[llvm] r176170 - For each function that we optimize we initialize a new list of lib functions. For each function name we malloc memory. This patch changes the Libcall map to use BumpPtrAllocator. Now we malloc only once. This speeds up instcombine by a few % on a large c++ program.

[Nadav Rotem]

Author: nadav
Date: Tue Feb 26 23:53:43 2013
New Revision: 176170

URL: http://llvm.org/viewvc/llvm-project?rev=176170&view=rev
Log:
For each function that we optimize we initialize a new list of lib functions. For each function name we malloc memory. This patch changes the Libcall map to use BumpPtrAllocator. Now we malloc only once. This speeds up instcombine by a few % on a large c++ program.

Modified:
    llvm/trunk/lib/Transforms/Utils/SimplifyLibCalls.cpp

Modified: llvm/trunk/lib/Transforms/Utils/SimplifyLibCalls.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/Utils/SimplifyLibCalls.cpp?rev=176170&r1=176169&r2=176170&view=diff
==============================================================================
--- llvm/trunk/lib/Transforms/Utils/SimplifyLibCalls.cpp (original)
+++ llvm/trunk/lib/Transforms/Utils/SimplifyLibCalls.cpp Tue Feb 26 23:53:43 2013
@@ -23,6 +23,7 @@
 #include "llvm/IR/Intrinsics.h"
 #include "llvm/IR/LLVMContext.h"
 #include "llvm/IR/Module.h"
+#include "llvm/Support/Allocator.h"
 #include "llvm/Target/TargetLibraryInfo.h"
 #include "llvm/Transforms/Utils/BuildLibCalls.h"
 
@@ -1672,7 +1673,7 @@ class LibCallSimplifierImpl {
   const TargetLibraryInfo *TLI;
   const LibCallSimplifier *LCS;
   bool UnsafeFPShrink;
-  StringMap<LibCallOptimization*> Optimizations;
+  StringMap<LibCallOptimization*, BumpPtrAllocator> Optimizations;
 
   // Fortified library call optimizations.
   MemCpyChkOpt MemCpyChk;