From 9c42a8d43e04084b4613c83469d6cdb70d789322 Mon Sep 17 00:00:00 2001 From: Erik Pilkington Date: Thu, 23 Feb 2017 21:08:08 +0000 Subject: [ObjC][CodeGen] CodeGen support for @available. CodeGens uses of @available into calls to the compiler-rt function __isOSVersionAtLeast. This commit is part of a feature that I proposed here: http://lists.llvm.org/pipermail/cfe-dev/2016-July/049851.html Differential revision: https://reviews.llvm.org/D27827 llvm-svn: 296015 --- clang/lib/CodeGen/CGExprScalar.cpp | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) (limited to 'clang/lib/CodeGen/CGExprScalar.cpp') diff --git a/clang/lib/CodeGen/CGExprScalar.cpp b/clang/lib/CodeGen/CGExprScalar.cpp index 12b14bea0e6..63031d44644 100644 --- a/clang/lib/CodeGen/CGExprScalar.cpp +++ b/clang/lib/CodeGen/CGExprScalar.cpp @@ -300,6 +300,24 @@ public: return V; } + Value *VisitObjCAvailabilityCheckExpr(ObjCAvailabilityCheckExpr *E) { + VersionTuple Version = E->getVersion(); + + // If we're checking for a platform older than our minimum deployment + // target, we can fold the check away. + if (Version <= CGF.CGM.getTarget().getPlatformMinVersion()) + return llvm::ConstantInt::get(Builder.getInt1Ty(), 1); + + Optional Min = Version.getMinor(), SMin = Version.getSubminor(); + llvm::Value *Args[] = { + llvm::ConstantInt::get(CGF.CGM.Int32Ty, Version.getMajor()), + llvm::ConstantInt::get(CGF.CGM.Int32Ty, Min ? *Min : 0), + llvm::ConstantInt::get(CGF.CGM.Int32Ty, SMin ? *SMin : 0), + }; + + return CGF.EmitBuiltinAvailable(Args); + } + Value *VisitArraySubscriptExpr(ArraySubscriptExpr *E); Value *VisitShuffleVectorExpr(ShuffleVectorExpr *E); Value *VisitConvertVectorExpr(ConvertVectorExpr *E); -- cgit v1.2.3