Reapply "blockfreq: Rewrite BlockFrequencyInfoImpl"

This reverts commit r206707, reapplying r206704.  The preceding commit
to CalcSpillWeights should have sorted out the failing buildbots.

<rdar://problem/14292693>

llvm-svn: 206766

1 files changed, 9 insertions, 3 deletions

diff --git a/llvm/lib/CodeGen/MachineBlockFrequencyInfo.cpp b/llvm/lib/CodeGen/MachineBlockFrequencyInfo.cpp
index 70efa307d57..d3ac0c0437d 100644
--- a/llvm/lib/CodeGen/MachineBlockFrequencyInfo.cpp
+++ b/llvm/lib/CodeGen/MachineBlockFrequencyInfo.cpp
@@ -11,9 +11,12 @@
 //
 //===----------------------------------------------------------------------===//
 
+#define DEBUG_TYPE "block-freq"
 #include "llvm/CodeGen/MachineBlockFrequencyInfo.h"
 #include "llvm/Analysis/BlockFrequencyInfoImpl.h"
 #include "llvm/CodeGen/MachineBranchProbabilityInfo.h"
+#include "llvm/CodeGen/MachineFunction.h"
+#include "llvm/CodeGen/MachineLoopInfo.h"
 #include "llvm/CodeGen/Passes.h"
 #include "llvm/InitializePasses.h"
 #include "llvm/Support/CommandLine.h"
@@ -112,6 +115,7 @@ struct DOTGraphTraits<MachineBlockFrequencyInfo*> :
 INITIALIZE_PASS_BEGIN(MachineBlockFrequencyInfo, "machine-block-freq",
                       "Machine Block Frequency Analysis", true, true)
 INITIALIZE_PASS_DEPENDENCY(MachineBranchProbabilityInfo)
+INITIALIZE_PASS_DEPENDENCY(MachineLoopInfo)
 INITIALIZE_PASS_END(MachineBlockFrequencyInfo, "machine-block-freq",
                     "Machine Block Frequency Analysis", true, true)
 
@@ -127,16 +131,18 @@ MachineBlockFrequencyInfo::~MachineBlockFrequencyInfo() {}
 
 void MachineBlockFrequencyInfo::getAnalysisUsage(AnalysisUsage &AU) const {
   AU.addRequired<MachineBranchProbabilityInfo>();
+  AU.addRequired<MachineLoopInfo>();
   AU.setPreservesAll();
   MachineFunctionPass::getAnalysisUsage(AU);
 }
 
 bool MachineBlockFrequencyInfo::runOnMachineFunction(MachineFunction &F) {
   MachineBranchProbabilityInfo &MBPI =
-    getAnalysis<MachineBranchProbabilityInfo>();
+      getAnalysis<MachineBranchProbabilityInfo>();
+  MachineLoopInfo &MLI = getAnalysis<MachineLoopInfo>();
   if (!MBFI)
     MBFI.reset(new ImplType);
-  MBFI->doFunction(&F, &MBPI);
+  MBFI->doFunction(&F, &MBPI, &MLI);
 #ifndef NDEBUG
   if (ViewMachineBlockFreqPropagationDAG != GVDT_None) {
     view();
@@ -166,7 +172,7 @@ getBlockFreq(const MachineBasicBlock *MBB) const {
 }
 
 const MachineFunction *MachineBlockFrequencyInfo::getFunction() const {
-  return MBFI ? MBFI->Fn : nullptr;
+  return MBFI ? MBFI->getFunction() : nullptr;
 }
 
 raw_ostream &