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Author	SHA1	Message	Date
weiguozhi	11e65b98b3	[JumpThreading] Remove deleted BB from Unreachable (#126984 ) Although an unreachable BB is skipped by processBlock, its successor can still be handled by processBlock, and maybeMergeBasicBlockIntoOnlyPred may merge the two BBs and delete the unreachable BB. Then the garbage pointer is left in Unreachable set. This patch avoids merging a BB into unreachable predecessor.	2025-02-27 15:40:21 -08:00
Nikita Popov	92dc4fff87	[ValueTracking] Check for known bits conflict for shl nsw (PR62908) I removed the conflict check from computeKnownBitsFromShiftOperator() in D150648 assuming that this is now handled on the KnownBits side. However, the nsw handling is still inside ValueTracking, so we still need to handle conflicts there. Restore the check closer to where it is relevant. Fixes https://github.com/llvm/llvm-project/issues/62908.	2023-05-24 10:54:10 +02:00

Author

SHA1

Message

Date

weiguozhi

11e65b98b3

[JumpThreading] Remove deleted BB from Unreachable (#126984 )

Although an unreachable BB is skipped by processBlock, its successor can
still be handled by processBlock, and maybeMergeBasicBlockIntoOnlyPred
may merge the two BBs and delete the unreachable BB. Then the garbage
pointer is left in Unreachable set. This patch avoids merging a BB into 
unreachable predecessor.

2025-02-27 15:40:21 -08:00

Nikita Popov

92dc4fff87

[ValueTracking] Check for known bits conflict for shl nsw (PR62908)

I removed the conflict check from computeKnownBitsFromShiftOperator()
in D150648 assuming that this is now handled on the KnownBits side.
However, the nsw handling is still inside ValueTracking, so we
still need to handle conflicts there. Restore the check closer to
where it is relevant.

Fixes https://github.com/llvm/llvm-project/issues/62908.

2023-05-24 10:54:10 +02:00

2 Commits