Use instruction itinerary to determine what instructions are 'cheap'.

[oota-llvm.git] / include / llvm / Analysis / CodeMetrics.h

diff --git a/include/llvm/Analysis/CodeMetrics.h b/include/llvm/Analysis/CodeMetrics.h
index 6ae68f36d7b962cb74aa2dfb4dad4200a2fde956..e89ad9026d027d0f6a0cd3ed32eadfbd0a933024 100644 (file)
--- a/include/llvm/Analysis/CodeMetrics.h
+++ b/include/llvm/Analysis/CodeMetrics.h
@@ -45,6 +45,11 @@ namespace llvm {
 
     /// NumCalls - Keep track of the number of calls to 'big' functions.
     unsigned NumCalls;
+    
+    /// NumInlineCandidates - Keep track of the number of calls to internal
+    /// functions with only a single caller.  These are likely targets for
+    /// future inlining, likely exposed by interleaved devirtualization.
+    unsigned NumInlineCandidates;
 
     /// NumVectorInsts - Keep track of how many instructions produce vector
     /// values.  The inliner is being more aggressive with inlining vector
@@ -56,7 +61,8 @@ namespace llvm {
 
     CodeMetrics() : callsSetJmp(false), isRecursive(false),
                     containsIndirectBr(false), usesDynamicAlloca(false), 
-                    NumInsts(0), NumBlocks(0), NumCalls(0), NumVectorInsts(0), 
+                    NumInsts(0), NumBlocks(0), NumCalls(0),
+                    NumInlineCandidates(0), NumVectorInsts(0), 
                     NumRets(0) {}
 
     /// analyzeBasicBlock - Add information about the specified basic block
@@ -71,7 +77,12 @@ namespace llvm {
     /// 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.