Sebastian Neubauer a022b1ccd8 [AMDGPU] Add amdgpu_gfx calling convention ...

Add a calling convention called amdgpu_gfx for real function calls
within graphics shaders. For the moment, this uses the same calling
convention as other calls in amdgpu, with registers excluded for return
address, stack pointer and stack buffer descriptor.

Differential Revision: https://reviews.llvm.org/D88540

2020-11-09 16:51:44 +01:00

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