1; Test that the strncat libcall simplifier works correctly. 2; 3; RUN: opt < %s -passes=instcombine -S | FileCheck %s 4 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] zeroinitializer 9@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 @strncat 17; CHECK: call i32 @puts 18 19 %target = alloca [1024 x i8] 20 store i8 0, ptr %target 21 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 0 33} 34