[LLVMdev] [llvmdev] Whole function SelectionDAG
gohman at apple.com
Fri Jun 11 09:28:53 PDT 2010
On Jun 8, 2010, at 8:33 PM, Zhongxing Xu <xuzhongxing at gmail.com> wrote:
> At first I'll try the simplest strategy: put the instruction in the
> machine BB corresponding to the LLVM BB where it comes from.
> To implement this, I plan to add an operand to non-passive node
> which points to the BasicBlockSDNode which the node belongs to.
This would inhibit cross-block CSE, which would be one of the main
benefits of whole-function processing. What problem are you trying to
> Another idea is to use a side map to map each node to its block. But
> I guess it's difficult to keep the map consistent when transforming
> the DAG.
More information about the llvm-dev