forked from OSchip/llvm-project
31 lines
884 B
LLVM
31 lines
884 B
LLVM
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; RUN: opt -passes='loop(licm),adce,loop(licm)' -S < %s | FileCheck %s
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;
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; XFAIL: *
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; REQUIRES: asserts
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;
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; This test demonstrates a bug in ADCE's work with loop info. It does some
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; changes that make loop's block unreachable, but never bothers to update
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; loop info accordingly.
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128-ni:1-p2:32:8:8:32-ni:2"
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target triple = "x86_64-unknown-linux-gnu"
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define void @test() {
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; CHECK-LABEL: test
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bb:
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br label %bb2
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bb1: ; preds = %bb4
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ret void
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bb2: ; preds = %bb4, %bb
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br i1 undef, label %bb4, label %bb3
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bb3: ; preds = %bb2
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br label %bb4
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bb4: ; preds = %bb3, %bb2
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br i1 undef, label %bb1, label %bb2
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}
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