[PATCH] D15489: Use getEdgeProbability() instead of getEdgeWeight() in BFI and remove getEdgeWeight() interfaces from MBPI.

[Cong Hou via llvm-commits]

congh added inline comments.

================
Comment at: test/Analysis/BlockFrequencyInfo/bad_input.ll:13
@@ -14,1 +12,3 @@
+; Check that we get 1 and a huge frequency instead of 0,3.
+; CHECK-NEXT: for.body: float = 2147483647.8,
 for.body:
----------------
davidxl wrote:
> I know FE does that (0->1)  when creating MD_prof metadata. Where in BFI that does similar thing?
> 
> 
It is done in BlockFrequencyInfoImplBase::addToDist():

bool BlockFrequencyInfoImplBase::addToDist(Distribution &Dist,
                                           const LoopData *OuterLoop,
                                           const BlockNode &Pred,
                                           const BlockNode &Succ,
                                           uint64_t Weight) {
  if (!Weight)
    Weight = 1;

  auto isLoopHeader = [&OuterLoop](const BlockNode &Node) {
    return OuterLoop && OuterLoop->isHeader(Node);
  };

  ...


http://reviews.llvm.org/D15489