[llvm-commits] [llvm] r68082 - /llvm/trunk/lib/Target/X86/X86ISelDAGToDAG.cpp

[Chris Lattner]

On Mar 30, 2009, at 6:13 PM, Evan Cheng wrote:
> URL: http://llvm.org/viewvc/llvm-project?rev=68082&view=rev
> Log:
> X86 address mode isel tweak. If the base of the address is also used  
> by a CopyToReg (i.e. it's likely live-out), do not fold the sub- 
> expressions into the addressing mode to avoid computing the address  
> twice. The CopyToReg use will be isel'ed to a LEA, re-use it for  
> address instead.

Ok.

> +      for (SDNode::use_iterator UI = N.getNode()->use_begin(),
> +             UE = N.getNode()->use_end(); UI != UE; ++UI) {
> +        if (UI->getOpcode() == ISD::CopyToReg) {

How about turning this into a "isUsedByCopyToRegNode" predicate?

-Chris