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annotate test/Transforms/ADCE/2003-04-25-PHIPostDominateProblem.ll @ 121:803732b1fca8

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LLVM 5.0
author kono
date Fri, 27 Oct 2017 17:07:41 +0900
parents 95c75e76d11b
children
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95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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1 ; THis testcase caused an assertion failure because a PHI node did not have
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2 ; entries for it's postdominator. But I think this can only happen when the
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3 ; PHI node is dead, so we just avoid patching up dead PHI nodes.
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5 ; RUN: opt < %s -adce -S | FileCheck %s
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6 ; RUN: opt < %s -adce -adce-remove-loops -S | FileCheck %s
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8 target datalayout = "e-p:32:32"
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10 define void @dead_test8() {
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11 entry:
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12 br label %loopentry
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14 loopentry: ; preds = %endif, %entry
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15 %k.1 = phi i32 [ %k.0, %endif ], [ 0, %entry ] ; <i32> [#uses=1]
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16 br i1 false, label %no_exit, label %return
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18 no_exit: ; preds = %loopentry
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19 ; CHECK: br label %then
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20 br i1 false, label %then, label %else
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22 then: ; preds = %no_exit
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23 br label %endif
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25 else: ; preds = %no_exit
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26 %dec = add i32 %k.1, -1 ; <i32> [#uses=1]
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27 br label %endif
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29 endif: ; preds = %else, %then
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30 %k.0 = phi i32 [ %dec, %else ], [ 0, %then ] ; <i32> [#uses=1]
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31 store i32 2, i32* null
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32 br label %loopentry
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34 return: ; preds = %loopentry
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35 ret void
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36 }
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