4 Commits

Author	SHA1	Message	Date
Jay Foad	7b3bbd83c0	Revert "[CodeGen] Really renumber slot indexes before register allocation (#67038)" ... This reverts commit 2501ae58e3bb9a70d279a56d7b3a0ed70a8a852c. Reverted due to various buildbot failures.	2023-10-09 12:31:32 +01:00
Jay Foad	2501ae58e3	[CodeGen] Really renumber slot indexes before register allocation (#67038) ... PR #66334 tried to renumber slot indexes before register allocation, but the numbering was still affected by list entries for instructions which had been erased. Fix this to make the register allocator's live range length heuristics even less dependent on the history of how instructions have been added to and removed from SlotIndexes's maps.	2023-10-09 11:44:41 +01:00
Noah Goldstein	de7881ebf5	[DAGCombiner] Combine (select c, (and X, 1), 0) -> (and (zext c), X) ... The middle end canonicalizes: `(and (zext c), X)` -> `(select c, (and X, 1), 0)` But the `and` + `zext` form gets better codegen.	2023-09-28 13:46:46 -05:00
Simon Pilgrim	723b6cf7a8	[DAG] visitFREEZE - handle case where the folded node merges with another existing node ... Fixes #60413	2023-02-04 20:53:47 +00:00