Add skeleton of simple basic block instruction selector.

llvm-svn: 54522

1 files changed, 7 insertions, 3 deletions

diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
index ac30ff63b70..d1c49d00eed 100644
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
@@ -12,10 +12,10 @@
 //===----------------------------------------------------------------------===//
 
 #define DEBUG_TYPE "isel"
+#include "llvm/CodeGen/SelectionDAGISel.h"
+#include "SimpleBBISel.h"
 #include "llvm/ADT/BitVector.h"
 #include "llvm/Analysis/AliasAnalysis.h"
-#include "llvm/CodeGen/SelectionDAGISel.h"
-#include "llvm/CodeGen/ScheduleDAG.h"
 #include "llvm/Constants.h"
 #include "llvm/CallingConv.h"
 #include "llvm/DerivedTypes.h"
@@ -33,6 +33,7 @@
 #include "llvm/CodeGen/MachineJumpTableInfo.h"
 #include "llvm/CodeGen/MachineModuleInfo.h"
 #include "llvm/CodeGen/MachineRegisterInfo.h"
+#include "llvm/CodeGen/ScheduleDAG.h"
 #include "llvm/CodeGen/SchedulerRegistry.h"
 #include "llvm/CodeGen/SelectionDAG.h"
 #include "llvm/Target/TargetRegisterInfo.h"
@@ -5441,11 +5442,14 @@ void SelectionDAGISel::SelectAllBasicBlocks(Function &Fn, MachineFunction &MF,
   // each basic block.
   NodeAllocatorType NodeAllocator;
 
+  SimpleBBISel SISel(MF, TLI);
   std::vector<std::pair<MachineInstr*, unsigned> > PHINodesToUpdate;
   for (Function::iterator I = Fn.begin(), E = Fn.end(); I != E; ++I) {
     BasicBlock *LLVMBB = &*I;
     PHINodesToUpdate.clear();
-    SelectBasicBlock(LLVMBB, MF, FuncInfo, PHINodesToUpdate, NodeAllocator);
+
+    if (!FastISel || !SISel.SelectBasicBlock(LLVMBB,  FuncInfo.MBBMap[LLVMBB]))
+      SelectBasicBlock(LLVMBB, MF, FuncInfo, PHINodesToUpdate, NodeAllocator);
     FinishBasicBlock(LLVMBB, MF, FuncInfo, PHINodesToUpdate, NodeAllocator);
   }
 }