1 //===-- IA64TargetMachine.cpp - Define TargetMachine for IA64 -------------===//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by Duraid Madina and is distributed under the
6 // University of Illinois Open Source License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines the IA64 specific subclass of TargetMachine.
12 //===----------------------------------------------------------------------===//
14 #include "IA64TargetMachine.h"
16 #include "llvm/Module.h"
17 #include "llvm/PassManager.h"
18 #include "llvm/CodeGen/IntrinsicLowering.h"
19 #include "llvm/CodeGen/MachineFunction.h"
20 #include "llvm/CodeGen/Passes.h"
21 #include "llvm/Target/TargetOptions.h"
22 #include "llvm/Target/TargetMachineRegistry.h"
23 #include "llvm/Transforms/Scalar.h"
24 #include "llvm/Support/CommandLine.h"
25 #include "llvm/ADT/Statistic.h"
29 /// IA64TargetMachineModule - Note that this is used on hosts that cannot link
30 /// in a library unless there are references into the library. In particular,
31 /// it seems that it is not possible to get things to work on Win32 without
32 /// this. Though it is unused, do not remove it.
33 extern "C" int IA64TargetMachineModule;
34 int IA64TargetMachineModule = 0;
37 cl::opt<bool> DisableOutput("disable-ia64-llc-output", cl::Hidden,
38 cl::desc("Disable the IA64 asm printer, for use "
39 "when profiling the code generator."));
41 cl::opt<bool> EnableDAGIsel("enable-ia64-dag-isel", cl::Hidden,
42 cl::desc("Enable the IA64 DAG->DAG isel"));
44 // Register the target.
45 RegisterTarget<IA64TargetMachine> X("ia64", " IA-64 (Itanium)");
48 unsigned IA64TargetMachine::compileTimeMatchQuality() {
49 #if defined(__ia64__) || defined(__IA64__)
56 unsigned IA64TargetMachine::getModuleMatchQuality(const Module &M) {
57 // we match [iI][aA]*64
59 std::string TT = M.getTargetTriple();
62 if( (TT[0]=='i' || TT[0]=='I') &&
63 (TT[1]=='a' || TT[1]=='A') ) {
64 for(unsigned int i=2; i<(TT.size()-1); i++)
65 if(TT[i]=='6' && TT[i+1]=='4')
70 return 50; // strong match
73 return compileTimeMatchQuality()/2;
77 /// IA64TargetMachine ctor - Create an LP64 architecture model
79 IA64TargetMachine::IA64TargetMachine(const Module &M, IntrinsicLowering *IL,
80 const std::string &FS)
81 : TargetMachine("IA64", IL, true),
82 FrameInfo(TargetFrameInfo::StackGrowsDown, 16, 0),
83 TLInfo(*this) { // FIXME? check this stuff
86 // addPassesToEmitFile - We currently use all of the same passes as the JIT
87 // does to emit statically compiled machine code.
88 bool IA64TargetMachine::addPassesToEmitFile(PassManager &PM,
90 CodeGenFileType FileType,
92 if (FileType != TargetMachine::AssemblyFile) return true;
94 // FIXME: Implement efficient support for garbage collection intrinsics.
95 PM.add(createLowerGCPass());
97 // FIXME: Implement the invoke/unwind instructions!
98 PM.add(createLowerInvokePass(704, 16)); // on ia64 linux, jmpbufs are 704
99 // bytes and must be 16byte aligned
101 // FIXME: Implement the switch instruction in the instruction selector!
102 PM.add(createLowerSwitchPass());
104 // Make sure that no unreachable blocks are instruction selected.
105 PM.add(createUnreachableBlockEliminationPass());
107 // Add an instruction selector
108 // FIXME: reap this option one day: if(EnableDAGIsel)
109 PM.add(createIA64DAGToDAGInstructionSelector(*this));
112 // Run optional SSA-based machine code optimizations next...
114 PM.add(createIA64SSAPeepholeOptimizerPass());
117 // Print the instruction selected machine code...
118 if (PrintMachineCode)
119 PM.add(createMachineFunctionPrinterPass(&std::cerr));
121 // Perform register allocation to convert to a concrete IA64 representation
122 PM.add(createRegisterAllocator());
124 if (PrintMachineCode)
125 PM.add(createMachineFunctionPrinterPass(&std::cerr));
127 if (PrintMachineCode)
128 PM.add(createMachineFunctionPrinterPass(&std::cerr));
130 // Insert prolog/epilog code. Eliminate abstract frame index references...
131 PM.add(createPrologEpilogCodeInserter());
133 /* XXX no, not just yet */
134 // PM.add(createIA64PeepholeOptimizerPass());
136 // Make sure everything is bundled happily
137 PM.add(createIA64BundlingPass(*this));
139 if (PrintMachineCode) // Print the register-allocated code
140 PM.add(createIA64CodePrinterPass(std::cerr, *this));
143 PM.add(createIA64CodePrinterPass(Out, *this));
145 // Delete machine code for this function
146 PM.add(createMachineCodeDeleter());
148 return false; // success!