Add InlineCost class for represent the estimated cost of inlining a

function.
 - This explicitly models the costs for functions which should
   "always" or "never" be inlined. This fixes bugs where such costs
   were not previously respected.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@58450 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Transforms/IPO/InlineSimple.cpp

@@ -37,7 +37,7 @@ namespace {
     SimpleInliner() : Inliner(&ID) {}
     SimpleInliner(int Threshold) : Inliner(&ID, Threshold) {}
     static char ID; // Pass identification, replacement for typeid
-    int getInlineCost(CallSite CS) {
+    InlineCost getInlineCost(CallSite CS) {
       return CA.getInlineCost(CS, NeverInline);
     }
     float getInlineFudgeFactor(CallSite CS) {