Rotate two of the functions used to count bonuses for the inline cost

analysis to be methods on the cost analysis's function info object
instead of the code metrics object. These really are just users of the
code metrics, they're building the information for the function's
analysis.

This is the first step of growing the amount of information we collect
about a function in order to cope with pair-wise simplifications due to
allocas.

llvm-svn: 152283

llvm/include/llvm/Analysis/CodeMetrics.h

@@ -81,21 +81,10 @@ namespace llvm {
     /// to the current structure.
     void analyzeFunction(Function *F, const TargetData *TD = 0);
 
-    /// CountCodeReductionForConstant - Figure out an approximation for how
-    /// many instructions will be constant folded if the specified value is
-    /// constant.
-    unsigned CountCodeReductionForConstant(Value *V);
-
     /// CountBonusForConstant - Figure out an approximation for how much
     /// per-call performance boost we can expect if the specified value is
     /// constant.
     unsigned CountBonusForConstant(Value *V);
-
-    /// CountCodeReductionForAlloca - Figure out an approximation of how much
-    /// smaller the function will be if it is inlined into a context where an
-    /// argument becomes an alloca.
-    ///
-    unsigned CountCodeReductionForAlloca(Value *V);
   };
 }
 

llvm/include/llvm/Analysis/InlineCost.h

@@ -110,6 +110,18 @@ namespace llvm {
       /// entry here.
       std::vector<ArgInfo> ArgumentWeights;
 
+      /// countCodeReductionForConstant - Figure out an approximation for how
+      /// many instructions will be constant folded if the specified value is
+      /// constant.
+      unsigned countCodeReductionForConstant(const CodeMetrics &Metrics,
+                                             Value *V);
+
+      /// countCodeReductionForAlloca - Figure out an approximation of how much
+      /// smaller the function will be if it is inlined into a context where an
+      /// argument becomes an alloca.
+      unsigned countCodeReductionForAlloca(const CodeMetrics &Metrics,
+                                           Value *V);
+
       /// analyzeFunction - Add information about the specified function
       /// to the current structure.
       void analyzeFunction(Function *F, const TargetData *TD);

llvm/lib/Analysis/InlineCost.cpp

@@ -162,10 +162,8 @@ void CodeMetrics::analyzeBasicBlock(const BasicBlock *BB,
   NumBBInsts[BB] = NumInsts - NumInstsBeforeThisBB;
 }
 
-// CountCodeReductionForConstant - Figure out an approximation for how many
-// instructions will be constant folded if the specified value is constant.
-//
-unsigned CodeMetrics::CountCodeReductionForConstant(Value *V) {
+unsigned InlineCostAnalyzer::FunctionInfo::countCodeReductionForConstant(
+    const CodeMetrics &Metrics, Value *V) {
   unsigned Reduction = 0;
   for (Value::use_iterator UI = V->use_begin(), E = V->use_end(); UI != E;++UI){
     User *U = *UI;
@@ -175,7 +173,7 @@ unsigned CodeMetrics::CountCodeReductionForConstant(Value *V) {
       const unsigned NumSucc = TI.getNumSuccessors();
       unsigned Instrs = 0;
       for (unsigned I = 0; I != NumSucc; ++I)
-        Instrs += NumBBInsts[TI.getSuccessor(I)];
+        Instrs += Metrics.NumBBInsts.lookup(TI.getSuccessor(I));
       // We don't know which blocks will be eliminated, so use the average size.
       Reduction += InlineConstants::InstrCost*Instrs*(NumSucc-1)/NumSucc;
     } else {
@@ -207,18 +205,15 @@ unsigned CodeMetrics::CountCodeReductionForConstant(Value *V) {
 
         // And any other instructions that use it which become constants
         // themselves.
-        Reduction += CountCodeReductionForConstant(&Inst);
+        Reduction += countCodeReductionForConstant(Metrics, &Inst);
       }
     }
   }
   return Reduction;
 }
 
-// CountCodeReductionForAlloca - Figure out an approximation of how much smaller
-// the function will be if it is inlined into a context where an argument
-// becomes an alloca.
-//
-unsigned CodeMetrics::CountCodeReductionForAlloca(Value *V) {
+unsigned InlineCostAnalyzer::FunctionInfo::countCodeReductionForAlloca(
+    const CodeMetrics &Metrics, Value *V) {
   if (!V->getType()->isPointerTy()) return 0;  // Not a pointer
   unsigned Reduction = 0;
 
@@ -331,7 +326,8 @@ unsigned CodeMetrics::CountCodeReductionForAlloca(Value *V) {
         if (BranchInst *BI = dyn_cast<BranchInst>(I)) {
           BasicBlock *BB = BI->getSuccessor(Result ? 0 : 1);
           if (BB->getSinglePredecessor())
-            Reduction += InlineConstants::InstrCost * NumBBInsts[BB];
+            Reduction
+              += InlineConstants::InstrCost * Metrics.NumBBInsts.lookup(BB);
         }
       }
     } while (!Worklist.empty());
@@ -372,8 +368,8 @@ void InlineCostAnalyzer::FunctionInfo::analyzeFunction(Function *F,
   // code can be eliminated if one of the arguments is a constant.
   ArgumentWeights.reserve(F->arg_size());
   for (Function::arg_iterator I = F->arg_begin(), E = F->arg_end(); I != E; ++I)
-    ArgumentWeights.push_back(ArgInfo(Metrics.CountCodeReductionForConstant(I),
-                                      Metrics.CountCodeReductionForAlloca(I)));
+    ArgumentWeights.push_back(ArgInfo(countCodeReductionForConstant(Metrics, I),
+                                      countCodeReductionForAlloca(Metrics, I)));
 }
 
 /// NeverInline - returns true if the function should never be inlined into