Subzero ARM: lowerArguments (GPR), basic legalize(), and lowerRet(i32, i64).

src/IceUtils.h

 //===- subzero/src/IceUtils.h - Utility functions ---------------*- C++ -*-===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 // This file declares some utility functions.
@@ skipping 60 matching lines @@
     return (X & (N - 1)) == 0;
   }
 
   static inline uint64_t OffsetToAlignment(uint64_t Pos, uint64_t Align) {
     assert(llvm::isPowerOf2_64(Align));
     uint64_t Mod = Pos & (Align - 1);
     if (Mod == 0)
       return 0;
     return Align - Mod;
   }
+
+  // Precondition: 0 <= shift < 32
+  static inline uint32_t rotateLeft32(uint32_t value, uint32_t shift) {
+    if (shift == 0)
+      return value;
+    return (value << shift) | (value >> (32 - shift));
+  }
+
+  static inline uint32_t rotateRight32(uint32_t value, uint32_t shift) {
+    if (shift == 0)
+      return value;
+    return (value >> shift) | (value << (32 - shift));
+  }
 };
 
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICEUTILS_H