[llvm] r232451 - [IRCE] Add a -irce-print-range-checks option.

[Sanjoy Das]

Author: sanjoy
Date: Mon Mar 16 20:40:22 2015
New Revision: 232451

URL: http://llvm.org/viewvc/llvm-project?rev=232451&view=rev
Log:
[IRCE] Add a -irce-print-range-checks option.

-irce-print-range-checks prints out the set of range checks recognized
by IRCE.

Modified:
    llvm/trunk/lib/Transforms/Scalar/InductiveRangeCheckElimination.cpp

Modified: llvm/trunk/lib/Transforms/Scalar/InductiveRangeCheckElimination.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/Scalar/InductiveRangeCheckElimination.cpp?rev=232451&r1=232450&r2=232451&view=diff
==============================================================================
--- llvm/trunk/lib/Transforms/Scalar/InductiveRangeCheckElimination.cpp (original)
+++ llvm/trunk/lib/Transforms/Scalar/InductiveRangeCheckElimination.cpp Mon Mar 16 20:40:22 2015
@@ -82,6 +82,9 @@ static cl::opt<unsigned> LoopSizeCutoff(
 static cl::opt<bool> PrintChangedLoops("irce-print-changed-loops", cl::Hidden,
                                        cl::init(false));
 
+static cl::opt<bool> PrintRangeChecks("irce-print-range-checks", cl::Hidden,
+                                      cl::init(false));
+
 static cl::opt<int> MaxExitProbReciprocal("irce-max-exit-prob-reciprocal",
                                           cl::Hidden, cl::init(10));
 
@@ -1392,12 +1395,18 @@ bool InductiveRangeCheckElimination::run
   if (RangeChecks.empty())
     return false;
 
-  DEBUG(dbgs() << "irce: looking at loop "; L->print(dbgs());
-        dbgs() << "irce: loop has " << RangeChecks.size()
-               << " inductive range checks: \n";
-        for (InductiveRangeCheck *IRC : RangeChecks)
-          IRC->print(dbgs());
-    );
+  auto PrintRecognizedRangeChecks = [&](raw_ostream &OS) {
+    OS << "irce: looking at loop "; L->print(OS);
+    OS << "irce: loop has " << RangeChecks.size()
+       << " inductive range checks: \n";
+    for (InductiveRangeCheck *IRC : RangeChecks)
+      IRC->print(OS);
+  };
+
+  DEBUG(PrintRecognizedRangeChecks(dbgs()));
+
+  if (PrintRangeChecks)
+    PrintRecognizedRangeChecks(errs());
 
   const char *FailureReason = nullptr;
   Optional<LoopStructure> MaybeLoopStructure =