-//***************************************************************************
-// File:
-// Sparc.cpp
-//
-// Purpose:
-//
-// History:
-// 7/15/01 - Vikram Adve - Created
-//**************************************************************************/
+//===-- Sparc.cpp - General implementation file for the Sparc Target ------===//
+//
+// This file contains the code for the Sparc Target that does not fit in any of
+// the other files in this directory.
+//
+//===----------------------------------------------------------------------===//
-#include "llvm/Target/Sparc.h"
#include "SparcInternals.h"
-#include "llvm/Method.h"
-#include "llvm/CodeGen/InstrScheduling.h"
-#include "llvm/CodeGen/InstrSelection.h"
+#include "llvm/Target/Sparc.h"
+#include "llvm/Function.h"
+#include "llvm/BasicBlock.h"
+#include "llvm/CodeGen/MachineCodeForMethod.h"
+#include <iostream>
+using std::cerr;
+
+// Build the MachineInstruction Description Array...
+const MachineInstrDescriptor SparcMachineInstrDesc[] = {
+#define I(ENUM, OPCODESTRING, NUMOPERANDS, RESULTPOS, MAXIMM, IMMSE, \
+ NUMDELAYSLOTS, LATENCY, SCHEDCLASS, INSTFLAGS) \
+ { OPCODESTRING, NUMOPERANDS, RESULTPOS, MAXIMM, IMMSE, \
+ NUMDELAYSLOTS, LATENCY, SCHEDCLASS, INSTFLAGS },
+#include "SparcInstr.def"
+};
+//----------------------------------------------------------------------------
// allocateSparcTargetMachine - Allocate and return a subclass of TargetMachine
// that implements the Sparc backend. (the llvm/CodeGen/Sparc.h interface)
-//
+//----------------------------------------------------------------------------
+
TargetMachine *allocateSparcTargetMachine() { return new UltraSparc(); }
+
//---------------------------------------------------------------------------
-// class UltraSparcInstrInfo
+// class UltraSparcFrameInfo
//
// Purpose:
-// Information about individual instructions.
-// Most information is stored in the SparcMachineInstrDesc array above.
-// Other information is computed on demand, and most such functions
-// default to member functions in base class MachineInstrInfo.
+// Interface to stack frame layout info for the UltraSPARC.
+// Starting offsets for each area of the stack frame are aligned at
+// a multiple of getStackFrameSizeAlignment().
//---------------------------------------------------------------------------
-/*ctor*/
-UltraSparcInstrInfo::UltraSparcInstrInfo()
- : MachineInstrInfo(SparcMachineInstrDesc,
- /*descSize = */ NUM_TOTAL_OPCODES,
- /*numRealOpCodes = */ NUM_REAL_OPCODES)
+int
+UltraSparcFrameInfo::getFirstAutomaticVarOffset(MachineCodeForMethod& ,
+ bool& pos) const
{
+ pos = false; // static stack area grows downwards
+ return StaticAreaOffsetFromFP;
}
-
-//---------------------------------------------------------------------------
-// class UltraSparcSchedInfo
-//
-// Purpose:
-// Scheduling information for the UltraSPARC.
-// Primarily just initializes machine-dependent parameters in
-// class MachineSchedInfo.
-//---------------------------------------------------------------------------
-
-/*ctor*/
-UltraSparcSchedInfo::UltraSparcSchedInfo(const MachineInstrInfo* mii)
- : MachineSchedInfo((unsigned int) SPARC_NUM_SCHED_CLASSES,
- mii,
- SparcRUsageDesc,
- SparcInstrUsageDeltas,
- SparcInstrIssueDeltas,
- sizeof(SparcInstrUsageDeltas)/sizeof(InstrRUsageDelta),
- sizeof(SparcInstrIssueDeltas)/sizeof(InstrIssueDelta))
+int
+UltraSparcFrameInfo::getRegSpillAreaOffset(MachineCodeForMethod& mcInfo,
+ bool& pos) const
{
- maxNumIssueTotal = 4;
- longestIssueConflict = 0; // computed from issuesGaps[]
+ mcInfo.freezeAutomaticVarsArea(); // ensure no more auto vars are added
- branchMispredictPenalty = 4; // 4 for SPARC IIi
- branchTargetUnknownPenalty = 2; // 2 for SPARC IIi
- l1DCacheMissPenalty = 8; // 7 or 9 for SPARC IIi
- l1ICacheMissPenalty = 8; // ? for SPARC IIi
-
- inOrderLoads = true; // true for SPARC IIi
- inOrderIssue = true; // true for SPARC IIi
- inOrderExec = false; // false for most architectures
- inOrderRetire= true; // true for most architectures
-
- // must be called after above parameters are initialized.
- this->initializeResources();
+ pos = false; // static stack area grows downwards
+ unsigned int autoVarsSize = mcInfo.getAutomaticVarsSize();
+ return StaticAreaOffsetFromFP - autoVarsSize;
}
-void
-UltraSparcSchedInfo::initializeResources()
+int
+UltraSparcFrameInfo::getTmpAreaOffset(MachineCodeForMethod& mcInfo,
+ bool& pos) const
{
- // Compute MachineSchedInfo::instrRUsages and MachineSchedInfo::issueGaps
- MachineSchedInfo::initializeResources();
+ mcInfo.freezeAutomaticVarsArea(); // ensure no more auto vars are added
+ mcInfo.freezeSpillsArea(); // ensure no more spill slots are added
- // Machine-dependent fixups go here. None for now.
+ pos = false; // static stack area grows downwards
+ unsigned int autoVarsSize = mcInfo.getAutomaticVarsSize();
+ unsigned int spillAreaSize = mcInfo.getRegSpillsSize();
+ int offset = autoVarsSize + spillAreaSize;
+ return StaticAreaOffsetFromFP - offset;
+}
+
+int
+UltraSparcFrameInfo::getDynamicAreaOffset(MachineCodeForMethod& mcInfo,
+ bool& pos) const
+{
+ // Dynamic stack area grows downwards starting at top of opt-args area.
+ // The opt-args, required-args, and register-save areas are empty except
+ // during calls and traps, so they are shifted downwards on each
+ // dynamic-size alloca.
+ pos = false;
+ unsigned int optArgsSize = mcInfo.getMaxOptionalArgsSize();
+ if (int extra = optArgsSize % getStackFrameSizeAlignment())
+ optArgsSize += (getStackFrameSizeAlignment() - extra);
+ int offset = optArgsSize + FirstOptionalOutgoingArgOffsetFromSP;
+ assert((offset - OFFSET) % getStackFrameSizeAlignment() == 0);
+ return offset;
}
//
//---------------------------------------------------------------------------
-UltraSparc::UltraSparc() : TargetMachine("UltraSparc-Native"),
- InstSchedulingInfo(&InstInfo) {
+UltraSparc::UltraSparc()
+ : TargetMachine("UltraSparc-Native"),
+ instrInfo(*this),
+ schedInfo(*this),
+ regInfo(*this),
+ frameInfo(*this),
+ cacheInfo(*this),
+ optInfo(*this)
+{
optSizeForSubWordData = 4;
minMemOpWordSize = 8;
maxAtomicMemOpWordSize = 8;
- zeroRegNum = 0; // %g0 always gives 0 on Sparc
-}
-
-bool UltraSparc::compileMethod(Method *M) {
- if (SelectInstructionsForMethod(M, *this)) {
- cerr << "Instruction selection failed for method " << M->getName()
- << "\n\n";
- return true;
- }
-
- if (ScheduleInstructionsWithSSA(M, *this, InstSchedulingInfo)) {
- cerr << "Instruction scheduling before allocation failed for method "
- << M->getName() << "\n\n";
- return true;
- }
- return false;
}
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