1 //===-- PPCTargetMachine.cpp - Define TargetMachine for PowerPC -----------===//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by the LLVM research group and is distributed under
6 // the University of Illinois Open Source License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // Top-level implementation for the PowerPC target.
12 //===----------------------------------------------------------------------===//
15 #include "PPCFrameInfo.h"
16 #include "PPCTargetMachine.h"
17 #include "PPCJITInfo.h"
18 #include "llvm/Module.h"
19 #include "llvm/PassManager.h"
20 #include "llvm/Analysis/Verifier.h"
21 #include "llvm/CodeGen/IntrinsicLowering.h"
22 #include "llvm/CodeGen/MachineFunction.h"
23 #include "llvm/CodeGen/Passes.h"
24 #include "llvm/Target/TargetOptions.h"
25 #include "llvm/Target/TargetMachineRegistry.h"
26 #include "llvm/Transforms/Scalar.h"
27 #include "llvm/Support/CommandLine.h"
32 static cl::opt<bool> DisablePPCDAGDAG("disable-ppc-dag-isel", cl::Hidden,
33 cl::desc("Disable DAG-to-DAG isel for PPC"));
35 // Register the targets
36 RegisterTarget<PPCTargetMachine>
37 X("ppc32", " PowerPC");
40 unsigned PPCTargetMachine::getJITMatchQuality() {
41 #if defined(__POWERPC__) || defined (__ppc__) || defined(_POWER)
48 unsigned PPCTargetMachine::getModuleMatchQuality(const Module &M) {
49 // We strongly match "powerpc-*".
50 std::string TT = M.getTargetTriple();
51 if (TT.size() >= 8 && std::string(TT.begin(), TT.begin()+8) == "powerpc-")
54 if (M.getEndianness() == Module::BigEndian &&
55 M.getPointerSize() == Module::Pointer32)
56 return 10; // Weak match
57 else if (M.getEndianness() != Module::AnyEndianness ||
58 M.getPointerSize() != Module::AnyPointerSize)
59 return 0; // Match for some other target
61 return getJITMatchQuality()/2;
64 PPCTargetMachine::PPCTargetMachine(const Module &M, IntrinsicLowering *IL,
65 const std::string &FS)
66 : TargetMachine("PowerPC", IL, false, 4, 4, 4, 4, 4, 4, 2, 1, 1),
67 Subtarget(M, FS), FrameInfo(*this, false), JITInfo(*this),
68 InstrItins(Subtarget.getInstrItineraryData()) {
69 if (TargetDefault == PPCTarget) {
70 if (Subtarget.isAIX()) PPCTarget = TargetAIX;
71 if (Subtarget.isDarwin()) PPCTarget = TargetDarwin;
75 /// addPassesToEmitFile - Add passes to the specified pass manager to implement
76 /// a static compiler for this target.
78 bool PPCTargetMachine::addPassesToEmitFile(PassManager &PM,
80 CodeGenFileType FileType,
82 if (FileType != TargetMachine::AssemblyFile) return true;
84 // Run loop strength reduction before anything else.
85 if (!Fast) PM.add(createLoopStrengthReducePass());
87 // FIXME: Implement efficient support for garbage collection intrinsics.
88 PM.add(createLowerGCPass());
90 // FIXME: Implement the invoke/unwind instructions!
91 PM.add(createLowerInvokePass());
93 // Clean up after other passes, e.g. merging critical edges.
94 if (!Fast) PM.add(createCFGSimplificationPass());
96 // FIXME: Implement the switch instruction in the instruction selector!
97 PM.add(createLowerSwitchPass());
99 // Make sure that no unreachable blocks are instruction selected.
100 PM.add(createUnreachableBlockEliminationPass());
102 // Install an instruction selector.
103 if (!DisablePPCDAGDAG)
104 PM.add(createPPCISelDag(*this));
106 PM.add(createPPCISelPattern(*this));
108 if (PrintMachineCode)
109 PM.add(createMachineFunctionPrinterPass(&std::cerr));
111 PM.add(createRegisterAllocator());
113 if (PrintMachineCode)
114 PM.add(createMachineFunctionPrinterPass(&std::cerr));
116 PM.add(createPrologEpilogCodeInserter());
118 // Must run branch selection immediately preceding the asm printer
119 PM.add(createPPCBranchSelectionPass());
121 // Decide which asm printer to use. If the user has not specified one on
122 // the command line, choose whichever one matches the default (current host).
125 PM.add(createAIXAsmPrinter(Out, *this));
129 PM.add(createDarwinAsmPrinter(Out, *this));
133 PM.add(createMachineCodeDeleter());
137 void PPCJITInfo::addPassesToJITCompile(FunctionPassManager &PM) {
138 // The JIT does not support or need PIC.
141 // Run loop strength reduction before anything else.
142 PM.add(createLoopStrengthReducePass());
144 // FIXME: Implement efficient support for garbage collection intrinsics.
145 PM.add(createLowerGCPass());
147 // FIXME: Implement the invoke/unwind instructions!
148 PM.add(createLowerInvokePass());
150 // Clean up after other passes, e.g. merging critical edges.
151 PM.add(createCFGSimplificationPass());
153 // FIXME: Implement the switch instruction in the instruction selector!
154 PM.add(createLowerSwitchPass());
156 // Make sure that no unreachable blocks are instruction selected.
157 PM.add(createUnreachableBlockEliminationPass());
159 // Install an instruction selector.
160 if (!DisablePPCDAGDAG)
161 PM.add(createPPCISelDag(TM));
163 PM.add(createPPCISelPattern(TM));
165 PM.add(createRegisterAllocator());
166 PM.add(createPrologEpilogCodeInserter());
168 // Must run branch selection immediately preceding the asm printer
169 PM.add(createPPCBranchSelectionPass());
171 if (PrintMachineCode)
172 PM.add(createMachineFunctionPrinterPass(&std::cerr));