41 lines
970 B
LLVM
41 lines
970 B
LLVM
; RUN: opt < %s -loop-interchange -S | FileCheck %s
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; BB latch1 is the loop latch, but does not exit the loop.
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define void @foo() {
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entry:
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%dest = alloca i16*, align 8
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br label %header1
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header1:
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%0 = phi i16* [ %2, %latch1 ], [ undef, %entry ]
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br i1 false, label %inner, label %loopexit
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inner:
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br i1 undef, label %inner.ph, label %latch1
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inner.ph:
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br label %inner.body
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inner.body:
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%1 = load i16, i16* %0, align 2
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store i16* inttoptr (i64 2 to i16*), i16** %dest, align 8
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br i1 false, label %inner.body, label %inner.loopexit
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inner.loopexit:
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br label %latch1
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latch1:
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%2 = phi i16* [ %0, %inner ], [ undef, %inner.loopexit ]
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br label %header1
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loopexit: ; preds = %header1
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unreachable
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}
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; CHECK-LABEL: inner.body:
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; CHECK: br i1 false, label %inner.body, label %inner.loopexit
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; CHECK: latch1:
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; CHECK-NEXT: %2 = phi i16* [ %0, %inner ], [ undef, %inner.loopexit ]
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; CHECK-NEXT: br label %header1
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