From 06f94d59026b5de5b22a47c01dd452d8a8bbeaa7 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Sat, 10 Feb 2007 05:54:33 +0000
Subject: [PATCH] Only compute the module levels info once per module, instead
 of once per function.  This speeds up bcwriting on 447.dealII from 10.16s to
 6.81s (49%).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34132 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Bytecode/Writer/SlotCalculator.cpp | 22 +++++++---------------
 1 file changed, 7 insertions(+), 15 deletions(-)

diff --git a/lib/Bytecode/Writer/SlotCalculator.cpp b/lib/Bytecode/Writer/SlotCalculator.cpp
index b239aeb7674..00df27f7c69 100644
--- a/lib/Bytecode/Writer/SlotCalculator.cpp
+++ b/lib/Bytecode/Writer/SlotCalculator.cpp
@@ -181,6 +181,13 @@ void SlotCalculator::processModule() {
       }
   }
 
+    
+  // Compute the ModuleLevel entries.
+  ModuleLevel.resize(getNumPlanes());
+  for (unsigned i = 0, e = getNumPlanes(); i != e; ++i)
+    ModuleLevel[i] = getPlane(i).size();
+  ModuleTypeLevel = Types.size();
+    
   SC_DEBUG("end processModule!\n");
 }
 
@@ -278,17 +285,8 @@ unsigned SlotCalculator::getOrCreateTypeSlot(const Type *Ty) {
 
 
 void SlotCalculator::incorporateFunction(const Function *F) {
-  assert((ModuleLevel.empty() ||
-          ModuleTypeLevel == 0) && "Module already incorporated!");
-  
   SC_DEBUG("begin processFunction!\n");
   
-  // Update the ModuleLevel entries to be accurate.
-  ModuleLevel.resize(getNumPlanes());
-  for (unsigned i = 0, e = getNumPlanes(); i != e; ++i)
-    ModuleLevel[i] = getPlane(i).size();
-  ModuleTypeLevel = Types.size();
-  
   // Iterate over function arguments, adding them to the value table...
   for(Function::const_arg_iterator I = F->arg_begin(), E = F->arg_end();
       I != E; ++I)
@@ -309,8 +307,6 @@ void SlotCalculator::incorporateFunction(const Function *F) {
 }
 
 void SlotCalculator::purgeFunction() {
-  assert((ModuleLevel.size() != 0 ||
-          ModuleTypeLevel != 0) && "Module not incorporated!");
   unsigned NumModuleTypes = ModuleLevel.size();
   
   SC_DEBUG("begin purgeFunction!\n");
@@ -332,10 +328,6 @@ void SlotCalculator::purgeFunction() {
     }
   }
   
-  // We don't need this state anymore, free it up.
-  ModuleLevel.clear();
-  ModuleTypeLevel = 0;
-  
   // Finally, remove any type planes defined by the function...
   while (Table.size() > NumModuleTypes) {
     TypePlane &Plane = Table.back();