[PATCH] D26585: [AMDGPU] Add wave barrier builtin

[Matt Arsenault via llvm-commits]

arsenm added a comment.

This also needs a corresponding convergent pseudoinstruction otherwise machine CFG changes could do the same things



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Comment at: include/llvm/IR/IntrinsicsAMDGPU.td:110
 
+def int_amdgcn_s_wave_barrier : GCCBuiltin<"__builtin_amdgcn_s_wave_barrier">,
+  Intrinsic<[], [], [IntrConvergent]>;
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There is no scalar instruction, so this should drop the _s_


Repository:
  rL LLVM

https://reviews.llvm.org/D26585