| Issue |
176783
|
| Summary |
[DAG] Add DAGCombiner::visitCLMUL and basic folds
|
| Labels |
good first issue,
llvm:SelectionDAG
|
| Assignees |
|
| Reporter |
RKSimon
|
Add DAGCombiner::visitCLMUL (shared by ISD::CMUL/CMULH/CMULR nodes):
- [ ] Add constant fold handling
- [ ] Canonicalize constants to the RHS
- [ ] If RHS operand is zero, then return to zero.
Checkout out other DAGCombiner::visit* methods to get an idea of the typical style.
Noticed while wrangling CLMUL expansion to make better use of PCLMULQDQ on x86.
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