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annotate test/Transforms/IndVarSimplify/preserve-signed-wrap.ll @ 0:95c75e76d11b LLVM3.4

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LLVM 3.4
author Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
date Thu, 12 Dec 2013 13:56:28 +0900
parents
children afa8332a0e37
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95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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1 ; RUN: opt < %s -indvars -S | FileCheck %s
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2
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3 ; Indvars should insert a 64-bit induction variable to eliminate the
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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4 ; sext for the addressing, however it shouldn't eliminate the sext
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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5 ; on the other phi, since that value undergoes signed wrapping.
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6
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7 define void @foo(i32* nocapture %d, i32 %n) nounwind {
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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8 entry:
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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9 %0 = icmp sgt i32 %n, 0 ; <i1> [#uses=1]
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10 br i1 %0, label %bb.nph, label %return
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11
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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12 bb.nph: ; preds = %entry
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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13 br label %bb
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14
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15 ; CHECK: bb:
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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16 ; CHECK: phi i64
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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17 ; CHECK: sext i8
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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18 ; CHECK-NOT: sext
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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19 bb: ; preds = %bb1, %bb.nph
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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20 %i.02 = phi i32 [ %5, %bb1 ], [ 0, %bb.nph ] ; <i32> [#uses=2]
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21 %p.01 = phi i8 [ %4, %bb1 ], [ -1, %bb.nph ] ; <i8> [#uses=2]
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22 %1 = sext i8 %p.01 to i32 ; <i32> [#uses=1]
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23 %2 = sext i32 %i.02 to i64 ; <i64> [#uses=1]
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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24 %3 = getelementptr i32* %d, i64 %2 ; <i32*> [#uses=1]
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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25 store i32 %1, i32* %3, align 4
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26 %4 = add i8 %p.01, 1 ; <i8> [#uses=1]
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27 %5 = add i32 %i.02, 1 ; <i32> [#uses=2]
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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28 br label %bb1
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29
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30 bb1: ; preds = %bb
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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31 %6 = icmp slt i32 %5, %n ; <i1> [#uses=1]
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32 br i1 %6, label %bb, label %bb1.return_crit_edge
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33
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34 bb1.return_crit_edge: ; preds = %bb1
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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35 br label %return
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36
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37 return: ; preds = %bb1.return_crit_edge, %entry
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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38 ret void
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39 }