Changes to support making the shift instructions be true BinaryOperators.

This feature is needed in order to support shifts of more than 255 bits
on large integer types.  This changes the syntax for llvm assembly to
make shl, ashr and lshr instructions look like a binary operator:
   shl i32 %X, 1
instead of
   shl i32 %X, i8 1
Additionally, this should help a few passes perform additional optimizations.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33776 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 21 insertions, 0 deletions

diff --git a/include/llvm/Instruction.h b/include/llvm/Instruction.h
index 3e9f749..15c5919 100644
--- a/include/llvm/Instruction.h
+++ b/include/llvm/Instruction.h
@@ -129,6 +129,27 @@ public:
     return getOpcode() >= BinaryOpsBegin && getOpcode() < BinaryOpsEnd;
   }
 
+  /// @brief Determine if the Opcode is one of the shift instructions.
+  static inline bool isShift(unsigned Opcode) {
+    return Opcode >= Shl && Opcode <= AShr;
+  }
+
+  /// @brief Determine if the instruction's opcode is one of the shift 
+  /// instructions.
+  inline bool isShift() { return isShift(getOpcode()); }
+
+  /// isLogicalShift - Return true if this is a logical shift left or a logical
+  /// shift right.
+  inline bool isLogicalShift() {
+    return getOpcode() == Shl || getOpcode() == LShr;
+  }
+
+  /// isLogicalShift - Return true if this is a logical shift left or a logical
+  /// shift right.
+  inline bool isArithmeticShift() {
+    return getOpcode() == AShr;
+  }
+
   /// @brief Determine if the OpCode is one of the CastInst instructions.
   static inline bool isCast(unsigned OpCode) {
     return OpCode >= CastOpsBegin && OpCode < CastOpsEnd;