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 if (TargetDefault == PPCTarget) {
69 if (Subtarget.isAIX()) PPCTarget = TargetAIX;
70 if (Subtarget.isDarwin()) PPCTarget = TargetDarwin;
74 /// addPassesToEmitFile - Add passes to the specified pass manager to implement
75 /// a static compiler for this target.
77 bool PPCTargetMachine::addPassesToEmitFile(PassManager &PM,
79 CodeGenFileType FileType) {
80 if (FileType != TargetMachine::AssemblyFile) return true;
82 // Run loop strength reduction before anything else.
83 PM.add(createLoopStrengthReducePass());
85 // FIXME: Implement efficient support for garbage collection intrinsics.
86 PM.add(createLowerGCPass());
88 // FIXME: Implement the invoke/unwind instructions!
89 PM.add(createLowerInvokePass());
91 // Clean up after other passes, e.g. merging critical edges.
92 PM.add(createCFGSimplificationPass());
94 // FIXME: Implement the switch instruction in the instruction selector!
95 PM.add(createLowerSwitchPass());
97 // Make sure that no unreachable blocks are instruction selected.
98 PM.add(createUnreachableBlockEliminationPass());
100 // Install an instruction selector.
101 if (!DisablePPCDAGDAG)
102 PM.add(createPPC32ISelDag(*this));
104 PM.add(createPPC32ISelPattern(*this));
106 if (PrintMachineCode)
107 PM.add(createMachineFunctionPrinterPass(&std::cerr));
109 PM.add(createRegisterAllocator());
111 if (PrintMachineCode)
112 PM.add(createMachineFunctionPrinterPass(&std::cerr));
114 PM.add(createPrologEpilogCodeInserter());
116 // Must run branch selection immediately preceding the asm printer
117 PM.add(createPPCBranchSelectionPass());
119 // Decide which asm printer to use. If the user has not specified one on
120 // the command line, choose whichever one matches the default (current host).
123 PM.add(createAIXAsmPrinter(Out, *this));
127 PM.add(createDarwinAsmPrinter(Out, *this));
131 PM.add(createMachineCodeDeleter());
135 void PPCJITInfo::addPassesToJITCompile(FunctionPassManager &PM) {
136 // The JIT does not support or need PIC.
139 // Run loop strength reduction before anything else.
140 PM.add(createLoopStrengthReducePass());
142 // FIXME: Implement efficient support for garbage collection intrinsics.
143 PM.add(createLowerGCPass());
145 // FIXME: Implement the invoke/unwind instructions!
146 PM.add(createLowerInvokePass());
148 // Clean up after other passes, e.g. merging critical edges.
149 PM.add(createCFGSimplificationPass());
151 // FIXME: Implement the switch instruction in the instruction selector!
152 PM.add(createLowerSwitchPass());
154 // Make sure that no unreachable blocks are instruction selected.
155 PM.add(createUnreachableBlockEliminationPass());
157 // Install an instruction selector.
158 if (!DisablePPCDAGDAG)
159 PM.add(createPPC32ISelDag(TM));
161 PM.add(createPPC32ISelPattern(TM));
163 PM.add(createRegisterAllocator());
164 PM.add(createPrologEpilogCodeInserter());
166 // Must run branch selection immediately preceding the asm printer
167 PM.add(createPPCBranchSelectionPass());
169 if (PrintMachineCode)
170 PM.add(createMachineFunctionPrinterPass(&std::cerr));