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22 lines
473 B
LLVM
22 lines
473 B
LLVM
; RUN: opt -S -basicaa -objc-arc -gvn < %s | FileCheck %s
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@x = common global i8* null, align 8
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declare i8* @objc_retain(i8*)
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; GVN should be able to eliminate this redundant load, with ARC-specific
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; alias analysis.
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; CHECK: @foo
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; CHECK-NEXT: entry:
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; CHECK-NEXT: %s = load i8** @x
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; CHECK-NOT: load
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; CHECK: ret i8* %s
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define i8* @foo(i32 %n) nounwind {
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entry:
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%s = load i8** @x
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%0 = tail call i8* @objc_retain(i8* %s) nounwind
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%t = load i8** @x
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ret i8* %s
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}
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