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[CIR][CIRGen][Builtin][Neon] Lower neon_vrshrd_n for s64 and u64 #1383

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Feb 22, 2025
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[CIR][CIRGen][Builtin][Neon] Lower neon_vrshrd_n for s64 and u64 #1383

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16 changes: 15 additions & 1 deletion clang/lib/CIR/CodeGen/CIRGenBuiltinAArch64.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -3836,7 +3836,21 @@ CIRGenFunction::emitAArch64BuiltinExpr(unsigned BuiltinID, const CallExpr *E,
}
case NEON::BI__builtin_neon_vrshrd_n_u64:
case NEON::BI__builtin_neon_vrshrd_n_s64: {
llvm_unreachable("NEON::BI__builtin_neon_vrshrd_n_s64 NYI");
cir::IntType IntType = BuiltinID == NEON::BI__builtin_neon_vrshrd_n_u64
? builder.getUInt64Ty()
: builder.getSInt64Ty();

const StringRef Intrinsic = BuiltinID == NEON::BI__builtin_neon_vrshrd_n_u64
? "aarch64.neon.urshl"
: "aarch64.neon.srshl";
Ops.push_back(emitScalarExpr(E->getArg(1)));
std::optional<llvm::APSInt> APSInt =
E->getArg(1)->getIntegerConstantExpr(getContext());
assert(APSInt && "Expected argument to be a constant");
int64_t SV = -APSInt->getSExtValue();
Ops[1] = builder.getSInt64(SV, getLoc(E->getExprLoc()));
return emitNeonCall(builder, {IntType, builder.getSInt64Ty()}, Ops,
Intrinsic, IntType, getLoc(E->getExprLoc()));
}
case NEON::BI__builtin_neon_vrsrad_n_u64:
case NEON::BI__builtin_neon_vrsrad_n_s64: {
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32 changes: 20 additions & 12 deletions clang/test/CIR/CodeGen/AArch64/neon.c
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Original file line number Diff line number Diff line change
Expand Up @@ -15209,12 +15209,16 @@ uint64_t test_vshrd_n_u64_3(uint64_t a) {
// LLVM: ret i64 [[SHRD_N]]
}

// NYI-LABEL: @test_vrshrd_n_s64(
// NYI: [[VRSHR_N:%.*]] = call i64 @llvm.aarch64.neon.srshl.i64(i64 %a, i64 -63)
// NYI: ret i64 [[VRSHR_N]]
// int64_t test_vrshrd_n_s64(int64_t a) {
// return (int64_t)vrshrd_n_s64(a, 63);
// }
int64_t test_vrshrd_n_s64(int64_t a) {
return (int64_t)vrshrd_n_s64(a, 63);

// CIR-LABEL: vrshrd_n_s64
// CIR: [[TMP0:%.*]] = cir.llvm.intrinsic "aarch64.neon.srshl" {{.*}}, {{.*}} : (!s64i, !s64i) -> !s64i

// LLVM-LABEL: @test_vrshrd_n_s64(
// LLVM: [[VRSHR_N:%.*]] = call i64 @llvm.aarch64.neon.srshl.i64(i64 %0, i64 -63)
// LLVM: ret i64 [[VRSHR_N]]
}

// NYI-LABEL: @test_vrshr_n_s64(
// NYI: [[TMP0:%.*]] = bitcast <1 x i64> %a to <8 x i8>
Expand All @@ -15225,12 +15229,16 @@ uint64_t test_vshrd_n_u64_3(uint64_t a) {
// return vrshr_n_s64(a, 1);
// }

// NYI-LABEL: @test_vrshrd_n_u64(
// NYI: [[VRSHR_N:%.*]] = call i64 @llvm.aarch64.neon.urshl.i64(i64 %a, i64 -63)
// NYI: ret i64 [[VRSHR_N]]
// uint64_t test_vrshrd_n_u64(uint64_t a) {
// return (uint64_t)vrshrd_n_u64(a, 63);
// }
uint64_t test_vrshrd_n_u64(uint64_t a) {
return (uint64_t)vrshrd_n_u64(a, 63);

// CIR-LABEL: vrshrd_n_u64
// CIR: [[TMP0:%.*]] = cir.llvm.intrinsic "aarch64.neon.urshl" {{.*}}, {{.*}} : (!u64i, !s64i) -> !u64i

// LLVM-LABEL: @test_vrshrd_n_u64(
// LLVM: [[VRSHR_N:%.*]] = call i64 @llvm.aarch64.neon.urshl.i64(i64 %0, i64 -63)
// LLVM: ret i64 [[VRSHR_N]]
}

// NYI-LABEL: @test_vrshr_n_u64(
// NYI: [[TMP0:%.*]] = bitcast <1 x i64> %a to <8 x i8>
Expand Down
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