1 //===-- LLVMTargetMachine.cpp - Implement the LLVMTargetMachine class -----===//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by Chris Lattner and is distributed under
6 // the University of Illinois Open Source License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements the LLVMTargetMachine class.
12 //===----------------------------------------------------------------------===//
14 #include "llvm/Target/TargetMachine.h"
15 #include "llvm/PassManager.h"
16 #include "llvm/Pass.h"
17 #include "llvm/CodeGen/Passes.h"
18 #include "llvm/Target/TargetOptions.h"
19 #include "llvm/Transforms/Scalar.h"
23 bool LLVMTargetMachine::addPassesToEmitFile(FunctionPassManager &PM,
25 CodeGenFileType FileType,
27 // Standard LLVM-Level Passes.
29 // Run loop strength reduction before anything else.
30 if (!Fast) PM.add(createLoopStrengthReducePass(getTargetLowering()));
32 // FIXME: Implement efficient support for garbage collection intrinsics.
33 PM.add(createLowerGCPass());
35 // FIXME: Implement the invoke/unwind instructions!
36 PM.add(createLowerInvokePass(getTargetLowering()));
38 // Make sure that no unreachable blocks are instruction selected.
39 PM.add(createUnreachableBlockEliminationPass());
42 // Ask the target for an isel.
43 if (addInstSelector(PM, Fast))
47 // Print the instruction selected machine code...
49 PM.add(createMachineFunctionPrinterPass(&std::cerr));
51 // Perform register allocation to convert to a concrete x86 representation
52 PM.add(createRegisterAllocator());
55 PM.add(createMachineFunctionPrinterPass(&std::cerr));
58 // Run post-ra passes.
59 if (addPostRegAlloc(PM, Fast) && PrintMachineCode)
60 PM.add(createMachineFunctionPrinterPass(&std::cerr));
63 // Insert prolog/epilog code. Eliminate abstract frame index references...
64 PM.add(createPrologEpilogCodeInserter());
66 // Branch folding must be run after regalloc and prolog/epilog insertion.
68 PM.add(createBranchFoldingPass());
70 if (PrintMachineCode) // Print the register-allocated code
71 PM.add(createMachineFunctionPrinterPass(&std::cerr));
74 if (addPreEmitPass(PM, Fast) && PrintMachineCode)
75 PM.add(createMachineFunctionPrinterPass(&std::cerr));
80 case TargetMachine::AssemblyFile:
81 if (addAssemblyEmitter(PM, Fast, Out))
84 case TargetMachine::ObjectFile:
85 if (addObjectWriter(PM, Fast, Out))
90 // Delete machine code for this function
91 PM.add(createMachineCodeDeleter());
93 return false; // success!
96 /// addPassesToEmitMachineCode - Add passes to the specified pass manager to
97 /// get machine code emitted. This uses a MachineCodeEmitter object to handle
98 /// actually outputting the machine code and resolving things like the address
99 /// of functions. This method should returns true if machine code emission is
102 bool LLVMTargetMachine::addPassesToEmitMachineCode(FunctionPassManager &PM,
103 MachineCodeEmitter &MCE,
105 // Standard LLVM-Level Passes.
107 // Run loop strength reduction before anything else.
108 if (!Fast) PM.add(createLoopStrengthReducePass(getTargetLowering()));
110 // FIXME: Implement efficient support for garbage collection intrinsics.
111 PM.add(createLowerGCPass());
113 // FIXME: Implement the invoke/unwind instructions!
114 PM.add(createLowerInvokePass(getTargetLowering()));
116 // Make sure that no unreachable blocks are instruction selected.
117 PM.add(createUnreachableBlockEliminationPass());
120 // Ask the target for an isel.
121 if (addInstSelector(PM, Fast))
125 // Print the instruction selected machine code...
126 if (PrintMachineCode)
127 PM.add(createMachineFunctionPrinterPass(&std::cerr));
129 // Perform register allocation to convert to a concrete x86 representation
130 PM.add(createRegisterAllocator());
132 if (PrintMachineCode)
133 PM.add(createMachineFunctionPrinterPass(&std::cerr));
136 // Run post-ra passes.
137 if (addPostRegAlloc(PM, Fast) && PrintMachineCode)
138 PM.add(createMachineFunctionPrinterPass(&std::cerr));
141 // Insert prolog/epilog code. Eliminate abstract frame index references...
142 PM.add(createPrologEpilogCodeInserter());
144 if (PrintMachineCode) // Print the register-allocated code
145 PM.add(createMachineFunctionPrinterPass(&std::cerr));
148 if (addPreEmitPass(PM, Fast) && PrintMachineCode)
149 PM.add(createMachineFunctionPrinterPass(&std::cerr));
152 addCodeEmitter(PM, Fast, MCE);
154 // Delete machine code for this function
155 PM.add(createMachineCodeDeleter());
157 return false; // success!