[PATCH] D156412: [AMDGPU][PEI] Callee saves for amdgpu_cs_chain[_preserve]

[Matt Arsenault via Phabricator via llvm-commits]

arsenm added inline comments.


================
Comment at: llvm/lib/Target/AMDGPU/SIMachineFunctionInfo.cpp:310
+  // the usual scratch registers).
+  if (isChainFunction() && VGPR >= AMDGPU::VGPR0 && VGPR < AMDGPU::VGPR8)
+    return;
----------------
arsenm wrote:
> Can you put this special register property as some kind of helper in SIRegisterInfo?
Alternatively add the inverse of CSR_AMDGPU_CS_ChainPreserve and test that?


Repository:
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  https://reviews.llvm.org/D156412/new/

https://reviews.llvm.org/D156412