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annotate test/Transforms/InstCombine/cast-mul-select.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 3a76565eade5
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95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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1 ; RUN: opt < %s -instcombine -S | FileCheck %s
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2
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3 target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32"
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4
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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5 define i32 @mul(i32 %x, i32 %y) {
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6 %A = trunc i32 %x to i8
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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7 %B = trunc i32 %y to i8
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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8 %C = mul i8 %A, %B
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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9 %D = zext i8 %C to i32
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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10 ret i32 %D
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11 ; CHECK: %C = mul i32 %x, %y
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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12 ; CHECK: %D = and i32 %C, 255
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13 ; CHECK: ret i32 %D
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14 }
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15
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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16 define i32 @select1(i1 %cond, i32 %x, i32 %y, i32 %z) {
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17 %A = trunc i32 %x to i8
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18 %B = trunc i32 %y to i8
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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19 %C = trunc i32 %z to i8
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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20 %D = add i8 %A, %B
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21 %E = select i1 %cond, i8 %C, i8 %D
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22 %F = zext i8 %E to i32
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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23 ret i32 %F
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24 ; CHECK: %D = add i32 %x, %y
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25 ; CHECK: %E = select i1 %cond, i32 %z, i32 %D
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26 ; CHECK: %F = and i32 %E, 255
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27 ; CHECK: ret i32 %F
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28 }
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29
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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30 define i8 @select2(i1 %cond, i8 %x, i8 %y, i8 %z) {
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31 %A = zext i8 %x to i32
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32 %B = zext i8 %y to i32
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33 %C = zext i8 %z to i32
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34 %D = add i32 %A, %B
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35 %E = select i1 %cond, i32 %C, i32 %D
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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36 %F = trunc i32 %E to i8
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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37 ret i8 %F
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38 ; CHECK: %D = add i8 %x, %y
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39 ; CHECK: %E = select i1 %cond, i8 %z, i8 %D
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40 ; CHECK: ret i8 %E
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41 }