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https://github.com/RPCS3/llvm-mirror.git
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* Codegen of GEPs dramatically improved by folding multiplies and adds
* Function pointers implemented correctly using appropriate stubs Contributed by Nate Begeman. llvm-svn: 15133
This commit is contained in:
Misha Brukman
parent
940e80d54e
commit
ef73e28236
@ -19,6 +19,7 @@
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#define DEBUG_TYPE "asmprinter"
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#include "PowerPC.h"
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#include "PowerPCInstrInfo.h"
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#include "PowerPCTargetMachine.h"
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#include "llvm/Constants.h"
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#include "llvm/DerivedTypes.h"
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#include "llvm/Module.h"
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@ -47,7 +48,7 @@ namespace {
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/// Target machine description which we query for reg. names, data
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/// layout, etc.
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///
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TargetMachine &TM;
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PowerPCTargetMachine &TM;
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/// Name-mangler for global names.
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///
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@ -55,8 +56,8 @@ namespace {
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std::set<std::string> FnStubs, GVStubs, LinkOnceStubs;
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std::set<std::string> Strings;
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Printer(std::ostream &o, TargetMachine &tm) : O(o), TM(tm), labelNumber(0)
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{ }
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Printer(std::ostream &o, TargetMachine &tm) : O(o),
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TM(reinterpret_cast<PowerPCTargetMachine&>(tm)), labelNumber(0) { }
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/// Cache of mangled name for current function. This is
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/// recalculated at the beginning of each call to
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@ -131,7 +132,7 @@ static void printAsCString(std::ostream &O, const ConstantArray *CVA) {
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} else if (isprint(C)) {
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O << C;
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} else {
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switch(C) {
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switch (C) {
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case '\b': O << "\\b"; break;
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case '\f': O << "\\f"; break;
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case '\n': O << "\\n"; break;
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@ -167,7 +168,7 @@ void Printer::emitConstantValueOnly(const Constant *CV) {
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O << Mang->getValueName(GV);
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else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV)) {
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const TargetData &TD = TM.getTargetData();
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switch(CE->getOpcode()) {
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switch (CE->getOpcode()) {
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case Instruction::GetElementPtr: {
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// generate a symbolic expression for the byte address
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const Constant *ptrVal = CE->getOperand(0);
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@ -450,20 +451,25 @@ void Printer::printOp(const MachineOperand &MO,
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if (!elideOffsetKeyword) {
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GlobalValue *GV = MO.getGlobal();
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std::string Name = Mang->getValueName(GV);
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// Dynamically-resolved functions need a stub for the function
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Function *F = dyn_cast<Function>(GV);
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if (F && F->isExternal()) {
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if (F && F->isExternal() &&
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TM.CalledFunctions.find(F) != TM.CalledFunctions.end()) {
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FnStubs.insert(Name);
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O << "L" << Name << "$stub";
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} else {
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GlobalVariable *GVar = dyn_cast<GlobalVariable>(GV);
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// External global variables need a non-lazily-resolved stub
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if (GVar && GVar->isExternal()) {
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GVStubs.insert(Name);
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O << "L" << Name << "$non_lazy_ptr";
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} else
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O << Mang->getValueName(GV);
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return;
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}
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// External global variables need a non-lazily-resolved stub
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if (GV->hasInternalLinkage() == false &&
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TM.AddressTaken.find(GV) != TM.AddressTaken.end()) {
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GVStubs.insert(Name);
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O << "L" << Name << "$non_lazy_ptr";
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return;
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}
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O << Mang->getValueName(GV);
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}
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return;
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@ -613,10 +619,10 @@ bool Printer::doFinalization(Module &M) {
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(I->hasInternalLinkage() || I->hasWeakLinkage())) {
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SwitchSection(O, CurSection, ".data");
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if (I->hasInternalLinkage())
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O << "\t.lcomm " << name << "," << TD.getTypeSize(C->getType())
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O << ".lcomm " << name << "," << TD.getTypeSize(C->getType())
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<< "," << (unsigned)TD.getTypeAlignment(C->getType());
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else
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O << "\t.comm " << name << "," << TD.getTypeSize(C->getType());
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O << ".comm " << name << "," << TD.getTypeSize(C->getType());
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O << "\t\t; ";
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WriteAsOperand(O, I, true, true, &M);
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O << "\n";
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@ -661,8 +667,7 @@ bool Printer::doFinalization(Module &M) {
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if (LinkOnceStubs.begin() != LinkOnceStubs.end())
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O << ".data\n.align 2\n";
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for (std::set<std::string>::iterator i = LinkOnceStubs.begin(),
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e = LinkOnceStubs.end(); i != e; ++i)
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{
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e = LinkOnceStubs.end(); i != e; ++i) {
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O << *i << "$non_lazy_ptr:\n"
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<< "\t.long\t" << *i << '\n';
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}
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@ -671,31 +676,32 @@ bool Printer::doFinalization(Module &M) {
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for (std::set<std::string>::iterator i = FnStubs.begin(), e = FnStubs.end();
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i != e; ++i)
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{
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O << "\t.picsymbol_stub\n";
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O << ".data\n";
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O << ".section __TEXT,__picsymbolstub1,symbol_stubs,pure_instructions,32\n";
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O << "\t.align 2\n";
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O << "L" << *i << "$stub:\n";
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O << "\t.indirect_symbol " << *i << "\n";
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O << "\tmflr r0\n";
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O << "\tbl L0$" << *i << "\n";
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O << "\tbcl 20,31,L0$" << *i << "\n";
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O << "L0$" << *i << ":\n";
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O << "\tmflr r11\n";
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O << "\taddis r11,r11,ha16(L" << *i << "$lazy_ptr-L0$" << *i << ")\n";
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O << "\tmtlr r0\n";
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O << "\tlwz r12,lo16(L" << *i << "$lazy_ptr-L0$" << *i << ")(r11)\n";
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O << "\tlwzu r12,lo16(L" << *i << "$lazy_ptr-L0$" << *i << ")(r11)\n";
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O << "\tmtctr r12\n";
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O << "\taddi r11,r11,lo16(L" << *i << "$lazy_ptr - L0$" << *i << ")\n";
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O << "\tbctr\n";
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O << ".data\n";
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O << ".lazy_symbol_pointer\n";
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O << "L" << *i << "$lazy_ptr:\n";
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O << ".indirect_symbol " << *i << "\n";
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O << ".long dyld_stub_binding_helper\n";
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O << "\t.indirect_symbol " << *i << "\n";
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O << "\t.long dyld_stub_binding_helper\n";
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}
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O << "\n";
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// Output stubs for external global variables
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if (GVStubs.begin() != GVStubs.end())
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O << ".data\n\t.non_lazy_symbol_pointer\n";
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O << ".data\n.non_lazy_symbol_pointer\n";
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for (std::set<std::string>::iterator i = GVStubs.begin(), e = GVStubs.end();
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i != e; ++i) {
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O << "L" << *i << "$non_lazy_ptr:\n";
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@ -11,6 +11,7 @@
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#include "PowerPC.h"
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#include "PowerPCInstrBuilder.h"
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#include "PowerPCInstrInfo.h"
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#include "PowerPCTargetMachine.h"
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#include "llvm/Constants.h"
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#include "llvm/DerivedTypes.h"
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#include "llvm/Function.h"
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@ -26,17 +27,31 @@
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#include "llvm/Support/GetElementPtrTypeIterator.h"
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#include "llvm/Support/InstVisitor.h"
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#include "Support/Debug.h"
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#include "Support/Statistic.h"
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#include <vector>
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#include <iostream>
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using namespace llvm;
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namespace {
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Statistic<> GEPConsts("ppc-codegen", "Number of const GEPs");
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Statistic<> GEPSplits("ppc-codegen", "Number of partially const GEPs");
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/// TypeClass - Used by the PowerPC backend to group LLVM types by their basic
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/// PPC Representation.
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///
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enum TypeClass {
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cByte, cShort, cInt, cFP32, cFP64, cLong
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};
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// This struct is for recording the necessary operations to emit the GEP
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typedef struct CollapsedGepOp {
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public:
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CollapsedGepOp(bool mul, Value *i, ConstantSInt *s) :
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isMul(mul), index(i), size(s) {}
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bool isMul;
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Value *index;
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ConstantSInt *size;
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} CollapsedGepOp;
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}
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/// getClass - Turn a primitive type into a "class" number which is based on the
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@ -71,7 +86,7 @@ static inline TypeClass getClassB(const Type *Ty) {
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namespace {
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struct ISel : public FunctionPass, InstVisitor<ISel> {
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TargetMachine &TM;
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PowerPCTargetMachine &TM;
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MachineFunction *F; // The function we are compiling into
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MachineBasicBlock *BB; // The current MBB we are compiling
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int VarArgsFrameIndex; // FrameIndex for start of varargs area
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@ -90,7 +105,8 @@ namespace {
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// FrameIndex for the alloca.
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std::map<AllocaInst*, unsigned> AllocaMap;
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ISel(TargetMachine &tm) : TM(tm), F(0), BB(0) {}
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ISel(TargetMachine &tm) : TM(reinterpret_cast<PowerPCTargetMachine&>(tm)),
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F(0), BB(0) {}
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bool doInitialization(Module &M) {
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// Add external functions that we may call
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@ -582,6 +598,9 @@ void ISel::copyConstantToRegister(MachineBasicBlock *MBB,
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BuildMI(*MBB, IP, PPC32::LOADHiAddr, 2, TmpReg).addReg(CurPC)
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.addGlobalAddress(GV);
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BuildMI(*MBB, IP, Opcode, 2, R).addReg(TmpReg).addGlobalAddress(GV);
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// Add the GV to the list of things whose addresses have been taken.
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TM.AddressTaken.insert(GV);
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} else {
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std::cerr << "Offending constant: " << *C << "\n";
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assert(0 && "Type not handled yet!");
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@ -1044,7 +1063,7 @@ void ISel::visitSetCondInst(SetCondInst &I) {
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// %TrueValue = li 1
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// b sinkMBB
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BB = copy1MBB;
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unsigned TrueValue = makeAnotherReg (I.getType ());
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unsigned TrueValue = makeAnotherReg(I.getType());
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BuildMI(BB, PPC32::LI, 1, TrueValue).addSImm(1);
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BuildMI(BB, PPC32::B, 1).addMBB(sinkMBB);
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// Update machine-CFG edges
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@ -1262,9 +1281,9 @@ static inline BasicBlock *getBlockAfter(BasicBlock *BB) {
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///
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void ISel::visitBranchInst(BranchInst &BI) {
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// Update machine-CFG edges
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BB->addSuccessor (MBBMap[BI.getSuccessor(0)]);
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BB->addSuccessor(MBBMap[BI.getSuccessor(0)]);
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if (BI.isConditional())
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BB->addSuccessor (MBBMap[BI.getSuccessor(1)]);
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BB->addSuccessor(MBBMap[BI.getSuccessor(1)]);
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BasicBlock *NextBB = getBlockAfter(BI.getParent()); // BB after current one
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@ -1524,9 +1543,10 @@ void ISel::visitCallInst(CallInst &CI) {
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visitIntrinsicCall(ID, CI); // Special intrinsics are not handled here
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return;
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}
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// Emit a CALL instruction with PC-relative displacement.
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TheCall = BuildMI(PPC32::CALLpcrel, 1).addGlobalAddress(F, true);
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// Add it to the set of functions called to be used by the Printer
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TM.CalledFunctions.insert(F);
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} else { // Emit an indirect call through the CTR
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unsigned Reg = getReg(CI.getCalledValue());
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BuildMI(BB, PPC32::MTCTR, 1).addReg(Reg);
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@ -2084,6 +2104,7 @@ void ISel::emitDivRemOperation(MachineBasicBlock *BB,
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Args.push_back(ValueRecord(Op0Reg, Type::FloatTy));
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Args.push_back(ValueRecord(Op1Reg, Type::FloatTy));
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doCall(ValueRecord(ResultReg, Type::FloatTy), TheCall, Args, false);
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TM.CalledFunctions.insert(fmodfFn);
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}
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return;
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case cFP64:
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@ -2101,6 +2122,7 @@ void ISel::emitDivRemOperation(MachineBasicBlock *BB,
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Args.push_back(ValueRecord(Op0Reg, Type::DoubleTy));
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Args.push_back(ValueRecord(Op1Reg, Type::DoubleTy));
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doCall(ValueRecord(ResultReg, Type::DoubleTy), TheCall, Args, false);
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TM.CalledFunctions.insert(fmodFn);
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}
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return;
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case cLong: {
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@ -2116,6 +2138,7 @@ void ISel::emitDivRemOperation(MachineBasicBlock *BB,
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Args.push_back(ValueRecord(Op0Reg, Type::LongTy));
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Args.push_back(ValueRecord(Op1Reg, Type::LongTy));
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doCall(ValueRecord(ResultReg, Type::LongTy), TheCall, Args, false);
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TM.CalledFunctions.insert(Funcs[NameIdx]);
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return;
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}
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case cByte: case cShort: case cInt:
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@ -2175,10 +2198,10 @@ void ISel::emitDivRemOperation(MachineBasicBlock *BB,
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/// because the shift amount has to be in CL, not just any old register.
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///
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void ISel::visitShiftInst(ShiftInst &I) {
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MachineBasicBlock::iterator IP = BB->end ();
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emitShiftOperation(BB, IP, I.getOperand (0), I.getOperand (1),
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I.getOpcode () == Instruction::Shl, I.getType (),
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getReg (I));
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MachineBasicBlock::iterator IP = BB->end();
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emitShiftOperation(BB, IP, I.getOperand(0), I.getOperand(1),
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I.getOpcode() == Instruction::Shl, I.getType(),
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getReg(I));
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}
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/// emitShiftOperation - Common code shared between visitShiftInst and
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@ -2272,7 +2295,7 @@ void ISel::emitShiftOperation(MachineBasicBlock *MBB,
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if (isSigned) {
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// FIXME: Unimplemented
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// Page C-3 of the PowerPC 32bit Programming Environments Manual
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std::cerr << "Unimplemented: signed right shift\n";
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std::cerr << "ERROR: Unimplemented: signed right shift\n";
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abort();
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} else {
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BuildMI(*MBB, IP, PPC32::SUBFIC, 2, TmpReg1).addReg(ShiftAmountReg)
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@ -2527,17 +2550,17 @@ void ISel::emitCastOperation(MachineBasicBlock *MBB,
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}
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// Handle cast of LARGER int to SMALLER int with a clear or sign extend
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if ((SrcClass <= cInt || SrcClass == cLong) && DestClass <= cInt
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&& SrcClass > DestClass) {
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if ((SrcClass <= cInt || SrcClass == cLong) && DestClass <= cInt &&
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SrcClass > DestClass) {
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bool isUnsigned = DestTy->isUnsigned() || DestTy == Type::BoolTy;
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unsigned source = (SrcClass == cLong) ? SrcReg+1 : SrcReg;
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if (isUnsigned) {
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unsigned shift = (SrcClass == cByte) ? 24 : 16;
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unsigned shift = (DestClass == cByte) ? 24 : 16;
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BuildMI(*BB, IP, PPC32::RLWINM, 4, DestReg).addReg(source).addZImm(0)
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.addImm(shift).addImm(31);
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} else {
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BuildMI(*BB, IP, (SrcClass == cByte) ? PPC32::EXTSB : PPC32::EXTSH, 1,
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BuildMI(*BB, IP, (DestClass == cByte) ? PPC32::EXTSB : PPC32::EXTSH, 1,
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DestReg).addReg(source);
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}
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return;
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@ -2554,6 +2577,7 @@ void ISel::emitCastOperation(MachineBasicBlock *MBB,
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MachineInstr *TheCall =
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BuildMI(PPC32::CALLpcrel, 1).addGlobalAddress(floatFn, true);
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doCall(ValueRecord(DestReg, DestTy), TheCall, Args, false);
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TM.CalledFunctions.insert(floatFn);
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return;
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}
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@ -2621,6 +2645,7 @@ void ISel::emitCastOperation(MachineBasicBlock *MBB,
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MachineInstr *TheCall =
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BuildMI(PPC32::CALLpcrel, 1).addGlobalAddress(floatFn, true);
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doCall(ValueRecord(DestReg, DestTy), TheCall, Args, false);
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TM.CalledFunctions.insert(floatFn);
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return;
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}
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@ -2729,13 +2754,18 @@ void ISel::emitGEPOperation(MachineBasicBlock *MBB,
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const TargetData &TD = TM.getTargetData();
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const Type *Ty = Src->getType();
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unsigned basePtrReg = getReg(Src, MBB, IP);
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int64_t constValue = 0;
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bool anyCombined = false;
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// Record the operations to emit the GEP in a vector so that we can emit them
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// after having analyzed the entire instruction.
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std::vector<CollapsedGepOp*> ops;
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// GEPs have zero or more indices; we must perform a struct access
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// or array access for each one.
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for (GetElementPtrInst::op_iterator oi = IdxBegin, oe = IdxEnd; oi != oe;
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++oi) {
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Value *idx = *oi;
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unsigned nextBasePtrReg = makeAnotherReg(Type::UIntTy);
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if (const StructType *StTy = dyn_cast<StructType>(Ty)) {
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// It's a struct access. idx is the index into the structure,
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// which names the field. Use the TargetData structure to
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@ -2746,17 +2776,16 @@ void ISel::emitGEPOperation(MachineBasicBlock *MBB,
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unsigned fieldIndex = cast<ConstantUInt>(idx)->getValue();
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unsigned memberOffset =
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TD.getStructLayout(StTy)->MemberOffsets[fieldIndex];
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if (0 == memberOffset) { // No-op
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nextBasePtrReg = basePtrReg;
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} else {
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// Emit an ADDI to add memberOffset to the basePtr.
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BuildMI (*MBB, IP, PPC32::ADDI, 2, nextBasePtrReg).addReg(basePtrReg)
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.addSImm(memberOffset);
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}
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// The next type is the member of the structure selected by the index.
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Ty = StTy->getElementType(fieldIndex);
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} else if (const SequentialType *SqTy = dyn_cast<SequentialType>(Ty)) {
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if (constValue != 0) anyCombined = true;
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// StructType member offsets are always constant values. Add it to the
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// running total.
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constValue += memberOffset;
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// The next type is the member of the structure selected by the
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// index.
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Ty = StTy->getElementType (fieldIndex);
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} else if (const SequentialType *SqTy = dyn_cast<SequentialType> (Ty)) {
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// Many GEP instructions use a [cast (int/uint) to LongTy] as their
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// operand. Handle this case directly now...
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if (CastInst *CI = dyn_cast<CastInst>(idx))
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@ -2764,39 +2793,91 @@ void ISel::emitGEPOperation(MachineBasicBlock *MBB,
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CI->getOperand(0)->getType() == Type::UIntTy)
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idx = CI->getOperand(0);
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// It's an array or pointer access: [ArraySize x ElementType].
|
||||
// We want to add basePtrReg to (idxReg * sizeof ElementType). First, we
|
||||
// must find the size of the pointed-to type (Not coincidentally, the next
|
||||
// type is the type of the elements in the array).
|
||||
Ty = SqTy->getElementType();
|
||||
unsigned elementSize = TD.getTypeSize(Ty);
|
||||
|
||||
if (idx == Constant::getNullValue(idx->getType())) { // No-op
|
||||
nextBasePtrReg = basePtrReg;
|
||||
} else if (elementSize == 1) {
|
||||
// If the element size is 1, we don't have to multiply, just add
|
||||
unsigned idxReg = getReg(idx, MBB, IP);
|
||||
BuildMI(*MBB, IP, PPC32::ADD, 2, nextBasePtrReg).addReg(basePtrReg)
|
||||
.addReg(idxReg);
|
||||
} else {
|
||||
// It's an array or pointer access: [ArraySize x ElementType].
|
||||
// We want to add basePtrReg to (idxReg * sizeof ElementType). First, we
|
||||
// must find the size of the pointed-to type (Not coincidentally, the
|
||||
// next type is the type of the elements in the array).
|
||||
unsigned OffsetReg = makeAnotherReg(idx->getType());
|
||||
ConstantUInt *CUI = ConstantUInt::get(Type::UIntTy, elementSize);
|
||||
doMultiplyConst(MBB, IP, OffsetReg, idx, CUI);
|
||||
if (ConstantInt *C = dyn_cast<ConstantInt>(idx)) {
|
||||
if (constValue != 0) anyCombined = true;
|
||||
|
||||
// Deal with long indices
|
||||
if (getClass(idx->getType()) == cLong) ++OffsetReg;
|
||||
|
||||
// Emit an ADD to add OffsetReg to the basePtr.
|
||||
BuildMI (*MBB, IP, PPC32::ADD, 2, nextBasePtrReg).addReg(basePtrReg)
|
||||
.addReg(OffsetReg);
|
||||
if (ConstantSInt *CS = dyn_cast<ConstantSInt>(C))
|
||||
constValue += CS->getValue() * elementSize;
|
||||
else if (ConstantUInt *CU = dyn_cast<ConstantUInt>(C))
|
||||
constValue += CU->getValue() * elementSize;
|
||||
else
|
||||
assert(0 && "Invalid ConstantInt GEP index type!");
|
||||
} else {
|
||||
// Push current gep state to this point as an add
|
||||
CollapsedGepOp *addition =
|
||||
new CollapsedGepOp(false, 0, ConstantSInt::get(Type::IntTy,
|
||||
constValue));
|
||||
ops.push_back(addition);
|
||||
|
||||
// Push multiply gep op and reset constant value
|
||||
CollapsedGepOp *multiply =
|
||||
new CollapsedGepOp(true, idx, ConstantSInt::get(Type::IntTy,
|
||||
elementSize));
|
||||
ops.push_back(multiply);
|
||||
|
||||
constValue = 0;
|
||||
}
|
||||
}
|
||||
}
|
||||
// Do some statistical accounting
|
||||
if (ops.empty())
|
||||
++GEPConsts;
|
||||
|
||||
if (anyCombined)
|
||||
++GEPSplits;
|
||||
|
||||
// Emit instructions for all the collapsed ops
|
||||
for(std::vector<CollapsedGepOp *>::iterator cgo_i = ops.begin(),
|
||||
cgo_e = ops.end(); cgo_i != cgo_e; ++cgo_i) {
|
||||
CollapsedGepOp *cgo = *cgo_i;
|
||||
unsigned nextBasePtrReg = makeAnotherReg (Type::IntTy);
|
||||
|
||||
if (cgo->isMul) {
|
||||
// We know the elementSize is a constant, so we can emit a constant mul
|
||||
// and then add it to the current base reg
|
||||
unsigned TmpReg = makeAnotherReg(Type::IntTy);
|
||||
doMultiplyConst(MBB, IP, TmpReg, cgo->index, cgo->size);
|
||||
BuildMI(*MBB, IP, PPC32::ADD, 2, nextBasePtrReg).addReg(basePtrReg)
|
||||
.addReg(TmpReg);
|
||||
} else {
|
||||
// Try and generate an immediate addition if possible
|
||||
if (cgo->size->isNullValue()) {
|
||||
BuildMI(*MBB, IP, PPC32::OR, 2, nextBasePtrReg).addReg(basePtrReg)
|
||||
.addReg(basePtrReg);
|
||||
} else if (canUseAsImmediateForOpcode(cgo->size, 0)) {
|
||||
BuildMI(*MBB, IP, PPC32::ADDI, 2, nextBasePtrReg).addReg(basePtrReg)
|
||||
.addSImm(cgo->size->getValue());
|
||||
} else {
|
||||
unsigned Op1r = getReg(cgo->size, MBB, IP);
|
||||
BuildMI(*MBB, IP, PPC32::ADD, 2, nextBasePtrReg).addReg(basePtrReg)
|
||||
.addReg(Op1r);
|
||||
}
|
||||
}
|
||||
|
||||
basePtrReg = nextBasePtrReg;
|
||||
}
|
||||
// Add the current base register plus any accumulated constant value
|
||||
ConstantSInt *remainder = ConstantSInt::get(Type::IntTy, constValue);
|
||||
|
||||
// After we have processed all the indices, the result is left in
|
||||
// basePtrReg. Move it to the register where we were expected to
|
||||
// put the answer.
|
||||
BuildMI(BB, PPC32::OR, 2, TargetReg).addReg(basePtrReg).addReg(basePtrReg);
|
||||
if (remainder->isNullValue()) {
|
||||
BuildMI (BB, PPC32::OR, 2, TargetReg).addReg(basePtrReg).addReg(basePtrReg);
|
||||
} else if (canUseAsImmediateForOpcode(remainder, 0)) {
|
||||
BuildMI(*MBB, IP, PPC32::ADDI, 2, TargetReg).addReg(basePtrReg)
|
||||
.addSImm(remainder->getValue());
|
||||
} else {
|
||||
unsigned Op1r = getReg(remainder, MBB, IP);
|
||||
BuildMI(*MBB, IP, PPC32::ADD, 2, TargetReg).addReg(basePtrReg).addReg(Op1r);
|
||||
}
|
||||
}
|
||||
|
||||
/// visitAllocaInst - If this is a fixed size alloca, allocate space from the
|
||||
@ -2863,6 +2944,7 @@ void ISel::visitMallocInst(MallocInst &I) {
|
||||
MachineInstr *TheCall =
|
||||
BuildMI(PPC32::CALLpcrel, 1).addGlobalAddress(mallocFn, true);
|
||||
doCall(ValueRecord(getReg(I), I.getType()), TheCall, Args, false);
|
||||
TM.CalledFunctions.insert(mallocFn);
|
||||
}
|
||||
|
||||
|
||||
@ -2875,6 +2957,7 @@ void ISel::visitFreeInst(FreeInst &I) {
|
||||
MachineInstr *TheCall =
|
||||
BuildMI(PPC32::CALLpcrel, 1).addGlobalAddress(freeFn, true);
|
||||
doCall(ValueRecord(0, Type::VoidTy), TheCall, Args, false);
|
||||
TM.CalledFunctions.insert(freeFn);
|
||||
}
|
||||
|
||||
/// createPPC32SimpleInstructionSelector - This pass converts an LLVM function
|
||||
|
||||
@ -19,6 +19,7 @@
|
||||
#define DEBUG_TYPE "asmprinter"
|
||||
#include "PowerPC.h"
|
||||
#include "PowerPCInstrInfo.h"
|
||||
#include "PowerPCTargetMachine.h"
|
||||
#include "llvm/Constants.h"
|
||||
#include "llvm/DerivedTypes.h"
|
||||
#include "llvm/Module.h"
|
||||
@ -47,7 +48,7 @@ namespace {
|
||||
/// Target machine description which we query for reg. names, data
|
||||
/// layout, etc.
|
||||
///
|
||||
TargetMachine &TM;
|
||||
PowerPCTargetMachine &TM;
|
||||
|
||||
/// Name-mangler for global names.
|
||||
///
|
||||
@ -55,8 +56,8 @@ namespace {
|
||||
std::set<std::string> FnStubs, GVStubs, LinkOnceStubs;
|
||||
std::set<std::string> Strings;
|
||||
|
||||
Printer(std::ostream &o, TargetMachine &tm) : O(o), TM(tm), labelNumber(0)
|
||||
{ }
|
||||
Printer(std::ostream &o, TargetMachine &tm) : O(o),
|
||||
TM(reinterpret_cast<PowerPCTargetMachine&>(tm)), labelNumber(0) { }
|
||||
|
||||
/// Cache of mangled name for current function. This is
|
||||
/// recalculated at the beginning of each call to
|
||||
@ -131,7 +132,7 @@ static void printAsCString(std::ostream &O, const ConstantArray *CVA) {
|
||||
} else if (isprint(C)) {
|
||||
O << C;
|
||||
} else {
|
||||
switch(C) {
|
||||
switch (C) {
|
||||
case '\b': O << "\\b"; break;
|
||||
case '\f': O << "\\f"; break;
|
||||
case '\n': O << "\\n"; break;
|
||||
@ -167,7 +168,7 @@ void Printer::emitConstantValueOnly(const Constant *CV) {
|
||||
O << Mang->getValueName(GV);
|
||||
else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV)) {
|
||||
const TargetData &TD = TM.getTargetData();
|
||||
switch(CE->getOpcode()) {
|
||||
switch (CE->getOpcode()) {
|
||||
case Instruction::GetElementPtr: {
|
||||
// generate a symbolic expression for the byte address
|
||||
const Constant *ptrVal = CE->getOperand(0);
|
||||
@ -450,20 +451,25 @@ void Printer::printOp(const MachineOperand &MO,
|
||||
if (!elideOffsetKeyword) {
|
||||
GlobalValue *GV = MO.getGlobal();
|
||||
std::string Name = Mang->getValueName(GV);
|
||||
|
||||
// Dynamically-resolved functions need a stub for the function
|
||||
Function *F = dyn_cast<Function>(GV);
|
||||
if (F && F->isExternal()) {
|
||||
if (F && F->isExternal() &&
|
||||
TM.CalledFunctions.find(F) != TM.CalledFunctions.end()) {
|
||||
FnStubs.insert(Name);
|
||||
O << "L" << Name << "$stub";
|
||||
} else {
|
||||
GlobalVariable *GVar = dyn_cast<GlobalVariable>(GV);
|
||||
// External global variables need a non-lazily-resolved stub
|
||||
if (GVar && GVar->isExternal()) {
|
||||
GVStubs.insert(Name);
|
||||
O << "L" << Name << "$non_lazy_ptr";
|
||||
} else
|
||||
O << Mang->getValueName(GV);
|
||||
return;
|
||||
}
|
||||
|
||||
// External global variables need a non-lazily-resolved stub
|
||||
if (GV->hasInternalLinkage() == false &&
|
||||
TM.AddressTaken.find(GV) != TM.AddressTaken.end()) {
|
||||
GVStubs.insert(Name);
|
||||
O << "L" << Name << "$non_lazy_ptr";
|
||||
return;
|
||||
}
|
||||
|
||||
O << Mang->getValueName(GV);
|
||||
}
|
||||
return;
|
||||
|
||||
@ -613,10 +619,10 @@ bool Printer::doFinalization(Module &M) {
|
||||
(I->hasInternalLinkage() || I->hasWeakLinkage())) {
|
||||
SwitchSection(O, CurSection, ".data");
|
||||
if (I->hasInternalLinkage())
|
||||
O << "\t.lcomm " << name << "," << TD.getTypeSize(C->getType())
|
||||
O << ".lcomm " << name << "," << TD.getTypeSize(C->getType())
|
||||
<< "," << (unsigned)TD.getTypeAlignment(C->getType());
|
||||
else
|
||||
O << "\t.comm " << name << "," << TD.getTypeSize(C->getType());
|
||||
O << ".comm " << name << "," << TD.getTypeSize(C->getType());
|
||||
O << "\t\t; ";
|
||||
WriteAsOperand(O, I, true, true, &M);
|
||||
O << "\n";
|
||||
@ -661,8 +667,7 @@ bool Printer::doFinalization(Module &M) {
|
||||
if (LinkOnceStubs.begin() != LinkOnceStubs.end())
|
||||
O << ".data\n.align 2\n";
|
||||
for (std::set<std::string>::iterator i = LinkOnceStubs.begin(),
|
||||
e = LinkOnceStubs.end(); i != e; ++i)
|
||||
{
|
||||
e = LinkOnceStubs.end(); i != e; ++i) {
|
||||
O << *i << "$non_lazy_ptr:\n"
|
||||
<< "\t.long\t" << *i << '\n';
|
||||
}
|
||||
@ -671,31 +676,32 @@ bool Printer::doFinalization(Module &M) {
|
||||
for (std::set<std::string>::iterator i = FnStubs.begin(), e = FnStubs.end();
|
||||
i != e; ++i)
|
||||
{
|
||||
O << "\t.picsymbol_stub\n";
|
||||
O << ".data\n";
|
||||
O << ".section __TEXT,__picsymbolstub1,symbol_stubs,pure_instructions,32\n";
|
||||
O << "\t.align 2\n";
|
||||
O << "L" << *i << "$stub:\n";
|
||||
O << "\t.indirect_symbol " << *i << "\n";
|
||||
O << "\tmflr r0\n";
|
||||
O << "\tbl L0$" << *i << "\n";
|
||||
O << "\tbcl 20,31,L0$" << *i << "\n";
|
||||
O << "L0$" << *i << ":\n";
|
||||
O << "\tmflr r11\n";
|
||||
O << "\taddis r11,r11,ha16(L" << *i << "$lazy_ptr-L0$" << *i << ")\n";
|
||||
O << "\tmtlr r0\n";
|
||||
O << "\tlwz r12,lo16(L" << *i << "$lazy_ptr-L0$" << *i << ")(r11)\n";
|
||||
O << "\tlwzu r12,lo16(L" << *i << "$lazy_ptr-L0$" << *i << ")(r11)\n";
|
||||
O << "\tmtctr r12\n";
|
||||
O << "\taddi r11,r11,lo16(L" << *i << "$lazy_ptr - L0$" << *i << ")\n";
|
||||
O << "\tbctr\n";
|
||||
O << ".data\n";
|
||||
O << ".lazy_symbol_pointer\n";
|
||||
O << "L" << *i << "$lazy_ptr:\n";
|
||||
O << ".indirect_symbol " << *i << "\n";
|
||||
O << ".long dyld_stub_binding_helper\n";
|
||||
O << "\t.indirect_symbol " << *i << "\n";
|
||||
O << "\t.long dyld_stub_binding_helper\n";
|
||||
}
|
||||
|
||||
O << "\n";
|
||||
|
||||
// Output stubs for external global variables
|
||||
if (GVStubs.begin() != GVStubs.end())
|
||||
O << ".data\n\t.non_lazy_symbol_pointer\n";
|
||||
O << ".data\n.non_lazy_symbol_pointer\n";
|
||||
for (std::set<std::string>::iterator i = GVStubs.begin(), e = GVStubs.end();
|
||||
i != e; ++i) {
|
||||
O << "L" << *i << "$non_lazy_ptr:\n";
|
||||
|
||||
@ -11,6 +11,7 @@
|
||||
#include "PowerPC.h"
|
||||
#include "PowerPCInstrBuilder.h"
|
||||
#include "PowerPCInstrInfo.h"
|
||||
#include "PowerPCTargetMachine.h"
|
||||
#include "llvm/Constants.h"
|
||||
#include "llvm/DerivedTypes.h"
|
||||
#include "llvm/Function.h"
|
||||
@ -26,17 +27,31 @@
|
||||
#include "llvm/Support/GetElementPtrTypeIterator.h"
|
||||
#include "llvm/Support/InstVisitor.h"
|
||||
#include "Support/Debug.h"
|
||||
#include "Support/Statistic.h"
|
||||
#include <vector>
|
||||
#include <iostream>
|
||||
using namespace llvm;
|
||||
|
||||
namespace {
|
||||
Statistic<> GEPConsts("ppc-codegen", "Number of const GEPs");
|
||||
Statistic<> GEPSplits("ppc-codegen", "Number of partially const GEPs");
|
||||
|
||||
/// TypeClass - Used by the PowerPC backend to group LLVM types by their basic
|
||||
/// PPC Representation.
|
||||
///
|
||||
enum TypeClass {
|
||||
cByte, cShort, cInt, cFP32, cFP64, cLong
|
||||
};
|
||||
|
||||
// This struct is for recording the necessary operations to emit the GEP
|
||||
typedef struct CollapsedGepOp {
|
||||
public:
|
||||
CollapsedGepOp(bool mul, Value *i, ConstantSInt *s) :
|
||||
isMul(mul), index(i), size(s) {}
|
||||
|
||||
bool isMul;
|
||||
Value *index;
|
||||
ConstantSInt *size;
|
||||
} CollapsedGepOp;
|
||||
}
|
||||
|
||||
/// getClass - Turn a primitive type into a "class" number which is based on the
|
||||
@ -71,7 +86,7 @@ static inline TypeClass getClassB(const Type *Ty) {
|
||||
|
||||
namespace {
|
||||
struct ISel : public FunctionPass, InstVisitor<ISel> {
|
||||
TargetMachine &TM;
|
||||
PowerPCTargetMachine &TM;
|
||||
MachineFunction *F; // The function we are compiling into
|
||||
MachineBasicBlock *BB; // The current MBB we are compiling
|
||||
int VarArgsFrameIndex; // FrameIndex for start of varargs area
|
||||
@ -90,7 +105,8 @@ namespace {
|
||||
// FrameIndex for the alloca.
|
||||
std::map<AllocaInst*, unsigned> AllocaMap;
|
||||
|
||||
ISel(TargetMachine &tm) : TM(tm), F(0), BB(0) {}
|
||||
ISel(TargetMachine &tm) : TM(reinterpret_cast<PowerPCTargetMachine&>(tm)),
|
||||
F(0), BB(0) {}
|
||||
|
||||
bool doInitialization(Module &M) {
|
||||
// Add external functions that we may call
|
||||
@ -582,6 +598,9 @@ void ISel::copyConstantToRegister(MachineBasicBlock *MBB,
|
||||
BuildMI(*MBB, IP, PPC32::LOADHiAddr, 2, TmpReg).addReg(CurPC)
|
||||
.addGlobalAddress(GV);
|
||||
BuildMI(*MBB, IP, Opcode, 2, R).addReg(TmpReg).addGlobalAddress(GV);
|
||||
|
||||
// Add the GV to the list of things whose addresses have been taken.
|
||||
TM.AddressTaken.insert(GV);
|
||||
} else {
|
||||
std::cerr << "Offending constant: " << *C << "\n";
|
||||
assert(0 && "Type not handled yet!");
|
||||
@ -1044,7 +1063,7 @@ void ISel::visitSetCondInst(SetCondInst &I) {
|
||||
// %TrueValue = li 1
|
||||
// b sinkMBB
|
||||
BB = copy1MBB;
|
||||
unsigned TrueValue = makeAnotherReg (I.getType ());
|
||||
unsigned TrueValue = makeAnotherReg(I.getType());
|
||||
BuildMI(BB, PPC32::LI, 1, TrueValue).addSImm(1);
|
||||
BuildMI(BB, PPC32::B, 1).addMBB(sinkMBB);
|
||||
// Update machine-CFG edges
|
||||
@ -1262,9 +1281,9 @@ static inline BasicBlock *getBlockAfter(BasicBlock *BB) {
|
||||
///
|
||||
void ISel::visitBranchInst(BranchInst &BI) {
|
||||
// Update machine-CFG edges
|
||||
BB->addSuccessor (MBBMap[BI.getSuccessor(0)]);
|
||||
BB->addSuccessor(MBBMap[BI.getSuccessor(0)]);
|
||||
if (BI.isConditional())
|
||||
BB->addSuccessor (MBBMap[BI.getSuccessor(1)]);
|
||||
BB->addSuccessor(MBBMap[BI.getSuccessor(1)]);
|
||||
|
||||
BasicBlock *NextBB = getBlockAfter(BI.getParent()); // BB after current one
|
||||
|
||||
@ -1524,9 +1543,10 @@ void ISel::visitCallInst(CallInst &CI) {
|
||||
visitIntrinsicCall(ID, CI); // Special intrinsics are not handled here
|
||||
return;
|
||||
}
|
||||
|
||||
// Emit a CALL instruction with PC-relative displacement.
|
||||
TheCall = BuildMI(PPC32::CALLpcrel, 1).addGlobalAddress(F, true);
|
||||
// Add it to the set of functions called to be used by the Printer
|
||||
TM.CalledFunctions.insert(F);
|
||||
} else { // Emit an indirect call through the CTR
|
||||
unsigned Reg = getReg(CI.getCalledValue());
|
||||
BuildMI(BB, PPC32::MTCTR, 1).addReg(Reg);
|
||||
@ -2084,6 +2104,7 @@ void ISel::emitDivRemOperation(MachineBasicBlock *BB,
|
||||
Args.push_back(ValueRecord(Op0Reg, Type::FloatTy));
|
||||
Args.push_back(ValueRecord(Op1Reg, Type::FloatTy));
|
||||
doCall(ValueRecord(ResultReg, Type::FloatTy), TheCall, Args, false);
|
||||
TM.CalledFunctions.insert(fmodfFn);
|
||||
}
|
||||
return;
|
||||
case cFP64:
|
||||
@ -2101,6 +2122,7 @@ void ISel::emitDivRemOperation(MachineBasicBlock *BB,
|
||||
Args.push_back(ValueRecord(Op0Reg, Type::DoubleTy));
|
||||
Args.push_back(ValueRecord(Op1Reg, Type::DoubleTy));
|
||||
doCall(ValueRecord(ResultReg, Type::DoubleTy), TheCall, Args, false);
|
||||
TM.CalledFunctions.insert(fmodFn);
|
||||
}
|
||||
return;
|
||||
case cLong: {
|
||||
@ -2116,6 +2138,7 @@ void ISel::emitDivRemOperation(MachineBasicBlock *BB,
|
||||
Args.push_back(ValueRecord(Op0Reg, Type::LongTy));
|
||||
Args.push_back(ValueRecord(Op1Reg, Type::LongTy));
|
||||
doCall(ValueRecord(ResultReg, Type::LongTy), TheCall, Args, false);
|
||||
TM.CalledFunctions.insert(Funcs[NameIdx]);
|
||||
return;
|
||||
}
|
||||
case cByte: case cShort: case cInt:
|
||||
@ -2175,10 +2198,10 @@ void ISel::emitDivRemOperation(MachineBasicBlock *BB,
|
||||
/// because the shift amount has to be in CL, not just any old register.
|
||||
///
|
||||
void ISel::visitShiftInst(ShiftInst &I) {
|
||||
MachineBasicBlock::iterator IP = BB->end ();
|
||||
emitShiftOperation(BB, IP, I.getOperand (0), I.getOperand (1),
|
||||
I.getOpcode () == Instruction::Shl, I.getType (),
|
||||
getReg (I));
|
||||
MachineBasicBlock::iterator IP = BB->end();
|
||||
emitShiftOperation(BB, IP, I.getOperand(0), I.getOperand(1),
|
||||
I.getOpcode() == Instruction::Shl, I.getType(),
|
||||
getReg(I));
|
||||
}
|
||||
|
||||
/// emitShiftOperation - Common code shared between visitShiftInst and
|
||||
@ -2272,7 +2295,7 @@ void ISel::emitShiftOperation(MachineBasicBlock *MBB,
|
||||
if (isSigned) {
|
||||
// FIXME: Unimplemented
|
||||
// Page C-3 of the PowerPC 32bit Programming Environments Manual
|
||||
std::cerr << "Unimplemented: signed right shift\n";
|
||||
std::cerr << "ERROR: Unimplemented: signed right shift\n";
|
||||
abort();
|
||||
} else {
|
||||
BuildMI(*MBB, IP, PPC32::SUBFIC, 2, TmpReg1).addReg(ShiftAmountReg)
|
||||
@ -2527,17 +2550,17 @@ void ISel::emitCastOperation(MachineBasicBlock *MBB,
|
||||
}
|
||||
|
||||
// Handle cast of LARGER int to SMALLER int with a clear or sign extend
|
||||
if ((SrcClass <= cInt || SrcClass == cLong) && DestClass <= cInt
|
||||
&& SrcClass > DestClass) {
|
||||
if ((SrcClass <= cInt || SrcClass == cLong) && DestClass <= cInt &&
|
||||
SrcClass > DestClass) {
|
||||
bool isUnsigned = DestTy->isUnsigned() || DestTy == Type::BoolTy;
|
||||
unsigned source = (SrcClass == cLong) ? SrcReg+1 : SrcReg;
|
||||
|
||||
if (isUnsigned) {
|
||||
unsigned shift = (SrcClass == cByte) ? 24 : 16;
|
||||
unsigned shift = (DestClass == cByte) ? 24 : 16;
|
||||
BuildMI(*BB, IP, PPC32::RLWINM, 4, DestReg).addReg(source).addZImm(0)
|
||||
.addImm(shift).addImm(31);
|
||||
} else {
|
||||
BuildMI(*BB, IP, (SrcClass == cByte) ? PPC32::EXTSB : PPC32::EXTSH, 1,
|
||||
BuildMI(*BB, IP, (DestClass == cByte) ? PPC32::EXTSB : PPC32::EXTSH, 1,
|
||||
DestReg).addReg(source);
|
||||
}
|
||||
return;
|
||||
@ -2554,6 +2577,7 @@ void ISel::emitCastOperation(MachineBasicBlock *MBB,
|
||||
MachineInstr *TheCall =
|
||||
BuildMI(PPC32::CALLpcrel, 1).addGlobalAddress(floatFn, true);
|
||||
doCall(ValueRecord(DestReg, DestTy), TheCall, Args, false);
|
||||
TM.CalledFunctions.insert(floatFn);
|
||||
return;
|
||||
}
|
||||
|
||||
@ -2621,6 +2645,7 @@ void ISel::emitCastOperation(MachineBasicBlock *MBB,
|
||||
MachineInstr *TheCall =
|
||||
BuildMI(PPC32::CALLpcrel, 1).addGlobalAddress(floatFn, true);
|
||||
doCall(ValueRecord(DestReg, DestTy), TheCall, Args, false);
|
||||
TM.CalledFunctions.insert(floatFn);
|
||||
return;
|
||||
}
|
||||
|
||||
@ -2729,13 +2754,18 @@ void ISel::emitGEPOperation(MachineBasicBlock *MBB,
|
||||
const TargetData &TD = TM.getTargetData();
|
||||
const Type *Ty = Src->getType();
|
||||
unsigned basePtrReg = getReg(Src, MBB, IP);
|
||||
|
||||
int64_t constValue = 0;
|
||||
bool anyCombined = false;
|
||||
|
||||
// Record the operations to emit the GEP in a vector so that we can emit them
|
||||
// after having analyzed the entire instruction.
|
||||
std::vector<CollapsedGepOp*> ops;
|
||||
|
||||
// GEPs have zero or more indices; we must perform a struct access
|
||||
// or array access for each one.
|
||||
for (GetElementPtrInst::op_iterator oi = IdxBegin, oe = IdxEnd; oi != oe;
|
||||
++oi) {
|
||||
Value *idx = *oi;
|
||||
unsigned nextBasePtrReg = makeAnotherReg(Type::UIntTy);
|
||||
if (const StructType *StTy = dyn_cast<StructType>(Ty)) {
|
||||
// It's a struct access. idx is the index into the structure,
|
||||
// which names the field. Use the TargetData structure to
|
||||
@ -2746,17 +2776,16 @@ void ISel::emitGEPOperation(MachineBasicBlock *MBB,
|
||||
unsigned fieldIndex = cast<ConstantUInt>(idx)->getValue();
|
||||
unsigned memberOffset =
|
||||
TD.getStructLayout(StTy)->MemberOffsets[fieldIndex];
|
||||
|
||||
if (0 == memberOffset) { // No-op
|
||||
nextBasePtrReg = basePtrReg;
|
||||
} else {
|
||||
// Emit an ADDI to add memberOffset to the basePtr.
|
||||
BuildMI (*MBB, IP, PPC32::ADDI, 2, nextBasePtrReg).addReg(basePtrReg)
|
||||
.addSImm(memberOffset);
|
||||
}
|
||||
// The next type is the member of the structure selected by the index.
|
||||
Ty = StTy->getElementType(fieldIndex);
|
||||
} else if (const SequentialType *SqTy = dyn_cast<SequentialType>(Ty)) {
|
||||
if (constValue != 0) anyCombined = true;
|
||||
|
||||
// StructType member offsets are always constant values. Add it to the
|
||||
// running total.
|
||||
constValue += memberOffset;
|
||||
|
||||
// The next type is the member of the structure selected by the
|
||||
// index.
|
||||
Ty = StTy->getElementType (fieldIndex);
|
||||
} else if (const SequentialType *SqTy = dyn_cast<SequentialType> (Ty)) {
|
||||
// Many GEP instructions use a [cast (int/uint) to LongTy] as their
|
||||
// operand. Handle this case directly now...
|
||||
if (CastInst *CI = dyn_cast<CastInst>(idx))
|
||||
@ -2764,39 +2793,91 @@ void ISel::emitGEPOperation(MachineBasicBlock *MBB,
|
||||
CI->getOperand(0)->getType() == Type::UIntTy)
|
||||
idx = CI->getOperand(0);
|
||||
|
||||
// It's an array or pointer access: [ArraySize x ElementType].
|
||||
// We want to add basePtrReg to (idxReg * sizeof ElementType). First, we
|
||||
// must find the size of the pointed-to type (Not coincidentally, the next
|
||||
// type is the type of the elements in the array).
|
||||
Ty = SqTy->getElementType();
|
||||
unsigned elementSize = TD.getTypeSize(Ty);
|
||||
|
||||
if (idx == Constant::getNullValue(idx->getType())) { // No-op
|
||||
nextBasePtrReg = basePtrReg;
|
||||
} else if (elementSize == 1) {
|
||||
// If the element size is 1, we don't have to multiply, just add
|
||||
unsigned idxReg = getReg(idx, MBB, IP);
|
||||
BuildMI(*MBB, IP, PPC32::ADD, 2, nextBasePtrReg).addReg(basePtrReg)
|
||||
.addReg(idxReg);
|
||||
} else {
|
||||
// It's an array or pointer access: [ArraySize x ElementType].
|
||||
// We want to add basePtrReg to (idxReg * sizeof ElementType). First, we
|
||||
// must find the size of the pointed-to type (Not coincidentally, the
|
||||
// next type is the type of the elements in the array).
|
||||
unsigned OffsetReg = makeAnotherReg(idx->getType());
|
||||
ConstantUInt *CUI = ConstantUInt::get(Type::UIntTy, elementSize);
|
||||
doMultiplyConst(MBB, IP, OffsetReg, idx, CUI);
|
||||
if (ConstantInt *C = dyn_cast<ConstantInt>(idx)) {
|
||||
if (constValue != 0) anyCombined = true;
|
||||
|
||||
// Deal with long indices
|
||||
if (getClass(idx->getType()) == cLong) ++OffsetReg;
|
||||
|
||||
// Emit an ADD to add OffsetReg to the basePtr.
|
||||
BuildMI (*MBB, IP, PPC32::ADD, 2, nextBasePtrReg).addReg(basePtrReg)
|
||||
.addReg(OffsetReg);
|
||||
if (ConstantSInt *CS = dyn_cast<ConstantSInt>(C))
|
||||
constValue += CS->getValue() * elementSize;
|
||||
else if (ConstantUInt *CU = dyn_cast<ConstantUInt>(C))
|
||||
constValue += CU->getValue() * elementSize;
|
||||
else
|
||||
assert(0 && "Invalid ConstantInt GEP index type!");
|
||||
} else {
|
||||
// Push current gep state to this point as an add
|
||||
CollapsedGepOp *addition =
|
||||
new CollapsedGepOp(false, 0, ConstantSInt::get(Type::IntTy,
|
||||
constValue));
|
||||
ops.push_back(addition);
|
||||
|
||||
// Push multiply gep op and reset constant value
|
||||
CollapsedGepOp *multiply =
|
||||
new CollapsedGepOp(true, idx, ConstantSInt::get(Type::IntTy,
|
||||
elementSize));
|
||||
ops.push_back(multiply);
|
||||
|
||||
constValue = 0;
|
||||
}
|
||||
}
|
||||
}
|
||||
// Do some statistical accounting
|
||||
if (ops.empty())
|
||||
++GEPConsts;
|
||||
|
||||
if (anyCombined)
|
||||
++GEPSplits;
|
||||
|
||||
// Emit instructions for all the collapsed ops
|
||||
for(std::vector<CollapsedGepOp *>::iterator cgo_i = ops.begin(),
|
||||
cgo_e = ops.end(); cgo_i != cgo_e; ++cgo_i) {
|
||||
CollapsedGepOp *cgo = *cgo_i;
|
||||
unsigned nextBasePtrReg = makeAnotherReg (Type::IntTy);
|
||||
|
||||
if (cgo->isMul) {
|
||||
// We know the elementSize is a constant, so we can emit a constant mul
|
||||
// and then add it to the current base reg
|
||||
unsigned TmpReg = makeAnotherReg(Type::IntTy);
|
||||
doMultiplyConst(MBB, IP, TmpReg, cgo->index, cgo->size);
|
||||
BuildMI(*MBB, IP, PPC32::ADD, 2, nextBasePtrReg).addReg(basePtrReg)
|
||||
.addReg(TmpReg);
|
||||
} else {
|
||||
// Try and generate an immediate addition if possible
|
||||
if (cgo->size->isNullValue()) {
|
||||
BuildMI(*MBB, IP, PPC32::OR, 2, nextBasePtrReg).addReg(basePtrReg)
|
||||
.addReg(basePtrReg);
|
||||
} else if (canUseAsImmediateForOpcode(cgo->size, 0)) {
|
||||
BuildMI(*MBB, IP, PPC32::ADDI, 2, nextBasePtrReg).addReg(basePtrReg)
|
||||
.addSImm(cgo->size->getValue());
|
||||
} else {
|
||||
unsigned Op1r = getReg(cgo->size, MBB, IP);
|
||||
BuildMI(*MBB, IP, PPC32::ADD, 2, nextBasePtrReg).addReg(basePtrReg)
|
||||
.addReg(Op1r);
|
||||
}
|
||||
}
|
||||
|
||||
basePtrReg = nextBasePtrReg;
|
||||
}
|
||||
// Add the current base register plus any accumulated constant value
|
||||
ConstantSInt *remainder = ConstantSInt::get(Type::IntTy, constValue);
|
||||
|
||||
// After we have processed all the indices, the result is left in
|
||||
// basePtrReg. Move it to the register where we were expected to
|
||||
// put the answer.
|
||||
BuildMI(BB, PPC32::OR, 2, TargetReg).addReg(basePtrReg).addReg(basePtrReg);
|
||||
if (remainder->isNullValue()) {
|
||||
BuildMI (BB, PPC32::OR, 2, TargetReg).addReg(basePtrReg).addReg(basePtrReg);
|
||||
} else if (canUseAsImmediateForOpcode(remainder, 0)) {
|
||||
BuildMI(*MBB, IP, PPC32::ADDI, 2, TargetReg).addReg(basePtrReg)
|
||||
.addSImm(remainder->getValue());
|
||||
} else {
|
||||
unsigned Op1r = getReg(remainder, MBB, IP);
|
||||
BuildMI(*MBB, IP, PPC32::ADD, 2, TargetReg).addReg(basePtrReg).addReg(Op1r);
|
||||
}
|
||||
}
|
||||
|
||||
/// visitAllocaInst - If this is a fixed size alloca, allocate space from the
|
||||
@ -2863,6 +2944,7 @@ void ISel::visitMallocInst(MallocInst &I) {
|
||||
MachineInstr *TheCall =
|
||||
BuildMI(PPC32::CALLpcrel, 1).addGlobalAddress(mallocFn, true);
|
||||
doCall(ValueRecord(getReg(I), I.getType()), TheCall, Args, false);
|
||||
TM.CalledFunctions.insert(mallocFn);
|
||||
}
|
||||
|
||||
|
||||
@ -2875,6 +2957,7 @@ void ISel::visitFreeInst(FreeInst &I) {
|
||||
MachineInstr *TheCall =
|
||||
BuildMI(PPC32::CALLpcrel, 1).addGlobalAddress(freeFn, true);
|
||||
doCall(ValueRecord(0, Type::VoidTy), TheCall, Args, false);
|
||||
TM.CalledFunctions.insert(freeFn);
|
||||
}
|
||||
|
||||
/// createPPC32SimpleInstructionSelector - This pass converts an LLVM function
|
||||
|
||||
@ -19,15 +19,18 @@
|
||||
#include "llvm/PassManager.h"
|
||||
#include "PowerPCInstrInfo.h"
|
||||
#include "PowerPCJITInfo.h"
|
||||
#include <set>
|
||||
|
||||
namespace llvm {
|
||||
|
||||
class GlobalValue;
|
||||
class IntrinsicLowering;
|
||||
|
||||
class PowerPCTargetMachine : public TargetMachine {
|
||||
PowerPCInstrInfo InstrInfo;
|
||||
TargetFrameInfo FrameInfo;
|
||||
PowerPCJITInfo JITInfo;
|
||||
|
||||
public:
|
||||
PowerPCTargetMachine(const Module &M, IntrinsicLowering *IL);
|
||||
|
||||
@ -53,6 +56,11 @@ public:
|
||||
|
||||
static unsigned getModuleMatchQuality(const Module &M);
|
||||
static unsigned getJITMatchQuality();
|
||||
|
||||
// Two shared sets between the instruction selector and the printer allow for
|
||||
// correct linkage on Darwin
|
||||
std::set<GlobalValue*> CalledFunctions;
|
||||
std::set<GlobalValue*> AddressTaken;
|
||||
};
|
||||
|
||||
} // end namespace llvm
|
||||
|
||||
Loading…
Reference in New Issue
Block a user