Fix a ValueTracking rule: RHS means operand 1, not 0. Add a simple

[oota-llvm.git] / lib / Target / Mips / MipsTargetMachine.cpp

diff --git a/lib/Target/Mips/MipsTargetMachine.cpp b/lib/Target/Mips/MipsTargetMachine.cpp
index 7493bb527eb60157e226c2eac3c68a75d2393cb0..ff2e5b81589c9950090723f25fcdb24956418764 100644 (file)
--- a/lib/Target/Mips/MipsTargetMachine.cpp
+++ b/lib/Target/Mips/MipsTargetMachine.cpp
@@ -19,10 +19,17 @@
 #include "llvm/Target/TargetMachineRegistry.h"
 using namespace llvm;
 
-namespace {
-  // Register the target.
-  RegisterTarget<MipsTargetMachine> X("mips", "  Mips");
-}
+/// MipsTargetMachineModule - Note that this is used on hosts that
+/// cannot link in a library unless there are references into the
+/// library.  In particular, it seems that it is not possible to get
+/// things to work on Win32 without this.  Though it is unused, do not
+/// remove it.
+extern "C" int MipsTargetMachineModule;
+int MipsTargetMachineModule = 0;
+
+// Register the target.
+static RegisterTarget<MipsTargetMachine>    X("mips", "Mips");
+static RegisterTarget<MipselTargetMachine>  Y("mipsel", "Mipsel");
 
 const TargetAsmInfo *MipsTargetMachine::
 createTargetAsmInfo() const 
@@ -34,38 +41,71 @@ createTargetAsmInfo() const
 // The stack is always 8 byte aligned
 // On function prologue, the stack is created by decrementing
 // its pointer. Once decremented, all references are done with positive
-// offset from the stack/frame pointer, so StackGrowsUp is used.
-// When using CodeModel::Large the behaviour 
-//
-// 
+// offset from the stack/frame pointer, using StackGrowsUp enables 
+// an easier handling.
+// Using CodeModel::Large enables different CALL behavior.
 MipsTargetMachine::
-MipsTargetMachine(const Module &M, const std::string &FS): 
-  Subtarget(*this, M, FS), DataLayout("E-p:32:32:32"), 
-  InstrInfo(*this), FrameInfo(TargetFrameInfo::StackGrowsUp, 8, 0),
+MipsTargetMachine(const Module &M, const std::string &FS, bool isLittle=false):
+  Subtarget(*this, M, FS, isLittle), 
+  DataLayout(isLittle ? std::string("e-p:32:32:32-i8:8:32-i16:16:32") :
+                        std::string("E-p:32:32:32-i8:8:32-i16:16:32")), 
+  InstrInfo(*this), 
+  FrameInfo(TargetFrameInfo::StackGrowsUp, 8, 0),
   TLInfo(*this) 
 {
-  if (getRelocationModel() != Reloc::Static)
+  // Abicall enables PIC by default
+  if (Subtarget.hasABICall())
     setRelocationModel(Reloc::PIC_);  
+
+  // TODO: create an option to enable long calls, like -mlong-calls, 
+  // that would be our CodeModel::Large. It must not work with Abicall.
   if (getCodeModel() == CodeModel::Default)
     setCodeModel(CodeModel::Small);
 }
 
+MipselTargetMachine::
+MipselTargetMachine(const Module &M, const std::string &FS) :
+  MipsTargetMachine(M, FS, true) {}
+
 // return 0 and must specify -march to gen MIPS code.
 unsigned MipsTargetMachine::
 getModuleMatchQuality(const Module &M) 
 {
-  // We strongly match "mips-*".
+  // We strongly match "mips*-*".
   std::string TT = M.getTargetTriple();
   if (TT.size() >= 5 && std::string(TT.begin(), TT.begin()+5) == "mips-")
     return 20;
   
+  if (TT.size() >= 13 && std::string(TT.begin(), 
+      TT.begin()+13) == "mipsallegrex-")
+    return 20;
+
+  return 0;
+}
+
+// return 0 and must specify -march to gen MIPSEL code.
+unsigned MipselTargetMachine::
+getModuleMatchQuality(const Module &M) 
+{
+  // We strongly match "mips*el-*".
+  std::string TT = M.getTargetTriple();
+  if (TT.size() >= 7 && std::string(TT.begin(), TT.begin()+7) == "mipsel-")
+    return 20;
+
+  if (TT.size() >= 15 && std::string(TT.begin(), 
+      TT.begin()+15) == "mipsallegrexel-")
+    return 20;
+
+  if (TT.size() == 3 && std::string(TT.begin(), TT.begin()+3) == "psp")
+    return 20;
+  
   return 0;
 }
 
 // Install an instruction selector pass using 
 // the ISelDag to gen Mips code.
 bool MipsTargetMachine::
-addInstSelector(FunctionPassManager &PM, bool Fast) 
+addInstSelector(PassManagerBase &PM, bool Fast) 
 {
   PM.add(createMipsISelDag(*this));
   return false;
@@ -75,7 +115,7 @@ addInstSelector(FunctionPassManager &PM, bool Fast)
 // machine code is emitted. return true if -print-machineinstrs should 
 // print out the code after the passes.
 bool MipsTargetMachine::
-addPreEmitPass(FunctionPassManager &PM, bool Fast) 
+addPreEmitPass(PassManagerBase &PM, bool Fast) 
 {
   PM.add(createMipsDelaySlotFillerPass(*this));
   return true;
@@ -84,8 +124,8 @@ addPreEmitPass(FunctionPassManager &PM, bool Fast)
 // Implements the AssemblyEmitter for the target. Must return
 // true if AssemblyEmitter is supported
 bool MipsTargetMachine::
-addAssemblyEmitter(FunctionPassManager &PM, bool Fast, 
-                   std::ostream &Out) 
+addAssemblyEmitter(PassManagerBase &PM, bool Fast, 
+                   raw_ostream &Out) 
 {
   // Output assembly language.
   PM.add(createMipsCodePrinterPass(Out, *this));