AMDGPU: Cleanup subtarget handling.

Split AMDGPUSubtarget into amdgcn/r600 specific subclasses.
This removes most of the static_casting of the basic codegen
classes everywhere, and tries to restrict the features
visible on the wrong target.

llvm-svn: 273652

1 files changed, 5 insertions, 4 deletions

diff --git a/llvm/lib/Target/AMDGPU/SILoadStoreOptimizer.cpp b/llvm/lib/Target/AMDGPU/SILoadStoreOptimizer.cpp
index ec92265..0b9b29a 100644
--- a/llvm/lib/Target/AMDGPU/SILoadStoreOptimizer.cpp
+++ b/llvm/lib/Target/AMDGPU/SILoadStoreOptimizer.cpp
@@ -36,6 +36,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "AMDGPU.h"
+#include "AMDGPUSubtarget.h"
 #include "SIInstrInfo.h"
 #include "SIRegisterInfo.h"
 #include "llvm/CodeGen/LiveIntervalAnalysis.h"
@@ -61,7 +62,6 @@ private:
   MachineRegisterInfo *MRI;
   LiveIntervals *LIS;
 
-
   static bool offsetsCanBeCombined(unsigned Offset0,
                                    unsigned Offset1,
                                    unsigned EltSize);
@@ -411,9 +411,10 @@ bool SILoadStoreOptimizer::runOnMachineFunction(MachineFunction &MF) {
   if (skipFunction(*MF.getFunction()))
     return false;
 
-  const TargetSubtargetInfo &STM = MF.getSubtarget();
-  TRI = static_cast<const SIRegisterInfo *>(STM.getRegisterInfo());
-  TII = static_cast<const SIInstrInfo *>(STM.getInstrInfo());
+  const SISubtarget &STM = MF.getSubtarget<SISubtarget>();
+  TII = STM.getInstrInfo();
+  TRI = &TII->getRegisterInfo();
+
   MRI = &MF.getRegInfo();
 
   LIS = &getAnalysis<LiveIntervals>();