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annotate test/Transforms/InstCombine/strcspn-1.ll @ 147:c2174574ed3a

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LLVM 10
author Shinji KONO <kono@ie.u-ryukyu.ac.jp>
date Wed, 14 Aug 2019 16:55:33 +0900
parents afa8332a0e37
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 ; Test that the strcspn 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: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-n8:16:32:64-S128"
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6
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7 @abcba = constant [6 x i8] c"abcba\00"
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8 @abc = constant [4 x i8] c"abc\00"
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9 @null = constant [1 x i8] zeroinitializer
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10
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11 declare i64 @strcspn(i8*, i8*)
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12
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13 ; Check strcspn(s, "") -> strlen(s).
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14
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15 define i64 @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 i64 @strcspn(i8* %str, i8* %pat)
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20 ; CHECK-NEXT: [[VAR:%[a-z]+]] = call i64 @strlen(i8* %str)
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21 ret i64 %ret
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22 ; CHECK-NEXT: ret i64 [[VAR]]
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23 }
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24
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25 ; Check strcspn("", s) -> 0.
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26
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27 define i64 @test_simplify2(i8* %pat) {
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28 ; CHECK-LABEL: @test_simplify2(
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29 %str = getelementptr [1 x i8], [1 x i8]* @null, i32 0, i32 0
0
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30
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31 %ret = call i64 @strcspn(i8* %str, i8* %pat)
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32 ret i64 %ret
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33 ; CHECK-NEXT: ret i64 0
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34 }
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35
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36 ; Check strcspn(s1, s2), where s1 and s2 are constants.
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37
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38 define i64 @test_simplify3() {
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39 ; CHECK-LABEL: @test_simplify3(
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40 %str = getelementptr [6 x i8], [6 x i8]* @abcba, i32 0, i32 0
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41 %pat = getelementptr [4 x i8], [4 x i8]* @abc, i32 0, i32 0
0
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42
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43 %ret = call i64 @strcspn(i8* %str, i8* %pat)
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44 ret i64 %ret
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45 ; CHECK-NEXT: ret i64 0
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46 }
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47
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48 ; Check cases that shouldn't be simplified.
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49
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50 define i64 @test_no_simplify1(i8* %str, i8* %pat) {
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51 ; CHECK-LABEL: @test_no_simplify1(
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52
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53 %ret = call i64 @strcspn(i8* %str, i8* %pat)
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54 ; CHECK-NEXT: %ret = call i64 @strcspn(i8* %str, i8* %pat)
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55 ret i64 %ret
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56 ; CHECK-NEXT: ret i64 %ret
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57 }