Update LLVM to 91430.

1 files changed, 39 insertions, 0 deletions

diff --git a/include/llvm/CodeGen/CalcSpillWeights.h b/include/llvm/CodeGen/CalcSpillWeights.h
new file mode 100644
index 0000000..2fc03bd
--- /dev/null
+++ b/include/llvm/CodeGen/CalcSpillWeights.h
@@ -0,0 +1,39 @@
+//===---------------- lib/CodeGen/CalcSpillWeights.h ------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+
+#ifndef LLVM_CODEGEN_CALCSPILLWEIGHTS_H
+#define LLVM_CODEGEN_CALCSPILLWEIGHTS_H
+
+#include "llvm/CodeGen/MachineFunctionPass.h"
+
+namespace llvm {
+
+  class LiveInterval;
+
+  /// CalculateSpillWeights - Compute spill weights for all virtual register
+  /// live intervals.
+  class CalculateSpillWeights : public MachineFunctionPass {
+  public:
+    static char ID;
+
+    CalculateSpillWeights() : MachineFunctionPass(&ID) {}
+
+    virtual void getAnalysisUsage(AnalysisUsage &au) const;
+
+    virtual bool runOnMachineFunction(MachineFunction &fn);    
+
+  private:
+    /// Returns true if the given live interval is zero length.
+    bool isZeroLengthInterval(LiveInterval *li) const;
+  };
+
+}
+
+#endif // LLVM_CODEGEN_CALCSPILLWEIGHTS_H