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Add an option to view the selection dags as they are generated.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19498 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2005-01-12 03:41:21 +00:00
parent 9a6127504a
commit 7944d9d995
1 changed files with 11 additions and 0 deletions
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11
lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
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@ -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());