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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 datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
      9 target triple = "x86_64-apple-darwin11"
     10 
     11 @str = private unnamed_addr constant [13 x i8] c"hello world\0A\00"
     12 
     13 ; CHECK-NOT: U _puts
     14 ; CHECK: T _uses_printf
     15 ; CHECK: T _uses_puts
     16 define i32 @uses_puts(i32 %i) {
     17 entry:
     18   %s = call i8* @foo(i32 %i)
     19   %ret = call i32 @puts(i8* %s)
     20   ret i32 %ret
     21 }
     22 define i32 @uses_printf(i32 %i) {
     23 entry:
     24   %s = getelementptr [13 x i8], [13 x i8]* @str, i64 0, i64 0
     25   call i32 (i8*, ...) @printf(i8* %s)
     26   ret i32 0
     27 }
     28 
     29 define hidden i32 @printf(i8* readonly nocapture %fmt, ...) {
     30 entry:
     31   %ret = call i32 @bar(i8* %fmt)
     32   ret i32 %ret
     33 }
     34 define hidden i32 @puts(i8* %s) {
     35 entry:
     36   %ret = call i32 @bar(i8* %s)
     37   ret i32 %ret
     38 }
     39 
     40 declare i8* @foo(i32)
     41 declare i32 @bar(i8*)
     42