derek.holloway
7502bf64a4
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36 lines
1.2 KiB
LLVM
36 lines
1.2 KiB
LLVM
; RUN: opt < %s -passes='print<loopnest>' -disable-output 2>&1 | FileCheck %s
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; Test that the loop nest analysis is able to analyze an infinite loop in a loop nest.
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define void @test1(ptr %A, i1 %cond) {
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; CHECK-LABEL: IsPerfect=true, Depth=1, OutermostLoop: for.inner, Loops: ( for.inner )
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; CHECK-LABEL: IsPerfect=false, Depth=2, OutermostLoop: for.outer, Loops: ( for.outer for.inner )
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; CHECK-LABEL: IsPerfect=true, Depth=1, OutermostLoop: for.infinite, Loops: ( for.infinite )
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entry:
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br label %for.outer
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for.outer:
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%i = phi i64 [ 0, %entry ], [ %inc_i, %for.outer.latch ]
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br i1 %cond, label %for.inner, label %for.infinite
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for.inner:
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%j = phi i64 [ 0, %for.outer ], [ %inc_j, %for.inner ]
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%arrayidx_i = getelementptr inbounds ptr, ptr %A, i64 %i
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%0 = load ptr, ptr %arrayidx_i, align 8
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%arrayidx_j = getelementptr inbounds i32, ptr %0, i64 %j
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store i32 0, ptr %arrayidx_j, align 4
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%inc_j = add nsw i64 %j, 1
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%cmp_j = icmp slt i64 %inc_j, 100
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br i1 %cmp_j, label %for.inner, label %for.outer.latch
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for.infinite:
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br label %for.infinite
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for.outer.latch:
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%inc_i = add nsw i64 %i, 1
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%cmp_i = icmp slt i64 %inc_i, 100
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br i1 %cmp_i, label %for.outer, label %for.end
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for.end:
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ret void
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}
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