AMDGPU: Add skeleton GlobalIsel implementation

Summary:
This adds the necessary target code to be able to run the ir translator.
Lowering function arguments and returns is a nop and there is no support
for RegBankSelect.

Reviewers: arsenm, qcolombet

Subscribers: arsenm, joker.eph, vkalintiris, llvm-commits

Differential Revision: http://reviews.llvm.org/D19077

llvm-svn: 266356

1 files changed, 8 insertions, 0 deletions

diff --git a/llvm/lib/Target/AMDGPU/AMDGPUSubtarget.h b/llvm/lib/Target/AMDGPU/AMDGPUSubtarget.h
index 318410f9861..c74edab4b44 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUSubtarget.h
+++ b/llvm/lib/Target/AMDGPU/AMDGPUSubtarget.h
@@ -22,6 +22,7 @@
 #include "AMDGPUSubtarget.h"
 #include "Utils/AMDGPUBaseInfo.h"
 #include "llvm/ADT/StringRef.h"
+#include "llvm/CodeGen/GlobalISel/GISelAccessor.h"
 #include "llvm/Target/TargetSubtargetInfo.h"
 
 #define GET_SUBTARGETINFO_HEADER
@@ -98,6 +99,7 @@ private:
   std::unique_ptr<AMDGPUFrameLowering> FrameLowering;
   std::unique_ptr<AMDGPUTargetLowering> TLInfo;
   std::unique_ptr<AMDGPUInstrInfo> InstrInfo;
+  std::unique_ptr<GISelAccessor> GISel;
   InstrItineraryData InstrItins;
   Triple TargetTriple;
 
@@ -107,6 +109,10 @@ public:
   AMDGPUSubtarget &initializeSubtargetDependencies(const Triple &TT,
                                                    StringRef GPU, StringRef FS);
 
+  void setGISelAccessor(GISelAccessor &GISel) {
+    this->GISel.reset(&GISel);
+  }
+
   const AMDGPUFrameLowering *getFrameLowering() const override {
     return FrameLowering.get();
   }
@@ -123,6 +129,8 @@ public:
     return &InstrItins;
   }
 
+  const CallLowering *getCallLowering() const override;
+
   void ParseSubtargetFeatures(StringRef CPU, StringRef FS);
 
   bool hasVertexCache() const {