X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FTarget%2FSparcV9%2FSparcV9TargetMachine.cpp;h=28b9734361c159ab7aaefdc83c7390dfd4e9fe34;hb=d344242f2e1e4a2ca272ee140a991141eedaa279;hp=a4556d161d0187a1baa92a18346f9bb995db64dd;hpb=455889aa79e3463a4b0f2161e3d9d72a683268b6;p=oota-llvm.git diff --git a/lib/Target/SparcV9/SparcV9TargetMachine.cpp b/lib/Target/SparcV9/SparcV9TargetMachine.cpp index a4556d161d0..28b9734361c 100644 --- a/lib/Target/SparcV9/SparcV9TargetMachine.cpp +++ b/lib/Target/SparcV9/SparcV9TargetMachine.cpp @@ -1,26 +1,15 @@ -// $Id$ -//*************************************************************************** -// 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 "SparcInternals.h" #include "llvm/Target/Sparc.h" -#include "llvm/CodeGen/InstrScheduling.h" -#include "llvm/CodeGen/InstrSelection.h" -#include "llvm/CodeGen/MachineCodeForInstruction.h" -#include "llvm/CodeGen/MachineCodeForMethod.h" -#include "llvm/CodeGen/RegisterAllocation.h" -#include "llvm/CodeGen/MachineInstr.h" -#include "llvm/Method.h" +#include "llvm/Function.h" #include "llvm/BasicBlock.h" -#include "llvm/PassManager.h" +#include "llvm/CodeGen/MachineCodeForMethod.h" #include using std::cerr; @@ -37,88 +26,10 @@ const MachineInstrDescriptor SparcMachineInstrDesc[] = { // 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 InsertPrologEpilogCode -// -// Insert SAVE/RESTORE instructions for the method -// -// Insert prolog code at the unique method entry point. -// Insert epilog code at each method exit point. -// InsertPrologEpilog invokes these only if the method is not compiled -// with the leaf method optimization. -// -//--------------------------------------------------------------------------- -static MachineInstr* minstrVec[MAX_INSTR_PER_VMINSTR]; - -class InsertPrologEpilogCode : public MethodPass { - TargetMachine &Target; -public: - inline InsertPrologEpilogCode(TargetMachine &T) : Target(T) {} - bool runOnMethod(Method *M) { - MachineCodeForMethod &mcodeInfo = MachineCodeForMethod::get(M); - if (!mcodeInfo.isCompiledAsLeafMethod()) { - InsertPrologCode(M); - InsertEpilogCode(M); - } - return false; - } - - void InsertPrologCode(Method *M); - void InsertEpilogCode(Method *M); -}; - -void InsertPrologEpilogCode::InsertPrologCode(Method* method) -{ - BasicBlock* entryBB = method->getEntryNode(); - unsigned N = GetInstructionsForProlog(entryBB, Target, minstrVec); - assert(N <= MAX_INSTR_PER_VMINSTR); - MachineCodeForBasicBlock& bbMvec = entryBB->getMachineInstrVec(); - bbMvec.insert(bbMvec.begin(), minstrVec, minstrVec+N); -} - - -void InsertPrologEpilogCode::InsertEpilogCode(Method* method) -{ - for (Method::iterator I=method->begin(), E=method->end(); I != E; ++I) { - Instruction *TermInst = (Instruction*)(*I)->getTerminator(); - if (TermInst->getOpcode() == Instruction::Ret) - { - BasicBlock* exitBB = *I; - unsigned N = GetInstructionsForEpilog(exitBB, Target, minstrVec); - - MachineCodeForBasicBlock& bbMvec = exitBB->getMachineInstrVec(); - MachineCodeForInstruction &termMvec = - MachineCodeForInstruction::get(TermInst); - - // Remove the NOPs in the delay slots of the return instruction - const MachineInstrInfo &mii = Target.getInstrInfo(); - unsigned numNOPs = 0; - while (termMvec.back()->getOpCode() == NOP) - { - assert( termMvec.back() == bbMvec.back()); - termMvec.pop_back(); - bbMvec.pop_back(); - ++numNOPs; - } - assert(termMvec.back() == bbMvec.back()); - - // Check that we found the right number of NOPs and have the right - // number of instructions to replace them. - unsigned ndelays = mii.getNumDelaySlots(termMvec.back()->getOpCode()); - assert(numNOPs == ndelays && "Missing NOPs in delay slots?"); - assert(N == ndelays && "Cannot use epilog code for delay slots?"); - - // Append the epilog code to the end of the basic block. - bbMvec.push_back(minstrVec[0]); - } - } -} - //--------------------------------------------------------------------------- // class UltraSparcFrameInfo @@ -141,10 +52,10 @@ int UltraSparcFrameInfo::getRegSpillAreaOffset(MachineCodeForMethod& mcInfo, bool& pos) const { + mcInfo.freezeAutomaticVarsArea(); // ensure no more auto vars are added + pos = false; // static stack area grows downwards unsigned int autoVarsSize = mcInfo.getAutomaticVarsSize(); - if (int mod = autoVarsSize % getStackFrameSizeAlignment()) - autoVarsSize += (getStackFrameSizeAlignment() - mod); return StaticAreaOffsetFromFP - autoVarsSize; } @@ -152,12 +63,13 @@ int UltraSparcFrameInfo::getTmpAreaOffset(MachineCodeForMethod& mcInfo, bool& pos) const { + mcInfo.freezeAutomaticVarsArea(); // ensure no more auto vars are added + mcInfo.freezeSpillsArea(); // ensure no more spill slots are added + pos = false; // static stack area grows downwards unsigned int autoVarsSize = mcInfo.getAutomaticVarsSize(); unsigned int spillAreaSize = mcInfo.getRegSpillsSize(); int offset = autoVarsSize + spillAreaSize; - if (int mod = offset % getStackFrameSizeAlignment()) - offset += (getStackFrameSizeAlignment() - mod); return StaticAreaOffsetFromFP - offset; } @@ -165,10 +77,16 @@ int UltraSparcFrameInfo::getDynamicAreaOffset(MachineCodeForMethod& mcInfo, bool& pos) const { - // dynamic stack area grows downwards starting at top of opt-args area + // 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 % getStackFrameSizeAlignment() == 0); + assert((offset - OFFSET) % getStackFrameSizeAlignment() == 0); return offset; } @@ -190,93 +108,11 @@ UltraSparc::UltraSparc() schedInfo(*this), regInfo(*this), frameInfo(*this), - cacheInfo(*this) + cacheInfo(*this), + optInfo(*this) { optSizeForSubWordData = 4; minMemOpWordSize = 8; maxAtomicMemOpWordSize = 8; } - - -//===---------------------------------------------------------------------===// -// GenerateCodeForTarget Pass -// -// Native code generation for a specified target. -//===---------------------------------------------------------------------===// - -class ConstructMachineCodeForMethod : public MethodPass { - TargetMachine &Target; -public: - inline ConstructMachineCodeForMethod(TargetMachine &T) : Target(T) {} - bool runOnMethod(Method *M) { - MachineCodeForMethod::construct(M, Target); - return false; - } -}; - -class InstructionSelection : public MethodPass { - TargetMachine &Target; -public: - inline InstructionSelection(TargetMachine &T) : Target(T) {} - bool runOnMethod(Method *M) { - if (SelectInstructionsForMethod(M, Target)) - cerr << "Instr selection failed for method " << M->getName() << "\n"; - return false; - } -}; - -struct FreeMachineCodeForMethod : public MethodPass { - static void freeMachineCode(Instruction *I) { - MachineCodeForInstruction::destroy(I); - } - - bool runOnMethod(Method *M) { - for (Method::iterator MI = M->begin(), ME = M->end(); MI != ME; ++MI) - for (BasicBlock::iterator I = (*MI)->begin(), E = (*MI)->end(); - I != E; ++I) - freeMachineCode(*I); - - // Don't destruct MachineCodeForMethod - The global printer needs it - //MachineCodeForMethod::destruct(M); - return false; - } -}; - - - -// addPassesToEmitAssembly - This method controls the entire code generation -// process for the ultra sparc. -// -void UltraSparc::addPassesToEmitAssembly(PassManager &PM, std::ostream &Out) { - // Construct and initialize the MachineCodeForMethod object for this method. - PM.add(new ConstructMachineCodeForMethod(*this)); - - PM.add(new InstructionSelection(*this)); - - //PM.add(createInstructionSchedulingWithSSAPass(*this)); - - PM.add(getRegisterAllocator(*this)); - - //PM.add(new OptimizeLeafProcedures()); - //PM.add(new DeleteFallThroughBranches()); - //PM.add(new RemoveChainedBranches()); // should be folded with previous - //PM.add(new RemoveRedundantOps()); // operations with %g0, NOP, etc. - - PM.add(new InsertPrologEpilogCode(*this)); - - // Output assembly language to the .s file. Assembly emission is split into - // two parts: Method output and Global value output. This is because method - // output is pipelined with all of the rest of code generation stuff, - // allowing machine code representations for methods to be free'd after the - // method has been emitted. - // - PM.add(getMethodAsmPrinterPass(PM, Out)); - PM.add(new FreeMachineCodeForMethod()); // Free stuff no longer needed - - // Emit Module level assembly after all of the methods have been processed. - PM.add(getModuleAsmPrinterPass(PM, Out)); - - // Emit bytecode to the sparc assembly file into its special section next - PM.add(getEmitBytecodeToAsmPass(Out)); -}