1 ; RUN: opt < %s -passes=instcombine -S | FileCheck %s
3 ; Check that SimplifyLibCalls do not (crash or) emit a library call if user
4 ; has made a function alias with the same name.
6 %struct._IO_FILE = type { i32, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, i32, i32, i64, i16, i8, [1 x i8], ptr, i64, ptr, ptr, ptr, ptr, i64, i32, [20 x i8] }
7 %struct._IO_marker = type { ptr, ptr, i32 }
9 @stderr = external global ptr, align 8
10 @.str = private constant [8 x i8] c"crash!\0A\00", align 1
12 @fwrite = alias i64 (ptr, i64, i64, ptr), ptr @__fwrite_alias
14 define i64 @__fwrite_alias(ptr %ptr, i64 %size, i64 %n, ptr %s) {
15 ; CHECK-LABEL: @__fwrite_alias(
17 ; CHECK-NEXT: ret i64 0
20 %ptr.addr = alloca ptr, align 8
21 %size.addr = alloca i64, align 8
22 %n.addr = alloca i64, align 8
23 %s.addr = alloca ptr, align 8
24 store ptr %ptr, ptr %ptr.addr, align 8
25 store i64 %size, ptr %size.addr, align 8
26 store i64 %n, ptr %n.addr, align 8
27 store ptr %s, ptr %s.addr, align 8
33 ; CHECK-NOT: call i64 @fwrite(
34 ; CHECK: call {{.*}} @fprintf(
37 %retval = alloca i32, align 4
38 store i32 0, ptr %retval, align 4
39 %0 = load ptr, ptr @stderr, align 8
40 %call = call i32 (ptr, ptr, ...) @fprintf(ptr %0, ptr @.str)
44 declare i32 @fprintf(ptr, ptr, ...)