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annotate test/Transforms/InstCombine/strpbrk-1.ll @ 121:803732b1fca8

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LLVM 5.0
author kono
date Fri, 27 Oct 2017 17:07:41 +0900
parents afa8332a0e37
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 ; Test that the strpbrk library call simplifier works correctly.
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2 ;
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3 ; RUN: opt < %s -instcombine -S | FileCheck %s
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4
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5 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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6
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7 @hello = constant [12 x i8] c"hello world\00"
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8 @w = constant [2 x i8] c"w\00"
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9 @null = constant [1 x i8] zeroinitializer
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10
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11 declare i8* @strpbrk(i8*, i8*)
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12
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13 ; Check strpbrk(s, "") -> NULL.
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14
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15 define i8* @test_simplify1(i8* %str) {
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16 ; CHECK-LABEL: @test_simplify1(
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17 %pat = getelementptr [1 x i8], [1 x i8]* @null, i32 0, i32 0
0
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18
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19 %ret = call i8* @strpbrk(i8* %str, i8* %pat)
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20 ret i8* %ret
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21 ; CHECK-NEXT: ret i8* null
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22 }
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23
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24 ; Check strpbrk("", s) -> NULL.
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25
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26 define i8* @test_simplify2(i8* %pat) {
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27 ; CHECK-LABEL: @test_simplify2(
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28 %str = getelementptr [1 x i8], [1 x i8]* @null, i32 0, i32 0
0
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29
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30 %ret = call i8* @strpbrk(i8* %str, i8* %pat)
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31 ret i8* %ret
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32 ; CHECK-NEXT: ret i8* null
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33 }
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34
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35 ; Check strpbrk(s1, s2), where s1 and s2 are constants.
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36
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37 define i8* @test_simplify3() {
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38 ; CHECK-LABEL: @test_simplify3(
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39 %str = getelementptr [12 x i8], [12 x i8]* @hello, i32 0, i32 0
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40 %pat = getelementptr [2 x i8], [2 x i8]* @w, i32 0, i32 0
0
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41
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42 %ret = call i8* @strpbrk(i8* %str, i8* %pat)
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43 ret i8* %ret
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44 ; CHECK-NEXT: ret i8* getelementptr inbounds ([12 x i8], [12 x i8]* @hello, i32 0, i32 6)
0
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45 }
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46
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47 ; Check strpbrk(s, "a") -> strchr(s, 'a').
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48
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49 define i8* @test_simplify4(i8* %str) {
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50 ; CHECK-LABEL: @test_simplify4(
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51 %pat = getelementptr [2 x i8], [2 x i8]* @w, i32 0, i32 0
0
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52
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53 %ret = call i8* @strpbrk(i8* %str, i8* %pat)
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54 ; CHECK-NEXT: [[VAR:%[a-z]+]] = call i8* @strchr(i8* %str, i32 119)
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55 ret i8* %ret
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56 ; CHECK-NEXT: ret i8* [[VAR]]
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57 }
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58
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59 ; Check cases that shouldn't be simplified.
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60
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61 define i8* @test_no_simplify1(i8* %str, i8* %pat) {
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62 ; CHECK-LABEL: @test_no_simplify1(
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63
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64 %ret = call i8* @strpbrk(i8* %str, i8* %pat)
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65 ; CHECK-NEXT: %ret = call i8* @strpbrk(i8* %str, i8* %pat)
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66 ret i8* %ret
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67 ; CHECK-NEXT: ret i8* %ret
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68 }