1 //===-- SystemZTargetMachine.cpp - Define TargetMachine for SystemZ -------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #include "SystemZTargetMachine.h"
11 #include "llvm/CodeGen/Passes.h"
12 #include "llvm/Support/TargetRegistry.h"
13 
14 using namespace llvm;
15 
16 extern "C" void LLVMInitializeSystemZTarget() {
17   // Register the target.
18   RegisterTargetMachine<SystemZTargetMachine> X(TheSystemZTarget);
19 }
20 
21 SystemZTargetMachine::SystemZTargetMachine(const Target &T, StringRef TT,
22                                            StringRef CPU, StringRef FS,
23                                            const TargetOptions &Options,
24                                            Reloc::Model RM,
25                                            CodeModel::Model CM,
26                                            CodeGenOpt::Level OL)
27   : LLVMTargetMachine(T, TT, CPU, FS, Options, RM, CM, OL),
28     Subtarget(TT, CPU, FS),
29     // Make sure that global data has at least 16 bits of alignment by default,
30     // so that we can refer to it using LARL.  We don't have any special
31     // requirements for stack variables though.
32     DL("E-p:64:64:64-i1:8:16-i8:8:16-i16:16-i32:32-i64:64"
33        "-f32:32-f64:64-f128:64-a0:8:16-n32:64"),
34     InstrInfo(*this), TLInfo(*this), TSInfo(*this),
35     FrameLowering(*this, Subtarget) {
36 }
37 
38 namespace {
39 /// SystemZ Code Generator Pass Configuration Options.
40 class SystemZPassConfig : public TargetPassConfig {
41 public:
42   SystemZPassConfig(SystemZTargetMachine *TM, PassManagerBase &PM)
43     : TargetPassConfig(TM, PM) {}
44 
45   SystemZTargetMachine &getSystemZTargetMachine() const {
46     return getTM<SystemZTargetMachine>();
47   }
48 
49   virtual bool addInstSelector();
50 };
51 } // end anonymous namespace
52 
53 bool SystemZPassConfig::addInstSelector() {
54   addPass(createSystemZISelDag(getSystemZTargetMachine(), getOptLevel()));
55   return false;
56 }
57 
58 TargetPassConfig *SystemZTargetMachine::createPassConfig(PassManagerBase &PM) {
59   return new SystemZPassConfig(this, PM);
60 }
61