Imported Upstream version 6.10.0.49

Former-commit-id: 1d6753294b2993e1fbf92de9366bb9544db4189b

external/llvm-project/llvm/test/LTO/X86/keep-used-puts-during-instcombine.ll

@@ -0,0 +1,36 @@
+; RUN: opt -S -instcombine <%s | FileCheck %s
+; rdar://problem/16165191
+; llvm.compiler.used functions should not be renamed
+
+target triple = "x86_64-apple-darwin11"
+
+@llvm.compiler.used = appending global [1 x i8*] [
+  i8* bitcast (i32(i8*)* @puts to i8*)
+  ], section "llvm.metadata"
+@llvm.used = appending global [1 x i8*] [
+  i8* bitcast (i32(i32)* @uses_printf to i8*)
+  ], section "llvm.metadata"
+
+@str = private unnamed_addr constant [13 x i8] c"hello world\0A\00"
+
+define i32 @uses_printf(i32 %i) {
+entry:
+  %s = getelementptr [13 x i8], [13 x i8]* @str, i64 0, i64 0
+  call i32 (i8*, ...) @printf(i8* %s)
+  ret i32 0
+}
+
+define internal i32 @printf(i8* readonly nocapture %fmt, ...) {
+entry:
+  %ret = call i32 @bar(i8* %fmt)
+  ret i32 %ret
+}
+
+; CHECK: define {{.*}} @puts(
+define internal i32 @puts(i8* %s) {
+entry:
+  %ret = call i32 @bar(i8* %s)
+  ret i32 %ret
+}
+
+declare i32 @bar(i8*)