Matt Arsenault cb5dc3765b TableGen/GlobalISel: Fix constraining REG_SEQUENCE operands ...

This was hitting the default instruction constraint code which uses
the register classes in the instruction def, which REG_SEQUENCE does
not have.

Fixes not constraining the register class for AMDGPU fneg/fabs
patterns, which would fail when the use was another generic,
unconstrained instruction.

Another oddity I noticed is that the temporary registers are created
with an unnecessary, but incorrect 16-bit LLT but this shouldn't
matter.

I'm also still unclear why root and sub-instructions have to be
handled differently.

2020-04-14 22:05:22 -04:00

214 KiB

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