Subzero: Add a few performance measurement tools.

src/PNaClTranslator.cpp

Index: src/PNaClTranslator.cpp
diff --git a/src/PNaClTranslator.cpp b/src/PNaClTranslator.cpp
index af78e2f3e802e3f29af026d6a9f3aa69d2762c20..aa7d095fa39b62bbf70dbc8b58d9df7de6928864 100644
--- a/src/PNaClTranslator.cpp
+++ b/src/PNaClTranslator.cpp
@@ -843,6 +843,10 @@ public:
         NextLocalInstIndex(Context->getNumGlobalValueIDs()),
         InstIsTerminating(false) {
     Func->setFunctionName(LLVMFunc->getName());
+    if (getFlags().TimeEachFunction)
+      getTranslator().getContext()->pushTimer(
+          Ice::GlobalContext::getTimerID(Func->getFunctionName()),
+          Ice::GlobalContext::TSK_Funcs);
     Func->setReturnType(Context->convertToIceType(LLVMFunc->getReturnType()));
     Func->setInternal(LLVMFunc->hasInternalLinkage());
     CurrentNode = InstallNextBasicBlock();
@@ -1404,6 +1408,10 @@ void FunctionParser::ExitBlock() {
   // for such parsing errors.
   if (Context->getNumErrors() == 0)
     getTranslator().translateFcn(Func);
+  if (getFlags().TimeEachFunction)
+    getTranslator().getContext()->popTimer(
+        Ice::GlobalContext::getTimerID(Func->getFunctionName()),
+        Ice::GlobalContext::TSK_Funcs);
 }
 
 void FunctionParser::ReportInvalidBinaryOp(Ice::InstArithmetic::OpKind Op,