHL:
|
|
Result = DAG.getNode(HexagonISD::VSHLH, dl, VT, V3, CommonSplat);
|
|
break;
|
|
case ISD::SRL:
|
|
Result = DAG.getNode(HexagonISD::VSRLH, dl, VT, V3, CommonSplat);
|
|
break;
|
|
default:
|
|
return SDValue();
|
|
}
|
|
} else if (VT.getSimpleVT() == MVT::v2i32) {
|
|
switch (Op.getOpcode()) {
|
|
case ISD::SRA:
|
|
Result = DAG.getNode(HexagonISD::VSRAW, dl, VT, V3, CommonSplat);
|
|
break;
|
|
case ISD::SHL:
|
|
Result = DAG.getNode(HexagonISD::VSHLW, dl, VT, V3, CommonSplat);
|
|
break;
|
|
case ISD::SRL:
|
|
Result = DAG.getNode(HexagonISD::VSRLW, dl, VT, V3, CommonSplat);
|
|
break;
|
|
default:
|
|
return SDValue();
|
|
}
|
|
} else {
|
|
return SDValue();
|
|
}
|
|
|
|
return DAG.getNode(ISD::BITCAST, dl, VT, Result);
|
|
}
|
|
|
|
SDValue
|
|
HexagonTargetLowering::LowerBUILD_VECTOR(SDValue Op, SelectionDAG &DAG) const {
|
|
BuildVectorSDNode *BVN = cast<BuildVectorSDNode>(Op.getNode());
|
|
SDLoc dl(Op);
|
|
EVT VT = Op.getValueType();
|
|
|
|
unsigned Size = VT.getSizeInBits();
|
|
|
|
// A vector larger than 64 bits cannot be represented in Hexagon.
|
|
// Expand will split the vector.
|
|
if (Size > 64)
|
|
return SDValue();
|
|
|
|
APInt APSplatBits, APSplatUndef;
|
|
unsigned SplatBitSize;
|
|
bool HasAnyUndefs;
|
|
unsigned NElts = BVN->getNumOperands();
|
|
|
|
// Try to generate a SPLAT instruction.
|
|
if ((VT.getSimpleVT() == MVT::v4i8 || VT.getSimpleVT() == MVT::v4i16) &&
|
|
(BVN->isConstantSplat(APSplatBits, APSplatUndef, SplatBitSize,
|
|
HasAnyUndefs, 0, true) && SplatBitSize <= 16)) {
|
|
unsigned SplatBits = APSplatBits.getZExtValue();
|
|
int32_t SextVal = ((int32_t) (SplatBits << (32 - SplatBitSize)) >>
|
|
(32 - SplatBitSize));
|
|
return createSplat(DAG, dl, VT, DAG.getConstant(SextVal, dl, MVT::i32));
|
|
}
|
|
|
|
// Try to generate COMBINE to build v2i32 vectors.
|
|
if (VT.getSimpleVT() == MVT::v2i32) {
|
|
SDValue V0 = BVN->getOperand(0);
|
|
SDValue V1 = BVN->getOperand(1);
|
|
|
|
if (V0.getOpcode() == ISD::UNDEF)
|
|
V0 = DAG.getConstant(0, dl, MVT::i32);
|
|
if (V1.getOpcode() == ISD::UNDEF)
|
|
V1 = DAG.getConstant(0, dl, MVT::i32);
|
|
|
|
ConstantSDNode *C0 = dyn_cast<ConstantSDNode>(V0);
|
|
ConstantSDNode *C1 = dyn_cast<ConstantSDNode>(V1);
|
|
// If the element isn't a constant, it is in a register:
|
|
// generate a COMBINE Register Register instruction.
|
|
if (!C0 || !C1)
|
|
return DAG.getNode(HexagonISD::COMBINE, dl, VT, V1, V0);
|
|
|
|
// If one of the operands is an 8 bit integer constant, generate
|
|
// a COMBINE Immediate Immediate instruction.
|
|
if (isInt<8>(C0->getSExtValue()) ||
|
|
isInt<8>(C1->getSExtValue()))
|
|
return DAG.getNode(HexagonISD::COMBINE, dl, VT, V1, V0);
|
|
}
|
|
|
|
// Try to generate a S2_packhl to build v2i16 vectors.
|
|
if (VT.getSimpleVT() == MVT::v2i16) {
|
|
for (unsigned i = 0, e = NElts; i != e; ++i) {
|
|
if (BVN->getOperand(i).getOpcode() == ISD::UNDEF)
|
|
continue;
|
|
ConstantSDNode *Cst = dyn_cast<ConstantSDNode>(BVN->getOperand(i));
|
|
// If the element isn't a constant, it is in a register:
|
|
// generate a S2_packhl instruction.
|
|
if (!Cst) {
|
|
SDValue pack = DAG.getNode(HexagonISD::PACKHL, dl, MVT::v4i16,
|
|
BVN->getOperand(1), BVN->getOperand(0));
|
|
|
|
return DAG.getTargetExtractSubreg(Hexagon::subreg_loreg, dl, MVT::v2i16,
|
|
pack);
|
|
}
|
|
}
|
|
}
|
|
|
|
// In the general case, generate a CONST32 or a CONST64 for constant vectors,
|
|
// and insert_vector_elt for all the other cases.
|
|
uint64_t Res = 0;
|
|
unsigned EltSize = Size / NElts;
|
|
SDValue ConstVal;
|
|
uint64_t Mask = ~uint64_t(0ULL) >> (64 - EltSize);
|
|
bool HasNonConstantElements = false;
|
|
|
|
for (unsigned i = 0, e = NElts; i != e; ++i) {
|
|
// LLVM's BUILD_VECTOR operands are in Little Endian mode, whereas Hexagon's
|
|
// combine, const64, etc. are Big Endian.
|
|
unsigned OpIdx = NElts - i - 1;
|
|
SDValue Operand = BVN->getOperand(OpIdx);
|
|
if (Operand.getOpcode() == ISD::UNDEF)
|
|
continue;
|
|
|
|
int64_t Val = 0;
|
|
if (ConstantSDNode *Cst = dyn_cast<ConstantSDNode>(Operand))
|
|
Val = Cst->getSExtValue();
|
|
else
|
|
HasNonConstantElements = true;
|
|
|
|
Val &= Mask;
|
|
Res = (Res << EltSize) | Val;
|
|
}
|
|
|
|
if (Size == 64)
|
|
ConstVal = DAG.getConstant(Res, dl, MVT::i64);
|
|
else
|
|
ConstVal = DAG.getConstant(Res, dl, MVT::i32);
|
|
|
|
// When there are non constant operands, add them with INSERT_VECTOR_ELT to
|
|
// ConstVal, the constant part of the vector.
|
|
if (HasNonConstantElements) {
|
|
EVT EltVT = VT.getVectorElementType();
|
|
SDValue Width = DAG.getConstant(EltVT.getSizeInBits(), dl, MVT::i64);
|
|
SDValue Shifted = DAG.getNode(ISD::SHL, dl, MVT::i64, Width,
|
|
DAG.getConstant(32, dl, MVT::i64));
|
|
|
|
for (unsigned i = 0, e = NElts; i != e; ++i) {
|
|
// LLVM's BUILD_VECTOR operands are in Little Endian mode, whereas Hexagon
|
|
// is Big Endian.
|
|
unsigned OpIdx = NElts - i - 1;
|
|
SDValue Operand = BVN->getOperand(OpIdx);
|
|
if (isa<ConstantSDNode>(Operand))
|
|
// This operand is already in ConstVal.
|
|
continue;
|
|
|
|
if (VT.getSizeInBits() == 64 &&
|
|
Operand.getValueType().getSizeInBits() == 32) {
|
|
SDValue C = DAG.getConstant(0, dl, MVT::i32);
|
|
Operand = DAG.getNode(HexagonISD::COMBINE, dl, VT, C, Operand);
|
|
}
|
|
|
|
SDValue Idx = DAG.getConstant(OpIdx, dl, MVT::i64);
|
|
SDValue Offset = DAG.getNode(ISD::MUL, dl, MVT::i64, Idx, Width);
|
|
SDValue Combined = DAG.getNode(ISD::OR, dl, MVT::i64, Shifted, Offset);
|
|
const SDValue Ops[] = {ConstVal, Operand, Combined};
|
|
|
|
if (VT.getSizeInBits() == 32)
|
|
ConstVal = DAG.getNode(HexagonISD::INSERTRP, dl, MVT::i32, Ops);
|
|
else
|
|
ConstVal = DAG.getNode(HexagonISD::INSERTRP, dl, MVT::i64, Ops);
|
|
}
|
|
}
|
|
|
|
return DAG.getNode(ISD::BITCAST, dl, VT, ConstVal);
|
|
}
|
|
|
|
SDValue
|
|
HexagonTargetLowering::LowerCONCAT_VECTORS(SDValue Op,
|
|
SelectionDAG &DAG) const {
|
|
SDLoc dl(Op);
|
|
EVT VT = Op.getValueType();
|
|
unsigned NElts = Op.getNumOperands();
|
|
SDValue Vec = Op.getOperand(0);
|
|
EVT VecVT = Vec.getValueType();
|
|
SDValue Width = DAG.getConstant(VecVT.getSizeInBits(), dl, MVT::i64);
|
|
SDValue Shifted = DAG.getNode(ISD::SHL, dl, MVT::i64, Width,
|
|
DAG.getConstant(32, dl, MVT::i64));
|
|
SDValue ConstVal = DAG.getConstant(0, dl, MVT::i64);
|
|
|
|
ConstantSDNode *W = dyn_cast<ConstantSDNode>(Width);
|
|
ConstantSDNode *S = dyn_cast<ConstantSDNode>(Shifted);
|
|
|
|
if ((VecVT.getSimpleVT() == MVT::v2i16) && (NElts == 2) && W && S) {
|
|
if ((W->getZExtValue() == 32) && ((S->getZExtValue() >> 32) == 32)) {
|
|
// We are trying to concat two v2i16 to a single v4i16.
|
|
SDValue Vec0 = Op.getOperand(1);
|
|
SDValue Combined = DAG.getNode(HexagonISD::COMBINE, dl, VT, Vec0, Vec);
|
|
return DAG.getNode(ISD::BITCAST, dl, VT, Combined);
|
|
}
|
|
}
|
|
|
|
if ((VecVT.getSimpleVT() == MVT::v4i8) && (NElts == 2) && W && S) {
|
|
if ((W->getZExtValue() == 32) && ((S->getZExtValue() >> 32) == 32)) {
|
|
// We are trying to concat two v4i8 to a single v8i8.
|
|
SDValue Vec0 = Op.getOperand(1);
|
|
SDValue Combined = DAG.getNode(HexagonISD::COMBINE, dl, VT, Vec0, Vec);
|
|
return DAG.getNode(ISD::BITCAST, dl, VT, Combined);
|
|
}
|
|
}
|
|
|
|
for (unsigned i = 0, e = NElts; i != e; ++i) {
|
|
unsigned OpIdx = NElts - i - 1;
|
|
SDValue Operand = Op.getOperand(OpIdx);
|
|
|
|
if (VT.getSizeInBits() == 64 &&
|
|
Operand.getValueType().getSizeInBits() == 32) {
|
|
SDValue C = DAG.getConstant(0, dl, MVT::i32);
|
|
Operand = DAG.getNode(HexagonISD::COMBINE, dl, VT, C, Operand);
|
|
}
|
|
|
|
SDValue Idx = DAG.getConstant(OpIdx, dl, MVT::i64);
|
|
SDValue Offset = DAG.getNode(ISD::MUL, dl, MVT::i64, Idx, Width);
|
|
SDValue Combined = DAG.getNode(ISD::OR, dl, MVT::i64, Shifted, Offset);
|
|
const SDValue Ops[] = {ConstVal, Operand, Combined};
|
|
|
|
if (VT.getSizeInBits() == 32)
|
|
ConstVal = DAG.getNode(HexagonISD::INSERTRP, dl, MVT::i32, Ops);
|
|
else
|
|
ConstVal = DAG.getNode(HexagonISD::INSERTRP, dl, MVT::i64, Ops);
|
|
}
|
|
|
|
return DAG.getNode(ISD::BITCAST, dl, VT, ConstVal);
|
|
}
|
|
|
|
SDValue
|
|
HexagonTargetLowering::LowerEXTRACT_VECTOR(SDValue Op,
|
|
SelectionDAG &DAG) const {
|
|
EVT VT = Op.getValueType();
|
|
int VTN = VT.isVector() ? VT.getVectorNumElements() : 1;
|
|
SDLoc dl(Op);
|
|
SDValue Idx = Op.getOperand(1);
|
|
SDValue Vec = Op.getOperand(0);
|
|
EVT VecVT = Vec.getValueType();
|
|
EVT EltVT = VecVT.getVectorElementType();
|
|
int EltSize = EltVT.getSizeInBits();
|
|
SDValue Width = DAG.getConstant(Op.getOpcode() == ISD::EXTRACT_VECTOR_ELT ?
|
|
EltSize : VTN * EltSize, dl, MVT::i64);
|
|
|
|
// Constant element number.
|
|
if (ConstantSDNode *CI = dyn_cast<ConstantSDNode>(Idx)) {
|
|
uint64_t X = CI->getZExtValue();
|
|
SDValue Offset = DAG.getConstant(X * EltSize, dl, MVT::i32);
|
|
const SDValue Ops[] = {Vec, Width, Offset};
|
|
|
|
ConstantSDNode *CW = dyn_cast<ConstantSDNode>(Width);
|
|
assert(CW && "Non constant width in LowerEXTRACT_VECTOR");
|
|
|
|
SDValue N;
|
|
MVT SVT = VecVT.getSimpleVT();
|
|
uint64_t W = CW->getZExtValue();
|
|
|
|
if (W == 32) {
|
|
// Translate this node into EXTRACT_SUBREG.
|
|
unsigned Subreg = (X == 0) ? Hexagon::subreg_loreg : 0;
|
|
|
|
if (X == 0)
|
|
Subreg = Hexagon::subreg_loreg;
|
|
else if (SVT == MVT::v2i32 && X == 1)
|
|
Subreg = Hexagon::subreg_hireg;
|
|
else if (SVT == MVT::v4i16 && X == 2)
|
|
Subreg = Hexagon::subreg_hireg;
|
|
else if (SVT == MVT::v8i8 && X == 4)
|
|
Subreg = Hexagon::subreg_hireg;
|
|
else
|
|
llvm_unreachable("Bad offset");
|
|
N = DAG.getTargetExtractSubreg(Subreg, dl, MVT::i32, Vec);
|
|
|
|
} else if (VecVT.getSizeInBits() == 32) {
|
|
N = DAG.getNode(HexagonISD::EXTRACTU, dl, MVT::i32, Ops);
|
|
} else {
|
|
N = DAG.getNode(HexagonISD::EXTRACTU, dl, MVT::i64, Ops);
|
|
if (VT.getSizeInBits() == 32)
|
|
N = DAG.getTargetExtractSubreg(Hexagon::subreg_loreg, dl, MVT::i32, N);
|
|
}
|
|
|
|
return DAG.getNode(ISD::BITCAST, dl, VT, N);
|
|
}
|
|
|
|
// Variable element number.
|
|
SDValue Offset = DAG.getNode(ISD::MUL, dl, MVT::i32, Idx,
|
|
DAG.getConstant(EltSize, dl, MVT::i32));
|
|
SDValue Shifted = DAG.getNode(ISD::SHL, dl, MVT::i64, Width,
|
|
DAG.getConstant(32, dl, MVT::i64));
|
|
SDValue Combined = DAG.getNode(ISD::OR, dl, MVT::i64, Shifted, Offset);
|
|
|
|
const SDValue Ops[] = {Vec, Combined};
|
|
|
|
SDValue N;
|
|
if (VecVT.getSizeInBits() == 32) {
|
|
N = DAG.getNode(HexagonISD::EXTRACTURP, dl, MVT::i32, Ops);
|
|
} else {
|
|
N = DAG.getNode(HexagonISD::EXTRACTURP, dl, MVT::i64, Ops);
|
|
if (VT.getSizeInBits() == 32)
|
|
N = DAG.getTargetExtractSubreg(Hexagon::subreg_loreg, dl, MVT::i32, N);
|
|
}
|
|
return DAG.getNode(ISD::BITCAST, dl, VT, N);
|
|
}
|
|
|
|
SDValue
|
|
HexagonTargetLowering::LowerINSERT_VECTOR(SDValue Op,
|
|
SelectionDAG &DAG) const {
|
|
EVT VT = Op.getValueType();
|
|
int VTN = VT.isVector() ? VT.getVectorNumElements() : 1;
|
|
SDLoc dl(Op);
|
|
SDValue Vec = Op.getOperand(0);
|
|
SDValue Val = Op.getOperand(1);
|
|
SDValue Idx = Op.getOperand(2);
|
|
EVT VecVT = Vec.getValueType();
|
|
EVT EltVT = VecVT.getVectorElementType();
|
|
int EltSize = EltVT.getSizeInBits();
|
|
SDValue Width = DAG.getConstant(Op.getOpcode() == ISD::INSERT_VECTOR_ELT ?
|
|
EltSize : VTN * EltSize, dl, MVT::i64);
|
|
|
|
if (ConstantSDNode *C = cast<ConstantSDNode>(Idx)) {
|
|
SDValue Offset = DAG.getConstant(C->getSExtValue() * EltSize, dl, MVT::i32);
|
|
const SDValue Ops[] = {Vec, Val, Width, Offset};
|
|
|
|
SDValue N;
|
|
if (VT.getSizeInBits() == 32)
|
|
N = DAG.getNode(HexagonISD::INSERT, dl, MVT::i32, Ops);
|
|
else
|
|
N = DAG.getNode(HexagonISD::INSERT, dl, MVT::i64, Ops);
|
|
|
|
return DAG.getNode(ISD::BITCAST, dl, VT, N);
|
|
}
|
|
|
|
// Variable element number.
|
|
SDValue Offset = DAG.getNode(ISD::MUL, dl, MVT::i32, Idx,
|
|
DAG.getConstant(EltSize, dl, MVT::i32));
|
|
SDValue Shifted = DAG.getNode(ISD::SHL, dl, MVT::i64, Width,
|
|
DAG.getConstant(32, dl, MVT::i64));
|
|
SDValue Combined = DAG.getNode(ISD::OR, dl, MVT::i64, Shifted, Offset);
|
|
|
|
if (VT.getSizeInBits() == 64 &&
|
|
Val.getValueType().getSizeInBits() == 32) {
|
|
SDValue C = DAG.getConstant(0, dl, MVT::i32);
|
|
Val = DAG.getNode(HexagonISD::COMBINE, dl, VT, C, Val);
|
|
}
|
|
|
|
const SDValue Ops[] = {Vec, Val, Combined};
|
|
|
|
SDValue N;
|
|
if (VT.getSizeInBits() == 32)
|
|
N = DAG.getNode(HexagonISD::INSERTRP, dl, MVT::i32, Ops);
|
|
else
|
|
N = DAG.getNode(HexagonISD::INSERTRP, dl, MVT::i64, Ops);
|
|
|
|
return DAG.getNode(ISD::BITCAST, dl, VT, N);
|
|
}
|
|
|
|
bool
|
|
HexagonTargetLowering::allowTruncateForTailCall(Type *Ty1, Type *Ty2) const {
|
|
// Assuming the caller does not have either a signext or zeroext modifier, and
|
|
// only one value is accepted, any reasonable truncation is allowed.
|
|
if (!Ty1->isIntegerTy() || !Ty2->isIntegerTy())
|
|
return false;
|
|
|
|
// FIXME: in principle up to 64-bit could be made safe, but it would be very
|
|
// fragile at the moment: any support for multiple value returns would be
|
|
// liable to disallow tail calls involving i64 -> iN truncation in many cases.
|
|
return Ty1->getPrimitiveSizeInBits() <= 32;
|
|
}
|
|
|
|
SDValue
|
|
HexagonTargetLowering::LowerEH_RETURN(SDValue Op, SelectionDAG &DAG) const {
|
|
SDValue Chain = Op.getOperand(0);
|
|
SDValue Offset = Op.getOperand(1);
|
|
SDValue Handler = Op.getOperand(2);
|
|
SDLoc dl(Op);
|
|
auto PtrVT = getPointerTy(DAG.getDataLayout());
|
|
|
|
// Mark function as containing a call to EH_RETURN.
|
|
HexagonMachineFunctionInfo *FuncInfo =
|
|
DAG.getMachineFunction().getInfo<HexagonMachineFunctionInfo>();
|
|
FuncInfo->setHasEHReturn();
|
|
|
|
unsigned OffsetReg = Hexagon::R28;
|
|
|
|
SDValue StoreAddr =
|
|
DAG.getNode(ISD::ADD, dl, PtrVT, DAG.getRegister(Hexagon::R30, PtrVT),
|
|
DAG.getIntPtrConstant(4, dl));
|
|
Chain = DAG.getStore(Chain, dl, Handler, StoreAddr, MachinePointerInfo(),
|
|
false, false, 0);
|
|
Chain = DAG.getCopyToReg(Chain, dl, OffsetReg, Offset);
|
|
|
|
// Not needed we already use it as explict input to EH_RETURN.
|
|
// MF.getRegInfo().addLiveOut(OffsetReg);
|
|
|
|
return DAG.getNode(HexagonISD::EH_RETURN, dl, MVT::Other, Chain);
|
|
}
|
|
|
|
SDValue
|
|
HexagonTargetLowering::LowerOperation(SDValue Op, SelectionDAG &DAG) const {
|
|
unsigned Opc = Op.getOpcode();
|
|
switch (Opc) {
|
|
default:
|
|
#ifndef NDEBUG
|
|
Op.getNode()->dumpr(&DAG);
|
|
if (Opc > HexagonISD::OP_BEGIN && Opc < HexagonISD::OP_END)
|
|
errs() << "Check for a non-legal type in this operation\n";
|
|
#endif
|
|
llvm_unreachable("Should not custom lower this!");
|
|
case ISD::CONCAT_VECTORS: return LowerCONCAT_VECTORS(Op, DAG);
|
|
case ISD::INSERT_SUBVECTOR: return LowerINSERT_VECTOR(Op, DAG);
|
|
case ISD::INSERT_VECTOR_ELT: return LowerINSERT_VECTOR(Op, DAG);
|
|
case ISD::EXTRACT_SUBVECTOR: return LowerEXTRACT_VECTOR(Op, DAG);
|
|
case ISD::EXTRACT_VECTOR_ELT: return LowerEXTRACT_VECTOR(Op, DAG);
|
|
case ISD::BUILD_VECTOR: return LowerBUILD_VECTOR(Op, DAG);
|
|
case ISD::VECTOR_SHUFFLE: return LowerVECTOR_SHUFFLE(Op, DAG);
|
|
case ISD::SRA:
|
|
case ISD::SHL:
|
|
case ISD::SRL: return LowerVECTOR_SHIFT(Op, DAG);
|
|
case ISD::ConstantPool: return LowerConstantPool(Op, DAG);
|
|
case ISD::EH_RETURN: return LowerEH_RETURN(Op, DAG);
|
|
// Frame & Return address. Currently unimplemented.
|
|
case ISD::RETURNADDR: return LowerRETURNADDR(Op, DAG);
|
|
case ISD::FRAMEADDR: return LowerFRAMEADDR(Op, DAG);
|
|
case ISD::ATOMIC_FENCE: return LowerATOMIC_FENCE(Op, DAG);
|
|
case ISD::GlobalAddress: return LowerGLOBALADDRESS(Op, DAG);
|
|
case ISD::BlockAddress: return LowerBlockAddress(Op, DAG);
|
|
case ISD::VASTART: return LowerVASTART(Op, DAG);
|
|
case ISD::BR_JT: return LowerBR_JT(Op, DAG);
|
|
// Custom lower some vector loads.
|
|
case ISD::LOAD: return LowerLOAD(Op, DAG);
|
|
case ISD::DYNAMIC_STACKALLOC: return LowerDYNAMIC_STACKALLOC(Op, DAG);
|
|
case ISD::SETCC: return LowerSETCC(Op, DAG);
|
|
case ISD::VSELECT: return LowerVSELECT(Op, DAG);
|
|
case ISD::CTPOP: return LowerCTPOP(Op, DAG);
|
|
case ISD::INTRINSIC_WO_CHAIN: return LowerINTRINSIC_WO_CHAIN(Op, DAG);
|
|
case ISD::INLINEASM: return LowerINLINEASM(Op, DAG);
|
|
}
|
|
}
|
|
|
|
MachineBasicBlock *
|
|
HexagonTargetLowering::EmitInstrWithCustomInserter(MachineInstr *MI,
|
|
MachineBasicBlock *BB)
|
|
const {
|
|
switch (MI->getOpcode()) {
|
|
case Hexagon::ALLOCA: {
|
|
MachineFunction *MF = BB->getParent();
|
|
auto *FuncInfo = MF->getInfo<HexagonMachineFunctionInfo>();
|
|
FuncInfo->addAllocaAdjustInst(MI);
|
|
return BB;
|
|
}
|
|
default: llvm_unreachable("Unexpected instr type to insert");
|
|
} // switch
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Inline Assembly Support
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
std::pair<unsigned, const TargetRegisterClass *>
|
|
HexagonTargetLowering::getRegForInlineAsmConstraint(
|
|
const TargetRegisterInfo *TRI, StringRef Constraint, MVT VT) const {
|
|
if (Constraint.size() == 1) {
|
|
switch (Constraint[0]) {
|
|
case 'r': // R0-R31
|
|
switch (VT.SimpleTy) {
|
|
default:
|
|
llvm_unreachable("getRegForInlineAsmConstraint Unhandled data type");
|
|
case MVT::i32:
|
|
case MVT::i16:
|
|
case MVT::i8:
|
|
case MVT::f32:
|
|
return std::make_pair(0U, &Hexagon::IntRegsRegClass);
|
|
case MVT::i64:
|
|
case MVT::f64:
|
|
return std::make_pair(0U, &Hexagon::DoubleRegsRegClass);
|
|
}
|
|
default:
|
|
llvm_unreachable("Unknown asm register class");
|
|
}
|
|
}
|
|
|
|
return TargetLowering::getRegForInlineAsmConstraint(TRI, Constraint, VT);
|
|
}
|
|
|
|
/// isFPImmLegal - Returns true if the target can instruction select the
|
|
/// specified FP immediate natively. If false, the legalizer will
|
|
/// materialize the FP immediate as a load from a constant pool.
|
|
bool HexagonTargetLowering::isFPImmLegal(const APFloat &Imm, EVT VT) const {
|
|
return Subtarget.hasV5TOps();
|
|
}
|
|
|
|
/// isLegalAddressingMode - Return true if the addressing mode represented by
|
|
/// AM is legal for this target, for a load/store of the specified type.
|
|
bool HexagonTargetLowering::isLegalAddressingMode(const DataLayout &DL,
|
|
const AddrMode &AM, Type *Ty,
|
|
unsigned AS) const {
|
|
// Allows a signed-extended 11-bit immediate field.
|
|
if (AM.BaseOffs <= -(1LL << 13) || AM.BaseOffs >= (1LL << 13)-1)
|
|
return false;
|
|
|
|
// No global is ever allowed as a base.
|
|
if (AM.BaseGV)
|
|
return false;
|
|
|
|
int Scale = AM.Scale;
|
|
if (Scale < 0) Scale = -Scale;
|
|
switch (Scale) {
|
|
case 0: // No scale reg, "r+i", "r", or just "i".
|
|
break;
|
|
default: // No scaled addressing mode.
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/// isLegalICmpImmediate - Return true if the specified immediate is legal
|
|
/// icmp immediate, that is the target has icmp instructions which can compare
|
|
/// a register against the immediate without having to materialize the
|
|
/// immediate into a register.
|
|
bool HexagonTargetLowering::isLegalICmpImmediate(int64_t Imm) const {
|
|
return Imm >= -512 && Imm <= 511;
|
|
}
|
|
|
|
/// IsEligibleForTailCallOptimization - Check whether the call is eligible
|
|
/// for tail call optimization. Targets which want to do tail call
|
|
/// optimization should implement this function.
|
|
bool HexagonTargetLowering::IsEligibleForTailCallOptimization(
|
|
SDValue Callee,
|
|
CallingConv::ID CalleeCC,
|
|
bool isVarArg,
|
|
bool isCalleeStructRet,
|
|
bool isCallerStructRet,
|
|
const SmallVectorImpl<ISD::OutputArg> &Outs,
|
|
const SmallVectorImpl<SDValue> &OutVals,
|
|
const SmallVectorImpl<ISD::InputArg> &Ins,
|
|
SelectionDAG& DAG) const {
|
|
const Function *CallerF = DAG.getMachineFunction().getFunction();
|
|
CallingConv::ID CallerCC = CallerF->getCallingConv();
|
|
bool CCMatch = CallerCC == CalleeCC;
|
|
|
|
// ***************************************************************************
|
|
// Look for obvious safe cases to perform tail call optimization that do not
|
|
// require ABI changes.
|
|
// ***************************************************************************
|
|
|
|
// If this is a tail call via a function pointer, then don't do it!
|
|
if (!(dyn_cast<GlobalAddressSDNode>(Callee))
|
|
&& !(dyn_cast<ExternalSymbolSDNode>(Callee))) {
|
|
return false;
|
|
}
|
|
|
|
// Do not optimize if the calling conventions do not match.
|
|
if (!CCMatch)
|
|
return false;
|
|
|
|
// Do not tail call optimize vararg calls.
|
|
if (isVarArg)
|
|
return false;
|
|
|
|
// Also avoid tail call optimization if either caller or callee uses struct
|
|
// return semantics.
|
|
if (isCalleeStructRet || isCallerStructRet)
|
|
return false;
|
|
|
|
// In addition to the cases above, we also disable Tail Call Optimization if
|
|
// the calling convention code that at least one outgoing argument needs to
|
|
// go on the stack. We cannot check that here because at this point that
|
|
// information is not available.
|
|
return true;
|
|
}
|
|
|
|
// Return true when the given node fits in a positive half word.
|
|
bool llvm::isPositiveHalfWord(SDNode *N) {
|
|
ConstantSDNode *CN = dyn_cast<ConstantSDNode>(N);
|
|
if (CN && CN->getSExtValue() > 0 && isInt<16>(CN->getSExtValue()))
|
|
return true;
|
|
|
|
switch (N->getOpcode()) {
|
|
default:
|
|
return false;
|
|
case ISD::SIGN_EXTEND_INREG:
|
|
return true;
|
|
}
|
|
}
|
|
|
|
Value *HexagonTargetLowering::emitLoadLinked(IRBuilder<> &Builder, Value *Addr,
|
|
AtomicOrdering Ord) const {
|
|
BasicBlock *BB = Builder.GetInsertBlock();
|
|
Module *M = BB->getParent()->getParent();
|
|
Type *Ty = cast<PointerType>(Addr->getType())->getElementType();
|
|
unsigned SZ = Ty->getPrimitiveSizeInBits();
|
|
assert((SZ == 32 || SZ == 64) && "Only 32/64-bit atomic loads supported");
|
|
Intrinsic::ID IntID = (SZ == 32) ? Intrinsic::hexagon_L2_loadw_locked
|
|
: Intrinsic::hexagon_L4_loadd_locked;
|
|
Value *Fn = Intrinsic::getDeclaration(M, IntID);
|
|
return Builder.CreateCall(Fn, Addr, "larx");
|
|
}
|
|
|
|
/// Perform a store-conditional operation to Addr. Return the status of the
|
|
/// store. This should be 0 if the store succeeded, non-zero otherwise.
|
|
Value *HexagonTargetLowering::emitStoreConditional(IRBuilder<> &Builder,
|
|
Value *Val, Value *Addr, AtomicOrdering Ord) const {
|
|
BasicBlock *BB = Builder.GetInsertBlock();
|
|
Module *M = BB->getParent()->getParent();
|
|
Type *Ty = Val->getType();
|
|
unsigned SZ = Ty->getPrimitiveSizeInBits();
|
|
assert((SZ == 32 || SZ == 64) && "Only 32/64-bit atomic stores supported");
|
|
Intrinsic::ID IntID = (SZ == 32) ? Intrinsic::hexagon_S2_storew_locked
|
|
: Intrinsic::hexagon_S4_stored_locked;
|
|
Value *Fn = Intrinsic::getDeclaration(M, IntID);
|
|
Value *Call = Builder.CreateCall(Fn, {Addr, Val}, "stcx");
|
|
Value *Cmp = Builder.CreateICmpEQ(Call, Builder.getInt32(0), "");
|
|
Value *Ext = Builder.CreateZExt(Cmp, Type::getInt32Ty(M->getContext()));
|
|
return Ext;
|
|
}
|
|
|
|
bool HexagonTargetLowering::shouldExpandAtomicLoadInIR(LoadInst *LI) const {
|
|
// Do not expand loads and stores that don't exceed 64 bits.
|
|
return LI->getType()->getPrimitiveSizeInBits() > 64;
|
|
}
|
|
|
|
bool HexagonTargetLowering::shouldExpandAtomicStoreInIR(StoreInst *SI) const {
|
|
// Do not expand loads and stores that don't exceed 64 bits.
|
|
return SI->getValueOperand()->getType()->getPrimitiveSizeInBits() > 64;
|
|
}
|
|
|