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[ARM] Optimize immediate selection

Authored by SjoerdMeijer on Jul 29 2020, 5:13 AM.

Description

[ARM] Optimize immediate selection

Optimize some specific immediates selection by materializing them with sub/mvn
instructions as opposed to loading them from the constant pool.

Patch by Ben Shi, powerman1st@163.com.

Differential Revision: https://reviews.llvm.org/D83745

Details

Committed
SjoerdMeijerJul 29 2020, 5:29 AM
Differential Revision
D83745: [ARM] Optimize immediate selection
Parents
rG200bb5191a35: AMDGPU/GlobalISel: Refactor special argument management
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