From d49711996f94cc73908d03d51938ffaaa40c3da9 Mon Sep 17 00:00:00 2001
From: Andrew Kaylor <andrew.kaylor@intel.com>
Date: Thu, 22 Jun 2017 23:27:16 +0000
Subject: Restrict the definition of loop preheader to avoid EH blocks

Differential Revision: https://reviews.llvm.org/D34487

llvm-svn: 306070
---
 llvm/lib/CodeGen/MachineBasicBlock.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'llvm/lib/CodeGen/MachineBasicBlock.cpp')

diff --git a/llvm/lib/CodeGen/MachineBasicBlock.cpp b/llvm/lib/CodeGen/MachineBasicBlock.cpp
index 590acc0..81597af 100644
--- a/llvm/lib/CodeGen/MachineBasicBlock.cpp
+++ b/llvm/lib/CodeGen/MachineBasicBlock.cpp
@@ -228,6 +228,12 @@ LLVM_DUMP_METHOD void MachineBasicBlock::dump() const {
 }
 #endif
 
+bool MachineBasicBlock::isLegalToHoistInto() const {
+  if (isReturnBlock() || hasEHPadSuccessor())
+    return false;
+  return true;
+}
+
 StringRef MachineBasicBlock::getName() const {
   if (const BasicBlock *LBB = getBasicBlock())
     return LBB->getName();
-- 
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