commit 0f9c84cd936b6532495673613d9390efdc85cb3c
author Alexander Timofeev <Alexander.Timofeev@amd.com> Thu Jun 15 19:33:10 2017 +0000
committer Alexander Timofeev <Alexander.Timofeev@amd.com> Thu Jun 15 19:33:10 2017 +0000
tree f21751f18521ab02ca6f4075169926ff7399333a
parent f2d3e6d3d50ea7f16ffaf12bfbb03384d019d3b2

DivergencyAnalysis patch for review

llvm-svn: 305494

llvm/lib/Target/AMDGPU/AMDGPUTargetTransformInfo.cpp

diff --git a/llvm/lib/Target/AMDGPU/AMDGPUTargetTransformInfo.cpp b/llvm/lib/Target/AMDGPU/AMDGPUTargetTransformInfo.cpp
index 65dba7d..0d6689b 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUTargetTransformInfo.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPUTargetTransformInfo.cpp
@@ -489,6 +489,19 @@
   return false;
 }
 
+bool AMDGPUTTIImpl::isAlwaysUniform(const Value *V) const {
+  if (const IntrinsicInst *Intrinsic = dyn_cast<IntrinsicInst>(V)) {
+    switch (Intrinsic->getIntrinsicID()) {
+    default:
+      return false;
+    case Intrinsic::amdgcn_readfirstlane:
+    case Intrinsic::amdgcn_readlane:
+      return true;
+    }
+  }
+  return false;
+}
+
 unsigned AMDGPUTTIImpl::getShuffleCost(TTI::ShuffleKind Kind, Type *Tp, int Index,
                                        Type *SubTp) {
   if (ST->hasVOP3PInsts()) {