1; Test that the strcat libcall simplifier works correctly per the 2; bug found in PR3661. 3; 4; RUN: opt < %s -passes=instcombine -S | FileCheck %s 5 6target 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" 7 8@hello = constant [6 x i8] c"hello\00" 9@null = constant [1 x i8] zeroinitializer 10@null_hello = constant [7 x i8] c"\00hello\00" 11 12declare ptr @strcat(ptr, ptr) 13declare i32 @puts(ptr) 14 15define i32 @main() { 16; CHECK-LABEL: @main( 17; CHECK-NOT: call ptr @strcat 18; CHECK: call i32 @puts 19 20 %target = alloca [1024 x i8] 21 store i8 0, ptr %target 22 23 ; rslt1 = strcat(target, "hello\00") 24 %rslt1 = call ptr @strcat(ptr %target, ptr @hello) 25 26 ; rslt2 = strcat(rslt1, "\00") 27 %rslt2 = call ptr @strcat(ptr %rslt1, ptr @null) 28 29 ; rslt3 = strcat(rslt2, "\00hello\00") 30 %rslt3 = call ptr @strcat(ptr %rslt2, ptr @null_hello) 31 32 call i32 @puts( ptr %rslt3 ) 33 ret i32 0 34} 35