| Issue |
176453
|
| Summary |
[SDAG][Backend] Extend the default `TLI.isTruncFree(SDValue, EVT)`
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
DaKnig
|
There are a few similar cases here that would surely be free across targets: for example, `isTruncFree(sext/zext x)` should return true (`x` already exists and thus is free), similarly for constants.
This should be simple enough for a beginner to add. Just search for `TargetLoweringInfo::isTruncFree`.
This would allow deduplication of code like [this](https://github.com/llvm/llvm-project/pull/176366) better across different opcodes.
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