[llvm] r289447 - AMDGPU: llvm.amdgcn.interp.mov is a source of divergence

[Nicolai Haehnle via llvm-commits]

Author: nha
Date: Mon Dec 12 10:52:19 2016
New Revision: 289447

URL: http://llvm.org/viewvc/llvm-project?rev=289447&view=rev
Log:
AMDGPU: llvm.amdgcn.interp.mov is a source of divergence

Summary:
While the result is constant across a single primitive, each pixel
shader wave can have pixels from multiple primitives.

Reviewers: tstellarAMD, arsenm

Subscribers: kzhuravl, wdng, yaxunl, llvm-commits, tony-tye

Differential Revision: https://reviews.llvm.org/D27572

Modified:
    llvm/trunk/lib/Target/AMDGPU/AMDGPUTargetTransformInfo.cpp

Modified: llvm/trunk/lib/Target/AMDGPU/AMDGPUTargetTransformInfo.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/AMDGPU/AMDGPUTargetTransformInfo.cpp?rev=289447&r1=289446&r2=289447&view=diff
==============================================================================
--- llvm/trunk/lib/Target/AMDGPU/AMDGPUTargetTransformInfo.cpp (original)
+++ llvm/trunk/lib/Target/AMDGPU/AMDGPUTargetTransformInfo.cpp Mon Dec 12 10:52:19 2016
@@ -241,6 +241,7 @@ static bool isIntrinsicSourceOfDivergenc
   case Intrinsic::amdgcn_workitem_id_x:
   case Intrinsic::amdgcn_workitem_id_y:
   case Intrinsic::amdgcn_workitem_id_z:
+  case Intrinsic::amdgcn_interp_mov:
   case Intrinsic::amdgcn_interp_p1:
   case Intrinsic::amdgcn_interp_p2:
   case Intrinsic::amdgcn_mbcnt_hi: