Added Subtarget support into RegisterInfo

Added HasABICall and HasAbsoluteCall (equivalent to gcc -mabicall and 
-mno-shared). HasAbsoluteCall is not implemented but HasABICall is the 
default for o32 ABI. Now, both should help into a more accurate 
relocation types implementation. 
Added IsLinux is needed to choose between asm directives.
Instruction name strings cleanup.
AsmPrinter improved.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53551 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/Mips/MipsTargetMachine.cpp

@@ -44,8 +44,12 @@ MipsTargetMachine(const Module &M, const std::string &FS, bool isLittle=false):
   FrameInfo(TargetFrameInfo::StackGrowsUp, 8, 0),
   TLInfo(*this) 
 {
-  if (getRelocationModel() != Reloc::Static)
+  // Abicall enables PIC by default
+  if (Subtarget.hasABICall() && (getRelocationModel() != Reloc::Static))
     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);
 }