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[AMDGPU] Allow register tuples to set asm names

Description

[AMDGPU] Allow register tuples to set asm names

This change reverts most of the previous register name generation.
The real problem is that RegisterTuple does not generate asm names.
Added optional operand to RegisterTuple. This way we can simplify
register name access and dramatically reduce the size of static
tables for the backend.

Differential Revision: https://reviews.llvm.org/D64967

Details

Committed
rampitecJul 19 2019, 11:05 AM
Differential Revision
D64967: [AMDGPU] Allow register tuples to set asm names
Parents
rL366597: AMDGPU/GlobalISel: Fix MMO flags for kernel argument loads
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