1 //===-- X86TargetMachine.cpp - Define TargetMachine for the X86 -----------===//
3 // This file defines the X86 specific subclass of TargetMachine.
5 //===----------------------------------------------------------------------===//
7 #include "X86TargetMachine.h"
8 #include "llvm/Transforms/Scalar.h"
9 #include "llvm/Target/TargetMachineImpls.h"
10 #include "llvm/CodeGen/MachineFunction.h"
11 #include "Support/Statistic.h"
12 #include "llvm/PassManager.h"
16 // allocateX86TargetMachine - Allocate and return a subclass of TargetMachine
17 // that implements the X86 backend.
19 TargetMachine *allocateX86TargetMachine() { return new X86TargetMachine(); }
22 /// X86TargetMachine ctor - Create an ILP32 architecture model
24 X86TargetMachine::X86TargetMachine() : TargetMachine("X86", 1, 4, 4, 4) {
28 /// addPassesToJITCompile - Add passes to the specified pass manager to
29 /// implement a fast dynamic compiler for this target. Return true if this is
30 /// not supported for this target.
32 bool X86TargetMachine::addPassesToJITCompile(PassManager &PM) {
33 // For the moment we have decided that malloc and free will be
34 // taken care of by converting them to calls, using the existing
35 // LLVM scalar transforms pass to do this.
36 PM.add(createLowerAllocationsPass());
38 PM.add(createSimpleX86InstructionSelector(*this));
40 // TODO: optional optimizations go here
42 // Print the instruction selected machine code...
43 DEBUG(PM.add(createMachineFunctionPrinterPass()));
45 // Perform register allocation to convert to a concrete x86 representation
46 PM.add(createSimpleX86RegisterAllocator(*this));
48 // Print the instruction selected machine code...
49 // PM.add(createMachineFunctionPrinterPass());
51 // Print the register-allocated code
52 DEBUG(PM.add(createX86CodePrinterPass(*this, std::cerr)));
54 return false; // success!