[RISCV] Introduce unaligned-vector-mem feature

[reames]

Summary

This allows us to model and thus test transforms which are legal only when a vector load with less than element alignment are supported. This was originally part of D126085, but was split out as we didn't have a good example of such a transform. As can be seen in the test diffs, we have the recently added concat_vector(loads) -> strided_load transform (from D147713) which now benefits from the unaligned support.

While making this change, I realized that we actually *do* support unaligned vector loads and stores of all types via conversion to i8 element type. For contiguous loads and stores, we actually already implement this in the backend - though we don't tell the optimizer that. For indexed, lowering to i8 requires complicated addressing. For indexed and segmented, we'd have to use indexed. All around, doesn't seem worthwhile pursuing, but makes for an interesting observation.

[reames]

This comment was removed by reames.

[reames]

(Sent myself on a wild goose chase around the unaligned_access elf attribute. We'd discussed it in the original review, and landed without. I thought we'd later decided to add it, but I can't find evidence of that in tree or in history. So, it appears I just misremembered the outcome.)

[craig.topper]

While making this change, I realized that we actually *do* support unaligned vector loads and stores of all types via conversion to i8 element type. For contiguous loads and stores, we actually already implement this in the backend - though we don't tell the optimizer that. For indexed, lowering to i8 requires complicated addressing. For indexed and segmented, we'd have to use indexed. All around, doesn't seem worthwhile pursuing, but makes for an interesting observation.

I don't think we support unaligned using i8 for contiguous masked load/store or VP load/store.

[craig.topper]

llvm/test/CodeGen/RISCV/rvv/fixed-vectors-strided-load-combine.ll

409–410

Might want to tweak this comment to mention unaligned-vector-mem

[reames]

In D149375#4303396, @craig.topper wrote:

While making this change, I realized that we actually *do* support unaligned vector loads and stores of all types via conversion to i8 element type. For contiguous loads and stores, we actually already implement this in the backend - though we don't tell the optimizer that. For indexed, lowering to i8 requires complicated addressing. For indexed and segmented, we'd have to use indexed. All around, doesn't seem worthwhile pursuing, but makes for an interesting observation.

I don't think we support unaligned using i8 for contiguous masked load/store or VP load/store.

You're correct about masking, and I didn't look at VP. Masking could be handled, but isn't today. For the moment, I just updated the comment in the commit and source.

llvm/test/CodeGen/RISCV/rvv/fixed-vectors-strided-load-combine.ll

409–410

Deleted the comment. Swear I did that before posting the patch, but seems not.

[asb]

LGTM.

llvm/lib/Target/RISCV/RISCVFeatures.td

 def FeatureSaveRestore : SubtargetFeature<"save-restore", "EnableSaveRestore",
                                           "true", "Enable save/restore.">;
 
 def FeatureUnalignedScalarMem
    : SubtargetFeature<"unaligned-scalar-mem", "EnableUnalignedScalarMem",
                       "true", "Has reasonably performant unaligned scalar "
                       "loads and stores">;
 
+def FeatureUnalignedVectorMem
+   : SubtargetFeature<"unaligned-vector-mem", "EnableUnalignedVectorMem",
+                      "true", "Has reasonably performant unaligned vector "
+                      "loads and stores">;
+
 def TuneNoOptimizedZeroStrideLoad
    : SubtargetFeature<"no-optimized-zero-stride-load", "HasOptimizedZeroStrideLoad",
                       "false", "Hasn't optimized (perform fewer memory operations)"
                       "zero-stride vector load">;
 
 def TuneLUIADDIFusion
     : SubtargetFeature<"lui-addi-fusion", "HasLUIADDIFusion",
                        "true", "Enable LUI+ADDI macrofusion">;

llvm/lib/Target/RISCV/RISCVISelLowering.cpp

bool RISCVTargetLowering::allowsMisalignedMemoryAccesses(
   // All vector implementations must support element alignment
   EVT ElemVT = VT.getVectorElementType();
   if (Alignment >= ElemVT.getStoreSize()) {
     if (Fast)
       *Fast = 1;
     return true;
   }
 
-  return false;
+  // Note: We lower an unmasked unaligned vector access to an equally sized
+  // e8 element type access.  Given this, we effectively support all unmasked
+  // misaligned accesses.  TODO: Work through the codegen implications of
+  // allowing such accesses to be formed, and considered fast.
+  if (Fast)
+    *Fast = 0;
+  return Subtarget.enableUnalignedVectorMem();
 }
 
 bool RISCVTargetLowering::splitValueIntoRegisterParts(
     SelectionDAG &DAG, const SDLoc &DL, SDValue Val, SDValue *Parts,
     unsigned NumParts, MVT PartVT, std::optional<CallingConv::ID> CC) const {
   bool IsABIRegCopy = CC.has_value();
   EVT ValueVT = Val.getValueType();
   if (IsABIRegCopy && ValueVT == MVT::f16 && PartVT == MVT::f32) {
bool RISCVTargetLowering::isLegalStridedLoadStore(const DataLayout &DL,
   // Only support fixed vectors if we know the minimum vector size.
   if (isa<FixedVectorType>(DataType) && !Subtarget.useRVVForFixedLengthVectors())
     return false;
 
   Type *ScalarType = DataType->getScalarType();
   if (!isLegalElementTypeForRVV(ScalarType))
     return false;
 
-  if (Alignment < DL.getTypeStoreSize(ScalarType).getFixedValue())
+  if (!Subtarget.enableUnalignedVectorMem() &&
+      Alignment < DL.getTypeStoreSize(ScalarType).getFixedValue())
     return false;
 
   return true;
 }
 
 /// Lower an interleaved load into a vlsegN intrinsic.
 ///
 /// E.g. Lower an interleaved load (Factor = 2):

llvm/lib/Target/RISCV/RISCVTargetTransformInfo.h

public:
   bool isLegalMaskedLoadStore(Type *DataType, Align Alignment) {
     if (!ST->hasVInstructions())
       return false;
 
     // Only support fixed vectors if we know the minimum vector size.
     if (isa<FixedVectorType>(DataType) && !ST->useRVVForFixedLengthVectors())
       return false;
 
-    if (Alignment <
-        DL.getTypeStoreSize(DataType->getScalarType()).getFixedValue())
+    auto *ElemType = DataType->getScalarType();
+    if (!ST->enableUnalignedVectorMem() &&
+        Alignment < DL.getTypeStoreSize(ElemType).getFixedValue())
       return false;
 
-    return TLI->isLegalElementTypeForRVV(DataType->getScalarType());
+    return TLI->isLegalElementTypeForRVV(ElemType);
   }
 
   bool isLegalMaskedLoad(Type *DataType, Align Alignment) {
     return isLegalMaskedLoadStore(DataType, Alignment);
   }
   bool isLegalMaskedStore(Type *DataType, Align Alignment) {
     return isLegalMaskedLoadStore(DataType, Alignment);
   }
 
   bool isLegalMaskedGatherScatter(Type *DataType, Align Alignment) {
     if (!ST->hasVInstructions())
       return false;
 
     // Only support fixed vectors if we know the minimum vector size.
     if (isa<FixedVectorType>(DataType) && !ST->useRVVForFixedLengthVectors())
       return false;
 
-    if (Alignment <
-        DL.getTypeStoreSize(DataType->getScalarType()).getFixedValue())
+    auto *ElemType = DataType->getScalarType();
+    if (!ST->enableUnalignedVectorMem() &&
+        Alignment < DL.getTypeStoreSize(ElemType).getFixedValue())
       return false;
 
-    return TLI->isLegalElementTypeForRVV(DataType->getScalarType());
+    return TLI->isLegalElementTypeForRVV(ElemType);
   }
 
   bool isLegalMaskedGather(Type *DataType, Align Alignment) {
     return isLegalMaskedGatherScatter(DataType, Alignment);
   }
   bool isLegalMaskedScatter(Type *DataType, Align Alignment) {
     return isLegalMaskedGatherScatter(DataType, Alignment);
   }

llvm/test/CodeGen/RISCV/rvv/fixed-vectors-strided-load-combine.ll

 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 2
-; RUN: llc -mtriple=riscv32 -mattr=+v,+zfh,+experimental-zvfh -verify-machineinstrs < %s | FileCheck %s -check-prefixes=CHECK,RV32
-; RUN: llc -mtriple=riscv64 -mattr=+v,+zfh,+experimental-zvfh -verify-machineinstrs < %s | FileCheck %s -check-prefixes=CHECK,RV64
-; RUN: llc -mtriple=riscv64 -mattr=+f,+zfh,+zve64f,+zvl128b,+experimental-zvfh -verify-machineinstrs < %s | FileCheck %s -check-prefixes=CHECK,ZVE64F
+; RUN: llc -mtriple=riscv32 -mattr=+v,+zfh,+experimental-zvfh -verify-machineinstrs < %s | FileCheck %s -check-prefixes=CHECK,CHECK-NO-MISALIGN,RV32
+; RUN: llc -mtriple=riscv64 -mattr=+v,+zfh,+experimental-zvfh -verify-machineinstrs < %s | FileCheck %s -check-prefixes=CHECK,CHECK-NO-MISALIGN,RV64
+; RUN: llc -mtriple=riscv64 -mattr=+v,+zfh,+experimental-zvfh,+unaligned-vector-mem -verify-machineinstrs < %s | FileCheck %s -check-prefixes=CHECK,RV64,RV64-MISALIGN
+
+; RUN: llc -mtriple=riscv64 -mattr=+f,+zfh,+zve64f,+zvl128b,+experimental-zvfh -verify-machineinstrs < %s | FileCheck %s -check-prefixes=CHECK,CHECK-NO-MISALIGN,ZVE64F
 
 ; The two loads are contigous and should be folded into one
 define void @widen_2xv4i16(ptr %x, ptr %z) {
 ; CHECK-LABEL: widen_2xv4i16:
 ; CHECK:       # %bb.0:
 ; CHECK-NEXT:    vsetivli zero, 8, e16, m1, ta, ma
 ; CHECK-NEXT:    vle16.v v8, (a0)
 ; CHECK-NEXT:    vse16.v v8, (a1)
; CHECK-NEXT:    ret
   %d = load <4 x i16>, ptr %d.gep
   %e.0 = shufflevector <4 x i16> %a, <4 x i16> %b, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7>
   %e.1 = shufflevector <4 x i16> %c, <4 x i16> %d, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7>
   %e.2 = shufflevector <8 x i16> %e.0, <8 x i16> %e.1, <16 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15>
   store <16 x i16> %e.2, ptr %z
   ret void
 }
 
+define void @widen_4xv4i16_unaligned(ptr %x, ptr %z) {
+; CHECK-NO-MISALIGN-LABEL: widen_4xv4i16_unaligned:
+; CHECK-NO-MISALIGN:       # %bb.0:
+; CHECK-NO-MISALIGN-NEXT:    vsetivli zero, 8, e8, mf2, ta, ma
+; CHECK-NO-MISALIGN-NEXT:    vle8.v v8, (a0)
+; CHECK-NO-MISALIGN-NEXT:    addi a2, a0, 8
+; CHECK-NO-MISALIGN-NEXT:    vle8.v v10, (a2)
+; CHECK-NO-MISALIGN-NEXT:    addi a2, a0, 16
+; CHECK-NO-MISALIGN-NEXT:    vle8.v v12, (a2)
+; CHECK-NO-MISALIGN-NEXT:    addi a0, a0, 24
+; CHECK-NO-MISALIGN-NEXT:    vle8.v v14, (a0)
+; CHECK-NO-MISALIGN-NEXT:    vsetivli zero, 8, e16, m2, tu, ma
+; CHECK-NO-MISALIGN-NEXT:    vslideup.vi v8, v10, 4
+; CHECK-NO-MISALIGN-NEXT:    vsetivli zero, 12, e16, m2, tu, ma
+; CHECK-NO-MISALIGN-NEXT:    vslideup.vi v8, v12, 8
+; CHECK-NO-MISALIGN-NEXT:    vsetivli zero, 16, e16, m2, ta, ma
+; CHECK-NO-MISALIGN-NEXT:    vslideup.vi v8, v14, 12
+; CHECK-NO-MISALIGN-NEXT:    vse16.v v8, (a1)
+; CHECK-NO-MISALIGN-NEXT:    ret
+;
+; RV64-MISALIGN-LABEL: widen_4xv4i16_unaligned:
+; RV64-MISALIGN:       # %bb.0:
+; RV64-MISALIGN-NEXT:    vsetivli zero, 16, e16, m2, ta, ma
+; RV64-MISALIGN-NEXT:    vle16.v v8, (a0)
+; RV64-MISALIGN-NEXT:    vse16.v v8, (a1)
+; RV64-MISALIGN-NEXT:    ret
+  %a = load <4 x i16>, ptr %x, align 1
+  %b.gep = getelementptr i8, ptr %x, i64 8
+  %b = load <4 x i16>, ptr %b.gep, align 1
+  %c.gep = getelementptr i8, ptr %b.gep, i64 8
+  %c = load <4 x i16>, ptr %c.gep, align 1
+  %d.gep = getelementptr i8, ptr %c.gep, i64 8
+  %d = load <4 x i16>, ptr %d.gep, align 1
+  %e.0 = shufflevector <4 x i16> %a, <4 x i16> %b, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7>
+  %e.1 = shufflevector <4 x i16> %c, <4 x i16> %d, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7>
+  %e.2 = shufflevector <8 x i16> %e.0, <8 x i16> %e.1, <16 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15>
+  store <16 x i16> %e.2, ptr %z
+  ret void
+}
+
 ; Should be a strided load - with type coercion to i64
 define void @strided_constant(ptr %x, ptr %z) {
 ; CHECK-LABEL: strided_constant:
 ; CHECK:       # %bb.0:
 ; CHECK-NEXT:    li a2, 16
 ; CHECK-NEXT:    vsetivli zero, 2, e64, m1, ta, ma
 ; CHECK-NEXT:    vlse64.v v8, (a0), a2
 ; CHECK-NEXT:    vse64.v v8, (a1)
; CHECK-NEXT:    ret
   %d.gep = getelementptr i8, ptr %c.gep, i64 %s
   %d = load <2 x float>, ptr %d.gep
   %e.0 = shufflevector <2 x float> %a, <2 x float> %b, <4 x i32> <i32 0, i32 1, i32 2, i32 3>
   %e.1 = shufflevector <2 x float> %c, <2 x float> %d, <4 x i32> <i32 0, i32 1, i32 2, i32 3>
   %e.2 = shufflevector <4 x float> %e.0, <4 x float> %e.1, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7>
   store <8 x float> %e.2, ptr %z
   ret void
 }
 
-; Shouldn't be combined because the resulting load would not be aligned
 define void @strided_unaligned(ptr %x, ptr %z, i64 %s) {
-; CHECK-LABEL: strided_unaligned:
-; CHECK:       # %bb.0:
-; CHECK-NEXT:    vsetivli zero, 8, e16, m1, ta, ma
-; CHECK-NEXT:    vle8.v v8, (a0)
-; CHECK-NEXT:    add a0, a0, a2
-; CHECK-NEXT:    vle8.v v9, (a0)
-; CHECK-NEXT:    vslideup.vi v8, v9, 4
-; CHECK-NEXT:    vse16.v v8, (a1)
-; CHECK-NEXT:    ret
+; CHECK-NO-MISALIGN-LABEL: strided_unaligned:
+; CHECK-NO-MISALIGN:       # %bb.0:
+; CHECK-NO-MISALIGN-NEXT:    vsetivli zero, 8, e16, m1, ta, ma
+; CHECK-NO-MISALIGN-NEXT:    vle8.v v8, (a0)
+; CHECK-NO-MISALIGN-NEXT:    add a0, a0, a2
+; CHECK-NO-MISALIGN-NEXT:    vle8.v v9, (a0)
+; CHECK-NO-MISALIGN-NEXT:    vslideup.vi v8, v9, 4
+; CHECK-NO-MISALIGN-NEXT:    vse16.v v8, (a1)
+; CHECK-NO-MISALIGN-NEXT:    ret
+;
+; RV64-MISALIGN-LABEL: strided_unaligned:
+; RV64-MISALIGN:       # %bb.0:
+; RV64-MISALIGN-NEXT:    vsetivli zero, 2, e64, m1, ta, ma
+; RV64-MISALIGN-NEXT:    vlse64.v v8, (a0), a2
+; RV64-MISALIGN-NEXT:    vse64.v v8, (a1)
+; RV64-MISALIGN-NEXT:    ret
   %a = load <4 x i16>, ptr %x, align 1
   %b.gep = getelementptr i8, ptr %x, i64 %s
   %b = load <4 x i16>, ptr %b.gep, align 1
   %c = shufflevector <4 x i16> %a, <4 x i16> %b, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7>
   store <8 x i16> %c, ptr %z
   ret void
 }
 

llvm/test/CodeGen/RISCV/rvv/unaligned-loads-stores.ll

 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
 ; RUN: llc -mtriple riscv32 -mattr=+d,+zfh,+experimental-zvfh,+v < %s \
 ; RUN:    -verify-machineinstrs | FileCheck %s
 ; RUN: llc -mtriple riscv64 -mattr=+d,+zfh,+experimental-zvfh,+v < %s \
 ; RUN:    -verify-machineinstrs | FileCheck %s
+; RUN: llc -mtriple riscv32 -mattr=+d,+zfh,+experimental-zvfh,+v,+unaligned-vector-mem < %s \
+; RUN:    -verify-machineinstrs | FileCheck --check-prefix=UNALIGNED %s
+; RUN: llc -mtriple riscv64 -mattr=+d,+zfh,+experimental-zvfh,+v,+unaligned-vector-mem < %s \
+; RUN:    -verify-machineinstrs | FileCheck --check-prefix=UNALIGNED %s
+
 
 define <vscale x 1 x i32> @unaligned_load_nxv1i32_a1(<vscale x 1 x i32>* %ptr) {
 ; CHECK-LABEL: unaligned_load_nxv1i32_a1:
 ; CHECK:       # %bb.0:
 ; CHECK-NEXT:    vsetvli a1, zero, e8, mf2, ta, ma
 ; CHECK-NEXT:    vle8.v v8, (a0)
 ; CHECK-NEXT:    ret
+;
+; UNALIGNED-LABEL: unaligned_load_nxv1i32_a1:
+; UNALIGNED:       # %bb.0:
+; UNALIGNED-NEXT:    vsetvli a1, zero, e32, mf2, ta, ma
+; UNALIGNED-NEXT:    vle32.v v8, (a0)
+; UNALIGNED-NEXT:    ret
   %v = load <vscale x 1 x i32>, <vscale x 1 x i32>* %ptr, align 1
   ret <vscale x 1 x i32> %v
 }
 
 define <vscale x 1 x i32> @unaligned_load_nxv1i32_a2(<vscale x 1 x i32>* %ptr) {
 ; CHECK-LABEL: unaligned_load_nxv1i32_a2:
 ; CHECK:       # %bb.0:
 ; CHECK-NEXT:    vsetvli a1, zero, e8, mf2, ta, ma
 ; CHECK-NEXT:    vle8.v v8, (a0)
 ; CHECK-NEXT:    ret
+;
+; UNALIGNED-LABEL: unaligned_load_nxv1i32_a2:
+; UNALIGNED:       # %bb.0:
+; UNALIGNED-NEXT:    vsetvli a1, zero, e32, mf2, ta, ma
+; UNALIGNED-NEXT:    vle32.v v8, (a0)
+; UNALIGNED-NEXT:    ret
   %v = load <vscale x 1 x i32>, <vscale x 1 x i32>* %ptr, align 2
   ret <vscale x 1 x i32> %v
 }
 
 define <vscale x 1 x i32> @aligned_load_nxv1i32_a4(<vscale x 1 x i32>* %ptr) {
 ; CHECK-LABEL: aligned_load_nxv1i32_a4:
 ; CHECK:       # %bb.0:
 ; CHECK-NEXT:    vsetvli a1, zero, e32, mf2, ta, ma
 ; CHECK-NEXT:    vle32.v v8, (a0)
 ; CHECK-NEXT:    ret
+;
+; UNALIGNED-LABEL: aligned_load_nxv1i32_a4:
+; UNALIGNED:       # %bb.0:
+; UNALIGNED-NEXT:    vsetvli a1, zero, e32, mf2, ta, ma
+; UNALIGNED-NEXT:    vle32.v v8, (a0)
+; UNALIGNED-NEXT:    ret
   %v = load <vscale x 1 x i32>, <vscale x 1 x i32>* %ptr, align 4
   ret <vscale x 1 x i32> %v
 }
 
 define <vscale x 1 x i64> @unaligned_load_nxv1i64_a1(<vscale x 1 x i64>* %ptr) {
 ; CHECK-LABEL: unaligned_load_nxv1i64_a1:
 ; CHECK:       # %bb.0:
 ; CHECK-NEXT:    vl1r.v v8, (a0)
 ; CHECK-NEXT:    ret
+;
+; UNALIGNED-LABEL: unaligned_load_nxv1i64_a1:
+; UNALIGNED:       # %bb.0:
+; UNALIGNED-NEXT:    vl1re64.v v8, (a0)
+; UNALIGNED-NEXT:    ret
   %v = load <vscale x 1 x i64>, <vscale x 1 x i64>* %ptr, align 1
   ret <vscale x 1 x i64> %v
 }
 
 define <vscale x 1 x i64> @unaligned_load_nxv1i64_a4(<vscale x 1 x i64>* %ptr) {
 ; CHECK-LABEL: unaligned_load_nxv1i64_a4:
 ; CHECK:       # %bb.0:
 ; CHECK-NEXT:    vl1r.v v8, (a0)
 ; CHECK-NEXT:    ret
+;
+; UNALIGNED-LABEL: unaligned_load_nxv1i64_a4:
+; UNALIGNED:       # %bb.0:
+; UNALIGNED-NEXT:    vl1re64.v v8, (a0)
+; UNALIGNED-NEXT:    ret
   %v = load <vscale x 1 x i64>, <vscale x 1 x i64>* %ptr, align 4
   ret <vscale x 1 x i64> %v
 }
 
 define <vscale x 1 x i64> @aligned_load_nxv1i64_a8(<vscale x 1 x i64>* %ptr) {
 ; CHECK-LABEL: aligned_load_nxv1i64_a8:
 ; CHECK:       # %bb.0:
 ; CHECK-NEXT:    vl1re64.v v8, (a0)
 ; CHECK-NEXT:    ret
+;
+; UNALIGNED-LABEL: aligned_load_nxv1i64_a8:
+; UNALIGNED:       # %bb.0:
+; UNALIGNED-NEXT:    vl1re64.v v8, (a0)
+; UNALIGNED-NEXT:    ret
   %v = load <vscale x 1 x i64>, <vscale x 1 x i64>* %ptr, align 8
   ret <vscale x 1 x i64> %v
 }
 
 define <vscale x 2 x i64> @unaligned_load_nxv2i64_a1(<vscale x 2 x i64>* %ptr) {
 ; CHECK-LABEL: unaligned_load_nxv2i64_a1:
 ; CHECK:       # %bb.0:
 ; CHECK-NEXT:    vl2r.v v8, (a0)
 ; CHECK-NEXT:    ret
+;
+; UNALIGNED-LABEL: unaligned_load_nxv2i64_a1:
+; UNALIGNED:       # %bb.0:
+; UNALIGNED-NEXT:    vl2re64.v v8, (a0)
+; UNALIGNED-NEXT:    ret
   %v = load <vscale x 2 x i64>, <vscale x 2 x i64>* %ptr, align 1
   ret <vscale x 2 x i64> %v
 }
 
 define <vscale x 2 x i64> @unaligned_load_nxv2i64_a4(<vscale x 2 x i64>* %ptr) {
 ; CHECK-LABEL: unaligned_load_nxv2i64_a4:
 ; CHECK:       # %bb.0:
 ; CHECK-NEXT:    vl2r.v v8, (a0)
 ; CHECK-NEXT:    ret
+;
+; UNALIGNED-LABEL: unaligned_load_nxv2i64_a4:
+; UNALIGNED:       # %bb.0:
+; UNALIGNED-NEXT:    vl2re64.v v8, (a0)
+; UNALIGNED-NEXT:    ret
   %v = load <vscale x 2 x i64>, <vscale x 2 x i64>* %ptr, align 4
   ret <vscale x 2 x i64> %v
 }
 
 define <vscale x 2 x i64> @aligned_load_nxv2i64_a8(<vscale x 2 x i64>* %ptr) {
 ; CHECK-LABEL: aligned_load_nxv2i64_a8:
 ; CHECK:       # %bb.0:
 ; CHECK-NEXT:    vl2re64.v v8, (a0)
 ; CHECK-NEXT:    ret
+;
+; UNALIGNED-LABEL: aligned_load_nxv2i64_a8:
+; UNALIGNED:       # %bb.0:
+; UNALIGNED-NEXT:    vl2re64.v v8, (a0)
+; UNALIGNED-NEXT:    ret
   %v = load <vscale x 2 x i64>, <vscale x 2 x i64>* %ptr, align 8
   ret <vscale x 2 x i64> %v
 }
 
 ; Masks should always be aligned
 define <vscale x 1 x i1> @unaligned_load_nxv1i1_a1(<vscale x 1 x i1>* %ptr) {
 ; CHECK-LABEL: unaligned_load_nxv1i1_a1:
 ; CHECK:       # %bb.0:
 ; CHECK-NEXT:    vsetvli a1, zero, e8, mf8, ta, ma
 ; CHECK-NEXT:    vlm.v v0, (a0)
 ; CHECK-NEXT:    ret
+;
+; UNALIGNED-LABEL: unaligned_load_nxv1i1_a1:
+; UNALIGNED:       # %bb.0:
+; UNALIGNED-NEXT:    vsetvli a1, zero, e8, mf8, ta, ma
+; UNALIGNED-NEXT:    vlm.v v0, (a0)
+; UNALIGNED-NEXT:    ret
   %v = load <vscale x 1 x i1>, <vscale x 1 x i1>* %ptr, align 1
   ret <vscale x 1 x i1> %v
 }
 
 define <vscale x 4 x float> @unaligned_load_nxv4f32_a1(<vscale x 4 x float>* %ptr) {
 ; CHECK-LABEL: unaligned_load_nxv4f32_a1:
 ; CHECK:       # %bb.0:
 ; CHECK-NEXT:    vl2r.v v8, (a0)
 ; CHECK-NEXT:    ret
+;
+; UNALIGNED-LABEL: unaligned_load_nxv4f32_a1:
+; UNALIGNED:       # %bb.0:
+; UNALIGNED-NEXT:    vl2re32.v v8, (a0)
+; UNALIGNED-NEXT:    ret
   %v = load <vscale x 4 x float>, <vscale x 4 x float>* %ptr, align 1
   ret <vscale x 4 x float> %v
 }
 
 define <vscale x 4 x float> @unaligned_load_nxv4f32_a2(<vscale x 4 x float>* %ptr) {
 ; CHECK-LABEL: unaligned_load_nxv4f32_a2:
 ; CHECK:       # %bb.0:
 ; CHECK-NEXT:    vl2r.v v8, (a0)
 ; CHECK-NEXT:    ret
+;
+; UNALIGNED-LABEL: unaligned_load_nxv4f32_a2:
+; UNALIGNED:       # %bb.0:
+; UNALIGNED-NEXT:    vl2re32.v v8, (a0)
+; UNALIGNED-NEXT:    ret
   %v = load <vscale x 4 x float>, <vscale x 4 x float>* %ptr, align 2
   ret <vscale x 4 x float> %v
 }
 
 define <vscale x 4 x float> @aligned_load_nxv4f32_a4(<vscale x 4 x float>* %ptr) {
 ; CHECK-LABEL: aligned_load_nxv4f32_a4:
 ; CHECK:       # %bb.0:
 ; CHECK-NEXT:    vl2re32.v v8, (a0)
 ; CHECK-NEXT:    ret
+;
+; UNALIGNED-LABEL: aligned_load_nxv4f32_a4:
+; UNALIGNED:       # %bb.0:
+; UNALIGNED-NEXT:    vl2re32.v v8, (a0)
+; UNALIGNED-NEXT:    ret
   %v = load <vscale x 4 x float>, <vscale x 4 x float>* %ptr, align 4
   ret <vscale x 4 x float> %v
 }
 
 define <vscale x 8 x half> @unaligned_load_nxv8f16_a1(<vscale x 8 x half>* %ptr) {
 ; CHECK-LABEL: unaligned_load_nxv8f16_a1:
 ; CHECK:       # %bb.0:
 ; CHECK-NEXT:    vl2r.v v8, (a0)
 ; CHECK-NEXT:    ret
+;
+; UNALIGNED-LABEL: unaligned_load_nxv8f16_a1:
+; UNALIGNED:       # %bb.0:
+; UNALIGNED-NEXT:    vl2re16.v v8, (a0)
+; UNALIGNED-NEXT:    ret
   %v = load <vscale x 8 x half>, <vscale x 8 x half>* %ptr, align 1
   ret <vscale x 8 x half> %v
 }
 
 define <vscale x 8 x half> @aligned_load_nxv8f16_a2(<vscale x 8 x half>* %ptr) {
 ; CHECK-LABEL: aligned_load_nxv8f16_a2:
 ; CHECK:       # %bb.0:
 ; CHECK-NEXT:    vl2re16.v v8, (a0)
 ; CHECK-NEXT:    ret
+;
+; UNALIGNED-LABEL: aligned_load_nxv8f16_a2:
+; UNALIGNED:       # %bb.0:
+; UNALIGNED-NEXT:    vl2re16.v v8, (a0)
+; UNALIGNED-NEXT:    ret
   %v = load <vscale x 8 x half>, <vscale x 8 x half>* %ptr, align 2
   ret <vscale x 8 x half> %v
 }
 
 define void @unaligned_store_nxv4i32_a1(<vscale x 4 x i32> %x, <vscale x 4 x i32>* %ptr) {
 ; CHECK-LABEL: unaligned_store_nxv4i32_a1:
 ; CHECK:       # %bb.0:
 ; CHECK-NEXT:    vs2r.v v8, (a0)
 ; CHECK-NEXT:    ret
+;
+; UNALIGNED-LABEL: unaligned_store_nxv4i32_a1:
+; UNALIGNED:       # %bb.0:
+; UNALIGNED-NEXT:    vs2r.v v8, (a0)
+; UNALIGNED-NEXT:    ret
   store <vscale x 4 x i32> %x, <vscale x 4 x i32>* %ptr, align 1
   ret void
 }
 
 define void @unaligned_store_nxv4i32_a2(<vscale x 4 x i32> %x, <vscale x 4 x i32>* %ptr) {
 ; CHECK-LABEL: unaligned_store_nxv4i32_a2:
 ; CHECK:       # %bb.0:
 ; CHECK-NEXT:    vs2r.v v8, (a0)
 ; CHECK-NEXT:    ret
+;
+; UNALIGNED-LABEL: unaligned_store_nxv4i32_a2:
+; UNALIGNED:       # %bb.0:
+; UNALIGNED-NEXT:    vs2r.v v8, (a0)
+; UNALIGNED-NEXT:    ret
   store <vscale x 4 x i32> %x, <vscale x 4 x i32>* %ptr, align 2
   ret void
 }
 
 define void @aligned_store_nxv4i32_a4(<vscale x 4 x i32> %x, <vscale x 4 x i32>* %ptr) {
 ; CHECK-LABEL: aligned_store_nxv4i32_a4:
 ; CHECK:       # %bb.0:
 ; CHECK-NEXT:    vs2r.v v8, (a0)
 ; CHECK-NEXT:    ret
+;
+; UNALIGNED-LABEL: aligned_store_nxv4i32_a4:
+; UNALIGNED:       # %bb.0:
+; UNALIGNED-NEXT:    vs2r.v v8, (a0)
+; UNALIGNED-NEXT:    ret
   store <vscale x 4 x i32> %x, <vscale x 4 x i32>* %ptr, align 4
   ret void
 }
 
 define void @unaligned_store_nxv1i16_a1(<vscale x 1 x i16> %x, <vscale x 1 x i16>* %ptr) {
 ; CHECK-LABEL: unaligned_store_nxv1i16_a1:
 ; CHECK:       # %bb.0:
 ; CHECK-NEXT:    vsetvli a1, zero, e8, mf4, ta, ma
 ; CHECK-NEXT:    vse8.v v8, (a0)
 ; CHECK-NEXT:    ret
+;
+; UNALIGNED-LABEL: unaligned_store_nxv1i16_a1:
+; UNALIGNED:       # %bb.0:
+; UNALIGNED-NEXT:    vsetvli a1, zero, e16, mf4, ta, ma
+; UNALIGNED-NEXT:    vse16.v v8, (a0)
+; UNALIGNED-NEXT:    ret
   store <vscale x 1 x i16> %x, <vscale x 1 x i16>* %ptr, align 1
   ret void
 }
 
 define void @aligned_store_nxv1i16_a2(<vscale x 1 x i16> %x, <vscale x 1 x i16>* %ptr) {
 ; CHECK-LABEL: aligned_store_nxv1i16_a2:
 ; CHECK:       # %bb.0:
 ; CHECK-NEXT:    vsetvli a1, zero, e16, mf4, ta, ma
 ; CHECK-NEXT:    vse16.v v8, (a0)
 ; CHECK-NEXT:    ret
+;
+; UNALIGNED-LABEL: aligned_store_nxv1i16_a2:
+; UNALIGNED:       # %bb.0:
+; UNALIGNED-NEXT:    vsetvli a1, zero, e16, mf4, ta, ma
+; UNALIGNED-NEXT:    vse16.v v8, (a0)
+; UNALIGNED-NEXT:    ret
   store <vscale x 1 x i16> %x, <vscale x 1 x i16>* %ptr, align 2
   ret void
 }