From 12f3ca4cdb95b193af905a00e722a4dcb40b3de3 Mon Sep 17 00:00:00 2001
From: Dimitry Andric <dim@FreeBSD.org>
Date: Wed, 26 Apr 2017 19:45:00 +0000
Subject: Vendor import of llvm trunk r301441:
 https://llvm.org/svn/llvm-project/llvm/trunk@301441

---
 test/CodeGen/X86/empty-function.ll | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)
 create mode 100644 test/CodeGen/X86/empty-function.ll

(limited to 'test/CodeGen/X86/empty-function.ll')

diff --git a/test/CodeGen/X86/empty-function.ll b/test/CodeGen/X86/empty-function.ll
new file mode 100644
index 0000000000000..92bebd0ab1a7c
--- /dev/null
+++ b/test/CodeGen/X86/empty-function.ll
@@ -0,0 +1,22 @@
+; RUN: llc < %s -mtriple=i686-pc-win32   | FileCheck -check-prefix=CHECK -check-prefix=WIN32 %s
+; RUN: llc < %s -mtriple=x86_64-pc-win32 | FileCheck -check-prefix=CHECK -check-prefix=WIN64 %s
+; RUN: llc < %s -mtriple=i386-linux-gnu  | FileCheck -check-prefix=LINUX %s
+
+target datalayout = "e-m:x-p:32:32-i64:64-f80:32-n8:16:32-a:0:32-S32"
+target triple = "i686-pc-windows-msvc18.0.0"
+
+; Don't emit empty functions on Windows; it can lead to duplicate entries
+; (multiple functions sharing the same RVA) in the Guard CF Function Table which
+; the kernel refuses to load.
+
+define void @f() {
+entry:
+  unreachable
+
+; CHECK-LABEL: f:
+; WIN32: nop
+; WIN64: ud2
+; LINUX-NOT: nop
+; LINUX-NOT: ud2
+
+}
-- 
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