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clang-p2996/llvm/test/CodeGen/AMDGPU/GlobalISel
Valery Pykhtin 342acfc9bb [AMDGPU] Turn off pass to rewrite partially used virtual superregisters after RenameIndependentSubregs pass with registers of minimal size.
There is a failure with this pass in the case when target register class for a subregister isn't known from instruction description (for ex. COPY).
Currently in this situation the RC is obtained using TargetRegisterInfo::getSubRegisterClass but in general it's not working.

In order to fix this two things should be done:
1. Stop processing a subregister if the target register class is unknown (conservative approach)
2. Improve deduction of subregister' target register class (i.e by processing COPY chain)

I was going to implement point 1 but my tests use implicit operands for S_NOP and they don't have associated target register class and all tests fail.
Therefore I decided to turn off the pass now, implement point 1 and fix my tests.

Reviewed By: arsenm, #amdgpu

Differential Revision: https://reviews.llvm.org/D152291
2023-06-07 12:05:25 +02:00
..
2023-02-22 16:39:06 +01:00
2023-05-26 15:15:39 -07:00
2023-02-22 16:39:06 +01:00
2023-05-26 15:15:39 -07:00