From a15144f2baed59bd72df6c35f7cbe5547b84a008 Mon Sep 17 00:00:00 2001
From: Vladislav Dzhidzhoev <vdzhidzhoev@accesssoftek.com>
Date: Mon, 28 Aug 2023 19:41:35 +0200
Subject: [PATCH] [AArch64][GlobalISel] Lower G_EXTRACT_VECTOR_ELT with
 variable indices

G_EXTRACT_VECTOR_ELT instructions with non-constant indices are not
selected, so they need to be lowered.

Fixes https://github.com/llvm/llvm-project/issues/65049.

Reviewed By: Peter

Differential Revision: https://reviews.llvm.org/D159096
---
 .../AArch64/GISel/AArch64LegalizerInfo.cpp    |  18 +-
 .../AArch64/GISel/AArch64LegalizerInfo.h      |   2 +
 .../legalize-extract-vector-elt.mir           | 281 +++++++++++++-
 .../AArch64/arm64-extract-insert-varidx.ll    | 365 ++++++++++++++++++
 4 files changed, 643 insertions(+), 23 deletions(-)
 create mode 100644 llvm/test/CodeGen/AArch64/arm64-extract-insert-varidx.ll

diff --git a/llvm/lib/Target/AArch64/GISel/AArch64LegalizerInfo.cpp b/llvm/lib/Target/AArch64/GISel/AArch64LegalizerInfo.cpp
index 17b5490a914b27..e2df8fb1321df8 100644
--- a/llvm/lib/Target/AArch64/GISel/AArch64LegalizerInfo.cpp
+++ b/llvm/lib/Target/AArch64/GISel/AArch64LegalizerInfo.cpp
@@ -696,12 +696,11 @@ AArch64LegalizerInfo::AArch64LegalizerInfo(const AArch64Subtarget &ST)
         return Query.Types[0] != EltTy;
       })
       .minScalar(2, s64)
-      .legalIf([=](const LegalityQuery &Query) {
+      .customIf([=](const LegalityQuery &Query) {
         const LLT &VecTy = Query.Types[1];
         return VecTy == v2s16 || VecTy == v4s16 || VecTy == v8s16 ||
                VecTy == v4s32 || VecTy == v2s64 || VecTy == v2s32 ||
-               VecTy == v8s8 || VecTy == v16s8 || VecTy == v2s32 ||
-               VecTy == v2p0;
+               VecTy == v8s8 || VecTy == v16s8 || VecTy == v2p0;
       })
       .minScalarOrEltIf(
           [=](const LegalityQuery &Query) {
@@ -1022,6 +1021,8 @@ bool AArch64LegalizerInfo::legalizeCustom(LegalizerHelper &Helper,
     return legalizeMemOps(MI, Helper);
   case TargetOpcode::G_FCOPYSIGN:
     return legalizeFCopySign(MI, Helper);
+  case TargetOpcode::G_EXTRACT_VECTOR_ELT:
+    return legalizeExtractVectorElt(MI, MRI, Helper);
   }
 
   llvm_unreachable("expected switch to return");
@@ -1801,3 +1802,14 @@ bool AArch64LegalizerInfo::legalizeFCopySign(MachineInstr &MI,
   MI.eraseFromParent();
   return true;
 }
+
+bool AArch64LegalizerInfo::legalizeExtractVectorElt(
+    MachineInstr &MI, MachineRegisterInfo &MRI, LegalizerHelper &Helper) const {
+  assert(MI.getOpcode() == TargetOpcode::G_EXTRACT_VECTOR_ELT);
+  auto VRegAndVal =
+      getIConstantVRegValWithLookThrough(MI.getOperand(2).getReg(), MRI);
+  if (VRegAndVal)
+    return true;
+  return Helper.lowerExtractInsertVectorElt(MI) !=
+         LegalizerHelper::LegalizeResult::UnableToLegalize;
+}
diff --git a/llvm/lib/Target/AArch64/GISel/AArch64LegalizerInfo.h b/llvm/lib/Target/AArch64/GISel/AArch64LegalizerInfo.h
index 13a68b83c54ee1..853d5a2305ac68 100644
--- a/llvm/lib/Target/AArch64/GISel/AArch64LegalizerInfo.h
+++ b/llvm/lib/Target/AArch64/GISel/AArch64LegalizerInfo.h
@@ -62,6 +62,8 @@ class AArch64LegalizerInfo : public LegalizerInfo {
   bool legalizeCTTZ(MachineInstr &MI, LegalizerHelper &Helper) const;
   bool legalizeMemOps(MachineInstr &MI, LegalizerHelper &Helper) const;
   bool legalizeFCopySign(MachineInstr &MI, LegalizerHelper &Helper) const;
+  bool legalizeExtractVectorElt(MachineInstr &MI, MachineRegisterInfo &MRI,
+                                LegalizerHelper &Helper) const;
   const AArch64Subtarget *ST;
 };
 } // End llvm namespace.
diff --git a/llvm/test/CodeGen/AArch64/GlobalISel/legalize-extract-vector-elt.mir b/llvm/test/CodeGen/AArch64/GlobalISel/legalize-extract-vector-elt.mir
index 22c2a479363762..2209287284b711 100644
--- a/llvm/test/CodeGen/AArch64/GlobalISel/legalize-extract-vector-elt.mir
+++ b/llvm/test/CodeGen/AArch64/GlobalISel/legalize-extract-vector-elt.mir
@@ -22,18 +22,18 @@ body: |
 name:            test_eve_v2s1
 body: |
   bb.0:
-    liveins: $q0, $q1, $x0
+    liveins: $q0, $q1
     ; CHECK-LABEL: name: test_eve_v2s1
     ; CHECK: [[COPY:%[0-9]+]]:_(<2 x s64>) = COPY $q0
     ; CHECK-NEXT: [[COPY1:%[0-9]+]]:_(<2 x s64>) = COPY $q1
-    ; CHECK-NEXT: [[COPY2:%[0-9]+]]:_(s64) = COPY $x0
+    ; CHECK-NEXT: [[C:%[0-9]+]]:_(s64) = G_CONSTANT i64 1
     ; CHECK-NEXT: [[ICMP:%[0-9]+]]:_(<2 x s64>) = G_ICMP intpred(eq), [[COPY]](<2 x s64>), [[COPY1]]
-    ; CHECK-NEXT: [[EVEC:%[0-9]+]]:_(s64) = G_EXTRACT_VECTOR_ELT [[ICMP]](<2 x s64>), [[COPY2]](s64)
+    ; CHECK-NEXT: [[EVEC:%[0-9]+]]:_(s64) = G_EXTRACT_VECTOR_ELT [[ICMP]](<2 x s64>), [[C]](s64)
     ; CHECK-NEXT: $x0 = COPY [[EVEC]](s64)
     ; CHECK-NEXT: RET_ReallyLR
     %0:_(<2 x s64>) = COPY $q0
     %1:_(<2 x s64>) = COPY $q1
-    %2:_(s64) = COPY $x0
+    %2:_(s64) = G_CONSTANT i64 1
     %3:_(<2 x s1>) = G_ICMP intpred(eq), %0(<2 x s64>), %1
     %4:_(s1) = G_EXTRACT_VECTOR_ELT %3:_(<2 x s1>), %2:_(s64)
     %5:_(s64) = G_ANYEXT %4(s1)
@@ -44,19 +44,19 @@ body: |
 name:            test_eve_v4s1
 body: |
   bb.0:
-    liveins: $q0, $q1, $x0
+    liveins: $q0, $q1
     ; CHECK-LABEL: name: test_eve_v4s1
     ; CHECK: [[COPY:%[0-9]+]]:_(<4 x s32>) = COPY $q0
     ; CHECK-NEXT: [[COPY1:%[0-9]+]]:_(<4 x s32>) = COPY $q1
-    ; CHECK-NEXT: [[COPY2:%[0-9]+]]:_(s64) = COPY $x0
+    ; CHECK-NEXT: [[C:%[0-9]+]]:_(s64) = G_CONSTANT i64 1
     ; CHECK-NEXT: [[ICMP:%[0-9]+]]:_(<4 x s32>) = G_ICMP intpred(eq), [[COPY]](<4 x s32>), [[COPY1]]
-    ; CHECK-NEXT: [[EVEC:%[0-9]+]]:_(s32) = G_EXTRACT_VECTOR_ELT [[ICMP]](<4 x s32>), [[COPY2]](s64)
+    ; CHECK-NEXT: [[EVEC:%[0-9]+]]:_(s32) = G_EXTRACT_VECTOR_ELT [[ICMP]](<4 x s32>), [[C]](s64)
     ; CHECK-NEXT: [[ANYEXT:%[0-9]+]]:_(s64) = G_ANYEXT [[EVEC]](s32)
     ; CHECK-NEXT: $x0 = COPY [[ANYEXT]](s64)
     ; CHECK-NEXT: RET_ReallyLR
     %0:_(<4 x s32>) = COPY $q0
     %1:_(<4 x s32>) = COPY $q1
-    %2:_(s64) = COPY $x0
+    %2:_(s64) = G_CONSTANT i64 1
     %3:_(<4 x s1>) = G_ICMP intpred(eq), %0(<4 x s32>), %1
     %4:_(s1) = G_EXTRACT_VECTOR_ELT %3:_(<4 x s1>), %2:_(s64)
     %5:_(s64) = G_ANYEXT %4(s1)
@@ -67,19 +67,19 @@ body: |
 name:            test_eve_v8s1
 body: |
   bb.0:
-    liveins: $q0, $q1, $x0
+    liveins: $q0, $q1
     ; CHECK-LABEL: name: test_eve_v8s1
     ; CHECK: [[COPY:%[0-9]+]]:_(<8 x s16>) = COPY $q0
     ; CHECK-NEXT: [[COPY1:%[0-9]+]]:_(<8 x s16>) = COPY $q1
-    ; CHECK-NEXT: [[COPY2:%[0-9]+]]:_(s64) = COPY $x0
+    ; CHECK-NEXT: [[C:%[0-9]+]]:_(s64) = G_CONSTANT i64 1
     ; CHECK-NEXT: [[ICMP:%[0-9]+]]:_(<8 x s16>) = G_ICMP intpred(eq), [[COPY]](<8 x s16>), [[COPY1]]
-    ; CHECK-NEXT: [[EVEC:%[0-9]+]]:_(s16) = G_EXTRACT_VECTOR_ELT [[ICMP]](<8 x s16>), [[COPY2]](s64)
+    ; CHECK-NEXT: [[EVEC:%[0-9]+]]:_(s16) = G_EXTRACT_VECTOR_ELT [[ICMP]](<8 x s16>), [[C]](s64)
     ; CHECK-NEXT: [[ANYEXT:%[0-9]+]]:_(s64) = G_ANYEXT [[EVEC]](s16)
     ; CHECK-NEXT: $x0 = COPY [[ANYEXT]](s64)
     ; CHECK-NEXT: RET_ReallyLR
     %0:_(<8 x s16>) = COPY $q0
     %1:_(<8 x s16>) = COPY $q1
-    %2:_(s64) = COPY $x0
+    %2:_(s64) = G_CONSTANT i64 1
     %3:_(<8 x s1>) = G_ICMP intpred(eq), %0(<8 x s16>), %1
     %4:_(s1) = G_EXTRACT_VECTOR_ELT %3:_(<8 x s1>), %2:_(s64)
     %5:_(s64) = G_ANYEXT %4(s1)
@@ -90,19 +90,19 @@ body: |
 name:            test_eve_v16s1
 body: |
   bb.0:
-    liveins: $q0, $q1, $x0
+    liveins: $q0, $q1
     ; CHECK-LABEL: name: test_eve_v16s1
     ; CHECK: [[COPY:%[0-9]+]]:_(<16 x s8>) = COPY $q0
     ; CHECK-NEXT: [[COPY1:%[0-9]+]]:_(<16 x s8>) = COPY $q1
-    ; CHECK-NEXT: [[COPY2:%[0-9]+]]:_(s64) = COPY $x0
+    ; CHECK-NEXT: [[C:%[0-9]+]]:_(s64) = G_CONSTANT i64 1
     ; CHECK-NEXT: [[ICMP:%[0-9]+]]:_(<16 x s8>) = G_ICMP intpred(eq), [[COPY]](<16 x s8>), [[COPY1]]
-    ; CHECK-NEXT: [[EVEC:%[0-9]+]]:_(s8) = G_EXTRACT_VECTOR_ELT [[ICMP]](<16 x s8>), [[COPY2]](s64)
+    ; CHECK-NEXT: [[EVEC:%[0-9]+]]:_(s8) = G_EXTRACT_VECTOR_ELT [[ICMP]](<16 x s8>), [[C]](s64)
     ; CHECK-NEXT: [[ANYEXT:%[0-9]+]]:_(s64) = G_ANYEXT [[EVEC]](s8)
     ; CHECK-NEXT: $x0 = COPY [[ANYEXT]](s64)
     ; CHECK-NEXT: RET_ReallyLR
     %0:_(<16 x s8>) = COPY $q0
     %1:_(<16 x s8>) = COPY $q1
-    %2:_(s64) = COPY $x0
+    %2:_(s64) = G_CONSTANT i64 1
     %3:_(<16 x s1>) = G_ICMP intpred(eq), %0(<16 x s8>), %1
     %4:_(s1) = G_EXTRACT_VECTOR_ELT %3:_(<16 x s1>), %2:_(s64)
     %5:_(s64) = G_ANYEXT %4(s1)
@@ -113,15 +113,15 @@ body: |
 name:            test_eve_v2p0
 body: |
   bb.0:
-    liveins: $q0, $q1, $x0
+    liveins: $q0, $q1
     ; CHECK-LABEL: name: test_eve_v2p0
     ; CHECK: [[COPY:%[0-9]+]]:_(<2 x p0>) = COPY $q0
-    ; CHECK-NEXT: [[COPY1:%[0-9]+]]:_(s64) = COPY $x0
-    ; CHECK-NEXT: [[EVEC:%[0-9]+]]:_(p0) = G_EXTRACT_VECTOR_ELT [[COPY]](<2 x p0>), [[COPY1]](s64)
+    ; CHECK-NEXT: [[C:%[0-9]+]]:_(s64) = G_CONSTANT i64 1
+    ; CHECK-NEXT: [[EVEC:%[0-9]+]]:_(p0) = G_EXTRACT_VECTOR_ELT [[COPY]](<2 x p0>), [[C]](s64)
     ; CHECK-NEXT: $x0 = COPY [[EVEC]](p0)
     ; CHECK-NEXT: RET_ReallyLR
     %0:_(<2 x p0>) = COPY $q0
-    %2:_(s64) = COPY $x0
+    %2:_(s64) = G_CONSTANT i64 1
     %3:_(p0) = G_EXTRACT_VECTOR_ELT %0:_(<2 x p0>), %2:_(s64)
     $x0 = COPY %3(p0)
     RET_ReallyLR
@@ -147,6 +147,150 @@ body: |
     RET_ReallyLR
 ...
 ---
+name:            test_eve_v2s1_unknown_idx
+body: |
+  bb.0:
+    liveins: $q0, $q1, $x0
+    ; CHECK-LABEL: name: test_eve_v2s1_unknown_idx
+    ; CHECK: [[COPY:%[0-9]+]]:_(<2 x s64>) = COPY $q0
+    ; CHECK-NEXT: [[COPY1:%[0-9]+]]:_(<2 x s64>) = COPY $q1
+    ; CHECK-NEXT: [[COPY2:%[0-9]+]]:_(s64) = COPY $x0
+    ; CHECK-NEXT: [[ICMP:%[0-9]+]]:_(<2 x s64>) = G_ICMP intpred(eq), [[COPY]](<2 x s64>), [[COPY1]]
+    ; CHECK-NEXT: [[FRAME_INDEX:%[0-9]+]]:_(p0) = G_FRAME_INDEX %stack.0
+    ; CHECK-NEXT: G_STORE [[ICMP]](<2 x s64>), [[FRAME_INDEX]](p0) :: (store (<2 x s64>) into %stack.0)
+    ; CHECK-NEXT: [[C:%[0-9]+]]:_(s64) = G_CONSTANT i64 1
+    ; CHECK-NEXT: [[AND:%[0-9]+]]:_(s64) = G_AND [[COPY2]], [[C]]
+    ; CHECK-NEXT: [[C1:%[0-9]+]]:_(s64) = G_CONSTANT i64 8
+    ; CHECK-NEXT: [[MUL:%[0-9]+]]:_(s64) = G_MUL [[AND]], [[C1]]
+    ; CHECK-NEXT: [[PTR_ADD:%[0-9]+]]:_(p0) = G_PTR_ADD [[FRAME_INDEX]], [[MUL]](s64)
+    ; CHECK-NEXT: [[LOAD:%[0-9]+]]:_(s64) = G_LOAD [[PTR_ADD]](p0) :: (load (s64))
+    ; CHECK-NEXT: $x0 = COPY [[LOAD]](s64)
+    ; CHECK-NEXT: RET_ReallyLR
+    %0:_(<2 x s64>) = COPY $q0
+    %1:_(<2 x s64>) = COPY $q1
+    %2:_(s64) = COPY $x0
+    %3:_(<2 x s1>) = G_ICMP intpred(eq), %0(<2 x s64>), %1
+    %4:_(s1) = G_EXTRACT_VECTOR_ELT %3:_(<2 x s1>), %2:_(s64)
+    %5:_(s64) = G_ANYEXT %4(s1)
+    $x0 = COPY %5(s64)
+    RET_ReallyLR
+...
+---
+name:            test_eve_v4s1_unknown_idx
+body: |
+  bb.0:
+    liveins: $q0, $q1, $x0
+    ; CHECK-LABEL: name: test_eve_v4s1_unknown_idx
+    ; CHECK: [[COPY:%[0-9]+]]:_(<4 x s32>) = COPY $q0
+    ; CHECK-NEXT: [[COPY1:%[0-9]+]]:_(<4 x s32>) = COPY $q1
+    ; CHECK-NEXT: [[COPY2:%[0-9]+]]:_(s64) = COPY $x0
+    ; CHECK-NEXT: [[ICMP:%[0-9]+]]:_(<4 x s32>) = G_ICMP intpred(eq), [[COPY]](<4 x s32>), [[COPY1]]
+    ; CHECK-NEXT: [[FRAME_INDEX:%[0-9]+]]:_(p0) = G_FRAME_INDEX %stack.0
+    ; CHECK-NEXT: G_STORE [[ICMP]](<4 x s32>), [[FRAME_INDEX]](p0) :: (store (<4 x s32>) into %stack.0)
+    ; CHECK-NEXT: [[C:%[0-9]+]]:_(s64) = G_CONSTANT i64 3
+    ; CHECK-NEXT: [[AND:%[0-9]+]]:_(s64) = G_AND [[COPY2]], [[C]]
+    ; CHECK-NEXT: [[C1:%[0-9]+]]:_(s64) = G_CONSTANT i64 4
+    ; CHECK-NEXT: [[MUL:%[0-9]+]]:_(s64) = G_MUL [[AND]], [[C1]]
+    ; CHECK-NEXT: [[PTR_ADD:%[0-9]+]]:_(p0) = G_PTR_ADD [[FRAME_INDEX]], [[MUL]](s64)
+    ; CHECK-NEXT: [[LOAD:%[0-9]+]]:_(s32) = G_LOAD [[PTR_ADD]](p0) :: (load (s32))
+    ; CHECK-NEXT: [[ANYEXT:%[0-9]+]]:_(s64) = G_ANYEXT [[LOAD]](s32)
+    ; CHECK-NEXT: $x0 = COPY [[ANYEXT]](s64)
+    ; CHECK-NEXT: RET_ReallyLR
+    %0:_(<4 x s32>) = COPY $q0
+    %1:_(<4 x s32>) = COPY $q1
+    %2:_(s64) = COPY $x0
+    %3:_(<4 x s1>) = G_ICMP intpred(eq), %0(<4 x s32>), %1
+    %4:_(s1) = G_EXTRACT_VECTOR_ELT %3:_(<4 x s1>), %2:_(s64)
+    %5:_(s64) = G_ANYEXT %4(s1)
+    $x0 = COPY %5(s64)
+    RET_ReallyLR
+...
+---
+name:            test_eve_v8s1_unknown_idx
+body: |
+  bb.0:
+    liveins: $q0, $q1, $x0
+    ; CHECK-LABEL: name: test_eve_v8s1_unknown_idx
+    ; CHECK: [[COPY:%[0-9]+]]:_(<8 x s16>) = COPY $q0
+    ; CHECK-NEXT: [[COPY1:%[0-9]+]]:_(<8 x s16>) = COPY $q1
+    ; CHECK-NEXT: [[COPY2:%[0-9]+]]:_(s64) = COPY $x0
+    ; CHECK-NEXT: [[ICMP:%[0-9]+]]:_(<8 x s16>) = G_ICMP intpred(eq), [[COPY]](<8 x s16>), [[COPY1]]
+    ; CHECK-NEXT: [[FRAME_INDEX:%[0-9]+]]:_(p0) = G_FRAME_INDEX %stack.0
+    ; CHECK-NEXT: G_STORE [[ICMP]](<8 x s16>), [[FRAME_INDEX]](p0) :: (store (<8 x s16>) into %stack.0)
+    ; CHECK-NEXT: [[C:%[0-9]+]]:_(s64) = G_CONSTANT i64 7
+    ; CHECK-NEXT: [[AND:%[0-9]+]]:_(s64) = G_AND [[COPY2]], [[C]]
+    ; CHECK-NEXT: [[C1:%[0-9]+]]:_(s64) = G_CONSTANT i64 2
+    ; CHECK-NEXT: [[MUL:%[0-9]+]]:_(s64) = G_MUL [[AND]], [[C1]]
+    ; CHECK-NEXT: [[PTR_ADD:%[0-9]+]]:_(p0) = G_PTR_ADD [[FRAME_INDEX]], [[MUL]](s64)
+    ; CHECK-NEXT: [[LOAD:%[0-9]+]]:_(s16) = G_LOAD [[PTR_ADD]](p0) :: (load (s16))
+    ; CHECK-NEXT: [[ANYEXT:%[0-9]+]]:_(s64) = G_ANYEXT [[LOAD]](s16)
+    ; CHECK-NEXT: $x0 = COPY [[ANYEXT]](s64)
+    ; CHECK-NEXT: RET_ReallyLR
+    %0:_(<8 x s16>) = COPY $q0
+    %1:_(<8 x s16>) = COPY $q1
+    %2:_(s64) = COPY $x0
+    %3:_(<8 x s1>) = G_ICMP intpred(eq), %0(<8 x s16>), %1
+    %4:_(s1) = G_EXTRACT_VECTOR_ELT %3:_(<8 x s1>), %2:_(s64)
+    %5:_(s64) = G_ANYEXT %4(s1)
+    $x0 = COPY %5(s64)
+    RET_ReallyLR
+...
+---
+name:            test_eve_v16s1_unknown_idx
+body: |
+  bb.0:
+    liveins: $q0, $q1, $x0
+    ; CHECK-LABEL: name: test_eve_v16s1_unknown_idx
+    ; CHECK: [[COPY:%[0-9]+]]:_(<16 x s8>) = COPY $q0
+    ; CHECK-NEXT: [[COPY1:%[0-9]+]]:_(<16 x s8>) = COPY $q1
+    ; CHECK-NEXT: [[COPY2:%[0-9]+]]:_(s64) = COPY $x0
+    ; CHECK-NEXT: [[ICMP:%[0-9]+]]:_(<16 x s8>) = G_ICMP intpred(eq), [[COPY]](<16 x s8>), [[COPY1]]
+    ; CHECK-NEXT: [[FRAME_INDEX:%[0-9]+]]:_(p0) = G_FRAME_INDEX %stack.0
+    ; CHECK-NEXT: G_STORE [[ICMP]](<16 x s8>), [[FRAME_INDEX]](p0) :: (store (<16 x s8>) into %stack.0)
+    ; CHECK-NEXT: [[C:%[0-9]+]]:_(s64) = G_CONSTANT i64 15
+    ; CHECK-NEXT: [[AND:%[0-9]+]]:_(s64) = G_AND [[COPY2]], [[C]]
+    ; CHECK-NEXT: [[C1:%[0-9]+]]:_(s64) = G_CONSTANT i64 1
+    ; CHECK-NEXT: [[MUL:%[0-9]+]]:_(s64) = G_MUL [[AND]], [[C1]]
+    ; CHECK-NEXT: [[PTR_ADD:%[0-9]+]]:_(p0) = G_PTR_ADD [[FRAME_INDEX]], [[MUL]](s64)
+    ; CHECK-NEXT: [[LOAD:%[0-9]+]]:_(s8) = G_LOAD [[PTR_ADD]](p0) :: (load (s8))
+    ; CHECK-NEXT: [[ANYEXT:%[0-9]+]]:_(s64) = G_ANYEXT [[LOAD]](s8)
+    ; CHECK-NEXT: $x0 = COPY [[ANYEXT]](s64)
+    ; CHECK-NEXT: RET_ReallyLR
+    %0:_(<16 x s8>) = COPY $q0
+    %1:_(<16 x s8>) = COPY $q1
+    %2:_(s64) = COPY $x0
+    %3:_(<16 x s1>) = G_ICMP intpred(eq), %0(<16 x s8>), %1
+    %4:_(s1) = G_EXTRACT_VECTOR_ELT %3:_(<16 x s1>), %2:_(s64)
+    %5:_(s64) = G_ANYEXT %4(s1)
+    $x0 = COPY %5(s64)
+    RET_ReallyLR
+...
+---
+name:            test_eve_v2p0_unknown_idx
+body: |
+  bb.0:
+    liveins: $q0, $q1, $x0
+    ; CHECK-LABEL: name: test_eve_v2p0_unknown_idx
+    ; CHECK: [[COPY:%[0-9]+]]:_(<2 x p0>) = COPY $q0
+    ; CHECK-NEXT: [[COPY1:%[0-9]+]]:_(s64) = COPY $x0
+    ; CHECK-NEXT: [[FRAME_INDEX:%[0-9]+]]:_(p0) = G_FRAME_INDEX %stack.0
+    ; CHECK-NEXT: [[BITCAST:%[0-9]+]]:_(<2 x s64>) = G_BITCAST [[COPY]](<2 x p0>)
+    ; CHECK-NEXT: G_STORE [[BITCAST]](<2 x s64>), [[FRAME_INDEX]](p0) :: (store (<2 x s64>) into %stack.0)
+    ; CHECK-NEXT: [[C:%[0-9]+]]:_(s64) = G_CONSTANT i64 1
+    ; CHECK-NEXT: [[AND:%[0-9]+]]:_(s64) = G_AND [[COPY1]], [[C]]
+    ; CHECK-NEXT: [[C1:%[0-9]+]]:_(s64) = G_CONSTANT i64 8
+    ; CHECK-NEXT: [[MUL:%[0-9]+]]:_(s64) = G_MUL [[AND]], [[C1]]
+    ; CHECK-NEXT: [[PTR_ADD:%[0-9]+]]:_(p0) = G_PTR_ADD [[FRAME_INDEX]], [[MUL]](s64)
+    ; CHECK-NEXT: [[LOAD:%[0-9]+]]:_(p0) = G_LOAD [[PTR_ADD]](p0) :: (load (p0))
+    ; CHECK-NEXT: $x0 = COPY [[LOAD]](p0)
+    ; CHECK-NEXT: RET_ReallyLR
+    %0:_(<2 x p0>) = COPY $q0
+    %2:_(s64) = COPY $x0
+    %3:_(p0) = G_EXTRACT_VECTOR_ELT %0:_(<2 x p0>), %2:_(s64)
+    $x0 = COPY %3(p0)
+    RET_ReallyLR
+...
+---
 name:            test_eve_v4s64_unknown_idx
 body: |
   bb.0:
@@ -237,6 +381,103 @@ body: |
     RET_ReallyLR
 ...
 ---
+name:            test_eve_v8s32_unknown_idx
+body: |
+  bb.0:
+    liveins: $q0, $q1, $w0
+    ; CHECK-LABEL: name: test_eve_v8s32_unknown_idx
+    ; CHECK: [[COPY:%[0-9]+]]:_(<4 x s32>) = COPY $q0
+    ; CHECK-NEXT: [[COPY1:%[0-9]+]]:_(<4 x s32>) = COPY $q1
+    ; CHECK-NEXT: %idx:_(s32) = COPY $w0
+    ; CHECK-NEXT: %idxprom:_(s64) = G_SEXT %idx(s32)
+    ; CHECK-NEXT: [[FRAME_INDEX:%[0-9]+]]:_(p0) = G_FRAME_INDEX %stack.0
+    ; CHECK-NEXT: G_STORE [[COPY]](<4 x s32>), [[FRAME_INDEX]](p0) :: (store (<4 x s32>) into %stack.0, align 32)
+    ; CHECK-NEXT: [[C:%[0-9]+]]:_(s64) = G_CONSTANT i64 16
+    ; CHECK-NEXT: [[PTR_ADD:%[0-9]+]]:_(p0) = G_PTR_ADD [[FRAME_INDEX]], [[C]](s64)
+    ; CHECK-NEXT: G_STORE [[COPY1]](<4 x s32>), [[PTR_ADD]](p0) :: (store (<4 x s32>) into %stack.0 + 16, basealign 32)
+    ; CHECK-NEXT: [[C1:%[0-9]+]]:_(s64) = G_CONSTANT i64 7
+    ; CHECK-NEXT: [[AND:%[0-9]+]]:_(s64) = G_AND %idxprom, [[C1]]
+    ; CHECK-NEXT: [[C2:%[0-9]+]]:_(s64) = G_CONSTANT i64 4
+    ; CHECK-NEXT: [[MUL:%[0-9]+]]:_(s64) = G_MUL [[AND]], [[C2]]
+    ; CHECK-NEXT: [[PTR_ADD1:%[0-9]+]]:_(p0) = G_PTR_ADD [[FRAME_INDEX]], [[MUL]](s64)
+    ; CHECK-NEXT: [[LOAD:%[0-9]+]]:_(s32) = G_LOAD [[PTR_ADD1]](p0) :: (load (s32))
+    ; CHECK-NEXT: $w0 = COPY [[LOAD]](s32)
+    ; CHECK-NEXT: RET_ReallyLR
+    %0:_(<4 x s32>) = COPY $q0
+    %1:_(<4 x s32>) = COPY $q1
+    %concat:_(<8 x s32>) = G_CONCAT_VECTORS %0(<4 x s32>), %1(<4 x s32>)
+    %idx:_(s32) = COPY $w0
+    %idxprom:_(s64) = G_SEXT %idx(s32)
+    %3:_(s32) = G_EXTRACT_VECTOR_ELT %concat:_(<8 x s32>), %idxprom:_(s64)
+    $w0 = COPY %3(s32)
+    RET_ReallyLR
+...
+---
+name:            test_eve_v16s16_unknown_idx
+body: |
+  bb.0:
+    liveins: $q0, $q1, $w0
+    ; CHECK-LABEL: name: test_eve_v16s16_unknown_idx
+    ; CHECK: [[COPY:%[0-9]+]]:_(<8 x s16>) = COPY $q0
+    ; CHECK-NEXT: [[COPY1:%[0-9]+]]:_(<8 x s16>) = COPY $q1
+    ; CHECK-NEXT: %idx:_(s32) = COPY $w0
+    ; CHECK-NEXT: %idxprom:_(s64) = G_SEXT %idx(s32)
+    ; CHECK-NEXT: [[FRAME_INDEX:%[0-9]+]]:_(p0) = G_FRAME_INDEX %stack.0
+    ; CHECK-NEXT: G_STORE [[COPY]](<8 x s16>), [[FRAME_INDEX]](p0) :: (store (<8 x s16>) into %stack.0, align 32)
+    ; CHECK-NEXT: [[C:%[0-9]+]]:_(s64) = G_CONSTANT i64 16
+    ; CHECK-NEXT: [[PTR_ADD:%[0-9]+]]:_(p0) = G_PTR_ADD [[FRAME_INDEX]], [[C]](s64)
+    ; CHECK-NEXT: G_STORE [[COPY1]](<8 x s16>), [[PTR_ADD]](p0) :: (store (<8 x s16>) into %stack.0 + 16, basealign 32)
+    ; CHECK-NEXT: [[C1:%[0-9]+]]:_(s64) = G_CONSTANT i64 15
+    ; CHECK-NEXT: [[AND:%[0-9]+]]:_(s64) = G_AND %idxprom, [[C1]]
+    ; CHECK-NEXT: [[C2:%[0-9]+]]:_(s64) = G_CONSTANT i64 2
+    ; CHECK-NEXT: [[MUL:%[0-9]+]]:_(s64) = G_MUL [[AND]], [[C2]]
+    ; CHECK-NEXT: [[PTR_ADD1:%[0-9]+]]:_(p0) = G_PTR_ADD [[FRAME_INDEX]], [[MUL]](s64)
+    ; CHECK-NEXT: [[LOAD:%[0-9]+]]:_(s16) = G_LOAD [[PTR_ADD1]](p0) :: (load (s16))
+    ; CHECK-NEXT: %ext:_(s32) = G_ANYEXT [[LOAD]](s16)
+    ; CHECK-NEXT: $w0 = COPY %ext(s32)
+    ; CHECK-NEXT: RET_ReallyLR
+    %0:_(<8 x s16>) = COPY $q0
+    %1:_(<8 x s16>) = COPY $q1
+    %concat:_(<16 x s16>) = G_CONCAT_VECTORS %0(<8 x s16>), %1(<8 x s16>)
+    %idx:_(s32) = COPY $w0
+    %idxprom:_(s64) = G_SEXT %idx(s32)
+    %3:_(s16) = G_EXTRACT_VECTOR_ELT %concat:_(<16 x s16>), %idxprom:_(s64)
+    %ext:_(s32) = G_ANYEXT %3
+    $w0 = COPY %ext(s32)
+    RET_ReallyLR
+...
+---
+name:            test_eve_v4p0_unknown_idx
+body: |
+  bb.0:
+    liveins: $x0
+    ; CHECK-LABEL: name: test_eve_v4p0_unknown_idx
+    ; CHECK: [[DEF:%[0-9]+]]:_(p0) = G_IMPLICIT_DEF
+    ; CHECK-NEXT: [[BUILD_VECTOR:%[0-9]+]]:_(<2 x p0>) = G_BUILD_VECTOR [[DEF]](p0), [[DEF]](p0)
+    ; CHECK-NEXT: [[BUILD_VECTOR1:%[0-9]+]]:_(<2 x p0>) = G_BUILD_VECTOR [[DEF]](p0), [[DEF]](p0)
+    ; CHECK-NEXT: %idx:_(s64) = COPY $x0
+    ; CHECK-NEXT: [[FRAME_INDEX:%[0-9]+]]:_(p0) = G_FRAME_INDEX %stack.0
+    ; CHECK-NEXT: [[BITCAST:%[0-9]+]]:_(<2 x s64>) = G_BITCAST [[BUILD_VECTOR]](<2 x p0>)
+    ; CHECK-NEXT: G_STORE [[BITCAST]](<2 x s64>), [[FRAME_INDEX]](p0) :: (store (<2 x s64>) into %stack.0, align 32)
+    ; CHECK-NEXT: [[C:%[0-9]+]]:_(s64) = G_CONSTANT i64 16
+    ; CHECK-NEXT: [[PTR_ADD:%[0-9]+]]:_(p0) = G_PTR_ADD [[FRAME_INDEX]], [[C]](s64)
+    ; CHECK-NEXT: [[BITCAST1:%[0-9]+]]:_(<2 x s64>) = G_BITCAST [[BUILD_VECTOR1]](<2 x p0>)
+    ; CHECK-NEXT: G_STORE [[BITCAST1]](<2 x s64>), [[PTR_ADD]](p0) :: (store (<2 x s64>) into %stack.0 + 16, basealign 32)
+    ; CHECK-NEXT: [[C1:%[0-9]+]]:_(s64) = G_CONSTANT i64 3
+    ; CHECK-NEXT: [[AND:%[0-9]+]]:_(s64) = G_AND %idx, [[C1]]
+    ; CHECK-NEXT: [[C2:%[0-9]+]]:_(s64) = G_CONSTANT i64 8
+    ; CHECK-NEXT: [[MUL:%[0-9]+]]:_(s64) = G_MUL [[AND]], [[C2]]
+    ; CHECK-NEXT: [[PTR_ADD1:%[0-9]+]]:_(p0) = G_PTR_ADD [[FRAME_INDEX]], [[MUL]](s64)
+    ; CHECK-NEXT: %eve:_(p0) = G_LOAD [[PTR_ADD1]](p0) :: (load (p0))
+    ; CHECK-NEXT: $x0 = COPY %eve(p0)
+    ; CHECK-NEXT: RET_ReallyLR
+    %vec:_(<4 x p0>) = G_IMPLICIT_DEF
+    %idx:_(s64) = COPY $x0
+    %eve:_(p0) = G_EXTRACT_VECTOR_ELT %vec:_(<4 x p0>), %idx:_(s64)
+    $x0 = COPY %eve(p0)
+    RET_ReallyLR
+...
+---
 name:            cant_legalize_different_address_spaces
 body: |
   bb.0:
diff --git a/llvm/test/CodeGen/AArch64/arm64-extract-insert-varidx.ll b/llvm/test/CodeGen/AArch64/arm64-extract-insert-varidx.ll
new file mode 100644
index 00000000000000..49ddc6f6147805
--- /dev/null
+++ b/llvm/test/CodeGen/AArch64/arm64-extract-insert-varidx.ll
@@ -0,0 +1,365 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 3
+; RUN: llc < %s -verify-machineinstrs -mtriple=aarch64-none-linux-gnu -mattr=+neon -fp-contract=fast | FileCheck %s --check-prefix=CHECK-SDAG
+; RUN: llc < %s -global-isel -global-isel-abort=2 -verify-machineinstrs -mtriple=aarch64-none-linux-gnu -mattr=+neon -fp-contract=fast | FileCheck %s --check-prefix=CHECK-GISEL
+
+define <4 x i8> @test_varidx_extract_v8s8(<8 x i8> %x, i32 %idx) {
+; CHECK-SDAG-LABEL: test_varidx_extract_v8s8:
+; CHECK-SDAG:       // %bb.0:
+; CHECK-SDAG-NEXT:    sub sp, sp, #16
+; CHECK-SDAG-NEXT:    .cfi_def_cfa_offset 16
+; CHECK-SDAG-NEXT:    add x8, sp, #8
+; CHECK-SDAG-NEXT:    // kill: def $w0 killed $w0 def $x0
+; CHECK-SDAG-NEXT:    // kill: def $d0 killed $d0 def $q0
+; CHECK-SDAG-NEXT:    str d0, [sp, #8]
+; CHECK-SDAG-NEXT:    umov w9, v0.b[1]
+; CHECK-SDAG-NEXT:    bfxil x8, x0, #0, #3
+; CHECK-SDAG-NEXT:    ld1 { v1.b }[0], [x8]
+; CHECK-SDAG-NEXT:    umov w8, v0.b[2]
+; CHECK-SDAG-NEXT:    mov v1.h[1], w9
+; CHECK-SDAG-NEXT:    umov w9, v0.b[3]
+; CHECK-SDAG-NEXT:    mov v1.h[2], w8
+; CHECK-SDAG-NEXT:    mov v1.h[3], w9
+; CHECK-SDAG-NEXT:    fmov d0, d1
+; CHECK-SDAG-NEXT:    add sp, sp, #16
+; CHECK-SDAG-NEXT:    ret
+;
+; CHECK-GISEL-LABEL: test_varidx_extract_v8s8:
+; CHECK-GISEL:       // %bb.0:
+; CHECK-GISEL-NEXT:    sub sp, sp, #16
+; CHECK-GISEL-NEXT:    .cfi_def_cfa_offset 16
+; CHECK-GISEL-NEXT:    mov w9, w0
+; CHECK-GISEL-NEXT:    add x8, sp, #8
+; CHECK-GISEL-NEXT:    // kill: def $d0 killed $d0 def $q0
+; CHECK-GISEL-NEXT:    str d0, [sp, #8]
+; CHECK-GISEL-NEXT:    and x9, x9, #0x7
+; CHECK-GISEL-NEXT:    mov b2, v0.b[1]
+; CHECK-GISEL-NEXT:    mov b3, v0.b[2]
+; CHECK-GISEL-NEXT:    lsl x10, x9, #1
+; CHECK-GISEL-NEXT:    mov b0, v0.b[3]
+; CHECK-GISEL-NEXT:    sub x9, x10, x9
+; CHECK-GISEL-NEXT:    add x8, x8, x9
+; CHECK-GISEL-NEXT:    ldrb w8, [x8]
+; CHECK-GISEL-NEXT:    fmov s1, w8
+; CHECK-GISEL-NEXT:    mov v1.h[1], v2.h[0]
+; CHECK-GISEL-NEXT:    mov v1.h[2], v3.h[0]
+; CHECK-GISEL-NEXT:    mov v1.h[3], v0.h[0]
+; CHECK-GISEL-NEXT:    fmov d0, d1
+; CHECK-GISEL-NEXT:    add sp, sp, #16
+; CHECK-GISEL-NEXT:    ret
+  %tmp = extractelement <8 x i8> %x, i32 %idx
+  %tmp2 = insertelement <4 x i8> undef, i8 %tmp, i32 0
+  %tmp3 = extractelement <8 x i8> %x, i32 1
+  %tmp4 = insertelement <4 x i8> %tmp2, i8 %tmp3, i32 1
+  %tmp5 = extractelement <8 x i8> %x, i32 2
+  %tmp6 = insertelement <4 x i8> %tmp4, i8 %tmp5, i32 2
+  %tmp7 = extractelement <8 x i8> %x, i32 3
+  %tmp8 = insertelement <4 x i8> %tmp6, i8 %tmp7, i32 3
+  ret <4 x i8> %tmp8
+}
+
+define <8 x i8> @test_varidx_extract_v16s8(<16 x i8> %x, i32 %idx) {
+; CHECK-SDAG-LABEL: test_varidx_extract_v16s8:
+; CHECK-SDAG:       // %bb.0:
+; CHECK-SDAG-NEXT:    sub sp, sp, #16
+; CHECK-SDAG-NEXT:    .cfi_def_cfa_offset 16
+; CHECK-SDAG-NEXT:    mov x8, sp
+; CHECK-SDAG-NEXT:    // kill: def $w0 killed $w0 def $x0
+; CHECK-SDAG-NEXT:    str q0, [sp]
+; CHECK-SDAG-NEXT:    bfxil x8, x0, #0, #4
+; CHECK-SDAG-NEXT:    ldr b1, [x8]
+; CHECK-SDAG-NEXT:    mov v1.b[1], v0.b[1]
+; CHECK-SDAG-NEXT:    mov v1.b[2], v0.b[2]
+; CHECK-SDAG-NEXT:    mov v1.b[3], v0.b[3]
+; CHECK-SDAG-NEXT:    mov v1.b[4], v0.b[4]
+; CHECK-SDAG-NEXT:    mov v1.b[5], v0.b[5]
+; CHECK-SDAG-NEXT:    mov v1.b[6], v0.b[6]
+; CHECK-SDAG-NEXT:    mov v1.b[7], v0.b[7]
+; CHECK-SDAG-NEXT:    fmov d0, d1
+; CHECK-SDAG-NEXT:    add sp, sp, #16
+; CHECK-SDAG-NEXT:    ret
+;
+; CHECK-GISEL-LABEL: test_varidx_extract_v16s8:
+; CHECK-GISEL:       // %bb.0:
+; CHECK-GISEL-NEXT:    sub sp, sp, #16
+; CHECK-GISEL-NEXT:    .cfi_def_cfa_offset 16
+; CHECK-GISEL-NEXT:    mov w9, w0
+; CHECK-GISEL-NEXT:    mov b2, v0.b[1]
+; CHECK-GISEL-NEXT:    mov x8, sp
+; CHECK-GISEL-NEXT:    and x9, x9, #0xf
+; CHECK-GISEL-NEXT:    str q0, [sp]
+; CHECK-GISEL-NEXT:    mov b3, v0.b[2]
+; CHECK-GISEL-NEXT:    lsl x10, x9, #1
+; CHECK-GISEL-NEXT:    sub x9, x10, x9
+; CHECK-GISEL-NEXT:    ldr b1, [x8, x9]
+; CHECK-GISEL-NEXT:    mov v1.b[1], v2.b[0]
+; CHECK-GISEL-NEXT:    mov b2, v0.b[3]
+; CHECK-GISEL-NEXT:    mov v1.b[2], v3.b[0]
+; CHECK-GISEL-NEXT:    mov b3, v0.b[4]
+; CHECK-GISEL-NEXT:    mov v1.b[3], v2.b[0]
+; CHECK-GISEL-NEXT:    mov b2, v0.b[5]
+; CHECK-GISEL-NEXT:    mov v1.b[4], v3.b[0]
+; CHECK-GISEL-NEXT:    mov b3, v0.b[6]
+; CHECK-GISEL-NEXT:    mov b0, v0.b[7]
+; CHECK-GISEL-NEXT:    mov v1.b[5], v2.b[0]
+; CHECK-GISEL-NEXT:    mov v1.b[6], v3.b[0]
+; CHECK-GISEL-NEXT:    mov v1.b[7], v0.b[0]
+; CHECK-GISEL-NEXT:    fmov d0, d1
+; CHECK-GISEL-NEXT:    add sp, sp, #16
+; CHECK-GISEL-NEXT:    ret
+  %tmp = extractelement <16 x i8> %x, i32 %idx
+  %tmp2 = insertelement <8 x i8> undef, i8 %tmp, i32 0
+  %tmp3 = extractelement <16 x i8> %x, i32 1
+  %tmp4 = insertelement <8 x i8> %tmp2, i8 %tmp3, i32 1
+  %tmp5 = extractelement <16 x i8> %x, i32 2
+  %tmp6 = insertelement <8 x i8> %tmp4, i8 %tmp5, i32 2
+  %tmp7 = extractelement <16 x i8> %x, i32 3
+  %tmp8 = insertelement <8 x i8> %tmp6, i8 %tmp7, i32 3
+  %tmp9 = extractelement <16 x i8> %x, i32 4
+  %tmp10 = insertelement <8 x i8> %tmp8, i8 %tmp9, i32 4
+  %tmp11 = extractelement <16 x i8> %x, i32 5
+  %tmp12 = insertelement <8 x i8> %tmp10, i8 %tmp11, i32 5
+  %tmp13 = extractelement <16 x i8> %x, i32 6
+  %tmp14 = insertelement <8 x i8> %tmp12, i8 %tmp13, i32 6
+  %tmp15 = extractelement <16 x i8> %x, i32 7
+  %tmp16 = insertelement <8 x i8> %tmp14, i8 %tmp15, i32 7
+  ret <8 x i8> %tmp16
+}
+
+define i16 @test_varidx_extract_v2s16(<2 x i16> %x, i32 %idx) {
+; CHECK-SDAG-LABEL: test_varidx_extract_v2s16:
+; CHECK-SDAG:       // %bb.0:
+; CHECK-SDAG-NEXT:    sub sp, sp, #16
+; CHECK-SDAG-NEXT:    .cfi_def_cfa_offset 16
+; CHECK-SDAG-NEXT:    add x8, sp, #8
+; CHECK-SDAG-NEXT:    // kill: def $w0 killed $w0 def $x0
+; CHECK-SDAG-NEXT:    str d0, [sp, #8]
+; CHECK-SDAG-NEXT:    bfi x8, x0, #2, #1
+; CHECK-SDAG-NEXT:    ldr w0, [x8]
+; CHECK-SDAG-NEXT:    add sp, sp, #16
+; CHECK-SDAG-NEXT:    ret
+;
+; CHECK-GISEL-LABEL: test_varidx_extract_v2s16:
+; CHECK-GISEL:       // %bb.0:
+; CHECK-GISEL-NEXT:    sub sp, sp, #16
+; CHECK-GISEL-NEXT:    .cfi_def_cfa_offset 16
+; CHECK-GISEL-NEXT:    // kill: def $d0 killed $d0 def $q0
+; CHECK-GISEL-NEXT:    mov s1, v0.s[1]
+; CHECK-GISEL-NEXT:    mov w9, w0
+; CHECK-GISEL-NEXT:    add x8, sp, #12
+; CHECK-GISEL-NEXT:    str h0, [sp, #12]
+; CHECK-GISEL-NEXT:    and x9, x9, #0x1
+; CHECK-GISEL-NEXT:    str h1, [sp, #14]
+; CHECK-GISEL-NEXT:    ldrh w0, [x8, x9, lsl #1]
+; CHECK-GISEL-NEXT:    add sp, sp, #16
+; CHECK-GISEL-NEXT:    ret
+  %tmp = extractelement <2 x i16> %x, i32 %idx
+  ret i16 %tmp
+}
+
+define <2 x i16> @test_varidx_extract_v4s16(<4 x i16> %x, i32 %idx) {
+; CHECK-SDAG-LABEL: test_varidx_extract_v4s16:
+; CHECK-SDAG:       // %bb.0:
+; CHECK-SDAG-NEXT:    sub sp, sp, #16
+; CHECK-SDAG-NEXT:    .cfi_def_cfa_offset 16
+; CHECK-SDAG-NEXT:    add x8, sp, #8
+; CHECK-SDAG-NEXT:    // kill: def $w0 killed $w0 def $x0
+; CHECK-SDAG-NEXT:    // kill: def $d0 killed $d0 def $q0
+; CHECK-SDAG-NEXT:    str d0, [sp, #8]
+; CHECK-SDAG-NEXT:    umov w9, v0.h[1]
+; CHECK-SDAG-NEXT:    bfi x8, x0, #1, #2
+; CHECK-SDAG-NEXT:    ld1 { v0.h }[0], [x8]
+; CHECK-SDAG-NEXT:    mov v0.s[1], w9
+; CHECK-SDAG-NEXT:    // kill: def $d0 killed $d0 killed $q0
+; CHECK-SDAG-NEXT:    add sp, sp, #16
+; CHECK-SDAG-NEXT:    ret
+;
+; CHECK-GISEL-LABEL: test_varidx_extract_v4s16:
+; CHECK-GISEL:       // %bb.0:
+; CHECK-GISEL-NEXT:    sub sp, sp, #16
+; CHECK-GISEL-NEXT:    .cfi_def_cfa_offset 16
+; CHECK-GISEL-NEXT:    mov w9, w0
+; CHECK-GISEL-NEXT:    mov w8, #2 // =0x2
+; CHECK-GISEL-NEXT:    add x10, sp, #8
+; CHECK-GISEL-NEXT:    and x9, x9, #0x3
+; CHECK-GISEL-NEXT:    // kill: def $d0 killed $d0 def $q0
+; CHECK-GISEL-NEXT:    str d0, [sp, #8]
+; CHECK-GISEL-NEXT:    madd x8, x9, x8, x10
+; CHECK-GISEL-NEXT:    umov w9, v0.h[1]
+; CHECK-GISEL-NEXT:    fmov s1, w9
+; CHECK-GISEL-NEXT:    ldr h0, [x8]
+; CHECK-GISEL-NEXT:    mov v0.s[1], v1.s[0]
+; CHECK-GISEL-NEXT:    // kill: def $d0 killed $d0 killed $q0
+; CHECK-GISEL-NEXT:    add sp, sp, #16
+; CHECK-GISEL-NEXT:    ret
+  %tmp = extractelement <4 x i16> %x, i32 %idx
+  %tmp2 = insertelement <2 x i16> undef, i16 %tmp, i32 0
+  %tmp3 = extractelement <4 x i16> %x, i32 1
+  %tmp4 = insertelement <2 x i16> %tmp2, i16 %tmp3, i32 1
+  ret <2 x i16> %tmp4
+}
+
+define <4 x i16> @test_varidx_extract_v8s16(<8 x i16> %x, i32 %idx) {
+; CHECK-SDAG-LABEL: test_varidx_extract_v8s16:
+; CHECK-SDAG:       // %bb.0:
+; CHECK-SDAG-NEXT:    sub sp, sp, #16
+; CHECK-SDAG-NEXT:    .cfi_def_cfa_offset 16
+; CHECK-SDAG-NEXT:    mov x8, sp
+; CHECK-SDAG-NEXT:    // kill: def $w0 killed $w0 def $x0
+; CHECK-SDAG-NEXT:    str q0, [sp]
+; CHECK-SDAG-NEXT:    bfi x8, x0, #1, #3
+; CHECK-SDAG-NEXT:    ldr h1, [x8]
+; CHECK-SDAG-NEXT:    mov v1.h[1], v0.h[1]
+; CHECK-SDAG-NEXT:    mov v1.h[2], v0.h[2]
+; CHECK-SDAG-NEXT:    mov v1.h[3], v0.h[3]
+; CHECK-SDAG-NEXT:    fmov d0, d1
+; CHECK-SDAG-NEXT:    add sp, sp, #16
+; CHECK-SDAG-NEXT:    ret
+;
+; CHECK-GISEL-LABEL: test_varidx_extract_v8s16:
+; CHECK-GISEL:       // %bb.0:
+; CHECK-GISEL-NEXT:    sub sp, sp, #16
+; CHECK-GISEL-NEXT:    .cfi_def_cfa_offset 16
+; CHECK-GISEL-NEXT:    mov w9, w0
+; CHECK-GISEL-NEXT:    mov h2, v0.h[1]
+; CHECK-GISEL-NEXT:    mov x8, sp
+; CHECK-GISEL-NEXT:    str q0, [sp]
+; CHECK-GISEL-NEXT:    and x9, x9, #0x7
+; CHECK-GISEL-NEXT:    mov h3, v0.h[2]
+; CHECK-GISEL-NEXT:    ldr h1, [x8, x9, lsl #1]
+; CHECK-GISEL-NEXT:    mov h0, v0.h[3]
+; CHECK-GISEL-NEXT:    mov v1.h[1], v2.h[0]
+; CHECK-GISEL-NEXT:    mov v1.h[2], v3.h[0]
+; CHECK-GISEL-NEXT:    mov v1.h[3], v0.h[0]
+; CHECK-GISEL-NEXT:    fmov d0, d1
+; CHECK-GISEL-NEXT:    add sp, sp, #16
+; CHECK-GISEL-NEXT:    ret
+  %tmp = extractelement <8 x i16> %x, i32 %idx
+  %tmp2 = insertelement <4 x i16> undef, i16 %tmp, i32 0
+  %tmp3 = extractelement <8 x i16> %x, i32 1
+  %tmp4 = insertelement <4 x i16> %tmp2, i16 %tmp3, i32 1
+  %tmp5 = extractelement <8 x i16> %x, i32 2
+  %tmp6 = insertelement <4 x i16> %tmp4, i16 %tmp5, i32 2
+  %tmp7 = extractelement <8 x i16> %x, i32 3
+  %tmp8 = insertelement <4 x i16> %tmp6, i16 %tmp7, i32 3
+  ret <4 x i16> %tmp8
+}
+
+define i32 @test_varidx_extract_v2s32(<2 x i32> %x, i32 %idx) {
+; CHECK-SDAG-LABEL: test_varidx_extract_v2s32:
+; CHECK-SDAG:       // %bb.0:
+; CHECK-SDAG-NEXT:    sub sp, sp, #16
+; CHECK-SDAG-NEXT:    .cfi_def_cfa_offset 16
+; CHECK-SDAG-NEXT:    add x8, sp, #8
+; CHECK-SDAG-NEXT:    // kill: def $w0 killed $w0 def $x0
+; CHECK-SDAG-NEXT:    str d0, [sp, #8]
+; CHECK-SDAG-NEXT:    bfi x8, x0, #2, #1
+; CHECK-SDAG-NEXT:    ldr w0, [x8]
+; CHECK-SDAG-NEXT:    add sp, sp, #16
+; CHECK-SDAG-NEXT:    ret
+;
+; CHECK-GISEL-LABEL: test_varidx_extract_v2s32:
+; CHECK-GISEL:       // %bb.0:
+; CHECK-GISEL-NEXT:    sub sp, sp, #16
+; CHECK-GISEL-NEXT:    .cfi_def_cfa_offset 16
+; CHECK-GISEL-NEXT:    mov w9, w0
+; CHECK-GISEL-NEXT:    add x8, sp, #8
+; CHECK-GISEL-NEXT:    str d0, [sp, #8]
+; CHECK-GISEL-NEXT:    and x9, x9, #0x1
+; CHECK-GISEL-NEXT:    ldr w0, [x8, x9, lsl #2]
+; CHECK-GISEL-NEXT:    add sp, sp, #16
+; CHECK-GISEL-NEXT:    ret
+  %tmp = extractelement <2 x i32> %x, i32 %idx
+  ret i32 %tmp
+}
+
+define <2 x i32> @test_varidx_extract_v4s32(<4 x i32> %x, i32 %idx) {
+; CHECK-SDAG-LABEL: test_varidx_extract_v4s32:
+; CHECK-SDAG:       // %bb.0:
+; CHECK-SDAG-NEXT:    sub sp, sp, #16
+; CHECK-SDAG-NEXT:    .cfi_def_cfa_offset 16
+; CHECK-SDAG-NEXT:    mov x8, sp
+; CHECK-SDAG-NEXT:    // kill: def $w0 killed $w0 def $x0
+; CHECK-SDAG-NEXT:    str q0, [sp]
+; CHECK-SDAG-NEXT:    bfi x8, x0, #2, #2
+; CHECK-SDAG-NEXT:    ldr s1, [x8]
+; CHECK-SDAG-NEXT:    mov v1.s[1], v0.s[1]
+; CHECK-SDAG-NEXT:    fmov d0, d1
+; CHECK-SDAG-NEXT:    add sp, sp, #16
+; CHECK-SDAG-NEXT:    ret
+;
+; CHECK-GISEL-LABEL: test_varidx_extract_v4s32:
+; CHECK-GISEL:       // %bb.0:
+; CHECK-GISEL-NEXT:    sub sp, sp, #16
+; CHECK-GISEL-NEXT:    .cfi_def_cfa_offset 16
+; CHECK-GISEL-NEXT:    mov w9, w0
+; CHECK-GISEL-NEXT:    mov s1, v0.s[1]
+; CHECK-GISEL-NEXT:    mov x8, sp
+; CHECK-GISEL-NEXT:    str q0, [sp]
+; CHECK-GISEL-NEXT:    and x9, x9, #0x3
+; CHECK-GISEL-NEXT:    ldr s0, [x8, x9, lsl #2]
+; CHECK-GISEL-NEXT:    mov v0.s[1], v1.s[0]
+; CHECK-GISEL-NEXT:    // kill: def $d0 killed $d0 killed $q0
+; CHECK-GISEL-NEXT:    add sp, sp, #16
+; CHECK-GISEL-NEXT:    ret
+  %tmp = extractelement <4 x i32> %x, i32 %idx
+  %tmp2 = insertelement <2 x i32> undef, i32 %tmp, i32 0
+  %tmp3 = extractelement <4 x i32> %x, i32 1
+  %tmp4 = insertelement <2 x i32> %tmp2, i32 %tmp3, i32 1
+  ret <2 x i32> %tmp4
+}
+
+define i64 @test_varidx_extract_v2s64(<2 x i64> %x, i32 %idx) {
+; CHECK-SDAG-LABEL: test_varidx_extract_v2s64:
+; CHECK-SDAG:       // %bb.0:
+; CHECK-SDAG-NEXT:    sub sp, sp, #16
+; CHECK-SDAG-NEXT:    .cfi_def_cfa_offset 16
+; CHECK-SDAG-NEXT:    mov x8, sp
+; CHECK-SDAG-NEXT:    // kill: def $w0 killed $w0 def $x0
+; CHECK-SDAG-NEXT:    str q0, [sp]
+; CHECK-SDAG-NEXT:    bfi x8, x0, #3, #1
+; CHECK-SDAG-NEXT:    ldr x0, [x8]
+; CHECK-SDAG-NEXT:    add sp, sp, #16
+; CHECK-SDAG-NEXT:    ret
+;
+; CHECK-GISEL-LABEL: test_varidx_extract_v2s64:
+; CHECK-GISEL:       // %bb.0:
+; CHECK-GISEL-NEXT:    sub sp, sp, #16
+; CHECK-GISEL-NEXT:    .cfi_def_cfa_offset 16
+; CHECK-GISEL-NEXT:    mov w9, w0
+; CHECK-GISEL-NEXT:    mov x8, sp
+; CHECK-GISEL-NEXT:    str q0, [sp]
+; CHECK-GISEL-NEXT:    and x9, x9, #0x1
+; CHECK-GISEL-NEXT:    ldr x0, [x8, x9, lsl #3]
+; CHECK-GISEL-NEXT:    add sp, sp, #16
+; CHECK-GISEL-NEXT:    ret
+  %tmp = extractelement <2 x i64> %x, i32 %idx
+  ret i64 %tmp
+}
+
+define ptr @test_varidx_extract_v2p0(<2 x ptr> %x, i32 %idx) {
+; CHECK-SDAG-LABEL: test_varidx_extract_v2p0:
+; CHECK-SDAG:       // %bb.0:
+; CHECK-SDAG-NEXT:    sub sp, sp, #16
+; CHECK-SDAG-NEXT:    .cfi_def_cfa_offset 16
+; CHECK-SDAG-NEXT:    mov x8, sp
+; CHECK-SDAG-NEXT:    // kill: def $w0 killed $w0 def $x0
+; CHECK-SDAG-NEXT:    str q0, [sp]
+; CHECK-SDAG-NEXT:    bfi x8, x0, #3, #1
+; CHECK-SDAG-NEXT:    ldr x0, [x8]
+; CHECK-SDAG-NEXT:    add sp, sp, #16
+; CHECK-SDAG-NEXT:    ret
+;
+; CHECK-GISEL-LABEL: test_varidx_extract_v2p0:
+; CHECK-GISEL:       // %bb.0:
+; CHECK-GISEL-NEXT:    sub sp, sp, #16
+; CHECK-GISEL-NEXT:    .cfi_def_cfa_offset 16
+; CHECK-GISEL-NEXT:    mov w9, w0
+; CHECK-GISEL-NEXT:    mov x8, sp
+; CHECK-GISEL-NEXT:    str q0, [sp]
+; CHECK-GISEL-NEXT:    and x9, x9, #0x1
+; CHECK-GISEL-NEXT:    ldr x0, [x8, x9, lsl #3]
+; CHECK-GISEL-NEXT:    add sp, sp, #16
+; CHECK-GISEL-NEXT:    ret
+  %tmp = extractelement <2 x ptr> %x, i32 %idx
+  ret ptr %tmp
+}