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[MBP] Prevent rotating a chain contains entry block

Authored by Carrot on Dec 14 2020, 12:48 PM.

Description

[MBP] Prevent rotating a chain contains entry block

The entry block should always be the first BB in a function.
So we should not rotate a chain contains the entry block.

Differential Revision: https://reviews.llvm.org/D92882

Details

Committed
CarrotDec 14 2020, 12:48 PM
Differential Revision
D92882: [MBP] Prevent rotating a chain contains entry block
Parents
rGf5fe8493e5ac: [LAA] Relax restrictions on early exits in loop structure
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