diff --git a/llvm/lib/Target/AMDGPU/AMDGPUTargetTransformInfo.h b/llvm/lib/Target/AMDGPU/AMDGPUTargetTransformInfo.h
--- a/llvm/lib/Target/AMDGPU/AMDGPUTargetTransformInfo.h
+++ b/llvm/lib/Target/AMDGPU/AMDGPUTargetTransformInfo.h
@@ -101,7 +101,6 @@
   explicit GCNTTIImpl(const AMDGPUTargetMachine *TM, const Function &F);
 
   bool hasBranchDivergence() { return true; }
-  bool useGPUDivergenceAnalysis() const;
 
   void getUnrollingPreferences(Loop *L, ScalarEvolution &SE,
                                TTI::UnrollingPreferences &UP,
diff --git a/llvm/lib/Target/AMDGPU/AMDGPUTargetTransformInfo.cpp b/llvm/lib/Target/AMDGPU/AMDGPUTargetTransformInfo.cpp
--- a/llvm/lib/Target/AMDGPU/AMDGPUTargetTransformInfo.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPUTargetTransformInfo.cpp
@@ -52,11 +52,6 @@
   cl::desc("Allow runtime unroll for AMDGPU if local memory used in a loop"),
   cl::init(true), cl::Hidden);
 
-static cl::opt<bool> UseLegacyDA(
-  "amdgpu-use-legacy-divergence-analysis",
-  cl::desc("Enable legacy divergence analysis for AMDGPU"),
-  cl::init(false), cl::Hidden);
-
 static cl::opt<unsigned> UnrollMaxBlockToAnalyze(
     "amdgpu-unroll-max-block-to-analyze",
     cl::desc("Inner loop block size threshold to analyze in unroll for AMDGPU"),
@@ -860,11 +855,6 @@
   return false;
 }
 
-/// \returns true if the new GPU divergence analysis is enabled.
-bool GCNTTIImpl::useGPUDivergenceAnalysis() const {
-  return !UseLegacyDA;
-}
-
 bool GCNTTIImpl::isReadRegisterSourceOfDivergence(
     const IntrinsicInst *ReadReg) const {
   Metadata *MD =
diff --git a/llvm/test/Analysis/LegacyDivergenceAnalysis/AMDGPU/atomics.ll b/llvm/test/Analysis/LegacyDivergenceAnalysis/AMDGPU/atomics.ll
--- a/llvm/test/Analysis/LegacyDivergenceAnalysis/AMDGPU/atomics.ll
+++ b/llvm/test/Analysis/LegacyDivergenceAnalysis/AMDGPU/atomics.ll
@@ -1,4 +1,4 @@
-; RUN: opt -mtriple=amdgcn-- -amdgpu-use-legacy-divergence-analysis -passes='print<divergence>' 2>&1 -disable-output %s | FileCheck %s
+; RUN: opt -mtriple=amdgcn-- -passes='print<divergence>' 2>&1 -disable-output %s | FileCheck %s
 
 ; CHECK: DIVERGENT: %orig = atomicrmw xchg ptr %ptr, i32 %val seq_cst
 define amdgpu_kernel void @test1(ptr %ptr, i32 %val) #0 {
diff --git a/llvm/test/Analysis/LegacyDivergenceAnalysis/AMDGPU/intrinsics.ll b/llvm/test/Analysis/LegacyDivergenceAnalysis/AMDGPU/intrinsics.ll
--- a/llvm/test/Analysis/LegacyDivergenceAnalysis/AMDGPU/intrinsics.ll
+++ b/llvm/test/Analysis/LegacyDivergenceAnalysis/AMDGPU/intrinsics.ll
@@ -1,4 +1,4 @@
-; RUN: opt -mtriple=amdgcn-- -passes='print<divergence>' 2>&1 -disable-output -amdgpu-use-legacy-divergence-analysis %s | FileCheck %s
+; RUN: opt -mtriple=amdgcn-- -passes='print<divergence>' 2>&1 -disable-output %s | FileCheck %s
 
 ; CHECK: DIVERGENT: %swizzle = call i32 @llvm.amdgcn.ds.swizzle(i32 %src, i32 100) #0
 define amdgpu_kernel void @ds_swizzle(ptr addrspace(1) %out, i32 %src) #0 {
diff --git a/llvm/test/Analysis/LegacyDivergenceAnalysis/AMDGPU/kernel-args.ll b/llvm/test/Analysis/LegacyDivergenceAnalysis/AMDGPU/kernel-args.ll
--- a/llvm/test/Analysis/LegacyDivergenceAnalysis/AMDGPU/kernel-args.ll
+++ b/llvm/test/Analysis/LegacyDivergenceAnalysis/AMDGPU/kernel-args.ll
@@ -1,4 +1,4 @@
-; RUN: opt %s -mtriple amdgcn-- -amdgpu-use-legacy-divergence-analysis -passes='print<divergence>' 2>&1 -disable-output | FileCheck %s
+; RUN: opt %s -mtriple amdgcn-- -passes='print<divergence>' 2>&1 -disable-output | FileCheck %s
 
 ; CHECK-LABEL: function 'test_amdgpu_ps':
 ; CHECK: DIVERGENT:  ptr addrspace(4) %arg0
diff --git a/llvm/test/Analysis/LegacyDivergenceAnalysis/AMDGPU/llvm.amdgcn.buffer.atomic.ll b/llvm/test/Analysis/LegacyDivergenceAnalysis/AMDGPU/llvm.amdgcn.buffer.atomic.ll
--- a/llvm/test/Analysis/LegacyDivergenceAnalysis/AMDGPU/llvm.amdgcn.buffer.atomic.ll
+++ b/llvm/test/Analysis/LegacyDivergenceAnalysis/AMDGPU/llvm.amdgcn.buffer.atomic.ll
@@ -1,4 +1,4 @@
-;RUN: opt -mtriple=amdgcn-mesa-mesa3d -amdgpu-use-legacy-divergence-analysis -passes='print<divergence>' 2>&1 -disable-output %s | FileCheck %s
+;RUN: opt -mtriple=amdgcn-mesa-mesa3d -passes='print<divergence>' 2>&1 -disable-output %s | FileCheck %s
 
 ;CHECK: DIVERGENT: %orig = call i32 @llvm.amdgcn.buffer.atomic.swap.i32(
 define float @buffer_atomic_swap(<4 x i32> inreg %rsrc, i32 inreg %data) #0 {
diff --git a/llvm/test/Analysis/LegacyDivergenceAnalysis/AMDGPU/llvm.amdgcn.image.atomic.ll b/llvm/test/Analysis/LegacyDivergenceAnalysis/AMDGPU/llvm.amdgcn.image.atomic.ll
--- a/llvm/test/Analysis/LegacyDivergenceAnalysis/AMDGPU/llvm.amdgcn.image.atomic.ll
+++ b/llvm/test/Analysis/LegacyDivergenceAnalysis/AMDGPU/llvm.amdgcn.image.atomic.ll
@@ -1,4 +1,4 @@
-;RUN: opt -mtriple=amdgcn-mesa-mesa3d -amdgpu-use-legacy-divergence-analysis -passes='print<divergence>' 2>&1 -disable-output %s | FileCheck %s
+;RUN: opt -mtriple=amdgcn-mesa-mesa3d -passes='print<divergence>' 2>&1 -disable-output %s | FileCheck %s
 
 ;CHECK: DIVERGENT: %orig = call i32 @llvm.amdgcn.image.atomic.swap.1d.i32.i32(
 define float @image_atomic_swap(<8 x i32> inreg %rsrc, i32 inreg %addr, i32 inreg %data) #0 {
diff --git a/llvm/test/Analysis/LegacyDivergenceAnalysis/AMDGPU/loads.ll b/llvm/test/Analysis/LegacyDivergenceAnalysis/AMDGPU/loads.ll
--- a/llvm/test/Analysis/LegacyDivergenceAnalysis/AMDGPU/loads.ll
+++ b/llvm/test/Analysis/LegacyDivergenceAnalysis/AMDGPU/loads.ll
@@ -1,4 +1,4 @@
-; RUN: opt -mtriple=amdgcn-- -amdgpu-use-legacy-divergence-analysis -passes='print<divergence>' 2>&1 -disable-output %s | FileCheck %s
+; RUN: opt -mtriple=amdgcn-- -passes='print<divergence>' 2>&1 -disable-output %s | FileCheck %s
 
 ; Test that we consider loads from flat and private addrspaces to be divergent.
 
diff --git a/llvm/test/Analysis/LegacyDivergenceAnalysis/AMDGPU/no-return-blocks.ll b/llvm/test/Analysis/LegacyDivergenceAnalysis/AMDGPU/no-return-blocks.ll
--- a/llvm/test/Analysis/LegacyDivergenceAnalysis/AMDGPU/no-return-blocks.ll
+++ b/llvm/test/Analysis/LegacyDivergenceAnalysis/AMDGPU/no-return-blocks.ll
@@ -1,4 +1,4 @@
-; RUN: opt %s -mtriple amdgcn-- -amdgpu-use-legacy-divergence-analysis -passes='print<divergence>' 2>&1 -disable-output | FileCheck %s
+; RUN: opt %s -mtriple amdgcn-- -passes='print<divergence>' 2>&1 -disable-output | FileCheck %s
 
 ; CHECK: DIVERGENT:  %tmp5 = getelementptr inbounds float, ptr addrspace(1) %arg, i64 %tmp2
 ; CHECK: DIVERGENT:  %tmp10 = load volatile float, ptr addrspace(1) %tmp5, align 4
diff --git a/llvm/test/Analysis/LegacyDivergenceAnalysis/AMDGPU/phi-undef.ll b/llvm/test/Analysis/LegacyDivergenceAnalysis/AMDGPU/phi-undef.ll
--- a/llvm/test/Analysis/LegacyDivergenceAnalysis/AMDGPU/phi-undef.ll
+++ b/llvm/test/Analysis/LegacyDivergenceAnalysis/AMDGPU/phi-undef.ll
@@ -1,4 +1,4 @@
-; RUN: opt -mtriple=amdgcn-- -amdgpu-use-legacy-divergence-analysis -passes='print<divergence>' 2>&1 -disable-output %s | FileCheck %s
+; RUN: opt -mtriple=amdgcn-- -passes='print<divergence>' 2>&1 -disable-output %s | FileCheck %s
 
 ; CHECK-LABEL: 'test1':
 ; CHECK-NEXT: DIVERGENT: i32 %bound
diff --git a/llvm/test/Analysis/LegacyDivergenceAnalysis/AMDGPU/unreachable-loop-block.ll b/llvm/test/Analysis/LegacyDivergenceAnalysis/AMDGPU/unreachable-loop-block.ll
--- a/llvm/test/Analysis/LegacyDivergenceAnalysis/AMDGPU/unreachable-loop-block.ll
+++ b/llvm/test/Analysis/LegacyDivergenceAnalysis/AMDGPU/unreachable-loop-block.ll
@@ -1,4 +1,4 @@
-; RUN: opt %s -mtriple amdgcn-- -amdgpu-use-legacy-divergence-analysis -passes='print<divergence>' 2>&1 -disable-output | FileCheck %s
+; RUN: opt %s -mtriple amdgcn-- -passes='print<divergence>' 2>&1 -disable-output | FileCheck %s
 
 ; CHECK: DIVERGENT:  %tmp = cmpxchg volatile
 define amdgpu_kernel void @unreachable_loop(i32 %tidx) #0 {
diff --git a/llvm/test/Analysis/LegacyDivergenceAnalysis/AMDGPU/workitem-intrinsics.ll b/llvm/test/Analysis/LegacyDivergenceAnalysis/AMDGPU/workitem-intrinsics.ll
--- a/llvm/test/Analysis/LegacyDivergenceAnalysis/AMDGPU/workitem-intrinsics.ll
+++ b/llvm/test/Analysis/LegacyDivergenceAnalysis/AMDGPU/workitem-intrinsics.ll
@@ -1,4 +1,4 @@
-; RUN: opt  -mtriple amdgcn-unknown-amdhsa -amdgpu-use-legacy-divergence-analysis -passes='print<divergence>' 2>&1 -disable-output %s | FileCheck %s
+; RUN: opt  -mtriple amdgcn-unknown-amdhsa -passes='print<divergence>' 2>&1 -disable-output %s | FileCheck %s
 
 declare i32 @llvm.amdgcn.workitem.id.x() #0
 declare i32 @llvm.amdgcn.workitem.id.y() #0