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Imported Upstream version 5.18.0.167
Former-commit-id: 289509151e0fee68a1b591a20c9f109c3c789d3a
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; Test that the strcat libcall simplifier works correctly per the
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; bug found in PR3661.
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;
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; RUN: opt < %s -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 i8* @strcat(i8*, i8*)
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declare i32 @puts(i8*)
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define i32 @main() {
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; CHECK-LABEL: @main(
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; CHECK-NOT: call i8* @strcat
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; CHECK: call i32 @puts
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%target = alloca [1024 x i8]
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%arg1 = getelementptr [1024 x i8], [1024 x i8]* %target, i32 0, i32 0
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store i8 0, i8* %arg1
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; rslt1 = strcat(target, "hello\00")
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%arg2 = getelementptr [6 x i8], [6 x i8]* @hello, i32 0, i32 0
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%rslt1 = call i8* @strcat(i8* %arg1, i8* %arg2)
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; rslt2 = strcat(rslt1, "\00")
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%arg3 = getelementptr [1 x i8], [1 x i8]* @null, i32 0, i32 0
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%rslt2 = call i8* @strcat(i8* %rslt1, i8* %arg3)
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; rslt3 = strcat(rslt2, "\00hello\00")
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%arg4 = getelementptr [7 x i8], [7 x i8]* @null_hello, i32 0, i32 0
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%rslt3 = call i8* @strcat(i8* %rslt2, i8* %arg4)
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call i32 @puts( i8* %rslt3 )
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ret i32 0
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}
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