Move MachineInstrExpressionTrait::getHashValue() out of line so it can skip over only virtual register defs. This matches what isEqual() is doing.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97680 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 1 insertions, 42 deletions

diff --git a/include/llvm/CodeGen/MachineInstr.h b/include/llvm/CodeGen/MachineInstr.h
index 85ad26e..d84f882 100644
--- a/include/llvm/CodeGen/MachineInstr.h
+++ b/include/llvm/CodeGen/MachineInstr.h
@@ -432,48 +432,7 @@ struct MachineInstrExpressionTrait : DenseMapInfo<MachineInstr*> {
     return reinterpret_cast<MachineInstr*>(-1);
   }
 
-  static unsigned getHashValue(const MachineInstr* const &MI) {
-    unsigned Hash = MI->getOpcode() * 37;
-    for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
-      const MachineOperand &MO = MI->getOperand(i);
-      uint64_t Key = (uint64_t)MO.getType() << 32;
-      switch (MO.getType()) {
-        default: break;
-        case MachineOperand::MO_Register:
-          if (MO.isDef())
-            continue;  // Skip defs.
-          Key |= MO.getReg();
-          break;
-        case MachineOperand::MO_Immediate:
-          Key |= MO.getImm();
-          break;
-        case MachineOperand::MO_FrameIndex:
-        case MachineOperand::MO_ConstantPoolIndex:
-        case MachineOperand::MO_JumpTableIndex:
-          Key |= MO.getIndex();
-          break;
-        case MachineOperand::MO_MachineBasicBlock:
-          Key |= DenseMapInfo<void*>::getHashValue(MO.getMBB());
-          break;
-        case MachineOperand::MO_GlobalAddress:
-          Key |= DenseMapInfo<void*>::getHashValue(MO.getGlobal());
-          break;
-        case MachineOperand::MO_BlockAddress:
-          Key |= DenseMapInfo<void*>::getHashValue(MO.getBlockAddress());
-          break;
-      }
-      Key += ~(Key << 32);
-      Key ^= (Key >> 22);
-      Key += ~(Key << 13);
-      Key ^= (Key >> 8);
-      Key += (Key << 3);
-      Key ^= (Key >> 15);
-      Key += ~(Key << 27);
-      Key ^= (Key >> 31);
-      Hash = (unsigned)Key + Hash * 37;
-    }
-    return Hash;
-  }
+  static unsigned getHashValue(const MachineInstr* const &MI);
 
   static bool isEqual(const MachineInstr* const &LHS,
                       const MachineInstr* const &RHS) {