vendor/llvm/llvm-release_50-r319231

1 files changed, 8 insertions, 0 deletions

diff --git a/include/llvm/CodeGen/MachineRegisterInfo.h b/include/llvm/CodeGen/MachineRegisterInfo.h
index 8347f00cbc7a..5ef0ac90e3c2 100644
--- a/include/llvm/CodeGen/MachineRegisterInfo.h
+++ b/include/llvm/CodeGen/MachineRegisterInfo.h
@@ -807,6 +807,14 @@ public:
     return getReservedRegs().test(PhysReg);
   }
 
+  /// Returns true when the given register unit is considered reserved.
+  ///
+  /// Register units are considered reserved when for at least one of their
+  /// root registers, the root register and all super registers are reserved.
+  /// This currently iterates the register hierarchy and may be slower than
+  /// expected.
+  bool isReservedRegUnit(unsigned Unit) const;
+
   /// isAllocatable - Returns true when PhysReg belongs to an allocatable
   /// register class and it hasn't been reserved.
   ///