commit 35f18a5e8b5a434894a4886ed98f3dbaa3b895c0
author Bill Wendling <isanbard@gmail.com> Tue Feb 07 00:04:27 2012 +0000
committer Bill Wendling <isanbard@gmail.com> Tue Feb 07 00:04:27 2012 +0000
tree 409ad5f215852bc7700c1e7b05bcad485491077d
parent fd3e5ef640df089a1e717097cdb599eb9dd32ec4

Use a SmallVector instead of std::vector. This improves compilation time in
445.gobmk by ~1.7%.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@149935 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/CGExprConstant.cpp

diff --git a/lib/CodeGen/CGExprConstant.cpp b/lib/CodeGen/CGExprConstant.cpp
index f0b20c3..ee0d9a4 100644
--- a/lib/CodeGen/CGExprConstant.cpp
+++ b/lib/CodeGen/CGExprConstant.cpp
@@ -40,7 +40,7 @@
   bool Packed;
   CharUnits NextFieldOffsetInChars;
   CharUnits LLVMStructAlignment;
-  std::vector<llvm::Constant *> Elements;
+  SmallVector<llvm::Constant *, 16> Elements;
 public:
   static llvm::Constant *BuildStruct(CodeGenModule &CGM, CodeGenFunction *CGF,
                                      InitListExpr *ILE);
@@ -301,7 +301,7 @@
 }
 
 void ConstStructBuilder::ConvertStructToPacked() {
-  std::vector<llvm::Constant *> PackedElements;
+  SmallVector<llvm::Constant *, 16> PackedElements;
   CharUnits ElementOffsetInChars = CharUnits::Zero();
 
   for (unsigned i = 0, e = Elements.size(); i != e; ++i) {
@@ -333,7 +333,7 @@
   assert(ElementOffsetInChars == NextFieldOffsetInChars &&
          "Packing the struct changed its size!");
 
-  Elements = PackedElements;
+  Elements.swap(PackedElements);
   LLVMStructAlignment = CharUnits::One();
   Packed = true;
 }
@@ -1172,7 +1172,7 @@
 
 static void
 FillInNullDataMemberPointers(CodeGenModule &CGM, QualType T,
-                             std::vector<llvm::Constant *> &Elements,
+                             SmallVectorImpl<llvm::Constant *> &Elements,
                              uint64_t StartOffset) {
   assert(StartOffset % CGM.getContext().getCharWidth() == 0 && 
          "StartOffset not byte aligned!");
@@ -1353,7 +1353,7 @@
   unsigned numBaseElements = baseArrayType->getNumElements();
 
   // Fill in null data member pointers.
-  std::vector<llvm::Constant *> baseElements(numBaseElements);
+  SmallVector<llvm::Constant *, 16> baseElements(numBaseElements);
   FillInNullDataMemberPointers(CGM, CGM.getContext().getTypeDeclType(base),
                                baseElements, 0);