1; RUN: opt < %s -simplify-libcalls -S | FileCheck %s 2; PR5783 3 4target 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" 5target 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 12define i8* @test1(i8* %P) nounwind readonly { 13entry: 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 21declare i8* @strstr(i8*, i8* nocapture) nounwind readonly 22 23define i8* @test2(i8* %P) nounwind readonly { 24entry: 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 32define i8* @test3(i8* nocapture %P) nounwind readonly { 33entry: 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 41define i8* @test4(i8* %P) nounwind readonly { 42entry: 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 50define i1 @test5(i8* %P, i8* %Q) nounwind readonly { 51entry: 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