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Summary: LoopRotate doesn't create a faithful clone of an instruction, it may simplify it beforehand. Hence the clone of an instruction that has a MemoryDef associated may not be a definition, but a use or not a memory alternig instruction. Don't rely on the template when the clone may be simplified. Reviewers: george.burgess.iv Subscribers: jlebar, Prazek, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D63355 llvm-svn: 363597
28 lines
838 B
LLVM
28 lines
838 B
LLVM
; RUN: opt -disable-output -loop-rotate -enable-mssa-loop-dependency -verify-memoryssa %s
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; REQUIRES: asserts
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; Function Attrs: nounwind
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define dso_local void @bar() local_unnamed_addr #0 align 32 {
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entry:
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br label %looplabel.exit.i
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looplabel.exit.i: ; preds = %if.end.i, %entry
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%0 = phi i1 (i32*, i32*)* [ @foo, %entry ], [ undef, %if.end.i ]
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%call3.i.i = call zeroext i1 %0(i32* nonnull dereferenceable(16) undef, i32* nonnull undef)
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br i1 %call3.i.i, label %if.end.i, label %label.exit
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if.end.i: ; preds = %looplabel.exit.i
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%tobool.i = icmp eq i32* undef, null
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br label %looplabel.exit.i
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label.exit: ; preds = %looplabel.exit.i
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ret void
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}
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; Function Attrs: readonly
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declare dso_local i1 @foo(i32*, i32*) #1 align 32
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attributes #0 = { nounwind }
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attributes #1 = { readonly }
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