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add a new -view-sched-dags option to view dags as they are sent to the scheduler.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22878 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2005-08-18 20:11:49 +00:00
parent 0bc04231c0
commit 068ca15d5e
1 changed files with 10 additions and 0 deletions
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10
lib/CodeGen/SelectionDAG/ScheduleDAG.cpp
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@ -17,8 +17,17 @@
#include "llvm/CodeGen/SelectionDAG.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetInstrInfo.h"
#include "llvm/Support/CommandLine.h"
using namespace llvm;
#ifndef _NDEBUG
static cl::opt<bool>
ViewDAGs("view-sched-dags", cl::Hidden,
cl::desc("Pop up a window to show sched dags as they are processed"));
#else
static const bool ViewDAGS = 0;
#endif
namespace {
class SimpleSched {
SelectionDAG &DAG;
@ -112,5 +121,6 @@ unsigned SimpleSched::Emit(SDOperand Op) {
/// Pick a safe ordering and emit instructions for each target node in the
/// graph.
void SelectionDAGISel::ScheduleAndEmitDAG(SelectionDAG &SD) {
if (ViewDAGs) SD.viewGraph();
SimpleSched(SD, BB).Run();
}