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annotate test/Transforms/InstCombine/strcat-1.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
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children afa8332a0e37
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95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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1 ; Test that the strcat libcall simplifier works correctly per the
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2 ; bug found in PR3661.
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3 ;
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4 ; RUN: opt < %s -instcombine -S | FileCheck %s
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5
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6 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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7
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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8 @hello = constant [6 x i8] c"hello\00"
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9 @null = constant [1 x i8] zeroinitializer
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10 @null_hello = constant [7 x i8] c"\00hello\00"
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11
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12 declare i8* @strcat(i8*, i8*)
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13 declare i32 @puts(i8*)
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14
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15 define i32 @main() {
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16 ; CHECK-LABEL: @main(
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17 ; CHECK-NOT: call i8* @strcat
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18 ; CHECK: call i32 @puts
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19
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20 %target = alloca [1024 x i8]
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21 %arg1 = getelementptr [1024 x i8]* %target, i32 0, i32 0
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22 store i8 0, i8* %arg1
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23
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24 ; rslt1 = strcat(target, "hello\00")
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25 %arg2 = getelementptr [6 x i8]* @hello, i32 0, i32 0
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26 %rslt1 = call i8* @strcat(i8* %arg1, i8* %arg2)
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27
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28 ; rslt2 = strcat(rslt1, "\00")
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29 %arg3 = getelementptr [1 x i8]* @null, i32 0, i32 0
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30 %rslt2 = call i8* @strcat(i8* %rslt1, i8* %arg3)
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31
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32 ; rslt3 = strcat(rslt2, "\00hello\00")
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33 %arg4 = getelementptr [7 x i8]* @null_hello, i32 0, i32 0
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34 %rslt3 = call i8* @strcat(i8* %rslt2, i8* %arg4)
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35
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36 call i32 @puts( i8* %rslt3 )
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37 ret i32 0
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38 }