[PBQP] Add missing headers from r219421.
llvm-svn: 219425
diff --git a/llvm/lib/Target/AArch64/AArch64PBQPRegAlloc.h b/llvm/lib/Target/AArch64/AArch64PBQPRegAlloc.h
new file mode 100644
index 0000000..4bd780c
--- /dev/null
+++ b/llvm/lib/Target/AArch64/AArch64PBQPRegAlloc.h
@@ -0,0 +1,38 @@
+//===-- AArch64PBQPRegAlloc.h - AArch64 specific PBQP constraints -------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIB_TARGET_AARCH64_AARCH64PBQPREGALOC_H
+#define LLVM_LIB_TARGET_AARCH64_AARCH64PBQPREGALOC_H
+
+#include "llvm/ADT/SetVector.h"
+#include "llvm/CodeGen/PBQPRAConstraint.h"
+
+namespace llvm {
+
+class A57PBQPConstraints : public PBQPRAConstraint {
+public:
+
+ // Add A57 specific constraints to the PBQP graph.
+ void apply(PBQPRAGraph &G) override;
+
+private:
+ SmallSetVector<unsigned, 32> Chains;
+
+ // Add the accumulator chaining constraint, inside the chain, i.e. so that
+ // parity(Rd) == parity(Ra).
+ // \return true if a constraint was added
+ bool addIntraChainConstraint(PBQPRAGraph &G, unsigned Rd, unsigned Ra);
+
+ // Add constraints between existing chains
+ void addInterChainConstraint(PBQPRAGraph &G, unsigned Rd, unsigned Ra);
+};
+
+}
+
+#endif // LLVM_LIB_TARGET_AARCH64_AARCH64PBQPREGALOC_H