llvm/llvm-project

[NVPTX] Implement `TLI.isTruncateFree(EVT, EVT)` and `TLI.isZExtFree()`

Chiusa

#114.339 aperta il 31 ott 2024

 (11 commenti) (0 reazioni) (2 assegnatari)C++ (10.782 fork)batch import
backend:NVPTXgood first issue

Metriche repository

Star
 (26.378 stelle)
Metriche merge PR
 (Metriche PR in attesa)

Descrizione

NVPTX currently does not override TLI.isTruncateFree(EVT, EVT) and TLI.isZExtFree(), and it probably should.

zext/truncate between i32/i64 can probably be considered free, as the values already live in separate 32-bit registers in hardware.

Originally posted by @Artem-B in https://github.com/llvm/llvm-project/pull/98666#discussion_r1681805956

Guida contributor