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      1 ; RUN: llvm-as <%s >%t1
      2 ; RUN: llvm-lto -exported-symbol=_uses_puts -exported-symbol=_uses_printf -o - %t1 | \
      3 ; RUN: llvm-nm - | \
      4 ; RUN: FileCheck %s
      5 ; rdar://problem/16165191
      6 ; runtime library implementations should not be renamed
      7 
      8 target triple = "x86_64-apple-darwin11"
      9 
     10 @str = private unnamed_addr constant [13 x i8] c"hello world\0A\00"
     11 
     12 ; CHECK-NOT: U _puts
     13 ; CHECK: T _uses_printf
     14 ; CHECK: T _uses_puts
     15 define i32 @uses_puts(i32 %i) {
     16 entry:
     17   %s = call i8* @foo(i32 %i)
     18   %ret = call i32 @puts(i8* %s)
     19   ret i32 %ret
     20 }
     21 define i32 @uses_printf(i32 %i) {
     22 entry:
     23   %s = getelementptr [13 x i8]* @str, i64 0, i64 0
     24   call i32 (i8*, ...)* @printf(i8* %s)
     25   ret i32 0
     26 }
     27 
     28 define hidden i32 @printf(i8* readonly nocapture %fmt, ...) {
     29 entry:
     30   %ret = call i32 @bar(i8* %fmt)
     31   ret i32 %ret
     32 }
     33 define hidden i32 @puts(i8* %s) {
     34 entry:
     35   %ret = call i32 @bar(i8* %s)
     36   ret i32 %ret
     37 }
     38 
     39 declare i8* @foo(i32)
     40 declare i32 @bar(i8*)
     41