[PM] Port BreakCriticalEdges to the new PM.

Differential Revision: https://reviews.llvm.org/D22688

llvm-svn: 276449

1 files changed, 16 insertions, 2 deletions

diff --git a/llvm/lib/Transforms/Utils/BreakCriticalEdges.cpp b/llvm/lib/Transforms/Utils/BreakCriticalEdges.cpp
index 49b646a041f..175cbd2ce0d 100644
--- a/llvm/lib/Transforms/Utils/BreakCriticalEdges.cpp
+++ b/llvm/lib/Transforms/Utils/BreakCriticalEdges.cpp
@@ -15,7 +15,7 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "llvm/Transforms/Scalar.h"
+#include "llvm/Transforms/Utils/BreakCriticalEdges.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/Statistic.h"
 #include "llvm/Analysis/AliasAnalysis.h"
@@ -23,10 +23,10 @@
 #include "llvm/Analysis/LoopInfo.h"
 #include "llvm/IR/CFG.h"
 #include "llvm/IR/Dominators.h"
-#include "llvm/IR/Function.h"
 #include "llvm/IR/Instructions.h"
 #include "llvm/IR/Type.h"
 #include "llvm/Support/ErrorHandling.h"
+#include "llvm/Transforms/Scalar.h"
 #include "llvm/Transforms/Utils/BasicBlockUtils.h"
 using namespace llvm;
 
@@ -72,6 +72,20 @@ FunctionPass *llvm::createBreakCriticalEdgesPass() {
   return new BreakCriticalEdges();
 }
 
+PreservedAnalyses BreakCriticalEdgesPass::run(Function &F,
+                                              FunctionAnalysisManager &AM) {
+  auto *DT = AM.getCachedResult<DominatorTreeAnalysis>(F);
+  auto *LI = AM.getCachedResult<LoopAnalysis>(F);
+  unsigned N = SplitAllCriticalEdges(F, CriticalEdgeSplittingOptions(DT, LI));
+  NumBroken += N;
+  if (N == 0)
+    return PreservedAnalyses::all();
+  PreservedAnalyses PA;
+  PA.preserve<DominatorTreeAnalysis>();
+  PA.preserve<LoopAnalysis>();
+  return PA;
+}
+
 //===----------------------------------------------------------------------===//
 //    Implementation of the external critical edge manipulation functions
 //===----------------------------------------------------------------------===//