[exceptions] Upgrade exception handlers when stack protector is used

Summary:
MSVC provide exception handlers with enhanced information to deal with security buffer feature (/GS).

To be more secure, the security cookies (GS and SEH) are validated when unwinding the stack.

The following code:
```
void f() {}

void foo() {
  __try {
    f();
  } __except(1) {
    f();
  }
}
```

Reviewers: majnemer, rnk

Subscribers: thakis, llvm-commits, chrisha

Differential Revision: http://reviews.llvm.org/D21101

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@274239 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 16 insertions, 0 deletions

diff --git a/test/CodeGen/WinEH/wineh-promote-eh.ll b/test/CodeGen/WinEH/wineh-promote-eh.ll
new file mode 100644
index 00000000000..7bda4d7bd4d
--- /dev/null
+++ b/test/CodeGen/WinEH/wineh-promote-eh.ll
@@ -0,0 +1,16 @@
+; RUN: opt -mtriple=i686-windows-msvc -S -winehprepare %s | FileCheck %s
+
+declare i32 @_except_handler3(...)
+
+define void @test1a() personality i32 (...)* @_except_handler3 {
+; CHECK: define void @test1a() personality i32 (...)* @_except_handler3
+entry:
+  ret void
+}
+
+define void @test1b() ssp personality i32 (...)* @_except_handler3 {
+; CHECK: define void @test1b() [[attr:.*]] personality i32 (...)* @_except_handler4
+entry:
+  ret void
+}
+