diff options
| -rw-r--r-- | lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp index 9ccf87cfd8..ae6b08cfb6 100644 --- a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp +++ b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp @@ -28,11 +28,20 @@ #include "llvm/Target/TargetInstrInfo.h" #include "llvm/Target/TargetLowering.h" #include "llvm/Target/TargetMachine.h" +#include "llvm/Support/CommandLine.h" #include "llvm/Support/Debug.h" #include <map> #include <iostream> using namespace llvm; +#ifndef _NDEBUG +static cl::opt<bool> +ViewDAGs("view-isel-dags", cl::Hidden, + cl::desc("Pop up a window to show isel dags as they are selected")); +#else +static const bool ViewDAGS = 0; +#endif + namespace llvm { //===--------------------------------------------------------------------===// /// FunctionLoweringInfo - This contains information that is global to a @@ -890,6 +899,8 @@ void SelectionDAGISel::SelectBasicBlock(BasicBlock *LLVMBB, MachineFunction &MF, // the code to the MachineBasicBlock. InstructionSelectBasicBlock(DAG); + if (ViewDAGs) DAG.viewGraph(); + DEBUG(std::cerr << "Selected machine code:\n"); DEBUG(BB->dump()); |