Override runOnMachineFunction for X86ISelDAGToDAG so that we can

reset the subtarget on each function.

llvm-svn: 209384

1 files changed, 7 insertions, 0 deletions

diff --git a/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp b/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp
index 03c9620db4a..74386d33990 100644
--- a/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp
+++ b/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp
@@ -162,6 +162,13 @@ namespace {
       return "X86 DAG->DAG Instruction Selection";
     }
 
+    bool runOnMachineFunction(MachineFunction &MF) override {
+      // Reset the subtarget each time through.
+      Subtarget = &TM.getSubtarget<X86Subtarget>();
+      SelectionDAGISel::runOnMachineFunction(MF);
+      return true;
+    }
+
     void EmitFunctionEntryCode() override;
 
     bool IsProfitableToFold(SDValue N, SDNode *U, SDNode *Root) const override;