Give CloneBasicBlock an optional function argument to specify which function

to add the cloned block to.  This allows the block to be added to the function
immediately, and all of the instructions to be immediately added to the function
symbol table, which speeds up the inliner from 3.7 -> 3.38s on the PR209.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11107 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 7 insertions, 9 deletions

diff --git a/lib/Transforms/Utils/CloneTrace.cpp b/lib/Transforms/Utils/CloneTrace.cpp
index 61186d38f9..7cdb20e18f 100644
--- a/lib/Transforms/Utils/CloneTrace.cpp
+++ b/lib/Transforms/Utils/CloneTrace.cpp
@@ -7,11 +7,11 @@
 // 
 //===----------------------------------------------------------------------===//
 //
-// This file implements the CloneTrace interface, which is used 
-// when writing runtime optimizations. It takes a vector of basic blocks
-// clones the basic blocks, removes internal phi nodes, adds it to the
-// same function as the original (although there is no jump to it) and 
-// returns the new vector of basic blocks.
+// This file implements the CloneTrace interface, which is used when writing
+// runtime optimizations. It takes a vector of basic blocks clones the basic
+// blocks, removes internal phi nodes, adds it to the same function as the
+// original (although there is no jump to it) and returns the new vector of
+// basic blocks.
 //
 //===----------------------------------------------------------------------===//
 
@@ -34,7 +34,8 @@ llvm::CloneTrace(const std::vector<BasicBlock*> &origTrace) {
 	End = origTrace.end(); T != End; ++T) {
 
     //Clone Basic Block
-    BasicBlock *clonedBlock = CloneBasicBlock(*T, ValueMap);
+    BasicBlock *clonedBlock =
+      CloneBasicBlock(*T, ValueMap, ".tr", (*T)->getParent());
     
     //Add it to our new trace
     clonedTrace.push_back(clonedBlock);
@@ -42,9 +43,6 @@ llvm::CloneTrace(const std::vector<BasicBlock*> &origTrace) {
     //Add this new mapping to our Value Map
     ValueMap[*T] = clonedBlock;
 
-    //Add this cloned BB to the old BB's function
-    (*T)->getParent()->getBasicBlockList().push_back(clonedBlock);
-
     //Loop over the phi instructions and delete operands
     //that are from blocks not in the trace
     //only do this if we are NOT the first block