From 3fc3148b85b70e4365815600adfcc5ff686b1599 Mon Sep 17 00:00:00 2001 From: Chris Lattner Date: Fri, 10 Feb 2006 01:36:35 +0000 Subject: [PATCH] When unswitching a trivial loop, do admit we are doing it! :) llvm-svn: 26102 --- llvm/lib/Transforms/Scalar/LoopUnswitch.cpp | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/llvm/lib/Transforms/Scalar/LoopUnswitch.cpp b/llvm/lib/Transforms/Scalar/LoopUnswitch.cpp index f0593255f261..b130689081d5 100644 --- a/llvm/lib/Transforms/Scalar/LoopUnswitch.cpp +++ b/llvm/lib/Transforms/Scalar/LoopUnswitch.cpp @@ -346,6 +346,11 @@ static Loop *CloneLoop(Loop *L, Loop *PL, std::map &VM, /// 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 @@ void LoopUnswitch::UnswitchTrivialCondition(Loop *L, Value *Cond, // particular value, rewrite the loop with this info. We know that this will // at least eliminate the old branch. RewriteLoopBodyWithConditionConstant(L, Cond, EnterOnTrue); + + ++NumUnswitched; }