From 3a3465b71db858723988f61d72b7135e6dff329b Mon Sep 17 00:00:00 2001 From: John McCall Date: Wed, 15 Jun 2011 20:36:13 +0000 Subject: Add a new function attribute, nonlazybind, which inhibits lazy-loading optimizations when emitting calls to the function; instead those calls may use faster relocations which require the function to be immediately resolved upon loading the dynamic object featuring the call. This is useful when it is known that the function will be called frequently and pervasively and therefore there is no merit in delaying binding of the function. Currently only implemented for x86-64, where it turns into a call through the global offset table. Patch by Dan Gohman, who assures me that he's going to add LangRef documentation for this once it's committed. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133080 91177308-0d34-0410-b5e6-96231b3b80d8 --- include/llvm/Attributes.h | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'include') diff --git a/include/llvm/Attributes.h b/include/llvm/Attributes.h index 8b69d6ecc1..233eab8bf1 100644 --- a/include/llvm/Attributes.h +++ b/include/llvm/Attributes.h @@ -69,6 +69,9 @@ const Attributes Hotpatch = 1<<29; ///< Function should have special ///'hotpatch' sequence in prologue const Attributes UWTable = 1<<30; ///< Function must be in a unwind ///table +const Attributes NonLazyBind = 1U<<31; ///< Function is called early and/or + /// often, so lazy binding isn't + /// worthwhile. /// Note that uwtable is about the ABI or the user mandating an entry in the /// unwind table. The nounwind attribute is about an exception passing by the @@ -90,7 +93,7 @@ const Attributes ParameterOnly = ByVal | Nest | StructRet | NoCapture; const Attributes FunctionOnly = NoReturn | NoUnwind | ReadNone | ReadOnly | NoInline | AlwaysInline | OptimizeForSize | StackProtect | StackProtectReq | NoRedZone | NoImplicitFloat | Naked | InlineHint | StackAlignment | - Hotpatch | UWTable; + Hotpatch | UWTable | NonLazyBind; /// @brief Parameter attributes that do not apply to vararg call arguments. const Attributes VarArgsIncompatible = StructRet; -- cgit v1.2.3