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

1 files changed, 22 insertions, 2 deletions

diff --git a/lib/Target/Mips/MipsSubtarget.cpp b/lib/Target/Mips/MipsSubtarget.cpp
index 96ff30ba4a..3424388011 100644
--- a/lib/Target/Mips/MipsSubtarget.cpp
+++ b/lib/Target/Mips/MipsSubtarget.cpp
@@ -15,23 +15,34 @@
 #include "Mips.h"
 #include "MipsGenSubtarget.inc"
 #include "llvm/Module.h"
+#include "llvm/Support/CommandLine.h"
 using namespace llvm;
 
+cl::opt<bool> NotABICall("disable-mips-abicall", cl::Hidden,
+              cl::desc("Disable code for SVR4-style dynamic objects"));
+cl::opt<bool> AbsoluteCall("enable-mips-absolute-call", cl::Hidden,
+              cl::desc("Enable absolute call within abicall"));
+
 MipsSubtarget::MipsSubtarget(const TargetMachine &TM, const Module &M, 
                              const std::string &FS, bool little) : 
   MipsArchVersion(Mips1), MipsABI(O32), IsLittle(little), IsSingleFloat(false),
-  IsFP64bit(false), IsGP64bit(false), HasVFPU(false), HasSEInReg(false)
+  IsFP64bit(false), IsGP64bit(false), HasVFPU(false), HasSEInReg(false),
+  HasABICall(true), HasAbsoluteCall(false), IsLinux(true)
 {
   std::string CPU = "mips1";
 
   // Parse features string.
   ParseSubtargetFeatures(FS, CPU);
+  const std::string& TT = M.getTargetTriple();
+
+  // Is the target system Linux ?
+  if (TT.find("linux") == std::string::npos)
+    IsLinux = false;
 
   // When only the target triple is specified and is 
   // a allegrex target, set the features. We also match
   // big and little endian allegrex cores (dont really
   // know if a big one exists)
-  const std::string& TT = M.getTargetTriple();
   if (TT.find("mipsallegrex") != std::string::npos) {
     MipsABI = EABI;
     IsSingleFloat = true;
@@ -39,4 +50,13 @@ MipsSubtarget::MipsSubtarget(const TargetMachine &TM, const Module &M,
     HasVFPU = true; // Enables Allegrex Vector FPU (not supported yet)
     HasSEInReg = true;
   }
+
+  // Abicall is the default for O32 ABI and is ignored 
+  // for EABI.
+  if (NotABICall || isABI_EABI())
+    HasABICall = false;
+
+  // TODO: disable when handling 64 bit symbols in the future.
+  if (HasABICall && AbsoluteCall)
+    HasAbsoluteCall = true;
 }