From ff8f9ec8336c62b5e3504e2a394f4b25c0cb1963 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Tue, 31 Jan 2012 06:13:55 +0000
Subject: ConstantArray::get() (for strings) is going away, use
 ConstantDataArray::getString instead.

Many instances of ConstantArray::get() could be moved to
use more efficient ConstantDataArray methods that avoid a ton
of intermediate Constant*'s for each element (e.g.
GetConstantArrayFromStringLiteral).  I don't plan on doing this
in the short-term though.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@149363 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/CodeGenModule.cpp | 51 ++++++++++++++++++++++---------------------
 1 file changed, 26 insertions(+), 25 deletions(-)

(limited to 'lib/CodeGen/CodeGenModule.cpp')

diff --git a/lib/CodeGen/CodeGenModule.cpp b/lib/CodeGen/CodeGenModule.cpp
index 67059016f7..196ab5dd39 100644
--- a/lib/CodeGen/CodeGenModule.cpp
+++ b/lib/CodeGen/CodeGenModule.cpp
@@ -689,7 +689,7 @@ llvm::Constant *CodeGenModule::EmitAnnotationString(llvm::StringRef Str) {
     return i->second;
 
   // Not found yet, create a new global.
-  llvm::Constant *s = llvm::ConstantArray::get(getLLVMContext(), Str, true);
+  llvm::Constant *s = llvm::ConstantDataArray::getString(getLLVMContext(), Str);
   llvm::GlobalValue *gv = new llvm::GlobalVariable(getModule(), s->getType(),
     true, llvm::GlobalValue::PrivateLinkage, s, ".str");
   gv->setSection(AnnotationSection);
@@ -1853,7 +1853,8 @@ CodeGenModule::GetAddrOfConstantCFString(const StringLiteral *Literal) {
     llvm::ConstantInt::get(Ty, 0x07C8);
 
   // String pointer.
-  llvm::Constant *C = llvm::ConstantArray::get(VMContext, Entry.getKey().str());
+  llvm::Constant *C = llvm::ConstantDataArray::getString(VMContext,
+                                                         Entry.getKey());
 
   llvm::GlobalValue::LinkageTypes Linkage;
   if (isUTF16)
@@ -1985,7 +1986,8 @@ CodeGenModule::GetAddrOfConstantString(const StringLiteral *Literal) {
   Fields[0] = ConstantStringClassRef;
   
   // String pointer.
-  llvm::Constant *C = llvm::ConstantArray::get(VMContext, Entry.getKey().str());
+  llvm::Constant *C =
+    llvm::ConstantDataArray::getString(VMContext, Entry.getKey());
   
   llvm::GlobalValue::LinkageTypes Linkage;
   bool isConstant;
@@ -2081,29 +2083,28 @@ CodeGenModule::GetConstantArrayFromStringLiteral(const StringLiteral *E) {
   // Don't emit it as the address of the string, emit the string data itself
   // as an inline array.
   if (E->getCharByteWidth()==1) {
-    return llvm::ConstantArray::get(VMContext,
+    return llvm::ConstantDataArray::getString(VMContext,
                                     GetStringForStringLiteral(E), false);
-  } else {
-    llvm::ArrayType *AType =
-      cast<llvm::ArrayType>(getTypes().ConvertType(E->getType()));
-    llvm::Type *ElemTy = AType->getElementType();
-    unsigned NumElements = AType->getNumElements();
-    std::vector<llvm::Constant*> Elts;
-    Elts.reserve(NumElements);
-    
-    for(unsigned i=0;i<E->getLength();++i) {
-      unsigned value = E->getCodeUnit(i);
-      llvm::Constant *C = llvm::ConstantInt::get(ElemTy,value,false);
-      Elts.push_back(C);
-    }
-    for(unsigned i=E->getLength();i<NumElements;++i) {
-      llvm::Constant *C = llvm::ConstantInt::get(ElemTy,0,false);
-      Elts.push_back(C);
-    }
-    
-    return llvm::ConstantArray::get(AType, Elts);
   }
-
+  
+  llvm::ArrayType *AType =
+    cast<llvm::ArrayType>(getTypes().ConvertType(E->getType()));
+  llvm::Type *ElemTy = AType->getElementType();
+  unsigned NumElements = AType->getNumElements();
+  std::vector<llvm::Constant*> Elts;
+  Elts.reserve(NumElements);
+  
+  for(unsigned i=0;i<E->getLength();++i) {
+    unsigned value = E->getCodeUnit(i);
+    llvm::Constant *C = llvm::ConstantInt::get(ElemTy,value,false);
+    Elts.push_back(C);
+  }
+  for(unsigned i=E->getLength();i<NumElements;++i) {
+    llvm::Constant *C = llvm::ConstantInt::get(ElemTy,0,false);
+    Elts.push_back(C);
+  }
+  
+  return llvm::ConstantArray::get(AType, Elts);
 }
 
 /// GetAddrOfConstantStringFromLiteral - Return a pointer to a
@@ -2152,7 +2153,7 @@ static llvm::GlobalVariable *GenerateStringLiteral(StringRef str,
                                              unsigned Alignment) {
   // Create Constant for this string literal. Don't add a '\0'.
   llvm::Constant *C =
-      llvm::ConstantArray::get(CGM.getLLVMContext(), str, false);
+      llvm::ConstantDataArray::getString(CGM.getLLVMContext(), str, false);
 
   // Create a global variable for this string
   llvm::GlobalVariable *GV =
-- 
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