From 411bd29eea3c360d5b48a18a17b5e87f5671af0e Mon Sep 17 00:00:00 2001 From: Dimitry Andric Date: Sun, 17 Jul 2011 15:36:56 +0000 Subject: Vendor import of llvm trunk r135360: http://llvm.org/svn/llvm-project/llvm/trunk@135360 --- include/llvm/Analysis/BranchProbabilityInfo.h | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-) (limited to 'include/llvm/Analysis/BranchProbabilityInfo.h') diff --git a/include/llvm/Analysis/BranchProbabilityInfo.h b/include/llvm/Analysis/BranchProbabilityInfo.h index 91f289da7c45..02ead98321ff 100644 --- a/include/llvm/Analysis/BranchProbabilityInfo.h +++ b/include/llvm/Analysis/BranchProbabilityInfo.h @@ -15,8 +15,9 @@ #define LLVM_ANALYSIS_BRANCHPROBABILITYINFO_H #include "llvm/InitializePasses.h" +#include "llvm/Pass.h" +#include "llvm/ADT/DenseMap.h" #include "llvm/Support/BranchProbability.h" -#include "llvm/Analysis/LoopInfo.h" namespace llvm { @@ -25,6 +26,11 @@ class raw_ostream; class BranchProbabilityInfo : public FunctionPass { // Default weight value. Used when we don't have information about the edge. + // TODO: DEFAULT_WEIGHT makes sense during static predication, when none of + // the successors have a weight yet. But it doesn't make sense when providing + // weight to an edge that may have siblings with non-zero weights. This can + // be handled various ways, but it's probably fine for an edge with unknown + // weight to just "inherit" the non-zero weight of an adjacent successor. static const uint32_t DEFAULT_WEIGHT = 16; typedef std::pair Edge; @@ -41,10 +47,7 @@ public: initializeBranchProbabilityInfoPass(*PassRegistry::getPassRegistry()); } - void getAnalysisUsage(AnalysisUsage &AU) const { - AU.addRequired(); - AU.setPreservesAll(); - } + void getAnalysisUsage(AnalysisUsage &AU) const; bool runOnFunction(Function &F); -- cgit v1.2.3