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[AMDGPU] Extend the SI Load/Store optimizer to combine more things.

Description

[AMDGPU] Extend the SI Load/Store optimizer to combine more things.

I've extended the load/store optimizer to be able to produce dwordx3
loads and stores, This change allows many more load/stores to be combined,
and results in much more optimal code for our hardware.

Differential Revision: https://reviews.llvm.org/D54042

Details

Committed
sheredomDec 12 2018, 8:15 AM
Differential Revision
D54042: [AMDGPU] Extend the SI Load/Store optimizer to combine more things.
Parents
rL348936: ELF: Clean up section type computation
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