wangpc 41454ab256 [RISCV] Use constant pool for large integers ...

For large integers (for example, magic numbers generated by
TargetLowering::BuildSDIV when dividing by constant), we may
need about 4~8 instructions to build them.
In the same time, it just takes two instructions to load
constants (with extra cycles to access memory), so it may be
profitable to put these integers into constant pool.

Reviewed By: asb, craig.topper

Differential Revision: https://reviews.llvm.org/D114950

2021-12-31 14:48:48 +08:00

7.4 KiB

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