From be6c750a8ed11b3c165593c761137901d7730117 Mon Sep 17 00:00:00 2001 From: Pete Cooper Date: Wed, 16 Mar 2016 00:33:21 +0000 Subject: Convert some ObjC msgSends to runtime calls. It is faster to directly call the ObjC runtime for methods such as retain/release instead of sending a message to those functions. This patch adds support for converting messages to retain/release/alloc/autorelease to their equivalent runtime calls. Tests included for the positive case of applying this transformation, negative tests that we ensure we only convert "alloc" to objc_alloc, not "alloc2", and also a driver test to ensure we enable this only for supported runtime versions. Reviewed by John McCall. Differential Revision: http://reviews.llvm.org/D14737 llvm-svn: 263607 --- clang/lib/Driver/Tools.cpp | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'clang/lib/Driver/Tools.cpp') diff --git a/clang/lib/Driver/Tools.cpp b/clang/lib/Driver/Tools.cpp index cb398711631..2849d513df7 100644 --- a/clang/lib/Driver/Tools.cpp +++ b/clang/lib/Driver/Tools.cpp @@ -5284,6 +5284,18 @@ void Clang::ConstructJob(Compilation &C, const JobAction &JA, } + // Allow the user to control whether messages can be converted to runtime + // functions. + if (types::isObjC(InputType)) { + auto *Arg = Args.getLastArg( + options::OPT_fobjc_convert_messages_to_runtime_calls, + options::OPT_fno_objc_convert_messages_to_runtime_calls); + if (Arg && + Arg->getOption().matches( + options::OPT_fno_objc_convert_messages_to_runtime_calls)) + CmdArgs.push_back("-fno-objc-convert-messages-to-runtime-calls"); + } + // -fobjc-infer-related-result-type is the default, except in the Objective-C // rewriter. if (rewriteKind != RK_None) -- cgit v1.2.3