When unswitching a trivial loop, do admit we are doing it! :)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26102 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/Scalar/LoopUnswitch.cpp b/lib/Transforms/Scalar/LoopUnswitch.cpp
index f059325..b130689 100644
--- a/lib/Transforms/Scalar/LoopUnswitch.cpp
+++ b/lib/Transforms/Scalar/LoopUnswitch.cpp
@@ -346,6 +346,11 @@
/// moving the conditional branch outside of the loop and updating loop info.
void LoopUnswitch::UnswitchTrivialCondition(Loop *L, Value *Cond,
ConstantBool *LoopCond) {
+ DEBUG(std::cerr << "loop-unswitch: Trivial-Unswitch loop %"
+ << L->getHeader()->getName() << " [" << L->getBlocks().size()
+ << " blocks] in Function " << L->getHeader()->getParent()->getName()
+ << " on cond:" << *Cond << "\n");
+
// First step, split the preahder, so that we know that there is a safe place
// to insert the conditional branch. We will change 'OrigPH' to have a
// conditional branch on Cond.
@@ -373,6 +378,8 @@
// particular value, rewrite the loop with this info. We know that this will
// at least eliminate the old branch.
RewriteLoopBodyWithConditionConstant(L, Cond, EnterOnTrue);
+
+ ++NumUnswitched;
}