Index: llvm/lib/Transforms/InstCombine/InstCombineVectorOps.cpp
===================================================================
--- llvm/lib/Transforms/InstCombine/InstCombineVectorOps.cpp
+++ llvm/lib/Transforms/InstCombine/InstCombineVectorOps.cpp
@@ -430,6 +430,52 @@
       // be the same value, extract from the pre-inserted value instead.
       if (isa<Constant>(IE->getOperand(2)) && IndexC)
         return replaceOperand(EI, 0, IE->getOperand(0));
+    } else if (auto *GEP = dyn_cast<GetElementPtrInst>(I)) {
+      if (IndexC && GEP->hasOneUse() && GEP->getNumOperands() == 2) {
+        uint64_t IdxVal = IndexC->getZExtValue();
+        auto *VecType = cast<VectorType>(GEP->getType());
+        ElementCount EC = VecType->getElementCount();
+        if (IdxVal < EC.getKnownMinValue()) {
+          // Find out why we have a vector result - there are three
+          // possibilities:
+          //  1. We have a scalar pointer and a vector of indices, or
+          //  2. We have a vector of pointers and a scalar index, or
+          //  3. We have a vector of pointers and a vector of indices.
+          // Here we only consider combining for the first two cases, since for
+          // the last case the optimization is less obviously a win due to
+          // needing two extractelements instead of one.
+          Type *IdxType = GEP->getOperand(1)->getType();
+          Type *NewElType = nullptr;
+          Value *NewPtr = nullptr, *NewIdx = nullptr;
+          if (VecType->getElementType() == GEP->getPointerOperandType()) {
+            assert(isa<VectorType>(IdxType) &&
+                   EC == cast<VectorType>(IdxType)->getElementCount() &&
+                   "Expected 2nd GEP operand to be a vector of indices with "
+                   "same element count as the result");
+            // Extract the vector index and create a new GEP with a scalar
+            // result.
+            NewElType = cast<PointerType>(GEP->getPointerOperandType())
+                            ->getElementType();
+            NewPtr = GEP->getPointerOperand();
+            NewIdx = Builder.CreateExtractElement(GEP->getOperand(1), IndexC);
+          } else if (VecType == GEP->getPointerOperandType() &&
+                     IdxType->isIntegerTy()) {
+            // Extract the pointer and create a new GEP with a scalar result.
+            NewElType =
+                cast<PointerType>(VecType->getElementType())->getElementType();
+            NewPtr =
+                Builder.CreateExtractElement(GEP->getPointerOperand(), IndexC);
+            NewIdx = GEP->getOperand(1);
+          }
+          if (NewPtr) {
+            GetElementPtrInst *NewGEP =
+                GetElementPtrInst::Create(NewElType, NewPtr, {NewIdx});
+            NewGEP->setIsInBounds(GEP->isInBounds());
+            return NewGEP;
+          }
+        }
+      }
+      return nullptr;
     } else if (auto *SVI = dyn_cast<ShuffleVectorInst>(I)) {
       // If this is extracting an element from a shufflevector, figure out where
       // it came from and extract from the appropriate input element instead.
Index: llvm/test/Transforms/InstCombine/gep-vector-indices.ll
===================================================================
--- /dev/null
+++ llvm/test/Transforms/InstCombine/gep-vector-indices.ll
@@ -0,0 +1,118 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt -instcombine %s -S | FileCheck %s
+
+define i32* @vector_splat_indices_v2i64_ext0(i32* %a) {
+; CHECK-LABEL: @vector_splat_indices_v2i64_ext0(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    [[RES:%.*]] = getelementptr i32, i32* [[A:%.*]], i64 4
+; CHECK-NEXT:    ret i32* [[RES]]
+;
+entry:
+  %tmp = insertelement <2 x i64> poison, i64 4, i32 0
+  %splatof4 = shufflevector <2 x i64> %tmp, <2 x i64> poison, <2 x i32> zeroinitializer
+  %gep = getelementptr i32, i32* %a, <2 x i64> %splatof4
+  %res = extractelement <2 x i32*> %gep, i32 0
+  ret i32* %res
+}
+
+define i32* @vector_splat_indices_nxv2i64_ext0(i32* %a) {
+; CHECK-LABEL: @vector_splat_indices_nxv2i64_ext0(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    [[RES:%.*]] = getelementptr inbounds i32, i32* [[A:%.*]], i64 extractelement (<vscale x 2 x i64> shufflevector (<vscale x 2 x i64> insertelement (<vscale x 2 x i64> poison, i64 4, i32 0), <vscale x 2 x i64> poison, <vscale x 2 x i32> zeroinitializer), i32 0)
+; CHECK-NEXT:    ret i32* [[RES]]
+;
+entry:
+  %tmp = insertelement <vscale x 2 x i64> poison, i64 4, i32 0
+  %splatof4 = shufflevector <vscale x 2 x i64> %tmp, <vscale x 2 x i64> poison, <vscale x 2 x i32> zeroinitializer
+  %gep = getelementptr inbounds i32, i32* %a, <vscale x 2 x i64> %splatof4
+  %res = extractelement <vscale x 2 x i32*> %gep, i32 0
+  ret i32* %res
+}
+
+define i32* @vector_indices_v2i64_ext0(i32* %a, <2 x i64> %indices) {
+; CHECK-LABEL: @vector_indices_v2i64_ext0(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    [[TMP0:%.*]] = extractelement <2 x i64> [[INDICES:%.*]], i32 0
+; CHECK-NEXT:    [[RES:%.*]] = getelementptr i32, i32* [[A:%.*]], i64 [[TMP0]]
+; CHECK-NEXT:    ret i32* [[RES]]
+;
+entry:
+  %gep = getelementptr i32, i32* %a, <2 x i64> %indices
+  %res = extractelement <2 x i32*> %gep, i32 0
+  ret i32* %res
+}
+
+define i32* @vector_indices_nxv1i64_ext0(i32* %a, <vscale x 1 x i64> %indices) {
+; CHECK-LABEL: @vector_indices_nxv1i64_ext0(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    [[TMP0:%.*]] = extractelement <vscale x 1 x i64> [[INDICES:%.*]], i32 0
+; CHECK-NEXT:    [[RES:%.*]] = getelementptr i32, i32* [[A:%.*]], i64 [[TMP0]]
+; CHECK-NEXT:    ret i32* [[RES]]
+;
+entry:
+  %gep = getelementptr i32, i32* %a, <vscale x 1 x i64> %indices
+  %res = extractelement <vscale x 1 x i32*> %gep, i32 0
+  ret i32* %res
+}
+
+
+define i32* @vector_splat_ptrs_v2i64_ext0(i32* %a, i64 %index) {
+; CHECK-LABEL: @vector_splat_ptrs_v2i64_ext0(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    [[RES:%.*]] = getelementptr i32, i32* [[A:%.*]], i64 [[INDEX:%.*]]
+; CHECK-NEXT:    ret i32* [[RES]]
+;
+entry:
+  %tmp = insertelement <2 x i32*> poison, i32* %a, i32 0
+  %splatofa = shufflevector <2 x i32*> %tmp, <2 x i32*> poison, <2 x i32> zeroinitializer
+  %gep = getelementptr i32, <2 x i32*> %splatofa, i64 %index
+  %res = extractelement <2 x i32*> %gep, i32 0
+  ret i32* %res
+}
+
+
+define i32* @vector_splat_ptrs_nxv2i64_ext0(i32* %a, i64 %index) {
+; CHECK-LABEL: @vector_splat_ptrs_nxv2i64_ext0(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    [[TMP:%.*]] = insertelement <vscale x 2 x i32*> poison, i32* [[A:%.*]], i32 0
+; CHECK-NEXT:    [[SPLATOFA:%.*]] = shufflevector <vscale x 2 x i32*> [[TMP]], <vscale x 2 x i32*> poison, <vscale x 2 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP0:%.*]] = extractelement <vscale x 2 x i32*> [[SPLATOFA]], i32 0
+; CHECK-NEXT:    [[RES:%.*]] = getelementptr i32, i32* [[TMP0]], i64 [[INDEX:%.*]]
+; CHECK-NEXT:    ret i32* [[RES]]
+;
+entry:
+  %tmp = insertelement <vscale x 2 x i32*> poison, i32* %a, i32 0
+  %splatofa = shufflevector <vscale x 2 x i32*> %tmp, <vscale x 2 x i32*> poison, <vscale x 2 x i32> zeroinitializer
+  %gep = getelementptr i32, <vscale x 2 x i32*> %splatofa, i64 %index
+  %res = extractelement <vscale x 2 x i32*> %gep, i32 0
+  ret i32* %res
+}
+
+
+; Negative tests
+
+define i32* @vector_indices_nxv2i64_ext3(i32* %a, <vscale x 2 x i64> %indices) {
+; CHECK-LABEL: @vector_indices_nxv2i64_ext3(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    [[GEP:%.*]] = getelementptr i32, i32* [[A:%.*]], <vscale x 2 x i64> [[INDICES:%.*]]
+; CHECK-NEXT:    [[RES:%.*]] = extractelement <vscale x 2 x i32*> [[GEP]], i32 3
+; CHECK-NEXT:    ret i32* [[RES]]
+;
+entry:
+  %gep = getelementptr i32, i32* %a, <vscale x 2 x i64> %indices
+  %res = extractelement <vscale x 2 x i32*> %gep, i32 3
+  ret i32* %res
+}
+
+define i32* @vector_ptrs_and_indices_ext0(<vscale x 4 x i32*> %a, <vscale x 4 x i64> %indices) {
+; CHECK-LABEL: @vector_ptrs_and_indices_ext0(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    [[GEP:%.*]] = getelementptr i32, <vscale x 4 x i32*> [[A:%.*]], <vscale x 4 x i64> [[INDICES:%.*]]
+; CHECK-NEXT:    [[RES:%.*]] = extractelement <vscale x 4 x i32*> [[GEP]], i32 0
+; CHECK-NEXT:    ret i32* [[RES]]
+;
+entry:
+  %gep = getelementptr i32, <vscale x 4 x i32*> %a, <vscale x 4 x i64> %indices
+  %res = extractelement <vscale x 4 x i32*> %gep, i32 0
+  ret i32* %res
+}
Index: llvm/test/Transforms/InstCombine/vec_demanded_elts-inseltpoison.ll
===================================================================
--- llvm/test/Transforms/InstCombine/vec_demanded_elts-inseltpoison.ll
+++ llvm/test/Transforms/InstCombine/vec_demanded_elts-inseltpoison.ll
@@ -21,7 +21,7 @@
 define void @get_image() nounwind {
 ; CHECK-LABEL: @get_image(
 ; CHECK-NEXT:  entry:
-; CHECK-NEXT:    [[TMP0:%.*]] = call i32 @fgetc(i8* null) [[ATTR0:#.*]]
+; CHECK-NEXT:    [[TMP0:%.*]] = call i32 @fgetc(i8* null) #[[ATTR0:[0-9]+]]
 ; CHECK-NEXT:    br i1 false, label [[BB2:%.*]], label [[BB3:%.*]]
 ; CHECK:       bb2:
 ; CHECK-NEXT:    br label [[BB3]]
@@ -504,8 +504,8 @@
 
 define i32* @gep_vbase_w_s_idx(<2 x i32*> %base) {
 ; CHECK-LABEL: @gep_vbase_w_s_idx(
-; CHECK-NEXT:    [[GEP:%.*]] = getelementptr i32, <2 x i32*> [[BASE:%.*]], i64 1
-; CHECK-NEXT:    [[EE:%.*]] = extractelement <2 x i32*> [[GEP]], i32 1
+; CHECK-NEXT:    [[TMP1:%.*]] = extractelement <2 x i32*> [[BASE:%.*]], i32 1
+; CHECK-NEXT:    [[EE:%.*]] = getelementptr i32, i32* [[TMP1]], i64 1
 ; CHECK-NEXT:    ret i32* [[EE]]
 ;
   %gep = getelementptr i32, <2 x i32*> %base, i64 1
@@ -515,9 +515,7 @@
 
 define i32* @gep_splat_base_w_s_idx(i32* %base) {
 ; CHECK-LABEL: @gep_splat_base_w_s_idx(
-; CHECK-NEXT:    [[BASEVEC2:%.*]] = insertelement <2 x i32*> poison, i32* [[BASE:%.*]], i32 1
-; CHECK-NEXT:    [[GEP:%.*]] = getelementptr i32, <2 x i32*> [[BASEVEC2]], i64 1
-; CHECK-NEXT:    [[EE:%.*]] = extractelement <2 x i32*> [[GEP]], i32 1
+; CHECK-NEXT:    [[EE:%.*]] = getelementptr i32, i32* [[BASE:%.*]], i64 1
 ; CHECK-NEXT:    ret i32* [[EE]]
 ;
   %basevec1 = insertelement <2 x i32*> poison, i32* %base, i32 0
@@ -561,8 +559,7 @@
 
 define i32* @gep_cvbase_w_s_idx(<2 x i32*> %base, i64 %raw_addr) {
 ; CHECK-LABEL: @gep_cvbase_w_s_idx(
-; CHECK-NEXT:    [[GEP:%.*]] = getelementptr i32, <2 x i32*> <i32* poison, i32* @GLOBAL>, i64 [[RAW_ADDR:%.*]]
-; CHECK-NEXT:    [[EE:%.*]] = extractelement <2 x i32*> [[GEP]], i32 1
+; CHECK-NEXT:    [[EE:%.*]] = getelementptr i32, i32* @GLOBAL, i64 [[RAW_ADDR:%.*]]
 ; CHECK-NEXT:    ret i32* [[EE]]
 ;
   %gep = getelementptr i32, <2 x i32*> <i32* @GLOBAL, i32* @GLOBAL>, i64 %raw_addr
@@ -582,8 +579,7 @@
 
 define i32* @gep_sbase_w_cv_idx(i32* %base) {
 ; CHECK-LABEL: @gep_sbase_w_cv_idx(
-; CHECK-NEXT:    [[GEP:%.*]] = getelementptr i32, i32* [[BASE:%.*]], <2 x i64> <i64 poison, i64 1>
-; CHECK-NEXT:    [[EE:%.*]] = extractelement <2 x i32*> [[GEP]], i32 1
+; CHECK-NEXT:    [[EE:%.*]] = getelementptr i32, i32* [[BASE:%.*]], i64 1
 ; CHECK-NEXT:    ret i32* [[EE]]
 ;
   %gep = getelementptr i32, i32* %base, <2 x i64> <i64 0, i64 1>
@@ -593,9 +589,7 @@
 
 define i32* @gep_sbase_w_splat_idx(i32* %base, i64 %idx) {
 ; CHECK-LABEL: @gep_sbase_w_splat_idx(
-; CHECK-NEXT:    [[IDXVEC2:%.*]] = insertelement <2 x i64> poison, i64 [[IDX:%.*]], i32 1
-; CHECK-NEXT:    [[GEP:%.*]] = getelementptr i32, i32* [[BASE:%.*]], <2 x i64> [[IDXVEC2]]
-; CHECK-NEXT:    [[EE:%.*]] = extractelement <2 x i32*> [[GEP]], i32 1
+; CHECK-NEXT:    [[EE:%.*]] = getelementptr i32, i32* [[BASE:%.*]], i64 [[IDX:%.*]]
 ; CHECK-NEXT:    ret i32* [[EE]]
 ;
   %idxvec1 = insertelement <2 x i64> poison, i64 %idx, i32 0
Index: llvm/test/Transforms/InstCombine/vec_demanded_elts.ll
===================================================================
--- llvm/test/Transforms/InstCombine/vec_demanded_elts.ll
+++ llvm/test/Transforms/InstCombine/vec_demanded_elts.ll
@@ -21,7 +21,7 @@
 define void @get_image() nounwind {
 ; CHECK-LABEL: @get_image(
 ; CHECK-NEXT:  entry:
-; CHECK-NEXT:    [[TMP0:%.*]] = call i32 @fgetc(i8* null) [[ATTR0:#.*]]
+; CHECK-NEXT:    [[TMP0:%.*]] = call i32 @fgetc(i8* null) #[[ATTR0:[0-9]+]]
 ; CHECK-NEXT:    br i1 false, label [[BB2:%.*]], label [[BB3:%.*]]
 ; CHECK:       bb2:
 ; CHECK-NEXT:    br label [[BB3]]
@@ -504,8 +504,8 @@
 
 define i32* @gep_vbase_w_s_idx(<2 x i32*> %base) {
 ; CHECK-LABEL: @gep_vbase_w_s_idx(
-; CHECK-NEXT:    [[GEP:%.*]] = getelementptr i32, <2 x i32*> [[BASE:%.*]], i64 1
-; CHECK-NEXT:    [[EE:%.*]] = extractelement <2 x i32*> [[GEP]], i32 1
+; CHECK-NEXT:    [[TMP1:%.*]] = extractelement <2 x i32*> [[BASE:%.*]], i32 1
+; CHECK-NEXT:    [[EE:%.*]] = getelementptr i32, i32* [[TMP1]], i64 1
 ; CHECK-NEXT:    ret i32* [[EE]]
 ;
   %gep = getelementptr i32, <2 x i32*> %base, i64 1
@@ -515,9 +515,7 @@
 
 define i32* @gep_splat_base_w_s_idx(i32* %base) {
 ; CHECK-LABEL: @gep_splat_base_w_s_idx(
-; CHECK-NEXT:    [[BASEVEC2:%.*]] = insertelement <2 x i32*> undef, i32* [[BASE:%.*]], i32 1
-; CHECK-NEXT:    [[GEP:%.*]] = getelementptr i32, <2 x i32*> [[BASEVEC2]], i64 1
-; CHECK-NEXT:    [[EE:%.*]] = extractelement <2 x i32*> [[GEP]], i32 1
+; CHECK-NEXT:    [[EE:%.*]] = getelementptr i32, i32* [[BASE:%.*]], i64 1
 ; CHECK-NEXT:    ret i32* [[EE]]
 ;
   %basevec1 = insertelement <2 x i32*> undef, i32* %base, i32 0
@@ -561,8 +559,7 @@
 
 define i32* @gep_cvbase_w_s_idx(<2 x i32*> %base, i64 %raw_addr) {
 ; CHECK-LABEL: @gep_cvbase_w_s_idx(
-; CHECK-NEXT:    [[GEP:%.*]] = getelementptr i32, <2 x i32*> <i32* poison, i32* @GLOBAL>, i64 [[RAW_ADDR:%.*]]
-; CHECK-NEXT:    [[EE:%.*]] = extractelement <2 x i32*> [[GEP]], i32 1
+; CHECK-NEXT:    [[EE:%.*]] = getelementptr i32, i32* @GLOBAL, i64 [[RAW_ADDR:%.*]]
 ; CHECK-NEXT:    ret i32* [[EE]]
 ;
   %gep = getelementptr i32, <2 x i32*> <i32* @GLOBAL, i32* @GLOBAL>, i64 %raw_addr
@@ -582,8 +579,7 @@
 
 define i32* @gep_sbase_w_cv_idx(i32* %base) {
 ; CHECK-LABEL: @gep_sbase_w_cv_idx(
-; CHECK-NEXT:    [[GEP:%.*]] = getelementptr i32, i32* [[BASE:%.*]], <2 x i64> <i64 poison, i64 1>
-; CHECK-NEXT:    [[EE:%.*]] = extractelement <2 x i32*> [[GEP]], i32 1
+; CHECK-NEXT:    [[EE:%.*]] = getelementptr i32, i32* [[BASE:%.*]], i64 1
 ; CHECK-NEXT:    ret i32* [[EE]]
 ;
   %gep = getelementptr i32, i32* %base, <2 x i64> <i64 0, i64 1>
@@ -593,9 +589,7 @@
 
 define i32* @gep_sbase_w_splat_idx(i32* %base, i64 %idx) {
 ; CHECK-LABEL: @gep_sbase_w_splat_idx(
-; CHECK-NEXT:    [[IDXVEC2:%.*]] = insertelement <2 x i64> undef, i64 [[IDX:%.*]], i32 1
-; CHECK-NEXT:    [[GEP:%.*]] = getelementptr i32, i32* [[BASE:%.*]], <2 x i64> [[IDXVEC2]]
-; CHECK-NEXT:    [[EE:%.*]] = extractelement <2 x i32*> [[GEP]], i32 1
+; CHECK-NEXT:    [[EE:%.*]] = getelementptr i32, i32* [[BASE:%.*]], i64 [[IDX:%.*]]
 ; CHECK-NEXT:    ret i32* [[EE]]
 ;
   %idxvec1 = insertelement <2 x i64> undef, i64 %idx, i32 0