Add invariant.load metadata to loads from selector references. Allows these loads to later be moved/combined in the optimizer. Fixes <rdar://problem/6027699>
llvm-svn: 144318
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@ -5887,7 +5887,12 @@ llvm::Value *CGObjCNonFragileABIMac::EmitSelector(CGBuilderTy &Builder,
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if (lval)
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return Entry;
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return Builder.CreateLoad(Entry);
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llvm::LoadInst* LI = Builder.CreateLoad(Entry);
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LI->setMetadata(CGM.getModule().getMDKindID("invariant.load"),
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llvm::MDNode::get(VMContext,
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ArrayRef<llvm::Value*>()));
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return LI;
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}
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/// EmitObjCIvarAssign - Code gen for assigning to a __strong object.
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/// objc_assign_ivar (id src, id *dst, ptrdiff_t)
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@ -0,0 +1,9 @@
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// RUN: %clang_cc1 -triple x86_64-apple-darwin11 -emit-llvm -fblocks -o - %s | FileCheck %s
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// rdar://6027699
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void test(id x) {
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// CHECK: load i8** @"\01L_OBJC_SELECTOR_REFERENCES_", !invariant.load
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// CHECK: @objc_msgSend
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[x foo];
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}
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