1 files changed, 6 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/MachineCSE.cpp b/llvm/lib/CodeGen/MachineCSE.cpp
index aad376c4702..c602b51f2a6 100644
--- a/llvm/lib/CodeGen/MachineCSE.cpp
+++ b/llvm/lib/CodeGen/MachineCSE.cpp
@@ -352,6 +352,12 @@ bool MachineCSE::isCSECandidate(MachineInstr *MI) {
       // This is a trivial form of alias analysis.
       return false;
   }
+
+  // Ignore stack guard loads, otherwise the register that holds CSEed value may
+  // be spilled and get loaded back with corrupted data.
+  if (MI->getOpcode() == TargetOpcode::LOAD_STACK_GUARD)
+    return false;
+
   return true;
 }