builtin id 0 is invalid, don't use a slot for it.
llvm-svn: 44968
diff --git a/clang/CodeGen/CodeGenModule.cpp b/clang/CodeGen/CodeGenModule.cpp
index 47a0081..2df1877 100644
--- a/clang/CodeGen/CodeGenModule.cpp
+++ b/clang/CodeGen/CodeGenModule.cpp
@@ -518,11 +518,13 @@
/// getBuiltinLibFunction
llvm::Function *CodeGenModule::getBuiltinLibFunction(unsigned BuiltinID) {
- if (BuiltinFunctions.size() <= BuiltinID)
- BuiltinFunctions.resize(BuiltinID+1);
+ if (BuiltinID > BuiltinFunctions.size())
+ BuiltinFunctions.resize(BuiltinID);
- // Already available?
- llvm::Function *&FunctionSlot = BuiltinFunctions[BuiltinID];
+ // Cache looked up functions. Since builtin id #0 is invalid we don't reserve
+ // a slot for it.
+ assert(BuiltinID && "Invalid Builtin ID");
+ llvm::Function *&FunctionSlot = BuiltinFunctions[BuiltinID-1];
if (FunctionSlot)
return FunctionSlot;