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AMDGPU: Fix not always reserving VGPRs used for SGPR spilling

Authored by arsenm on Oct 15 2020, 4:13 PM.



The VGPRs used for SGPR spills need to be reserved, even if we aren't
speculatively reserving one.

This was broken by 117e5609e98b43f925c678b72f816ad3a1c3eee7.

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arsenm created this revision.Oct 15 2020, 4:13 PM
Herald added a project: Restricted Project. · View Herald TranscriptOct 15 2020, 4:13 PM
arsenm requested review of this revision.Oct 15 2020, 4:13 PM

Any tests?

We apparently don't have any tests turning off the pre-reserved VGPR. With the getReservedRegs change, one test fails due to reserveVGPRforSGPRSpills returning NoRegister

rampitec accepted this revision.Oct 16 2020, 9:11 AM
This revision is now accepted and ready to land.Oct 16 2020, 9:11 AM