Sebastian Neubauer fd1cfc9094 [AMDGPU][GlobalISel] Fix waterfall loops ...

- Move the `s_and exec` to its correct position before the content of
  the waterfall loop
- Use the SI_WATERFALL pseudo instruction, like for sdag, to benefit
  from optimizations
- Add support for indirect function calls

To support indirect calls, add a G_SI_CALL instruction without register
class restrictions and insert a waterfall loop when applying register
banks.

Differential Revision: https://reviews.llvm.org/D109052

2021-10-28 10:30:55 +02:00

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