From 7fd7061de03ca8987e9997e498b67efb6d614fde Mon Sep 17 00:00:00 2001
From: Andreas Neustifter <astifter-llvm@gmx.at>
Date: Wed, 9 Sep 2009 17:51:39 +0000
Subject: Cleaned up code by factoring out common portions of edge loading into
 funcion.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81358 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Analysis/ProfileInfoLoaderPass.cpp | 49 +++++++++++++++-------------------
 1 file changed, 22 insertions(+), 27 deletions(-)

(limited to 'lib/Analysis/ProfileInfoLoaderPass.cpp')

diff --git a/lib/Analysis/ProfileInfoLoaderPass.cpp b/lib/Analysis/ProfileInfoLoaderPass.cpp
index e79dd8c0c2..9b5760f2cd 100644
--- a/lib/Analysis/ProfileInfoLoaderPass.cpp
+++ b/lib/Analysis/ProfileInfoLoaderPass.cpp
@@ -61,8 +61,8 @@ namespace {
     // blocks as possbile.
     virtual void recurseBasicBlock(const BasicBlock *BB);
     virtual void readEdgeOrRemember(Edge, Edge&, unsigned &, unsigned &);
-    virtual void readOrRememberEdge(ProfileInfo::Edge, unsigned,
-                                    unsigned, Function*);
+    virtual unsigned readEdge(ProfileInfo::Edge, std::vector<unsigned>,
+                              unsigned, Function*);
 
     /// run - Load the profile information from the specified file.
     virtual bool runOnModule(Module &M);
@@ -156,15 +156,21 @@ void LoaderPass::recurseBasicBlock(const BasicBlock *BB) {
   }
 }
 
-void LoaderPass::readOrRememberEdge(ProfileInfo::Edge e,
-                                    unsigned weight, unsigned ei,
-                                    Function *F) {
-  if (weight != ~0U) {
-    EdgeInformation[F][e] += weight;
-    DEBUG(errs()<<"--Read Edge Counter for " << e 
-                <<" (# "<<ei<<"): "<<(unsigned)getEdgeWeight(e)<<"\n");
+unsigned LoaderPass::readEdge(ProfileInfo::Edge e, std::vector<unsigned> ECs,
+                              unsigned ei, Function *F) {
+  if (ei < ECs.size()) {
+    double weight = ECs[ei];
+    if (weight != ~0U) {
+      EdgeInformation[F][e] += weight;
+      DEBUG(errs()<<"--Read Edge Counter for " << e 
+                  <<" (# "<<ei<<"): "<<(unsigned)getEdgeWeight(e)<<"\n");
+    } else {
+      // This happens only when loading edges for optimal edge profiling.
+      SpanningTree.insert(e);
+    }
+    return ei++
   } else {
-    SpanningTree.insert(e);
+    return ei;
   }
 }
 
@@ -177,18 +183,15 @@ bool LoaderPass::runOnModule(Module &M) {
     unsigned ei = 0;
     for (Module::iterator F = M.begin(), E = M.end(); F != E; ++F) {
       if (F->isDeclaration()) continue;
-      if (ei < ECs.size())
-        EdgeInformation[F][ProfileInfo::getEdge(0, &F->getEntryBlock())] +=
-          ECs[ei++];
+      DEBUG(errs()<<"Working on "<<F->getNameStr()<<"\n");
+      ei = readEdge(getEdge(0,&F->getEntryBlock()), ECs, ei, F);
       for (Function::iterator BB = F->begin(), E = F->end(); BB != E; ++BB) {
         // Okay, we have to add a counter of each outgoing edge.  If the
         // outgoing edge is not critical don't split it, just insert the counter
         // in the source or destination of the edge.
         TerminatorInst *TI = BB->getTerminator();
         for (unsigned s = 0, e = TI->getNumSuccessors(); s != e; ++s) {
-          if (ei < ECs.size())
-            EdgeInformation[F][ProfileInfo::getEdge(BB, TI->getSuccessor(s))] +=
-              ECs[ei++];
+          ei = readEdge(getEdge(BB,TI->getSuccessor(s)), ECs, ei, F);
         }
       }
     }
@@ -205,22 +208,14 @@ bool LoaderPass::runOnModule(Module &M) {
     for (Module::iterator F = M.begin(), E = M.end(); F != E; ++F) {
       if (F->isDeclaration()) continue;
       DEBUG(errs()<<"Working on "<<F->getNameStr()<<"\n");
-      if (ei < ECs.size()) {
-        readOrRememberEdge(getEdge(0,&F->getEntryBlock()), ECs[ei], ei, F); 
-        ei++;
-      }
+      ei = readEdge(getEdge(0,&F->getEntryBlock()), ECs, ei, F);
       for (Function::iterator BB = F->begin(), E = F->end(); BB != E; ++BB) {
         TerminatorInst *TI = BB->getTerminator();
         if (TI->getNumSuccessors() == 0) {
-          if (ei < ECs.size()) {
-            readOrRememberEdge(getEdge(BB,0), ECs[ei], ei, F); ei++;
-          }
+          ei = readEdge(getEdge(BB,0), ECs, ei, F);
         }
         for (unsigned s = 0, e = TI->getNumSuccessors(); s != e; ++s) {
-          if (ei < ECs.size()) {
-            readOrRememberEdge(getEdge(BB,TI->getSuccessor(s)), ECs[ei], ei, F);
-            ei++;
-          }
+          ei = readEdge(getEdge(BB,TI->getSuccessor(s)), ECs, ei, F);
         }
       }
       while (SpanningTree.size() > 0) {
-- 
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