The problematic case for unsigned comparisons occurs only when the
second argument is zero.
The problematic case for signed comparisons occurs only when the second
argument is the signed minimum value.
We can use KnownBits to know when we don't have to worry about this.
Source: https://devblogs.microsoft.com/oldnewthing/20210607-00/?p=105288
Refresh of the generic scheduling model to use A510 instead of A55.
Main benefits are to the little core, and introducing SVE scheduling information.
Changes tested on various OoO cores, no performance degradation is seen.
Differential Revision: https://reviews.llvm.org/D156799
This adds some more scalar instructions that are both associative and
commutative to isAssociativeAndCommutative, allowing the machine
combiner to reassociate them to reduce critical path length.
Differential Revision: https://reviews.llvm.org/D134260
This adds some more scalar instructions that are both associative and
commutative to isAssociativeAndCommutative, allowing the machine
combiner to reassociate them to reduce critical path length.
Differential Revision: https://reviews.llvm.org/D134260
