diff --git a/llvm/include/llvm/Analysis/LoopAccessAnalysis.h b/llvm/include/llvm/Analysis/LoopAccessAnalysis.h
--- a/llvm/include/llvm/Analysis/LoopAccessAnalysis.h
+++ b/llvm/include/llvm/Analysis/LoopAccessAnalysis.h
@@ -605,6 +605,11 @@
   /// invariant.
   void collectStridedAccess(Value *LoadOrStoreInst);
 
+  // Emits the first unsafe memory dependence in a loop.
+  // Emits nothing if there are no unsafe dependences
+  // or if the dependences were not recorded.
+  void emitUnsafeDependenceRemark();
+
   std::unique_ptr<PredicatedScalarEvolution> PSE;
 
   /// We need to check that all of the pointers in this list are disjoint
diff --git a/llvm/lib/Analysis/LoopAccessAnalysis.cpp b/llvm/lib/Analysis/LoopAccessAnalysis.cpp
--- a/llvm/lib/Analysis/LoopAccessAnalysis.cpp
+++ b/llvm/lib/Analysis/LoopAccessAnalysis.cpp
@@ -45,6 +45,7 @@
 #include "llvm/IR/InstrTypes.h"
 #include "llvm/IR/Instruction.h"
 #include "llvm/IR/Instructions.h"
+#include "llvm/IR/IntrinsicInst.h"
 #include "llvm/IR/Operator.h"
 #include "llvm/IR/PassManager.h"
 #include "llvm/IR/Type.h"
@@ -2129,14 +2130,64 @@
         dbgs() << "LAA: No unsafe dependent memory operations in loop.  We"
                << (PtrRtChecking->Need ? "" : " don't")
                << " need runtime memory checks.\n");
-  else {
-    recordAnalysis("UnsafeMemDep")
-        << "unsafe dependent memory operations in loop. Use "
-           "#pragma loop distribute(enable) to allow loop distribution "
-           "to attempt to isolate the offending operations into a separate "
-           "loop";
-    LLVM_DEBUG(dbgs() << "LAA: unsafe dependent memory operations in loop\n");
+  else
+    emitUnsafeDependenceRemark();
+}
+
+void LoopAccessInfo::emitUnsafeDependenceRemark() {
+  auto Deps = getDepChecker().getDependences();
+  DebugLoc SourceLoc;
+
+  if (!Deps)
+    return;
+  auto Found = std::find_if(
+      Deps->begin(), Deps->end(), [](const MemoryDepChecker::Dependence &D) {
+        return MemoryDepChecker::Dependence::isSafeForVectorization(D.Type) !=
+               MemoryDepChecker::VectorizationSafetyStatus::Safe;
+      });
+  if (Found == Deps->end())
+    return;
+  MemoryDepChecker::Dependence Dep = *Found;
+
+  LLVM_DEBUG(dbgs() << "LAA: unsafe dependent memory operations in loop\n");
+
+  // Emit remark for first unsafe dependence
+  OptimizationRemarkAnalysis &R =
+      recordAnalysis("UnsafeDep", Dep.getDestination(*this))
+      << "unsafe dependent memory operations in loop. Use "
+         "#pragma loop distribute(enable) to allow loop distribution "
+         "to attempt to isolate the offending operations into a separate "
+         "loop";
+
+  switch (Dep.Type) {
+  case MemoryDepChecker::Dependence::NoDep:
+  case MemoryDepChecker::Dependence::Forward:
+  case MemoryDepChecker::Dependence::BackwardVectorizable:
+    llvm_unreachable("Unexpected dependence");
+  case MemoryDepChecker::Dependence::Backward:
+    R << "\nBackward loop carried data dependence.";
+    break;
+  case MemoryDepChecker::Dependence::ForwardButPreventsForwarding:
+    R << "\nForward loop carried data dependence that prevents "
+         "store-to-load forwarding.";
+    break;
+  case MemoryDepChecker::Dependence::BackwardVectorizableButPreventsForwarding:
+    R << "\nBackward loop carried data dependence that prevents "
+         "store-to-load forwarding.";
+    break;
+  case MemoryDepChecker::Dependence::Unknown:
+    R << "\nUnknown data dependence.";
+    break;
+  }
+
+  if (Instruction *I = Dep.getSource(*this)) {
+    SourceLoc = I->getDebugLoc();
+    if (auto *DD = dyn_cast_or_null<Instruction>(getPointerOperand(I)))
+      SourceLoc = DD->getDebugLoc();
   }
+  if (SourceLoc)
+    R << " Memory location is the same as accessed at "
+      << ore::NV("Location", SourceLoc);
 }
 
 bool LoopAccessInfo::blockNeedsPredication(BasicBlock *BB, Loop *TheLoop,
diff --git a/llvm/test/Analysis/LoopAccessAnalysis/depend_diff_types.ll b/llvm/test/Analysis/LoopAccessAnalysis/depend_diff_types.ll
--- a/llvm/test/Analysis/LoopAccessAnalysis/depend_diff_types.ll
+++ b/llvm/test/Analysis/LoopAccessAnalysis/depend_diff_types.ll
@@ -78,6 +78,7 @@
 ; CHECK-LABEL: function 'backdep_type_store_size_equivalence':
 ; CHECK-NEXT:    loop:
 ; CHECK-NEXT:      Report: unsafe dependent memory operations in loop.
+; CHECK-NEXT:      Unknown data dependence.
 ; CHECK-NEXT:      Dependences:
 ; CHECK-NEXT:        Unknown:
 ; CHECK-NEXT:            %ld.f32 = load float, float* %gep.iv.f32, align 8 ->
@@ -120,6 +121,7 @@
 ; CHECK-LABEL: function 'neg_dist_dep_type_size_equivalence':
 ; CHECK-NEXT:    loop:
 ; CHECK-NEXT:      Report: unsafe dependent memory operations in loop.
+; CHECK-NEXT:      Unknown data dependence.
 ; CHECK-NEXT:      Dependences:
 ; CHECK-NEXT:        Unknown:
 ; CHECK-NEXT:            %ld.i64 = load i64, i64* %gep.iv, align 8 ->
diff --git a/llvm/test/Analysis/LoopAccessAnalysis/pointer-phis.ll b/llvm/test/Analysis/LoopAccessAnalysis/pointer-phis.ll
--- a/llvm/test/Analysis/LoopAccessAnalysis/pointer-phis.ll
+++ b/llvm/test/Analysis/LoopAccessAnalysis/pointer-phis.ll
@@ -127,6 +127,7 @@
 ; CHECK-LABEL: 'load_with_pointer_phi_outside_loop'
 ; CHECK-NEXT:  loop.header:
 ; CHECK-NEXT:    Report: unsafe dependent memory operations in loop
+; CHECK-NEXT:    Unknown data dependence.
 ; CHECK-NEXT:    Dependences:
 ; CHECK-NEXT:      Unknown:
 ; CHECK-NEXT:          %v8 = load double, double* %ptr, align 8 ->
@@ -164,6 +165,7 @@
 ; CHECK-LABEL: 'store_with_pointer_phi_outside_loop'
 ; CHECK-NEXT:  loop.header:
 ; CHECK-NEXT:    Report: unsafe dependent memory operations in loop.
+; CHECK-NEXT:    Unknown data dependence.
 ; CHECK-NEXT:    Dependences:
 ; CHECK-NEXT:      Unknown:
 ; CHECK-NEXT:          %v8 = load double, double* %arrayidx, align 8 ->
@@ -201,6 +203,7 @@
 ; CHECK-LABEL: 'store_with_pointer_phi_incoming_phi'
 ; CHECK-NEXT:  loop.header:
 ; CHECK-NEXT:    Report: unsafe dependent memory operations in loop. Use #pragma loop distribute(enable) to allow loop distribution to attempt to isolate the offending operations into a separate loop
+; CHECK-NEXT:    Unknown data dependence.
 ; CHECK-NEXT:    Dependences:
 ; CHECK-NEXT:      Unknown:
 ; CHECK-NEXT:          %v8 = load double, double* %arrayidx, align 8 ->
@@ -277,6 +280,7 @@
 ; CHECK-LABEL: 'store_with_pointer_phi_incoming_phi_irreducible_cycle'
 ; CHECK-NEXT:  loop.header:
 ; CHECK-NEXT:    Report: unsafe dependent memory operations in loop. Use #pragma loop distribute(enable) to allow loop distribution to attempt to isolate the offending operations into a separate loop
+; CHECK-NEXT:    Unknown data dependence.
 ; CHECK-NEXT:    Dependences:
 ; CHECK-NEXT:      Unknown:
 ; CHECK-NEXT:          %v8 = load double, double* %arrayidx, align 8 ->
@@ -348,6 +352,7 @@
 ; CHECK-LABEL: 'store_with_pointer_phi_outside_loop_select'
 ; CHECK-NEXT:  loop.header:
 ; CHECK-NEXT:    Report: unsafe dependent memory operations in loop.
+; CHECK-NEXT:    Unknown data dependence.
 ; CHECK-NEXT:    Dependences:
 ; CHECK-NEXT:      Unknown:
 ; CHECK-NEXT:          %v8 = load double, double* %arrayidx, align 8 ->
@@ -413,6 +418,7 @@
 ; CHECK-LABEL: Loop access info in function 'phi_load_store_memdep_check':
 ; CHECK-NEXT:   for.body:
 ; CHECK-NEXT:    Report: unsafe dependent memory operations in loop. Use #pragma loop distribute(enable) to allow loop distribution to attempt to isolate the offending operations into a separate loop
+; CHECK-NEXT:    Unknown data dependence.
 ; CHECK-NEXT:    Dependences:
 ; CHECK-NEXT:      Unknown:
 ; CHECK-NEXT:          %lv3 = load i16, i16* %c.sink, align 2 ->
diff --git a/llvm/test/Analysis/LoopAccessAnalysis/pointer-with-unknown-bounds.ll b/llvm/test/Analysis/LoopAccessAnalysis/pointer-with-unknown-bounds.ll
--- a/llvm/test/Analysis/LoopAccessAnalysis/pointer-with-unknown-bounds.ll
+++ b/llvm/test/Analysis/LoopAccessAnalysis/pointer-with-unknown-bounds.ll
@@ -13,6 +13,7 @@
 ; CHECK-NEXT: for.body:
 ; CHECK-NEXT:   Report: unsafe dependent memory operations in loop
 ; CHECK-NOT:    Report: cannot identify array bounds
+; CHECK-NEXT:   Unknown data dependence.
 ; CHECK-NEXT:     Dependences:
 ; CHECK-NEXT:       Unknown:
 ; CHECK-NEXT:         %loadA = load i16, i16* %arrayidxA, align 2 ->
diff --git a/llvm/test/Analysis/LoopAccessAnalysis/stride-access-dependence.ll b/llvm/test/Analysis/LoopAccessAnalysis/stride-access-dependence.ll
--- a/llvm/test/Analysis/LoopAccessAnalysis/stride-access-dependence.ll
+++ b/llvm/test/Analysis/LoopAccessAnalysis/stride-access-dependence.ll
@@ -118,6 +118,7 @@
 ; CHECK: function 'unsafe_Read_Write':
 ; CHECK-NEXT:   for.body:
 ; CHECK-NEXT:     Report: unsafe dependent memory operations in loop
+; CHECK-NEXT:     Backward loop carried data dependence.
 ; CHECK-NEXT:     Dependences:
 ; CHECK-NEXT:      Backward:
 ; CHECK-NEXT:           %0 = load i32, i32* %arrayidx, align 4 -> 
@@ -157,6 +158,7 @@
 ; CHECK: function 'unsafe_Write_Read':
 ; CHECK-NEXT:   for.body:
 ; CHECK-NEXT:     Report: unsafe dependent memory operations in loop
+; CHECK-NEXT:     Backward loop carried data dependence.
 ; CHECK-NEXT:     Dependences:
 ; CHECK-NEXT:      Backward:
 ; CHECK-NEXT:           store i32 %0, i32* %arrayidx, align 4 ->
@@ -193,6 +195,7 @@
 ; CHECK: function 'unsafe_Write_Write':
 ; CHECK-NEXT:   for.body:
 ; CHECK-NEXT:     Report: unsafe dependent memory operations in loop
+; CHECK-NEXT:     Backward loop carried data dependence.
 ; CHECK-NEXT:     Dependences:
 ; CHECK-NEXT:      Backward:
 ; CHECK-NEXT:           store i32 %0, i32* %arrayidx, align 4 ->
@@ -346,6 +349,7 @@
 ; CHECK: function 'vectorizable_unscaled_Read_Write':
 ; CHECK-NEXT:   for.body:
 ; CHECK-NEXT:     Report: unsafe dependent memory operations in loop
+; CHECK-NEXT:     Backward loop carried data dependence that prevents store-to-load forwarding.
 ; CHECK-NEXT:     Dependences:
 ; CHECK-NEXT:       BackwardVectorizableButPreventsForwarding:
 ; CHECK-NEXT:           %2 = load i32, i32* %arrayidx, align 4 ->
@@ -425,6 +429,7 @@
 ; CHECK: function 'unsafe_unscaled_Read_Write':
 ; CHECK-NEXT:   for.body:
 ; CHECK-NEXT:     Report: unsafe dependent memory operations in loop
+; CHECK-NEXT:     Backward loop carried data dependence.
 ; CHECK-NEXT:     Dependences:
 ; CHECK-NEXT:       Backward:
 ; CHECK-NEXT:           %2 = load i32, i32* %arrayidx, align 4 -> 
@@ -455,6 +460,7 @@
 ; CHECK: function 'unsafe_unscaled_Read_Write2':
 ; CHECK-NEXT:   for.body:
 ; CHECK-NEXT:     Report: unsafe dependent memory operations in loop
+; CHECK-NEXT:     Backward loop carried data dependence.
 ; CHECK-NEXT:     Dependences:
 ; CHECK-NEXT:       Backward:
 ; CHECK-NEXT:           %2 = load i32, i32* %arrayidx, align 4 -> 
@@ -505,6 +511,7 @@
 ; CHECK: function 'interleaved_stores':
 ; CHECK-NEXT:   for.body:
 ; CHECK-NEXT:     Report: unsafe dependent memory operations in loop
+; CHECK-NEXT:     Backward loop carried data dependence.
 ; CHECK-NEXT:     Dependences:
 ; CHECK-NEXT:       Backward:
 ; CHECK-NEXT:           store i32 %4, i32* %arrayidx5, align 4 -> 
diff --git a/llvm/test/Analysis/LoopAccessAnalysis/symbolic-stride.ll b/llvm/test/Analysis/LoopAccessAnalysis/symbolic-stride.ll
--- a/llvm/test/Analysis/LoopAccessAnalysis/symbolic-stride.ll
+++ b/llvm/test/Analysis/LoopAccessAnalysis/symbolic-stride.ll
@@ -8,6 +8,7 @@
 ; CHECK-LABEL: Loop access info in function 'single_stride':
 ; CHECK-NEXT:  loop:
 ; CHECK-NEXT:    Report: unsafe dependent memory operations in loop.
+; CHECK-NEXT:    Backward loop carried data dependence.
 ; CHECK-NEXT:    Dependences:
 ; CHECK-NEXT:      Backward:
 ; CHECK-NEXT:          %load = load i32, i32* %gep.A, align 4 ->
@@ -51,6 +52,7 @@
 ; CHECK-LABEL: Loop access info in function 'single_stride_struct':
 ; CHECK-NEXT:  loop:
 ; CHECK-NEXT:    Report: unsafe dependent memory operations in loop.
+; CHECK-NEXT:    Backward loop carried data dependence.
 ; CHECK-NEXT:    Dependences:
 ; CHECK-NEXT:      Backward:
 ; CHECK-NEXT:          %load = load { i32, i8 }, { i32, i8 }* %gep.A, align 4 ->
@@ -97,6 +99,7 @@
 ; CHECK-LABEL: Loop access info in function 'two_strides':
 ; CHECK-NEXT:  loop:
 ; CHECK-NEXT:    Report: unsafe dependent memory operations in loop.
+; CHECK-NEXT:    Backward loop carried data dependence.
 ; CHECK-NEXT:    Dependences:
 ; CHECK-NEXT:      Backward:
 ; CHECK-NEXT:          %load = load i32, i32* %gep.A, align 4 ->
diff --git a/llvm/test/Analysis/LoopAccessAnalysis/underlying-objects-2.ll b/llvm/test/Analysis/LoopAccessAnalysis/underlying-objects-2.ll
--- a/llvm/test/Analysis/LoopAccessAnalysis/underlying-objects-2.ll
+++ b/llvm/test/Analysis/LoopAccessAnalysis/underlying-objects-2.ll
@@ -39,6 +39,7 @@
 ; CHECK-LABEL: function 'f'
 ; CHECK: for_j.body:
 ; CHECK-NEXT: Report: unsafe dependent memory operations in loop
+; CHECK-NEXT: Backward loop carried data dependence.
 ; CHECK-NEXT: Dependences:
 ; CHECK-NEXT: Backward:
 ; CHECK-NEXT: %loadB = load i8, i8* %gepB, align 1 ->
diff --git a/llvm/test/Analysis/LoopAccessAnalysis/unsafe-and-rt-checks.ll b/llvm/test/Analysis/LoopAccessAnalysis/unsafe-and-rt-checks.ll
--- a/llvm/test/Analysis/LoopAccessAnalysis/unsafe-and-rt-checks.ll
+++ b/llvm/test/Analysis/LoopAccessAnalysis/unsafe-and-rt-checks.ll
@@ -8,6 +8,7 @@
 target triple = "x86_64-apple-macosx10.10.0"
 
 ; CHECK: Report: unsafe dependent memory operations in loop
+; CHECK-NEXT:  Backward loop carried data dependence.
 ; CHECK-NEXT: Dependences:
 ; CHECK-NEXT:   Backward:
 ; CHECK-NEXT:     %loadA = load i16, i16* %arrayidxA, align 2 ->
diff --git a/llvm/test/Transforms/LoopVectorize/diag-with-hotness-info-2.ll b/llvm/test/Transforms/LoopVectorize/diag-with-hotness-info-2.ll
--- a/llvm/test/Transforms/LoopVectorize/diag-with-hotness-info-2.ll
+++ b/llvm/test/Transforms/LoopVectorize/diag-with-hotness-info-2.ll
@@ -22,9 +22,12 @@
 ;  19	  }
 ;  20	}
 
-; CHECK: remark: /tmp/s.c:2:3: loop not vectorized: unsafe dependent memory operations in loop. Use #pragma loop distribute(enable) to allow loop distribution to attempt to isolate the offending operations into a separate loop (hotness: 300)
-; CHECK: remark: /tmp/s.c:9:3: loop not vectorized: unsafe dependent memory operations in loop. Use #pragma loop distribute(enable) to allow loop distribution to attempt to isolate the offending operations into a separate loop (hotness: 5000)
-; CHECK: remark: /tmp/s.c:16:3: loop not vectorized: unsafe dependent memory operations in loop. Use #pragma loop distribute(enable) to allow loop distribution to attempt to isolate the offending operations into a separate loop{{$}}
+; CHECK: remark: /tmp/s.c:3:14: loop not vectorized: unsafe dependent memory operations in loop. Use #pragma loop distribute(enable) to allow loop distribution to attempt to isolate the offending operations into a separate loop
+; CHECK-NEXT: Backward loop carried data dependence. Memory location is the same as accessed at /tmp/s.c:3:16 (hotness: 300)
+; CHECK: remark: /tmp/s.c:10:14: loop not vectorized: unsafe dependent memory operations in loop. Use #pragma loop distribute(enable) to allow loop distribution to attempt to isolate the offending operations into a separate loop
+; CHECK-NEXT: Backward loop carried data dependence. Memory location is the same as accessed at /tmp/s.c:10:16 (hotness: 5000)
+; CHECK: remark: /tmp/s.c:17:14: loop not vectorized: unsafe dependent memory operations in loop. Use #pragma loop distribute(enable) to allow loop distribution to attempt to isolate the offending operations into a separate loop
+; CHECK-NEXT: Backward loop carried data dependence. Memory location is the same as accessed at /tmp/s.c:17:16{{$}}
 
 ; ModuleID = '/tmp/s.c'
 source_filename = "/tmp/s.c"
diff --git a/llvm/test/Transforms/LoopVectorize/memory-dep-remarks.ll b/llvm/test/Transforms/LoopVectorize/memory-dep-remarks.ll
new file mode 100644
--- /dev/null
+++ b/llvm/test/Transforms/LoopVectorize/memory-dep-remarks.ll
@@ -0,0 +1,403 @@
+; RUN: opt -passes='loop(require<access-info>),function(loop-vectorize)' -disable-output -pass-remarks-analysis=loop-vectorize < %s 2>&1 | FileCheck %s
+; RUN: opt < %s -passes='loop(require<access-info>),function(loop-vectorize)' -o /dev/null -pass-remarks-output=%t.yaml
+; RUN: cat %t.yaml | FileCheck -check-prefix=YAML %s
+
+target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128"
+
+; // a) Dependence::NoDep
+; // Loop containing only reads (here of the array A) does not hinder vectorization
+; void test_nodep(int n, int* A, int* B) {
+;   for(int i = 1; i < n ; ++i) {
+;     B[i] = A[i-1] + A[i+2];
+;   }
+; }
+
+; CHECK-NOT: remark: source.c:{{0-9]+}}:{{[0-9]+}}:
+
+define void @test_nodep(i64 %n, i32* nocapture readonly %A, i32* nocapture %B) !dbg !44 {
+entry:
+  %cmp12 = icmp sgt i64 %n, 1
+  br i1 %cmp12, label %for.body, label %for.cond.cleanup
+
+for.body:                                         ; preds = %entry, %for.body
+  %indvars.iv = phi i64 [ 1, %entry ], [ %indvars.iv.next, %for.body ]
+  %0 = add nsw i64 %indvars.iv, -1
+  %arrayidx = getelementptr inbounds i32, i32* %A, i64 %0, !dbg !61
+  %1 = load i32, i32* %arrayidx, align 4, !dbg !61
+  %2 = add nuw nsw i64 %indvars.iv, 2
+  %arrayidx2 = getelementptr inbounds i32, i32* %A, i64 %2, !dbg !63
+  %3 = load i32, i32* %arrayidx2, align 4, !dbg !63
+  %add3 = add nsw i32 %3, %1
+  %arrayidx5 = getelementptr inbounds i32, i32* %B, i64 %indvars.iv
+  store i32 %add3, i32* %arrayidx5, align 4
+  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
+  %exitcond.not = icmp eq i64 %indvars.iv.next, %n
+  br i1 %exitcond.not, label %for.cond.cleanup, label %for.body
+
+for.cond.cleanup:                                 ; preds = %for.body, %entry
+  ret void
+}
+
+
+; // b) Dependence::Forward
+; // Loop gets vectorized since it contains only a forward
+; // dependency between A[i-2] and A[i]
+; void test_forward(int n, int* A, int* B) {
+;   for(int i=1; i < n; ++i) {
+;     A[i] = 10;
+;     B[i] = A[i-2];
+;   }
+; }
+
+; CHECK-NOT: remark: source.c:{{0-9]+}}:{{[0-9]+}}:
+define dso_local void @test_forward(i64 %n, i32* nocapture %A, i32* nocapture %B) !dbg !70 {
+entry:
+  %cmp11 = icmp sgt i64 %n, 1
+  br i1 %cmp11, label %for.body, label %for.cond.cleanup, !dbg !81
+
+for.body:                                         ; preds = %entry, %for.body
+  %indvars.iv = phi i64 [ 1, %entry ], [ %indvars.iv.next, %for.body ]
+  %arrayidx = getelementptr inbounds i32, i32* %A, i64 %indvars.iv, !dbg !83
+  store i32 10, i32* %arrayidx, align 4
+  %0 = add nsw i64 %indvars.iv, -2
+  %arrayidx2 = getelementptr inbounds i32, i32* %A, i64 %0, !dbg !87
+  %1 = load i32, i32* %arrayidx2, align 4, !dbg !87
+  %arrayidx4 = getelementptr inbounds i32, i32* %B, i64 %indvars.iv, !dbg !88
+  store i32 %1, i32* %arrayidx4, align 4, !dbg !89
+  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
+  %exitcond.not = icmp eq i64 %indvars.iv.next, %n
+  br i1 %exitcond.not, label %for.cond.cleanup, label %for.body, !dbg !81
+
+  for.cond.cleanup:                                 ; preds = %for.body, %entry
+    ret void
+}
+
+
+; // c) Dependence::BackwardVectorizable
+; // Loop gets vectorized since it contains a backward dependency
+; // between A[i] and A[i-4], but the dependency distance (4) is
+; // greater than the minimum possible VF (2 in this case)
+; void test_backwardVectorizable(int n, int* A) {
+;   for(int i=4; i < n; ++i) {
+;     A[i] = A[i-4] + 1;
+;   }
+; }
+
+; CHECK-NOT: remark: source.c:{{0-9]+}}:{{[0-9]+}}:
+
+define dso_local void @test_backwardVectorizable(i64 %n, i32* nocapture %A) !dbg !93 {
+entry:
+  %cmp8 = icmp sgt i64 %n, 4
+  br i1 %cmp8, label %for.body, label %for.cond.cleanup
+
+for.body:                                         ; preds = %entry, %for.body
+  %indvars.iv = phi i64 [ 4, %entry ], [ %indvars.iv.next, %for.body ]
+  %0 = add nsw i64 %indvars.iv, -4, !dbg !106
+  %arrayidx = getelementptr inbounds i32, i32* %A, i64 %0, !dbg !108
+  %1 = load i32, i32* %arrayidx, align 4, !dbg !108
+  %add = add nsw i32 %1, 1
+  %arrayidx2 = getelementptr inbounds i32, i32* %A, i64 %indvars.iv, !dbg !110
+  store i32 %add, i32* %arrayidx2, align 4, !dbg !111
+  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
+  %exitcond.not = icmp eq i64 %indvars.iv.next, %n
+  br i1 %exitcond.not, label %for.cond.cleanup, label %for.body
+
+  for.cond.cleanup:                                 ; preds = %for.body, %entry
+    ret void
+}
+
+; // d) Dependence::Backward
+; // Loop does not get vectorized since it contains a backward
+; // dependency between A[i] and A[i+3].
+; void test_backward_dep(int n, int *A) {
+;   for (int i = 1; i <= n - 3; i += 3) {
+;     A[i] = A[i-1];
+;     A[i+1] = A[i+3];
+;   }
+; }
+
+; CHECK: remark: source.c:48:14: loop not vectorized: unsafe dependent memory operations in loop. Use #pragma loop distribute(enable) to allow loop distribution to attempt to isolate the offending operations into a separate loop
+; CHECK-NEXT: Backward loop carried data dependence. Memory location is the same as accessed at source.c:47:5
+
+define void @test_backward_dep(i64 %n, i32* nocapture %A) {
+entry:
+  %cmp.not19 = icmp slt i64 %n, 4
+  br i1 %cmp.not19, label %for.cond.cleanup, label %for.body.preheader
+
+for.body.preheader:                               ; preds = %entry
+  %sub = add nsw i64 %n, -3
+  br label %for.body
+
+for.body:                                         ; preds = %for.body.preheader, %for.body
+  %indvars.iv = phi i64 [ 1, %for.body.preheader ], [ %indvars.iv.next, %for.body ]
+  %0 = add nsw i64 %indvars.iv, -1
+  %arrayidx = getelementptr inbounds i32, i32* %A, i64 %0
+  %1 = load i32, i32* %arrayidx, align 8
+  %arrayidx3 = getelementptr inbounds i32, i32* %A, i64 %indvars.iv, !dbg !157
+  store i32 %1, i32* %arrayidx3, align 8
+  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 3
+  %arrayidx5 = getelementptr inbounds i32, i32* %A, i64 %indvars.iv.next, !dbg !160
+  %2 = load i32, i32* %arrayidx5, align 8, !dbg !160
+  %3 = add nuw nsw i64 %indvars.iv, 1
+  %arrayidx8 = getelementptr inbounds i32, i32* %A, i64 %3
+  store i32 %2, i32* %arrayidx8, align 8
+  %cmp.not = icmp ugt i64 %indvars.iv.next, %n
+  br i1 %cmp.not, label %for.cond.cleanup, label %for.body
+
+  for.cond.cleanup:                                 ; preds = %for.body, %entry
+    ret void
+}
+
+; // e) Dependence::ForwardButPreventsForwarding
+; // Loop does not get vectorized despite only having a forward
+; // dependency between A[i] and A[i-3].
+; // This is because the store-to-load forwarding distance (here 3)
+; // needs to be a multiple of vector factor otherwise the
+; // store (A[5:6] in i=5) and load (A[4:5],A[6:7] in i=7,9) are unaligned.
+; void test_forwardButPreventsForwarding_dep(int n, int* A, int* B) {
+;   for(int i=3; i < n; ++i) {
+;     A[i] = 10;
+;     B[i] = A[i-3];
+;   }
+; }
+
+; CHECK: remark: source.c:61:12: loop not vectorized: unsafe dependent memory operations in loop. Use #pragma loop distribute(enable) to allow loop distribution to attempt to isolate the offending operations into a separate loop
+; CHECK-NEXT: Forward loop carried data dependence that prevents store-to-load forwarding. Memory location is the same as accessed at source.c:60:5
+
+define void @test_forwardButPreventsForwarding_dep(i64 %n, i32* nocapture %A, i32* nocapture %B) !dbg !166 {
+entry:
+  %cmp11 = icmp sgt i64 %n, 3
+  br i1 %cmp11, label %for.body, label %for.cond.cleanup
+
+for.body:                                         ; preds = %entry, %for.body
+  %indvars.iv = phi i64 [ 3, %entry ], [ %indvars.iv.next, %for.body ]
+  %arrayidx = getelementptr inbounds i32, i32* %A, i64 %indvars.iv, !dbg !179
+  store i32 10, i32* %arrayidx, align 4
+  %0 = add nsw i64 %indvars.iv, -3
+  %arrayidx2 = getelementptr inbounds i32, i32* %A, i64 %0, !dbg !183
+  %1 = load i32, i32* %arrayidx2, align 4, !dbg !183
+  %arrayidx4 = getelementptr inbounds i32, i32* %B, i64 %indvars.iv
+  store i32 %1, i32* %arrayidx4, align 4
+  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
+  %exitcond.not = icmp eq i64 %indvars.iv.next, %n
+  br i1 %exitcond.not, label %for.cond.cleanup, label %for.body
+
+  for.cond.cleanup:                                 ; preds = %for.body, %entry
+    ret void
+}
+
+; // f) Dependence::BackwardVectorizableButPreventsForwarding
+; // Loop does not get vectorized despite having a backward
+; // but vectorizable dependency between A[i] and A[i-15].
+; //
+; // This is because the store-to-load forwarding distance (here 15)
+; // needs to be a multiple of vector factor otherwise
+; // store (A[16:17] in i=16) and load (A[15:16], A[17:18] in i=30,32) are unaligned.
+; void test_backwardVectorizableButPreventsForwarding(int n, int* A) {
+;   for(int i=15; i < n; ++i) {
+;     A[i] = A[i-2] + A[i-15];
+;   }
+; }
+
+; CHECK: remark: source.c:74:5: loop not vectorized: unsafe dependent memory operations in loop. Use #pragma loop distribute(enable) to allow loop distribution to attempt to isolate the offending operations into a separate loop
+; CHECK: Backward loop carried data dependence that prevents store-to-load forwarding. Memory location is the same as accessed at source.c:74:21
+
+define void @test_backwardVectorizableButPreventsForwarding(i64 %n, i32* nocapture %A) !dbg !189 {
+entry:
+  %cmp13 = icmp sgt i64 %n, 15
+  br i1 %cmp13, label %for.body, label %for.cond.cleanup
+
+for.body:                                         ; preds = %entry, %for.body
+  %indvars.iv = phi i64 [ 15, %entry ], [ %indvars.iv.next, %for.body ]
+  %0 = add nsw i64 %indvars.iv, -2
+  %arrayidx = getelementptr inbounds i32, i32* %A, i64 %0
+  %1 = load i32, i32* %arrayidx, align 4
+  %2 = add nsw i64 %indvars.iv, -15
+  %arrayidx3 = getelementptr inbounds i32, i32* %A, i64 %2, !dbg !207
+  %3 = load i32, i32* %arrayidx3, align 4
+  %add = add nsw i32 %3, %1
+  %arrayidx5 = getelementptr inbounds i32, i32* %A, i64 %indvars.iv, !dbg !209
+  store i32 %add, i32* %arrayidx5, align 4, !dbg !209
+  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
+  %exitcond.not = icmp eq i64 %indvars.iv.next, %n
+  br i1 %exitcond.not, label %for.cond.cleanup, label %for.body
+
+  for.cond.cleanup:                                 ; preds = %for.body, %entry
+    ret void
+}
+
+; // g) Dependence::Unknown
+; // Different stride lengths
+; void test_unknown_dep(int n, int* A) {
+;   for(int i=0; i < n; ++i) {
+;       A[(i+1)*4] = 10;
+;       A[i] = 100;
+;   }
+; }
+
+; CHECK: remark: source.c:83:7: loop not vectorized: unsafe dependent memory operations in loop. Use #pragma loop distribute(enable) to allow loop distribution to attempt to isolate the offending operations into a separate loop
+; CHECK: Unknown data dependence. Memory location is the same as accessed at source.c:82:7
+
+define void @test_unknown_dep(i64 %n, i32* nocapture %A) !dbg !214 {
+entry:
+  %cmp8 = icmp sgt i64 %n, 0
+  br i1 %cmp8, label %for.body, label %for.cond.cleanup
+
+for.body:                                         ; preds = %entry, %for.body
+  %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
+  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
+  %0 = shl nsw i64 %indvars.iv.next, 2
+  %arrayidx = getelementptr inbounds i32, i32* %A, i64 %0, !dbg !229
+  store i32 10, i32* %arrayidx, align 4
+  %arrayidx2 = getelementptr inbounds i32, i32* %A, i64 %indvars.iv, !dbg !231
+  store i32 100, i32* %arrayidx2, align 4, !dbg !231
+  %exitcond.not = icmp eq i64 %indvars.iv.next, %n
+  br i1 %exitcond.not, label %for.cond.cleanup, label %for.body
+
+  for.cond.cleanup:                                 ; preds = %for.body, %entry
+    ret void
+}
+
+; YAML:      --- !Analysis
+; YAML-NEXT: Pass:            loop-vectorize
+; YAML-NEXT: Name:            UnsafeDep
+; YAML-NEXT: DebugLoc:        { File: source.c, Line: 48, Column: 14 }
+; YAML-NEXT: Function:        test_backward_dep
+; YAML-NEXT: Args:
+; YAML-NEXT:   - String:          'loop not vectorized: '
+; YAML-NEXT:   - String:          'unsafe dependent memory operations in loop. Use #pragma loop distribute(enable) to allow loop distribution to attempt to isolate the offending operations into a separate loop'
+; YAML-NEXT:   - String:          "\nBackward loop carried data dependence."
+; YAML-NEXT:   - String:          ' Memory location is the same as accessed at '
+; YAML-NEXT:   - Location:        'source.c:47:5'
+; YAML-NEXT:     DebugLoc:        { File: source.c, Line: 47, Column: 5 }
+; YAML-NEXT: ...
+; YAML-NEXT: --- !Missed
+; YAML-NEXT: Pass:            loop-vectorize
+; YAML-NEXT: Name:            MissedDetails
+; YAML-NEXT: Function:        test_backward_dep
+; YAML-NEXT: Args:
+; YAML-NEXT:   - String:          loop not vectorized
+; YAML-NEXT: ...
+; YAML-NEXT: --- !Analysis
+; YAML-NEXT: Pass:            loop-vectorize
+; YAML-NEXT: Name:            UnsafeDep
+; YAML-NEXT: DebugLoc:        { File: source.c, Line: 61, Column: 12 }
+; YAML-NEXT: Function:        test_forwardButPreventsForwarding_dep
+; YAML-NEXT: Args:
+; YAML-NEXT:   - String:          'loop not vectorized: '
+; YAML-NEXT:   - String:          'unsafe dependent memory operations in loop. Use #pragma loop distribute(enable) to allow loop distribution to attempt to isolate the offending operations into a separate loop'
+; YAML-NEXT:   - String:          "\nForward loop carried data dependence that prevents store-to-load forwarding."
+; YAML-NEXT:   - String:          ' Memory location is the same as accessed at '
+; YAML-NEXT:   - Location:        'source.c:60:5'
+; YAML-NEXT:     DebugLoc:        { File: source.c, Line: 60, Column: 5 }
+; YAML-NEXT: ...
+; YAML-NEXT: --- !Missed
+; YAML-NEXT: Pass:            loop-vectorize
+; YAML-NEXT: Name:            MissedDetails
+; YAML-NEXT: Function:        test_forwardButPreventsForwarding_dep
+; YAML-NEXT: Args:
+; YAML-NEXT:   - String:          loop not vectorized
+; YAML-NEXT: ...
+; YAML-NEXT: --- !Analysis
+; YAML-NEXT: Pass:            loop-vectorize
+; YAML-NEXT: Name:            UnsafeDep
+; YAML-NEXT: DebugLoc:        { File: source.c, Line: 74, Column: 5 }
+; YAML-NEXT: Function:        test_backwardVectorizableButPreventsForwarding
+; YAML-NEXT: Args:
+; YAML-NEXT:   - String:          'loop not vectorized: '
+; YAML-NEXT:   - String:          'unsafe dependent memory operations in loop. Use #pragma loop distribute(enable) to allow loop distribution to attempt to isolate the offending operations into a separate loop'
+; YAML-NEXT:   - String:          "\nBackward loop carried data dependence that prevents store-to-load forwarding."
+; YAML-NEXT:   - String:          ' Memory location is the same as accessed at '
+; YAML-NEXT:   - Location:        'source.c:74:21'
+; YAML-NEXT:     DebugLoc:        { File: source.c, Line: 74, Column: 21 }
+; YAML-NEXT: ...
+; YAML-NEXT: --- !Missed
+; YAML-NEXT: Pass:            loop-vectorize
+; YAML-NEXT: Name:            MissedDetails
+; YAML-NEXT: Function:        test_backwardVectorizableButPreventsForwarding
+; YAML-NEXT: Args:
+; YAML-NEXT:   - String:          loop not vectorized
+; YAML-NEXT: ...
+; YAML-NEXT: --- !Analysis
+; YAML-NEXT: Pass:            loop-vectorize
+; YAML-NEXT: Name:            UnsafeDep
+; YAML-NEXT: DebugLoc:        { File: source.c, Line: 83, Column: 7 }
+; YAML-NEXT: Function:        test_unknown_dep
+; YAML-NEXT: Args:
+; YAML-NEXT:   - String:          'loop not vectorized: '
+; YAML-NEXT:   - String:          'unsafe dependent memory operations in loop. Use #pragma loop distribute(enable) to allow loop distribution to attempt to isolate the offending operations into a separate loop'
+; YAML-NEXT:   - String:          "\nUnknown data dependence."
+; YAML-NEXT:   - String:          ' Memory location is the same as accessed at '
+; YAML-NEXT:   - Location:        'source.c:82:7'
+; YAML-NEXT:     DebugLoc:        { File: source.c, Line: 82, Column: 7 }
+; YAML-NEXT: ...
+; YAML-NEXT: --- !Missed
+; YAML-NEXT: Pass:            loop-vectorize
+; YAML-NEXT: Name:            MissedDetails
+; YAML-NEXT: Function:        test_unknown_dep
+; YAML-NEXT: Args:
+; YAML-NEXT:   - String:          loop not vectorized
+; YAML-NEXT: ...
+
+
+!llvm.dbg.cu = !{!0}
+!llvm.module.flags = !{!4}
+
+!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 14.0.0 (https://github.com/llvm/llvm-project.git 54f0f826c5c7d0ff16c230b259cb6aad33e18d97)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None)
+!1 = !DIFile(filename: "source.c", directory: "")
+!2 = !{}
+!4 = !{i32 2, !"Debug Info Version", i32 3}
+!44 = distinct !DISubprogram(name: "test_nodep", scope: !1, file: !1, line: 14, type: !45, scopeLine: 14, unit: !0, retainedNodes: !2)
+!45 = !DISubroutineType(types: !46)
+!46 = !{null, !18, !16, !16}
+!16 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !17, size: 64)
+!17 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
+!18 = !DIBasicType(name: "int", size: 64, encoding: DW_ATE_signed)
+!52 = distinct !DILexicalBlock(scope: !44, file: !1, line: 15, column: 3)
+!56 = distinct !DILexicalBlock(scope: !52, file: !1, line: 15, column: 3)
+!60 = distinct !DILexicalBlock(scope: !56, file: !1, line: 15, column: 31)
+!61 = !DILocation(line: 16, column: 12, scope: !60)
+!63 = !DILocation(line: 16, column: 21, scope: !60)
+!70 = distinct !DISubprogram(name: "test_forward", scope: !1, file: !1, line: 24, type: !45, scopeLine: 24, unit: !0, retainedNodes: !2)
+!77 = distinct !DILexicalBlock(scope: !70, file: !1, line: 25, column: 3)
+!80 = distinct !DILexicalBlock(scope: !77, file: !1, line: 25, column: 3)
+!81 = !DILocation(line: 25, column: 3, scope: !77)
+!83 = !DILocation(line: 26, column: 5, scope: !84)
+!84 = distinct !DILexicalBlock(scope: !80, file: !1, line: 25, column: 28)
+!87 = !DILocation(line: 27, column: 12, scope: !84)
+!88 = !DILocation(line: 27, column: 5, scope: !84)
+!89 = !DILocation(line: 27, column: 10, scope: !84)
+!93 = distinct !DISubprogram(name: "test_backwardVectorizable", scope: !1, file: !1, line: 36, type: !95, scopeLine: 36, unit: !0, retainedNodes: !2)
+!95 = !DISubroutineType(types: !96)
+!96 = !{null, !18, !16}
+!99 = distinct !DILexicalBlock(scope: !93, file: !1, line: 37, column: 3)
+!103 = distinct !DILexicalBlock(scope: !99, file: !1, line: 37, column: 3)
+!106 = !DILocation(line: 38, column: 15, scope: !107)
+!107 = distinct !DILexicalBlock(scope: !103, file: !1, line: 37, column: 28)
+!108 = !DILocation(line: 38, column: 12, scope: !107)
+!110 = !DILocation(line: 38, column: 5, scope: !107)
+!111 = !DILocation(line: 38, column: 10, scope: !107)
+!136 = distinct !DISubprogram(name: "test_backward_dep", scope: !1, file: !1, line: 45, type: !95, scopeLine: 45, unit: !0, retainedNodes: !2)
+!145 = distinct !DILexicalBlock(scope: !136, file: !1, line: 46, column: 3)
+!149 = distinct !DILexicalBlock(scope: !145, file: !1, line: 46, column: 3)
+!153 = distinct !DILexicalBlock(scope: !149, file: !1, line: 46, column: 39)
+!157 = !DILocation(line: 47, column: 5, scope: !153)
+!160 = !DILocation(line: 48, column: 14, scope: !153)
+!166 = distinct !DISubprogram(name: "test_forwardButPreventsForwarding_dep", scope: !1, file: !1, line: 58, type: !45, scopeLine: 58, unit: !0, retainedNodes: !2)
+!172 = distinct !DILexicalBlock(scope: !166, file: !1, line: 59, column: 3)
+!176 = distinct !DILexicalBlock(scope: !172, file: !1, line: 59, column: 3)
+!179 = !DILocation(line: 60, column: 5, scope: !180)
+!180 = distinct !DILexicalBlock(scope: !176, file: !1, line: 59, column: 28)
+!183 = !DILocation(line: 61, column: 12, scope: !180)
+!189 = distinct !DISubprogram(name: "test_backwardVectorizableButPreventsForwarding", scope: !1, file: !1, line: 72, type: !95, scopeLine: 72, unit: !0, retainedNodes: !2)
+!196 = distinct !DILexicalBlock(scope: !189, file: !1, line: 73, column: 3)
+!200 = distinct !DILexicalBlock(scope: !196, file: !1, line: 73, column: 3)
+!204 = distinct !DILexicalBlock(scope: !200, file: !1, line: 73, column: 29)
+!207 = !DILocation(line: 74, column: 21, scope: !204)
+!209 = !DILocation(line: 74, column: 5, scope: !204)
+!214 = distinct !DISubprogram(name: "test_unknown_dep", scope: !1, file: !1, line: 80, type: !95, scopeLine: 80, unit: !0, retainedNodes: !2)
+!219 = distinct !DILexicalBlock(scope: !214, file: !1, line: 81, column: 3)
+!223 = distinct !DILexicalBlock(scope: !219, file: !1, line: 81, column: 3)
+!227 = distinct !DILexicalBlock(scope: !223, file: !1, line: 81, column: 28)
+!229 = !DILocation(line: 82, column: 7, scope: !227)
+!231 = !DILocation(line: 83, column: 7, scope: !227)
diff --git a/llvm/test/Transforms/LoopVectorize/unsafe-dep-remark.ll b/llvm/test/Transforms/LoopVectorize/unsafe-dep-remark.ll
--- a/llvm/test/Transforms/LoopVectorize/unsafe-dep-remark.ll
+++ b/llvm/test/Transforms/LoopVectorize/unsafe-dep-remark.ll
@@ -11,7 +11,7 @@
 ;     5	  }
 ;     6	}
 
-; CHECK: remark: /tmp/kk.c:2:3: loop not vectorized: unsafe dependent memory operations in loop. Use #pragma loop distribute(enable) to allow loop distribution to attempt to isolate the offending operations into a separate loop
+; CHECK: remark: /tmp/kk.c:3:14: loop not vectorized: unsafe dependent memory operations in loop. Use #pragma loop distribute(enable) to allow loop distribution to attempt to isolate the offending operations into a separate loop
 
 define void @success(i8* nocapture %A, i8* nocapture readonly %B, i8* nocapture %C, i8* nocapture readonly %D, i8* nocapture readonly %E, i32 %N) !dbg !6 {
 entry: