2 files changed, 13 insertions, 3 deletions
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
index 3fbf7c2fe6..b055696b90 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
@@ -6052,6 +6052,10 @@ void SelectionDAGBuilder::visitInlineAsm(ImmutableCallSite CS) {
     // Compute the constraint code and ConstraintType to use.
     TLI.ComputeConstraintToUse(OpInfo, OpInfo.CallOperand, &DAG);
 
+    if (OpInfo.ConstraintType == TargetLowering::C_Memory &&
+        OpInfo.Type == InlineAsm::isClobber)
+      continue;
+
     // If this is a memory input, and if the operand is not indirect, do what we
     // need to to provide an address for the memory input.
     if (OpInfo.ConstraintType == TargetLowering::C_Memory &&
@@ -6155,6 +6159,8 @@ void SelectionDAGBuilder::visitInlineAsm(ImmutableCallSite CS) {
         ExtraInfo |= InlineAsm::Extra_MayLoad;
       else if (OpInfo.Type == InlineAsm::isOutput)
         ExtraInfo |= InlineAsm::Extra_MayStore;
+      else if (OpInfo.Type == InlineAsm::isClobber)
+        ExtraInfo |= (InlineAsm::Extra_MayLoad | InlineAsm::Extra_MayStore);
     }
   }
 
diff --git a/lib/CodeGen/SelectionDAG/TargetLowering.cpp b/lib/CodeGen/SelectionDAG/TargetLowering.cpp
index 49f55e2fc6..f6b887d6e9 100644
--- a/lib/CodeGen/SelectionDAG/TargetLowering.cpp
+++ b/lib/CodeGen/SelectionDAG/TargetLowering.cpp
@@ -2707,7 +2707,9 @@ PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI) const {
 
 TargetLowering::ConstraintType
 TargetLowering::getConstraintType(const std::string &Constraint) const {
-  if (Constraint.size() == 1) {
+  unsigned S = Constraint.size();
+
+  if (S == 1) {
     switch (Constraint[0]) {
     default: break;
     case 'r': return C_RegisterClass;
@@ -2736,9 +2738,11 @@ TargetLowering::getConstraintType(const std::string &Constraint) const {
     }
   }
 
-  if (Constraint.size() > 1 && Constraint[0] == '{' &&
-      Constraint[Constraint.size()-1] == '}')
+  if (S > 1 && Constraint[0] == '{' && Constraint[S-1] == '}') {
+    if (S == 8 && !Constraint.compare(1, 6, "memory", 6))  // "{memory}"
+      return C_Memory;
     return C_Register;
+  }
   return C_Unknown;
 }