1 ; RUN: opt < %s -simplify-libcalls -S | FileCheck %s 2 ; PR5783 3 4 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-n8:16:32" 5 target triple = "i386-apple-darwin9.0" 6 7 @.str = private constant [1 x i8] zeroinitializer ; <[1 x i8]*> [#uses=1] 8 @.str1 = private constant [2 x i8] c"a\00" ; <[2 x i8]*> [#uses=1] 9 @.str2 = private constant [6 x i8] c"abcde\00" ; <[6 x i8]*> [#uses=1] 10 @.str3 = private constant [4 x i8] c"bcd\00" ; <[4 x i8]*> [#uses=1] 11 12 define i8* @test1(i8* %P) nounwind readonly { 13 entry: 14 %call = tail call i8* @strstr(i8* %P, i8* getelementptr inbounds ([1 x i8]* @.str, i32 0, i32 0)) nounwind ; <i8*> [#uses=1] 15 ret i8* %call 16 ; strstr(P, "") -> P 17 ; CHECK: @test1 18 ; CHECK: ret i8* %P 19 } 20 21 declare i8* @strstr(i8*, i8* nocapture) nounwind readonly 22 23 define i8* @test2(i8* %P) nounwind readonly { 24 entry: 25 %call = tail call i8* @strstr(i8* %P, i8* getelementptr inbounds ([2 x i8]* @.str1, i32 0, i32 0)) nounwind ; <i8*> [#uses=1] 26 ret i8* %call 27 ; strstr(P, "a") -> strchr(P, 'a') 28 ; CHECK: @test2 29 ; CHECK: @strchr(i8* %P, i32 97) 30 } 31 32 define i8* @test3(i8* nocapture %P) nounwind readonly { 33 entry: 34 %call = tail call i8* @strstr(i8* getelementptr inbounds ([6 x i8]* @.str2, i32 0, i32 0), i8* getelementptr inbounds ([4 x i8]* @.str3, i32 0, i32 0)) nounwind ; <i8*> [#uses=1] 35 ret i8* %call 36 ; strstr("abcde", "bcd") -> "abcde"+1 37 ; CHECK: @test3 38 ; CHECK: getelementptr inbounds ([6 x i8]* @.str2, i32 0, i64 1) 39 } 40 41 define i8* @test4(i8* %P) nounwind readonly { 42 entry: 43 %call = tail call i8* @strstr(i8* %P, i8* %P) nounwind ; <i8*> [#uses=1] 44 ret i8* %call 45 ; strstr(P, P) -> P 46 ; CHECK: @test4 47 ; CHECK: ret i8* %P 48 } 49 50 define i1 @test5(i8* %P, i8* %Q) nounwind readonly { 51 entry: 52 %call = tail call i8* @strstr(i8* %P, i8* %Q) nounwind ; <i8*> [#uses=1] 53 %cmp = icmp eq i8* %call, %P 54 ret i1 %cmp 55 ; CHECK: @test5 56 ; CHECK: [[LEN:%[a-z]+]] = call {{i[0-9]+}} @strlen(i8* %Q) 57 ; CHECK: [[NCMP:%[a-z]+]] = call {{i[0-9]+}} @strncmp(i8* %P, i8* %Q, {{i[0-9]+}} [[LEN]]) 58 ; CHECK: icmp eq {{i[0-9]+}} [[NCMP]], 0 59 ; CHECK: ret i1 60 } 61
