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annotate test/Transforms/JumpThreading/no-irreducible-loops.ll @ 100:7d135dc70f03 LLVM 3.9

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LLVM 3.9
author Miyagi Mitsuki <e135756@ie.u-ryukyu.ac.jp>
date Tue, 26 Jan 2016 22:53:40 +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 ; RUN: opt < %s -jump-threading -loop-rotate -instcombine -indvars -loop-unroll -simplifycfg -S -verify-dom-info -verify-loop-info > %t
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2 ; RUN: grep "store volatile" %t | count 3
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3 ; RUN: not grep "br label" %t
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5 ; Jump threading should not prevent this loop from being unrolled.
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7 target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
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8 target triple = "i386-apple-darwin9.6"
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9 @v1 = external global i32 ; <i32*> [#uses=2]
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10
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11 define i32 @unroll() nounwind {
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12 entry:
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13 br label %bb4
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14
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15 bb: ; preds = %bb4
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16 %0 = icmp eq i32 %i.0, 0 ; <i1> [#uses=1]
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17 br i1 %0, label %bb1, label %bb2
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18
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19 bb1: ; preds = %bb
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20 store volatile i32 1000, i32* @v1, align 4
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21 br label %bb3
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22
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23 bb2: ; preds = %bb
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24 store volatile i32 1001, i32* @v1, align 4
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25 br label %bb3
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27 bb3: ; preds = %bb2, %bb1
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28 %1 = add i32 %i.0, 1 ; <i32> [#uses=1]
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29 br label %bb4
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31 bb4: ; preds = %bb3, %entry
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32 %i.0 = phi i32 [ 0, %entry ], [ %1, %bb3 ] ; <i32> [#uses=3]
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33 %2 = icmp sgt i32 %i.0, 2 ; <i1> [#uses=1]
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34 br i1 %2, label %bb5, label %bb
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35
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36 bb5: ; preds = %bb4
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37 ret i32 0
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38 }