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1; Test that the strncat libcall simplifier works correctly.2;3; RUN: opt < %s -passes=instcombine -S | FileCheck %s4 5target 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"6 7@hello = constant [6 x i8] c"hello\00"8@null = constant [1 x i8] zeroinitializer9@null_hello = constant [7 x i8] c"\00hello\00"10 11declare ptr @strncat(ptr, ptr, i32)12declare i32 @puts(ptr)13 14define i32 @main() {15; CHECK-LABEL: @main(16; CHECK-NOT: call ptr @strncat17; CHECK: call i32 @puts18 19 %target = alloca [1024 x i8]20 store i8 0, ptr %target21 22 ; rslt1 = strncat(target, "hello\00")23 %rslt1 = call ptr @strncat(ptr %target, ptr @hello, i32 6)24 25 ; rslt2 = strncat(rslt1, "\00")26 %rslt2 = call ptr @strncat(ptr %rslt1, ptr @null, i32 42)27 28 ; rslt3 = strncat(rslt2, "\00hello\00")29 %rslt3 = call ptr @strncat(ptr %rslt2, ptr @null_hello, i32 42)30 31 call i32 @puts(ptr %rslt3)32 ret i32 033}34