llvmorg-github-actions[bot] wrote:

<!--LLVM PR SUMMARY COMMENT-->
@llvm/pr-subscribers-clangir

@llvm/pr-subscribers-clang

Author: Jiahao Guo (E00N777)

<details>
<summary>Changes</summary>

### Summary

part of : https://github.com/llvm/llvm-project/issues/185382

Lower all intrinsics in : 
https://arm-software.github.io/acle/neon_intrinsics/advsimd.html#saturating-subtract

- Vector forms (vqsub{q}_{s,u}{8,16,32,64}  - 16): added vqsub_v/vqsubq_v to 
the existing vshl_v intrinsic-call block in emitCommonNeonBuiltinExpr; 
signedness picks sqsub/uqsub via the UnsignedAlts alternates.
- Scalar forms (vqsub{b,h,s,d}_{s,u}  -  8): allow-listed in 
emitCommonNeonSISDBuiltinExpr. The 32/64-bit forms map straight to the scalar 
.i32/.i64 overloads. The 8/16-bit forms (vqsubb/vqsubh) have no scalar 
overload, so added width-guarded marshalling: scalar operands are inserted into 
lane 0 of a poison vector before the call, and a scalar result is extracted 
from lane 0 after. The size comparison makes both steps no-ops for the direct 
scalar forms and for existing reduction builtins, so no other SISD builtin is 
affected.

Assisted by : Claude Opus4.8 

---

Patch is 40.41 KiB, truncated to 20.00 KiB below, full version: 
https://github.com/llvm/llvm-project/pull/207189.diff


3 Files Affected:

- (modified) clang/lib/CIR/CodeGen/CIRGenBuiltinAArch64.cpp (+32-2) 
- (modified) clang/test/CodeGen/AArch64/neon-intrinsics.c (-326) 
- (modified) clang/test/CodeGen/AArch64/neon/subtraction.c (+368-1) 


``````````diff
diff --git a/clang/lib/CIR/CodeGen/CIRGenBuiltinAArch64.cpp 
b/clang/lib/CIR/CodeGen/CIRGenBuiltinAArch64.cpp
index 8b077620d2bab..a7321a1a54d06 100644
--- a/clang/lib/CIR/CodeGen/CIRGenBuiltinAArch64.cpp
+++ b/clang/lib/CIR/CodeGen/CIRGenBuiltinAArch64.cpp
@@ -444,6 +444,14 @@ static mlir::Value emitCommonNeonSISDBuiltinExpr(
   case NEON::BI__builtin_neon_vpmaxqd_f64:
   case NEON::BI__builtin_neon_vpmaxnms_f32:
   case NEON::BI__builtin_neon_vpmaxnmqd_f64:
+  case NEON::BI__builtin_neon_vqsubs_s32:
+  case NEON::BI__builtin_neon_vqsubs_u32:
+  case NEON::BI__builtin_neon_vqsubd_s64:
+  case NEON::BI__builtin_neon_vqsubd_u64:
+  case NEON::BI__builtin_neon_vqsubb_s8:
+  case NEON::BI__builtin_neon_vqsubb_u8:
+  case NEON::BI__builtin_neon_vqsubh_s16:
+  case NEON::BI__builtin_neon_vqsubh_u16:
     break;
   }
 
@@ -457,8 +465,28 @@ static mlir::Value emitCommonNeonSISDBuiltinExpr(
   auto [funcResTy, argTypes] = deriveNeonSISDIntrinsicOperandTypes(
       cgf, info.TypeModifier, arg0Ty, resultTy, ops);
 
-  return emitNeonCall(cgf.cgm, builder, std::move(argTypes), ops, llvmIntrName,
-                      funcResTy, loc);
+  // Scalar operands feeding a vector `argType` (e.g. vqsubb_s8, which has no
+  // scalar overload) are splatted into lane 0 of a poison vector.
+  for (unsigned i = 0, e = ops.size(); i != e; ++i) {
+    auto vecArgTy = mlir::dyn_cast<cir::VectorType>(argTypes[i]);
+    if (vecArgTy && !mlir::isa<cir::VectorType>(ops[i].getType()) &&
+        cgf.cgm.getDataLayout().getTypeSizeInBits(ops[i].getType()) !=
+            cgf.cgm.getDataLayout().getTypeSizeInBits(vecArgTy)) {
+      mlir::Value poison =
+          builder.getConstant(loc, cir::PoisonAttr::get(vecArgTy));
+      ops[i] = builder.createInsertElement(loc, poison, ops[i], /*idx=*/0);
+    }
+  }
+
+  mlir::Value result = emitNeonCall(cgf.cgm, builder, std::move(argTypes), ops,
+                                    llvmIntrName, funcResTy, loc);
+
+  // Recover a scalar result from a wider vector intrinsic result via lane 0.
+  if (auto resVecTy = mlir::dyn_cast<cir::VectorType>(result.getType());
+      resVecTy && cgf.cgm.getDataLayout().getTypeSizeInBits(resultTy) <
+                      cgf.cgm.getDataLayout().getTypeSizeInBits(resVecTy))
+    return builder.createExtractElement(loc, result, /*idx=*/0);
+  return result;
 }
 
 
//===----------------------------------------------------------------------===//
@@ -1060,6 +1088,8 @@ static mlir::Value emitCommonNeonBuiltinExpr(
                      std::string("unimplemented AArch64 builtin call: ") +
                          cgf.getContext().BuiltinInfo.getName(builtinID));
     break;
+  case NEON::BI__builtin_neon_vqsub_v:
+  case NEON::BI__builtin_neon_vqsubq_v:
   case NEON::BI__builtin_neon_vshl_v:
   case NEON::BI__builtin_neon_vshlq_v: {
     llvm::StringRef llvmIntrName =
diff --git a/clang/test/CodeGen/AArch64/neon-intrinsics.c 
b/clang/test/CodeGen/AArch64/neon-intrinsics.c
index 560191e43baec..a56b097f78c7e 100644
--- a/clang/test/CodeGen/AArch64/neon-intrinsics.c
+++ b/clang/test/CodeGen/AArch64/neon-intrinsics.c
@@ -3142,240 +3142,6 @@ uint64x2_t test_vqaddq_u64(uint64x2_t a, uint64x2_t b) {
   return vqaddq_u64(a, b);
 }
 
-// CHECK-LABEL: define dso_local <8 x i8> @test_vqsub_s8(
-// CHECK-SAME: <8 x i8> noundef [[A:%.*]], <8 x i8> noundef [[B:%.*]]) 
#[[ATTR0]] {
-// CHECK-NEXT:  [[ENTRY:.*:]]
-// CHECK-NEXT:    [[VQSUB_V_I:%.*]] = call <8 x i8> 
@llvm.aarch64.neon.sqsub.v8i8(<8 x i8> [[A]], <8 x i8> [[B]])
-// CHECK-NEXT:    ret <8 x i8> [[VQSUB_V_I]]
-//
-int8x8_t test_vqsub_s8(int8x8_t a, int8x8_t b) {
-  return vqsub_s8(a, b);
-}
-
-// CHECK-LABEL: define dso_local <4 x i16> @test_vqsub_s16(
-// CHECK-SAME: <4 x i16> noundef [[A:%.*]], <4 x i16> noundef [[B:%.*]]) 
#[[ATTR0]] {
-// CHECK-NEXT:  [[ENTRY:.*:]]
-// CHECK-NEXT:    [[TMP0:%.*]] = bitcast <4 x i16> [[A]] to <8 x i8>
-// CHECK-NEXT:    [[TMP1:%.*]] = bitcast <4 x i16> [[B]] to <8 x i8>
-// CHECK-NEXT:    [[VQSUB_V_I:%.*]] = bitcast <8 x i8> [[TMP0]] to <4 x i16>
-// CHECK-NEXT:    [[VQSUB_V1_I:%.*]] = bitcast <8 x i8> [[TMP1]] to <4 x i16>
-// CHECK-NEXT:    [[VQSUB_V2_I:%.*]] = call <4 x i16> 
@llvm.aarch64.neon.sqsub.v4i16(<4 x i16> [[VQSUB_V_I]], <4 x i16> 
[[VQSUB_V1_I]])
-// CHECK-NEXT:    [[VQSUB_V3_I:%.*]] = bitcast <4 x i16> [[VQSUB_V2_I]] to <8 
x i8>
-// CHECK-NEXT:    [[TMP2:%.*]] = bitcast <8 x i8> [[VQSUB_V3_I]] to <4 x i16>
-// CHECK-NEXT:    ret <4 x i16> [[TMP2]]
-//
-int16x4_t test_vqsub_s16(int16x4_t a, int16x4_t b) {
-  return vqsub_s16(a, b);
-}
-
-// CHECK-LABEL: define dso_local <2 x i32> @test_vqsub_s32(
-// CHECK-SAME: <2 x i32> noundef [[A:%.*]], <2 x i32> noundef [[B:%.*]]) 
#[[ATTR0]] {
-// CHECK-NEXT:  [[ENTRY:.*:]]
-// CHECK-NEXT:    [[TMP0:%.*]] = bitcast <2 x i32> [[A]] to <8 x i8>
-// CHECK-NEXT:    [[TMP1:%.*]] = bitcast <2 x i32> [[B]] to <8 x i8>
-// CHECK-NEXT:    [[VQSUB_V_I:%.*]] = bitcast <8 x i8> [[TMP0]] to <2 x i32>
-// CHECK-NEXT:    [[VQSUB_V1_I:%.*]] = bitcast <8 x i8> [[TMP1]] to <2 x i32>
-// CHECK-NEXT:    [[VQSUB_V2_I:%.*]] = call <2 x i32> 
@llvm.aarch64.neon.sqsub.v2i32(<2 x i32> [[VQSUB_V_I]], <2 x i32> 
[[VQSUB_V1_I]])
-// CHECK-NEXT:    [[VQSUB_V3_I:%.*]] = bitcast <2 x i32> [[VQSUB_V2_I]] to <8 
x i8>
-// CHECK-NEXT:    [[TMP2:%.*]] = bitcast <8 x i8> [[VQSUB_V3_I]] to <2 x i32>
-// CHECK-NEXT:    ret <2 x i32> [[TMP2]]
-//
-int32x2_t test_vqsub_s32(int32x2_t a, int32x2_t b) {
-  return vqsub_s32(a, b);
-}
-
-// CHECK-LABEL: define dso_local <1 x i64> @test_vqsub_s64(
-// CHECK-SAME: <1 x i64> noundef [[A:%.*]], <1 x i64> noundef [[B:%.*]]) 
#[[ATTR0]] {
-// CHECK-NEXT:  [[ENTRY:.*:]]
-// CHECK-NEXT:    [[TMP0:%.*]] = bitcast <1 x i64> [[A]] to <8 x i8>
-// CHECK-NEXT:    [[TMP1:%.*]] = bitcast <1 x i64> [[B]] to <8 x i8>
-// CHECK-NEXT:    [[VQSUB_V_I:%.*]] = bitcast <8 x i8> [[TMP0]] to <1 x i64>
-// CHECK-NEXT:    [[VQSUB_V1_I:%.*]] = bitcast <8 x i8> [[TMP1]] to <1 x i64>
-// CHECK-NEXT:    [[VQSUB_V2_I:%.*]] = call <1 x i64> 
@llvm.aarch64.neon.sqsub.v1i64(<1 x i64> [[VQSUB_V_I]], <1 x i64> 
[[VQSUB_V1_I]])
-// CHECK-NEXT:    [[VQSUB_V3_I:%.*]] = bitcast <1 x i64> [[VQSUB_V2_I]] to <8 
x i8>
-// CHECK-NEXT:    [[TMP2:%.*]] = bitcast <8 x i8> [[VQSUB_V3_I]] to i64
-// CHECK-NEXT:    [[REF_TMP_I_SROA_0_0_VEC_INSERT:%.*]] = insertelement <1 x 
i64> undef, i64 [[TMP2]], i32 0
-// CHECK-NEXT:    ret <1 x i64> [[REF_TMP_I_SROA_0_0_VEC_INSERT]]
-//
-int64x1_t test_vqsub_s64(int64x1_t a, int64x1_t b) {
-  return vqsub_s64(a, b);
-}
-
-// CHECK-LABEL: define dso_local <8 x i8> @test_vqsub_u8(
-// CHECK-SAME: <8 x i8> noundef [[A:%.*]], <8 x i8> noundef [[B:%.*]]) 
#[[ATTR0]] {
-// CHECK-NEXT:  [[ENTRY:.*:]]
-// CHECK-NEXT:    [[VQSUB_V_I:%.*]] = call <8 x i8> 
@llvm.aarch64.neon.uqsub.v8i8(<8 x i8> [[A]], <8 x i8> [[B]])
-// CHECK-NEXT:    ret <8 x i8> [[VQSUB_V_I]]
-//
-uint8x8_t test_vqsub_u8(uint8x8_t a, uint8x8_t b) {
-  return vqsub_u8(a, b);
-}
-
-// CHECK-LABEL: define dso_local <4 x i16> @test_vqsub_u16(
-// CHECK-SAME: <4 x i16> noundef [[A:%.*]], <4 x i16> noundef [[B:%.*]]) 
#[[ATTR0]] {
-// CHECK-NEXT:  [[ENTRY:.*:]]
-// CHECK-NEXT:    [[TMP0:%.*]] = bitcast <4 x i16> [[A]] to <8 x i8>
-// CHECK-NEXT:    [[TMP1:%.*]] = bitcast <4 x i16> [[B]] to <8 x i8>
-// CHECK-NEXT:    [[VQSUB_V_I:%.*]] = bitcast <8 x i8> [[TMP0]] to <4 x i16>
-// CHECK-NEXT:    [[VQSUB_V1_I:%.*]] = bitcast <8 x i8> [[TMP1]] to <4 x i16>
-// CHECK-NEXT:    [[VQSUB_V2_I:%.*]] = call <4 x i16> 
@llvm.aarch64.neon.uqsub.v4i16(<4 x i16> [[VQSUB_V_I]], <4 x i16> 
[[VQSUB_V1_I]])
-// CHECK-NEXT:    [[VQSUB_V3_I:%.*]] = bitcast <4 x i16> [[VQSUB_V2_I]] to <8 
x i8>
-// CHECK-NEXT:    [[TMP2:%.*]] = bitcast <8 x i8> [[VQSUB_V3_I]] to <4 x i16>
-// CHECK-NEXT:    ret <4 x i16> [[TMP2]]
-//
-uint16x4_t test_vqsub_u16(uint16x4_t a, uint16x4_t b) {
-  return vqsub_u16(a, b);
-}
-
-// CHECK-LABEL: define dso_local <2 x i32> @test_vqsub_u32(
-// CHECK-SAME: <2 x i32> noundef [[A:%.*]], <2 x i32> noundef [[B:%.*]]) 
#[[ATTR0]] {
-// CHECK-NEXT:  [[ENTRY:.*:]]
-// CHECK-NEXT:    [[TMP0:%.*]] = bitcast <2 x i32> [[A]] to <8 x i8>
-// CHECK-NEXT:    [[TMP1:%.*]] = bitcast <2 x i32> [[B]] to <8 x i8>
-// CHECK-NEXT:    [[VQSUB_V_I:%.*]] = bitcast <8 x i8> [[TMP0]] to <2 x i32>
-// CHECK-NEXT:    [[VQSUB_V1_I:%.*]] = bitcast <8 x i8> [[TMP1]] to <2 x i32>
-// CHECK-NEXT:    [[VQSUB_V2_I:%.*]] = call <2 x i32> 
@llvm.aarch64.neon.uqsub.v2i32(<2 x i32> [[VQSUB_V_I]], <2 x i32> 
[[VQSUB_V1_I]])
-// CHECK-NEXT:    [[VQSUB_V3_I:%.*]] = bitcast <2 x i32> [[VQSUB_V2_I]] to <8 
x i8>
-// CHECK-NEXT:    [[TMP2:%.*]] = bitcast <8 x i8> [[VQSUB_V3_I]] to <2 x i32>
-// CHECK-NEXT:    ret <2 x i32> [[TMP2]]
-//
-uint32x2_t test_vqsub_u32(uint32x2_t a, uint32x2_t b) {
-  return vqsub_u32(a, b);
-}
-
-// CHECK-LABEL: define dso_local <1 x i64> @test_vqsub_u64(
-// CHECK-SAME: <1 x i64> noundef [[A:%.*]], <1 x i64> noundef [[B:%.*]]) 
#[[ATTR0]] {
-// CHECK-NEXT:  [[ENTRY:.*:]]
-// CHECK-NEXT:    [[TMP0:%.*]] = bitcast <1 x i64> [[A]] to <8 x i8>
-// CHECK-NEXT:    [[TMP1:%.*]] = bitcast <1 x i64> [[B]] to <8 x i8>
-// CHECK-NEXT:    [[VQSUB_V_I:%.*]] = bitcast <8 x i8> [[TMP0]] to <1 x i64>
-// CHECK-NEXT:    [[VQSUB_V1_I:%.*]] = bitcast <8 x i8> [[TMP1]] to <1 x i64>
-// CHECK-NEXT:    [[VQSUB_V2_I:%.*]] = call <1 x i64> 
@llvm.aarch64.neon.uqsub.v1i64(<1 x i64> [[VQSUB_V_I]], <1 x i64> 
[[VQSUB_V1_I]])
-// CHECK-NEXT:    [[VQSUB_V3_I:%.*]] = bitcast <1 x i64> [[VQSUB_V2_I]] to <8 
x i8>
-// CHECK-NEXT:    [[TMP2:%.*]] = bitcast <8 x i8> [[VQSUB_V3_I]] to i64
-// CHECK-NEXT:    [[REF_TMP_I_SROA_0_0_VEC_INSERT:%.*]] = insertelement <1 x 
i64> undef, i64 [[TMP2]], i32 0
-// CHECK-NEXT:    ret <1 x i64> [[REF_TMP_I_SROA_0_0_VEC_INSERT]]
-//
-uint64x1_t test_vqsub_u64(uint64x1_t a, uint64x1_t b) {
-  return vqsub_u64(a, b);
-}
-
-// CHECK-LABEL: define dso_local <16 x i8> @test_vqsubq_s8(
-// CHECK-SAME: <16 x i8> noundef [[A:%.*]], <16 x i8> noundef [[B:%.*]]) 
#[[ATTR0]] {
-// CHECK-NEXT:  [[ENTRY:.*:]]
-// CHECK-NEXT:    [[VQSUBQ_V_I:%.*]] = call <16 x i8> 
@llvm.aarch64.neon.sqsub.v16i8(<16 x i8> [[A]], <16 x i8> [[B]])
-// CHECK-NEXT:    ret <16 x i8> [[VQSUBQ_V_I]]
-//
-int8x16_t test_vqsubq_s8(int8x16_t a, int8x16_t b) {
-  return vqsubq_s8(a, b);
-}
-
-// CHECK-LABEL: define dso_local <8 x i16> @test_vqsubq_s16(
-// CHECK-SAME: <8 x i16> noundef [[A:%.*]], <8 x i16> noundef [[B:%.*]]) 
#[[ATTR0]] {
-// CHECK-NEXT:  [[ENTRY:.*:]]
-// CHECK-NEXT:    [[TMP0:%.*]] = bitcast <8 x i16> [[A]] to <16 x i8>
-// CHECK-NEXT:    [[TMP1:%.*]] = bitcast <8 x i16> [[B]] to <16 x i8>
-// CHECK-NEXT:    [[VQSUBQ_V_I:%.*]] = bitcast <16 x i8> [[TMP0]] to <8 x i16>
-// CHECK-NEXT:    [[VQSUBQ_V1_I:%.*]] = bitcast <16 x i8> [[TMP1]] to <8 x i16>
-// CHECK-NEXT:    [[VQSUBQ_V2_I:%.*]] = call <8 x i16> 
@llvm.aarch64.neon.sqsub.v8i16(<8 x i16> [[VQSUBQ_V_I]], <8 x i16> 
[[VQSUBQ_V1_I]])
-// CHECK-NEXT:    [[VQSUBQ_V3_I:%.*]] = bitcast <8 x i16> [[VQSUBQ_V2_I]] to 
<16 x i8>
-// CHECK-NEXT:    [[TMP2:%.*]] = bitcast <16 x i8> [[VQSUBQ_V3_I]] to <8 x i16>
-// CHECK-NEXT:    ret <8 x i16> [[TMP2]]
-//
-int16x8_t test_vqsubq_s16(int16x8_t a, int16x8_t b) {
-  return vqsubq_s16(a, b);
-}
-
-// CHECK-LABEL: define dso_local <4 x i32> @test_vqsubq_s32(
-// CHECK-SAME: <4 x i32> noundef [[A:%.*]], <4 x i32> noundef [[B:%.*]]) 
#[[ATTR0]] {
-// CHECK-NEXT:  [[ENTRY:.*:]]
-// CHECK-NEXT:    [[TMP0:%.*]] = bitcast <4 x i32> [[A]] to <16 x i8>
-// CHECK-NEXT:    [[TMP1:%.*]] = bitcast <4 x i32> [[B]] to <16 x i8>
-// CHECK-NEXT:    [[VQSUBQ_V_I:%.*]] = bitcast <16 x i8> [[TMP0]] to <4 x i32>
-// CHECK-NEXT:    [[VQSUBQ_V1_I:%.*]] = bitcast <16 x i8> [[TMP1]] to <4 x i32>
-// CHECK-NEXT:    [[VQSUBQ_V2_I:%.*]] = call <4 x i32> 
@llvm.aarch64.neon.sqsub.v4i32(<4 x i32> [[VQSUBQ_V_I]], <4 x i32> 
[[VQSUBQ_V1_I]])
-// CHECK-NEXT:    [[VQSUBQ_V3_I:%.*]] = bitcast <4 x i32> [[VQSUBQ_V2_I]] to 
<16 x i8>
-// CHECK-NEXT:    [[TMP2:%.*]] = bitcast <16 x i8> [[VQSUBQ_V3_I]] to <4 x i32>
-// CHECK-NEXT:    ret <4 x i32> [[TMP2]]
-//
-int32x4_t test_vqsubq_s32(int32x4_t a, int32x4_t b) {
-  return vqsubq_s32(a, b);
-}
-
-// CHECK-LABEL: define dso_local <2 x i64> @test_vqsubq_s64(
-// CHECK-SAME: <2 x i64> noundef [[A:%.*]], <2 x i64> noundef [[B:%.*]]) 
#[[ATTR0]] {
-// CHECK-NEXT:  [[ENTRY:.*:]]
-// CHECK-NEXT:    [[TMP0:%.*]] = bitcast <2 x i64> [[A]] to <16 x i8>
-// CHECK-NEXT:    [[TMP1:%.*]] = bitcast <2 x i64> [[B]] to <16 x i8>
-// CHECK-NEXT:    [[VQSUBQ_V_I:%.*]] = bitcast <16 x i8> [[TMP0]] to <2 x i64>
-// CHECK-NEXT:    [[VQSUBQ_V1_I:%.*]] = bitcast <16 x i8> [[TMP1]] to <2 x i64>
-// CHECK-NEXT:    [[VQSUBQ_V2_I:%.*]] = call <2 x i64> 
@llvm.aarch64.neon.sqsub.v2i64(<2 x i64> [[VQSUBQ_V_I]], <2 x i64> 
[[VQSUBQ_V1_I]])
-// CHECK-NEXT:    [[VQSUBQ_V3_I:%.*]] = bitcast <2 x i64> [[VQSUBQ_V2_I]] to 
<16 x i8>
-// CHECK-NEXT:    [[TMP2:%.*]] = bitcast <16 x i8> [[VQSUBQ_V3_I]] to <2 x i64>
-// CHECK-NEXT:    ret <2 x i64> [[TMP2]]
-//
-int64x2_t test_vqsubq_s64(int64x2_t a, int64x2_t b) {
-  return vqsubq_s64(a, b);
-}
-
-// CHECK-LABEL: define dso_local <16 x i8> @test_vqsubq_u8(
-// CHECK-SAME: <16 x i8> noundef [[A:%.*]], <16 x i8> noundef [[B:%.*]]) 
#[[ATTR0]] {
-// CHECK-NEXT:  [[ENTRY:.*:]]
-// CHECK-NEXT:    [[VQSUBQ_V_I:%.*]] = call <16 x i8> 
@llvm.aarch64.neon.uqsub.v16i8(<16 x i8> [[A]], <16 x i8> [[B]])
-// CHECK-NEXT:    ret <16 x i8> [[VQSUBQ_V_I]]
-//
-uint8x16_t test_vqsubq_u8(uint8x16_t a, uint8x16_t b) {
-  return vqsubq_u8(a, b);
-}
-
-// CHECK-LABEL: define dso_local <8 x i16> @test_vqsubq_u16(
-// CHECK-SAME: <8 x i16> noundef [[A:%.*]], <8 x i16> noundef [[B:%.*]]) 
#[[ATTR0]] {
-// CHECK-NEXT:  [[ENTRY:.*:]]
-// CHECK-NEXT:    [[TMP0:%.*]] = bitcast <8 x i16> [[A]] to <16 x i8>
-// CHECK-NEXT:    [[TMP1:%.*]] = bitcast <8 x i16> [[B]] to <16 x i8>
-// CHECK-NEXT:    [[VQSUBQ_V_I:%.*]] = bitcast <16 x i8> [[TMP0]] to <8 x i16>
-// CHECK-NEXT:    [[VQSUBQ_V1_I:%.*]] = bitcast <16 x i8> [[TMP1]] to <8 x i16>
-// CHECK-NEXT:    [[VQSUBQ_V2_I:%.*]] = call <8 x i16> 
@llvm.aarch64.neon.uqsub.v8i16(<8 x i16> [[VQSUBQ_V_I]], <8 x i16> 
[[VQSUBQ_V1_I]])
-// CHECK-NEXT:    [[VQSUBQ_V3_I:%.*]] = bitcast <8 x i16> [[VQSUBQ_V2_I]] to 
<16 x i8>
-// CHECK-NEXT:    [[TMP2:%.*]] = bitcast <16 x i8> [[VQSUBQ_V3_I]] to <8 x i16>
-// CHECK-NEXT:    ret <8 x i16> [[TMP2]]
-//
-uint16x8_t test_vqsubq_u16(uint16x8_t a, uint16x8_t b) {
-  return vqsubq_u16(a, b);
-}
-
-// CHECK-LABEL: define dso_local <4 x i32> @test_vqsubq_u32(
-// CHECK-SAME: <4 x i32> noundef [[A:%.*]], <4 x i32> noundef [[B:%.*]]) 
#[[ATTR0]] {
-// CHECK-NEXT:  [[ENTRY:.*:]]
-// CHECK-NEXT:    [[TMP0:%.*]] = bitcast <4 x i32> [[A]] to <16 x i8>
-// CHECK-NEXT:    [[TMP1:%.*]] = bitcast <4 x i32> [[B]] to <16 x i8>
-// CHECK-NEXT:    [[VQSUBQ_V_I:%.*]] = bitcast <16 x i8> [[TMP0]] to <4 x i32>
-// CHECK-NEXT:    [[VQSUBQ_V1_I:%.*]] = bitcast <16 x i8> [[TMP1]] to <4 x i32>
-// CHECK-NEXT:    [[VQSUBQ_V2_I:%.*]] = call <4 x i32> 
@llvm.aarch64.neon.uqsub.v4i32(<4 x i32> [[VQSUBQ_V_I]], <4 x i32> 
[[VQSUBQ_V1_I]])
-// CHECK-NEXT:    [[VQSUBQ_V3_I:%.*]] = bitcast <4 x i32> [[VQSUBQ_V2_I]] to 
<16 x i8>
-// CHECK-NEXT:    [[TMP2:%.*]] = bitcast <16 x i8> [[VQSUBQ_V3_I]] to <4 x i32>
-// CHECK-NEXT:    ret <4 x i32> [[TMP2]]
-//
-uint32x4_t test_vqsubq_u32(uint32x4_t a, uint32x4_t b) {
-  return vqsubq_u32(a, b);
-}
-
-// CHECK-LABEL: define dso_local <2 x i64> @test_vqsubq_u64(
-// CHECK-SAME: <2 x i64> noundef [[A:%.*]], <2 x i64> noundef [[B:%.*]]) 
#[[ATTR0]] {
-// CHECK-NEXT:  [[ENTRY:.*:]]
-// CHECK-NEXT:    [[TMP0:%.*]] = bitcast <2 x i64> [[A]] to <16 x i8>
-// CHECK-NEXT:    [[TMP1:%.*]] = bitcast <2 x i64> [[B]] to <16 x i8>
-// CHECK-NEXT:    [[VQSUBQ_V_I:%.*]] = bitcast <16 x i8> [[TMP0]] to <2 x i64>
-// CHECK-NEXT:    [[VQSUBQ_V1_I:%.*]] = bitcast <16 x i8> [[TMP1]] to <2 x i64>
-// CHECK-NEXT:    [[VQSUBQ_V2_I:%.*]] = call <2 x i64> 
@llvm.aarch64.neon.uqsub.v2i64(<2 x i64> [[VQSUBQ_V_I]], <2 x i64> 
[[VQSUBQ_V1_I]])
-// CHECK-NEXT:    [[VQSUBQ_V3_I:%.*]] = bitcast <2 x i64> [[VQSUBQ_V2_I]] to 
<16 x i8>
-// CHECK-NEXT:    [[TMP2:%.*]] = bitcast <16 x i8> [[VQSUBQ_V3_I]] to <2 x i64>
-// CHECK-NEXT:    ret <2 x i64> [[TMP2]]
-//
-uint64x2_t test_vqsubq_u64(uint64x2_t a, uint64x2_t b) {
-  return vqsubq_u64(a, b);
-}
-
 // CHECK-LABEL: define dso_local <8 x i8> @test_vqshl_s8(
 // CHECK-SAME: <8 x i8> noundef [[A:%.*]], <8 x i8> noundef [[B:%.*]]) 
#[[ATTR0]] {
 // CHECK-NEXT:  [[ENTRY:.*:]]
@@ -7047,98 +6813,6 @@ uint64_t test_vqaddd_u64(uint64_t a, uint64_t b) {
   return vqaddd_u64(a, b);
 }
 
-// CHECK-LABEL: define dso_local i8 @test_vqsubb_s8(
-// CHECK-SAME: i8 noundef [[A:%.*]], i8 noundef [[B:%.*]]) #[[ATTR0]] {
-// CHECK-NEXT:  [[ENTRY:.*:]]
-// CHECK-NEXT:    [[TMP0:%.*]] = insertelement <8 x i8> poison, i8 [[A]], i64 0
-// CHECK-NEXT:    [[TMP1:%.*]] = insertelement <8 x i8> poison, i8 [[B]], i64 0
-// CHECK-NEXT:    [[VQSUBB_S8_I:%.*]] = call <8 x i8> 
@llvm.aarch64.neon.sqsub.v8i8(<8 x i8> [[TMP0]], <8 x i8> [[TMP1]])
-// CHECK-NEXT:    [[TMP2:%.*]] = extractelement <8 x i8> [[VQSUBB_S8_I]], i64 0
-// CHECK-NEXT:    ret i8 [[TMP2]]
-//
-int8_t test_vqsubb_s8(int8_t a, int8_t b) {
-  return vqsubb_s8(a, b);
-}
-
-// CHECK-LABEL: define dso_local i16 @test_vqsubh_s16(
-// CHECK-SAME: i16 noundef [[A:%.*]], i16 noundef [[B:%.*]]) #[[ATTR0]] {
-// CHECK-NEXT:  [[ENTRY:.*:]]
-// CHECK-NEXT:    [[TMP0:%.*]] = insertelement <4 x i16> poison, i16 [[A]], 
i64 0
-// CHECK-NEXT:    [[TMP1:%.*]] = insertelement <4 x i16> poison, i16 [[B]], 
i64 0
-// CHECK-NEXT:    [[VQSUBH_S16_I:%.*]] = call <4 x i16> 
@llvm.aarch64.neon.sqsub.v4i16(<4 x i16> [[TMP0]], <4 x i16> [[TMP1]])
-// CHECK-NEXT:    [[TMP2:%.*]] = extractelement <4 x i16> [[VQSUBH_S16_I]], 
i64 0
-// CHECK-NEXT:    ret i16 [[TMP2]]
-//
-int16_t test_vqsubh_s16(int16_t a, int16_t b) {
-  return vqsubh_s16(a, b);
-}
-
-// CHECK-LABEL: define dso_local i32 @test_vqsubs_s32(
-// CHECK-SAME: i32 noundef [[A:%.*]], i32 noundef [[B:%.*]]) #[[ATTR0]] {
-// CHECK-NEXT:  [[ENTRY:.*:]]
-// CHECK-NEXT:    [[VQSUBS_S32_I:%.*]] = call i32 
@llvm.aarch64.neon.sqsub.i32(i32 [[A]], i32 [[B]])
-// CHECK-NEXT:    ret i32 [[VQSUBS_S32_I]]
-//
-int32_t test_vqsubs_s32(int32_t a, int32_t b) {
-  return vqsubs_s32(a, b);
-}
-
-// CHECK-LABEL: define dso_local i64 @test_vqsubd_s64(
-// CHECK-SAME: i64 noundef [[A:%.*]], i64 noundef [[B:%.*]]) #[[ATTR0]] {
-// CHECK-NEXT:  [[ENTRY:.*:]]
-// CHECK-NEXT:    [[VQSUBD_S64_I:%.*]] = call i64 
@llvm.aarch64.neon.sqsub.i64(i64 [[A]], i64 [[B]])
-// CHECK-NEXT:    ret i64 [[VQSUBD_S64_I]]
-//
-int64_t test_vqsubd_s64(int64_t a, int64_t b) {
-  return vqsubd_s64(a, b);
-}
-
-// CHECK-LABEL: define dso_local i8 @test_vqsubb_u8(
-// CHECK-SAME: i8 noundef [[A:%.*]], i8 noundef [[B:%.*]]) #[[ATTR0]] {
-// CHECK-NEXT:  [[ENTRY:.*:]]
-// CHECK-NEXT:    [[TMP0:%.*]] = insertelement <8 x i8> poison, i8 [[A]], i64 0
-// CHECK-NEXT:    [[TMP1:%.*]] = insertelement <8 x i8> poison, i8 [[B]], i64 0
-// CHECK-NEXT:    [[VQSUBB_U8_I:%.*]] = call <8 x i8> 
@llvm.aarch64.neon.uqsub.v8i8(<8 x i8> [[TMP0]], <8 x i8> [[TMP1]])
-// CHECK-NEXT:    [[TMP2:%.*]] = extractelement <8 x i8> [[VQSUBB_U8_I]], i64 0
-// CHECK-NEXT:    ret i8 [[TMP2]]
-//
-uint8_t test_vqsubb_u8(uint8_t a, uint8_t b) {
-  return vqsubb_u8(a, b);
-}
-
-// CHECK-LABEL: define dso_local i16 @test_vqsubh_u16(
-// CHECK-SAME: i16 noundef [[A:%.*]], i16 noundef [[B:%.*]]) #[[ATTR0]] {
-// CHECK-NEXT:  [[ENTRY:.*:]]
-// CHECK-NEXT:    [[TMP0:%.*]] = insertelement <4 x i16> poison, i16 [[A]], 
i64 0
-// CHECK-NEXT:    [[TMP1:%.*]] = insertelement <4 x i16> poison, i16 [[B]], 
i64 0
-// CHECK-NEXT:    [[VQSUBH_U16_I:%.*]] = call <4 x i16> 
@llvm.aarch64.neon.uqsub.v4i16(<4 x i16> [[TMP0]], <4 x i16> [[TMP1]])
-// CHECK-NEXT:    [[TMP2:%.*]] = extractelement <4 x i16> [[VQSUBH_U16_I]], 
i64 0
-// CHECK-NEXT:    ret i16 [[TMP2]]
-//
-uint16_t test_vqsubh_u16(uint16_t a, uint16_t b) {
-  return vqsubh_u16(a, b);
-}
-
-// CHECK-LABEL: define dso_local i32 @test_vqsubs_u32(
-// CHECK-SAME: i32 noundef [[A:%.*]], i32 noundef [[B:%.*]]) #[[ATTR0]] {
-// CHECK-NEXT:  [[ENTRY:.*:]]
-// CHECK-NEXT:    [[VQSUBS_U32_I:%.*]] = call i32 
@llvm.aarch64.neon.uqsub.i32(i32 [[A]], i32 [[B]])
-// CHECK-NEXT:    ret i32 [[VQSUBS_U32_I]]
-//
-uint32_t test_vqsubs_u32(uint32_t a, uint32_t b) {
-  return vqsubs_u32(a, b);
-}
-
-// CHECK-LABEL: define dso_local i64 @test_vqsubd_u64(
-// CHECK-SAME: i64 noundef [[A:%.*]], i64 noundef [[B:%.*]]) #[[ATTR0]] {
-// CHECK-NEXT:  [[ENTRY:.*:]]
-// CHECK...
[truncated]

``````````

</details>


https://github.com/llvm/llvm-project/pull/207189
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