derek.holloway
7502bf64a4
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34 lines
955 B
LLVM
34 lines
955 B
LLVM
; Test that the strncat libcall simplifier works correctly.
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;
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; RUN: opt < %s -passes=instcombine -S | FileCheck %s
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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"
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@hello = constant [6 x i8] c"hello\00"
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@null = constant [1 x i8] zeroinitializer
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@null_hello = constant [7 x i8] c"\00hello\00"
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declare ptr @strncat(ptr, ptr, i32)
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declare i32 @puts(ptr)
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define i32 @main() {
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; CHECK-LABEL: @main(
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; CHECK-NOT: call ptr @strncat
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; CHECK: call i32 @puts
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%target = alloca [1024 x i8]
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store i8 0, ptr %target
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; rslt1 = strncat(target, "hello\00")
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%rslt1 = call ptr @strncat(ptr %target, ptr @hello, i32 6)
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; rslt2 = strncat(rslt1, "\00")
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%rslt2 = call ptr @strncat(ptr %rslt1, ptr @null, i32 42)
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; rslt3 = strncat(rslt2, "\00hello\00")
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%rslt3 = call ptr @strncat(ptr %rslt2, ptr @null_hello, i32 42)
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call i32 @puts(ptr %rslt3)
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ret i32 0
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}
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