#include "SparcInstrSelectionSupport.h"
#include "llvm/CodeGen/InstrSelection.h"
#include "llvm/CodeGen/InstrSelectionSupport.h"
-#include "llvm/CodeGen/MachineCodeForMethod.h"
+#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineCodeForInstruction.h"
#include "llvm/Function.h"
#include "llvm/Constants.h"
#include "llvm/DerivedTypes.h"
+#include <stdlib.h>
using std::vector;
static const uint32_t MAXLO = (1 << 10) - 1; // set bits set by %lo(*)
}
+//---------------------------------------------------------------------------
+// Create a table of LLVM opcode -> max. immediate constant likely to
+// be usable for that operation.
+//---------------------------------------------------------------------------
+
+// Entry == 0 ==> no immediate constant field exists at all.
+// Entry > 0 ==> abs(immediate constant) <= Entry
+//
+vector<int> MaxConstantsTable(Instruction::OtherOpsEnd);
+
+static int
+MaxConstantForInstr(unsigned llvmOpCode)
+{
+ int modelOpCode = -1;
+
+ if (llvmOpCode >= Instruction::BinaryOpsBegin &&
+ llvmOpCode < Instruction::BinaryOpsEnd)
+ modelOpCode = ADD;
+ else
+ switch(llvmOpCode) {
+ case Instruction::Ret: modelOpCode = JMPLCALL; break;
+
+ case Instruction::Malloc:
+ case Instruction::Alloca:
+ case Instruction::GetElementPtr:
+ case Instruction::PHINode:
+ case Instruction::Cast:
+ case Instruction::Call: modelOpCode = ADD; break;
+
+ case Instruction::Shl:
+ case Instruction::Shr: modelOpCode = SLLX; break;
+
+ default: break;
+ };
+
+ return (modelOpCode < 0)? 0: SparcMachineInstrDesc[modelOpCode].maxImmedConst;
+}
+
+static void
+InitializeMaxConstantsTable()
+{
+ unsigned op;
+ assert(MaxConstantsTable.size() == Instruction::OtherOpsEnd &&
+ "assignments below will be illegal!");
+ for (op = Instruction::TermOpsBegin; op < Instruction::TermOpsEnd; ++op)
+ MaxConstantsTable[op] = MaxConstantForInstr(op);
+ for (op = Instruction::BinaryOpsBegin; op < Instruction::BinaryOpsEnd; ++op)
+ MaxConstantsTable[op] = MaxConstantForInstr(op);
+ for (op = Instruction::MemoryOpsBegin; op < Instruction::MemoryOpsEnd; ++op)
+ MaxConstantsTable[op] = MaxConstantForInstr(op);
+ for (op = Instruction::OtherOpsBegin; op < Instruction::OtherOpsEnd; ++op)
+ MaxConstantsTable[op] = MaxConstantForInstr(op);
+}
+
+
//---------------------------------------------------------------------------
// class UltraSparcInstrInfo
//
//---------------------------------------------------------------------------
/*ctor*/
-UltraSparcInstrInfo::UltraSparcInstrInfo(const TargetMachine& tgt)
- : MachineInstrInfo(tgt, SparcMachineInstrDesc,
+UltraSparcInstrInfo::UltraSparcInstrInfo()
+ : MachineInstrInfo(SparcMachineInstrDesc,
/*descSize = */ NUM_TOTAL_OPCODES,
/*numRealOpCodes = */ NUM_REAL_OPCODES)
{
+ InitializeMaxConstantsTable();
+}
+
+bool
+UltraSparcInstrInfo::ConstantMayNotFitInImmedField(const Constant* CV,
+ const Instruction* I) const
+{
+ if (I->getOpcode() >= MaxConstantsTable.size()) // user-defined op (or bug!)
+ return true;
+
+ if (isa<ConstantPointerNull>(CV)) // can always use %g0
+ return false;
+
+ if (const ConstantUInt* U = dyn_cast<ConstantUInt>(CV))
+ /* Large unsigned longs may really just be small negative signed longs */
+ return (labs((int64_t) U->getValue()) > MaxConstantsTable[I->getOpcode()]);
+
+ if (const ConstantSInt* S = dyn_cast<ConstantSInt>(CV))
+ return (labs(S->getValue()) > MaxConstantsTable[I->getOpcode()]);
+
+ if (isa<ConstantBool>(CV))
+ return (1 > MaxConstantsTable[I->getOpcode()]);
+
+ return true;
}
//
// GlobalValue, viz., the constant address of a global variable or function.
// The generated instructions are returned in `mvec'.
// Any temp. registers (TmpInstruction) created are recorded in mcfi.
-// Any stack space required is allocated via MachineCodeForMethod.
+// Any stack space required is allocated via MachineFunction.
//
void
UltraSparcInstrInfo::CreateCodeToLoadConst(const TargetMachine& target,
//
const Type* valType = val->getType();
+ // Unfortunate special case: a ConstantPointerRef is just a
+ // reference to GlobalValue.
+ if (isa<ConstantPointerRef>(val))
+ val = cast<ConstantPointerRef>(val)->getValue();
+
if (isa<GlobalValue>(val))
{
TmpInstruction* tmpReg =
mvec.push_back(MI);
// Make sure constant is emitted to constant pool in assembly code.
- MachineCodeForMethod::get(F).addToConstantPool(cast<Constant>(val));
+ MachineFunction::get(F).addToConstantPool(cast<Constant>(val));
}
}
// val must be an integral type. dest must be a Float or Double.
// The generated instructions are returned in `mvec'.
// Any temp. registers (TmpInstruction) created are recorded in mcfi.
-// Any stack space required is allocated via MachineCodeForMethod.
+// Any stack space required is allocated via MachineFunction.
//
void
UltraSparcInstrInfo::CreateCodeToCopyIntToFloat(const TargetMachine& target,
&& "Dest type must be float/double");
// Get a stack slot to use for the copy
- int offset = MachineCodeForMethod::get(F).allocateLocalVar(target, val);
+ int offset = MachineFunction::get(F).allocateLocalVar(target, val);
// Get the size of the source value being copied.
size_t srcSize = target.DataLayout.getTypeSize(val->getType());
{ // sign- or zero-extend respectively
storeVal = new TmpInstruction(storeType, val);
if (val->getType()->isSigned())
- CreateSignExtensionInstructions(target, F, val, 8*srcSize, storeVal,
+ CreateSignExtensionInstructions(target, F, val, storeVal, 8*srcSize,
mvec, mcfi);
else
- CreateZeroExtensionInstructions(target, F, val, 8*srcSize, storeVal,
+ CreateZeroExtensionInstructions(target, F, val, storeVal, 8*srcSize,
mvec, mcfi);
}
MachineInstr* store=new MachineInstr(ChooseStoreInstruction(storeType));
// `val' to an integer register `dest' by copying to memory and back.
// The generated instructions are returned in `mvec'.
// Any temp. registers (TmpInstruction) created are recorded in mcfi.
-// Any stack space required is allocated via MachineCodeForMethod.
+// Any stack space required is allocated via MachineFunction.
//
void
UltraSparcInstrInfo::CreateCodeToCopyFloatToInt(const TargetMachine& target,
assert((destTy->isIntegral() || isa<PointerType>(destTy))
&& "Dest type must be integer, bool or pointer");
- int offset = MachineCodeForMethod::get(F).allocateLocalVar(target, val);
+ int offset = MachineFunction::get(F).allocateLocalVar(target, val);
// Store instruction stores `val' to [%fp+offset].
// The store opCode is based only the source value being copied.
// Create instruction(s) to copy src to dest, for arbitrary types
// The generated instructions are returned in `mvec'.
// Any temp. registers (TmpInstruction) created are recorded in mcfi.
-// Any stack space required is allocated via MachineCodeForMethod.
+// Any stack space required is allocated via MachineFunction.
//
void
UltraSparcInstrInfo::CreateCopyInstructionsByType(const TargetMachine& target,
const TargetMachine& target,
Function* F,
Value* srcVal,
- unsigned int srcSizeInBits,
- Value* dest,
+ Value* destVal,
+ unsigned int numLowBits,
vector<MachineInstr*>& mvec,
MachineCodeForInstruction& mcfi)
{
MachineInstr* M;
- assert(srcSizeInBits <= 32 &&
- "Hmmm... 32 < srcSizeInBits < 64 unexpected but could be handled.");
- if (srcSizeInBits < 32)
+ assert(numLowBits <= 32 && "Otherwise, nothing should be done here!");
+
+ if (numLowBits < 32)
{ // SLL is needed since operand size is < 32 bits.
- TmpInstruction *tmpI = new TmpInstruction(dest->getType(),
- srcVal, dest,"make32");
+ TmpInstruction *tmpI = new TmpInstruction(destVal->getType(),
+ srcVal, destVal, "make32");
mcfi.addTemp(tmpI);
- M = Create3OperandInstr_UImmed(SLLX, srcVal, 32-srcSizeInBits, tmpI);
+ M = Create3OperandInstr_UImmed(SLLX, srcVal, 32-numLowBits, tmpI);
mvec.push_back(M);
srcVal = tmpI;
}
M = Create3OperandInstr_UImmed(signExtend? SRA : SRL,
- srcVal, 32-srcSizeInBits, dest);
+ srcVal, 32-numLowBits, destVal);
mvec.push_back(M);
}
// from an arbitrary-sized integer value (sized in bits, not bytes).
// The generated instructions are returned in `mvec'.
// Any temp. registers (TmpInstruction) created are recorded in mcfi.
-// Any stack space required is allocated via MachineCodeForMethod.
+// Any stack space required is allocated via MachineFunction.
//
void
UltraSparcInstrInfo::CreateSignExtensionInstructions(
const TargetMachine& target,
Function* F,
Value* srcVal,
- unsigned int srcSizeInBits,
- Value* dest,
+ Value* destVal,
+ unsigned int numLowBits,
vector<MachineInstr*>& mvec,
MachineCodeForInstruction& mcfi) const
{
CreateBitExtensionInstructions(/*signExtend*/ true, target, F, srcVal,
- srcSizeInBits, dest, mvec, mcfi);
+ destVal, numLowBits, mvec, mcfi);
}
// For SPARC v9, we sign-extend the given operand using SLL; SRL.
// The generated instructions are returned in `mvec'.
// Any temp. registers (TmpInstruction) created are recorded in mcfi.
-// Any stack space required is allocated via MachineCodeForMethod.
+// Any stack space required is allocated via MachineFunction.
//
void
UltraSparcInstrInfo::CreateZeroExtensionInstructions(
const TargetMachine& target,
Function* F,
Value* srcVal,
- unsigned int srcSizeInBits,
- Value* dest,
+ Value* destVal,
+ unsigned int numLowBits,
vector<MachineInstr*>& mvec,
MachineCodeForInstruction& mcfi) const
{
CreateBitExtensionInstructions(/*signExtend*/ false, target, F, srcVal,
- srcSizeInBits, dest, mvec, mcfi);
+ destVal, numLowBits, mvec, mcfi);
}
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