[PATCH] D12246: [NVPTX] change threading intrinsics from noduplicate to convergent

[Jingyue Wu via llvm-commits]

jingyue accepted this revision.
This revision is now accepted and ready to land.

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Comment at: test/CodeGen/NVPTX/convergent-syncthreads.ll:3
@@ +2,3 @@
+
+; Make sure the call to syncthreads is not duplicate here by the LLVM
+; optimizations, because it has the convergent attribute set.
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I understand that you are checking against JumpThreading duplicating syncthreads, but the wording is inaccurate. 

The convergent attribute restricts the compiler so that it moves a convergent instruction only to a control-equivalent location. It does _not_ prevent LLVM from duplicating convergent instructions. 


http://reviews.llvm.org/D12246