forked from OSchip/llvm-project
61 lines
2.1 KiB
LLVM
61 lines
2.1 KiB
LLVM
; RUN: opt < %s -simplify-libcalls -S | FileCheck %s
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; PR5783
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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"
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target triple = "i386-apple-darwin9.0"
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@.str = private constant [1 x i8] zeroinitializer ; <[1 x i8]*> [#uses=1]
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@.str1 = private constant [2 x i8] c"a\00" ; <[2 x i8]*> [#uses=1]
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@.str2 = private constant [6 x i8] c"abcde\00" ; <[6 x i8]*> [#uses=1]
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@.str3 = private constant [4 x i8] c"bcd\00" ; <[4 x i8]*> [#uses=1]
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define i8* @test1(i8* %P) nounwind readonly {
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entry:
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%call = tail call i8* @strstr(i8* %P, i8* getelementptr inbounds ([1 x i8]* @.str, i32 0, i32 0)) nounwind ; <i8*> [#uses=1]
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ret i8* %call
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; strstr(P, "") -> P
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; CHECK: @test1
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; CHECK: ret i8* %P
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}
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declare i8* @strstr(i8*, i8* nocapture) nounwind readonly
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define i8* @test2(i8* %P) nounwind readonly {
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entry:
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%call = tail call i8* @strstr(i8* %P, i8* getelementptr inbounds ([2 x i8]* @.str1, i32 0, i32 0)) nounwind ; <i8*> [#uses=1]
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ret i8* %call
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; strstr(P, "a") -> strchr(P, 'a')
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; CHECK: @test2
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; CHECK: @strchr(i8* %P, i32 97)
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}
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define i8* @test3(i8* nocapture %P) nounwind readonly {
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entry:
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%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]
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ret i8* %call
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; strstr("abcde", "bcd") -> "abcde"+1
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; CHECK: @test3
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; CHECK: getelementptr inbounds ([6 x i8]* @.str2, i32 0, i64 1)
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}
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define i8* @test4(i8* %P) nounwind readonly {
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entry:
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%call = tail call i8* @strstr(i8* %P, i8* %P) nounwind ; <i8*> [#uses=1]
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ret i8* %call
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; strstr(P, P) -> P
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; CHECK: @test4
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; CHECK: ret i8* %P
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}
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define i1 @test5(i8* %P, i8* %Q) nounwind readonly {
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entry:
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%call = tail call i8* @strstr(i8* %P, i8* %Q) nounwind ; <i8*> [#uses=1]
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%cmp = icmp eq i8* %call, %P
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ret i1 %cmp
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; CHECK: @test5
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; CHECK: [[LEN:%[a-z]+]] = call {{i[0-9]+}} @strlen(i8* %Q)
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; CHECK: [[NCMP:%[a-z]+]] = call {{i[0-9]+}} @strncmp(i8* %P, i8* %Q, {{i[0-9]+}} [[LEN]])
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; CHECK: icmp eq {{i[0-9]+}} [[NCMP]], 0
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; CHECK: ret i1
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}
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