[llvm-commits] [llvm] r122727 - in /llvm/trunk: lib/Transforms/Scalar/EarlyCSE.cpp test/Transforms/EarlyCSE/basic.ll

[Duncan Sands]

Hi Chris,

> +unsigned DenseMapInfo<MemoryValue>::getHashValue(MemoryValue Val) {
> +  Instruction *Inst = Val.Inst;
> +  // Hash in all of the operands as pointers.
> +  unsigned Res = 0;
> +  for (unsigned i = 0, e = Inst->getNumOperands(); i != e; ++i)
> +    Res ^= getHash(Inst->getOperand(i))<<  i;
> +  // Mix in the opcode.
> +  return (Res<<  1) ^ Inst->getOpcode();
> +}

for calls you could also hash in the attributes.

Ciao, Duncan.