Implement Subtarget support

Implement the X86 Subtarget.

This consolidates the checks for target triple, and setting options based
on target triple into one place.  This allows us to convert the asm printer
and isel over from being littered with "forDarwin", "forCygwin", etc. into
just having the appropriate flags for each subtarget feature controlling
the code for that feature.

This patch also implements indirect external and weak references in the
X86 pattern isel, for darwin.  Next up is to convert over the asm printers
to use this new interface.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22389 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 3 insertions, 0 deletions

diff --git a/lib/Target/X86/X86TargetMachine.h b/lib/Target/X86/X86TargetMachine.h
index 70b111c38b..955f855602 100644
--- a/lib/Target/X86/X86TargetMachine.h
+++ b/lib/Target/X86/X86TargetMachine.h
@@ -19,12 +19,14 @@
 #include "llvm/PassManager.h"
 #include "X86InstrInfo.h"
 #include "X86JITInfo.h"
+#include "X86Subtarget.h"
 
 namespace llvm {
 class IntrinsicLowering;
 
 class X86TargetMachine : public TargetMachine {
   X86InstrInfo    InstrInfo;
+  X86Subtarget    Subtarget;
   TargetFrameInfo FrameInfo;
   X86JITInfo      JITInfo;
 public:
@@ -33,6 +35,7 @@ public:
   virtual const X86InstrInfo     *getInstrInfo() const { return &InstrInfo; }
   virtual const TargetFrameInfo  *getFrameInfo() const { return &FrameInfo; }
   virtual       TargetJITInfo    *getJITInfo()         { return &JITInfo; }
+  virtual const TargetSubtarget  *getSubtargetImpl() const{ return &Subtarget; }
   virtual const MRegisterInfo    *getRegisterInfo() const {
     return &InstrInfo.getRegisterInfo();
   }