r216558 - Allow __fp16 as a function arg or return type for AArch64
Jiangning Liu
liujiangning1 at gmail.com
Wed Aug 27 22:13:07 PDT 2014
Hi Oliver,
Here comes a small test case reproducing the failure.
$ cat bb.c
float32x4_t result;
arg1 = vcombine_f16(vcreate_f16(UINT64_C(0x3f0aa8903edf40f8)),
vcreate_f16(UINT64_C(0x3f614f463e8b06ca)));
result = vreinterpretq_f32_f16(arg1);
}
$ clang -O0 -target arm64-linux-gnueabi -c bb.c
fatal error: error in backend: Cannot select: 0x29bf1f8: v4f32 = bitcast
0x29be608 [ORD=34] [ID=25]
0x29be608: v8f16 = concat_vectors 0x29be3f8, 0x29bc300 [ORD=27] [ID=24]
0x29be3f8: v4f16,ch = load 0x29bded0, 0x29bdfd8,
0x29bb7a8<LD8[%__p0.addr.i6]> [ORD=25] [ID=23]
0x29bdfd8: i64 = FrameIndex<2> [ID=8]
0x29bb7a8: i64 = undef [ID=3]
0x29bc300: v4f16 = bitcast 0x29bbee0 [ORD=20] [ID=17]
0x29bbee0: i64 = Constant<4567018660245997258> [ID=5]
In function: dotests_2970
clang-3.5: error: clang frontend command failed with exit code 70 (use -v
to see invocation)
clang version 3.6.0 (216557)
Target: arm64--linux-gnueabi
Thread model: posix
clang-3.5: note: diagnostic msg: PLEASE submit a bug report to
http://llvm.org/bugs/ and include the crash backtrace, preprocessed source,
and associated run script.
clang-3.5: note: diagnostic msg:
********************
PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang-3.5: note: diagnostic msg: /tmp/bb-a66a58.c
clang-3.5: note: diagnostic msg: /tmp/bb-a66a58.sh
clang-3.5: note: diagnostic msg:
********************
Thanks,
-Jiangning
2014-08-28 12:53 GMT+08:00 Jiangning Liu <liujiangning1 at gmail.com>:
> This commit triggered assertion failure
>
> fatal error: error in backend: Cannot select: 0xd785e58: v4f32 = bitcast
> 0xcca5910 [ORD=59] [ID=45]
> 0xcca5910: v8f16,ch = load 0xc1d09d0, 0xbfff270, 0xc1be168<LD16[%arg1]>
> [ORD=56] [ID=44]
> 0xbfff270: i64 = FrameIndex<9> [ID=15]
> 0xc1be168: i64 = undef [ID=3]
> In function: dotests_2970
> clang-3.6: error: clang frontend command failed with exit code 70 (use -v
> to see invocation)
> clang version 3.6.0 (216641)
> Target: arm64--linux-gnueabi
> Thread model: posix
> clang-3.6: note: diagnostic msg: PLEASE submit a bug report to
> http://llvm.org/bugs/ and include the crash backtrace, preprocessed
> source, and associated run script.
>
> And this is blocking our regression test.
>
> Thanks,
> -Jiangning
>
>
> 2014-08-28 0:31 GMT+08:00 Oliver Stannard <oliver.stannard at arm.com>:
>
> Author: olista01
>> Date: Wed Aug 27 11:31:57 2014
>> New Revision: 216558
>>
>> URL: http://llvm.org/viewvc/llvm-project?rev=216558&view=rev
>> Log:
>> Allow __fp16 as a function arg or return type for AArch64
>>
>> ACLE 2.0 allows __fp16 to be used as a function argument or return
>> type. This enables this for AArch64.
>>
>> This also fixes an existing bug that causes clang to not allow
>> homogeneous floating-point aggregates with a base type of __fp16. This
>> is valid for AAPCS64, but not for AAPCS-VFP.
>>
>>
>> Modified:
>> cfe/trunk/include/clang/Basic/LangOptions.def
>> cfe/trunk/include/clang/Driver/CC1Options.td
>> cfe/trunk/lib/CodeGen/CGExprConstant.cpp
>> cfe/trunk/lib/CodeGen/CGExprScalar.cpp
>> cfe/trunk/lib/CodeGen/CodeGenTypes.cpp
>> cfe/trunk/lib/CodeGen/TargetInfo.cpp
>> cfe/trunk/lib/Driver/Tools.cpp
>> cfe/trunk/lib/Frontend/CompilerInvocation.cpp
>> cfe/trunk/lib/Sema/SemaType.cpp
>> cfe/trunk/test/CodeGen/arm64-aapcs-arguments.c
>>
>> Modified: cfe/trunk/include/clang/Basic/LangOptions.def
>> URL:
>> http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Basic/LangOptions.def?rev=216558&r1=216557&r2=216558&view=diff
>>
>> ==============================================================================
>> --- cfe/trunk/include/clang/Basic/LangOptions.def (original)
>> +++ cfe/trunk/include/clang/Basic/LangOptions.def Wed Aug 27 11:31:57 2014
>> @@ -128,6 +128,7 @@ LANGOPT(ShortEnums , 1, 0, "short
>> LANGOPT(OpenCL , 1, 0, "OpenCL")
>> LANGOPT(OpenCLVersion , 32, 0, "OpenCL version")
>> LANGOPT(NativeHalfType , 1, 0, "Native half type support")
>> +LANGOPT(HalfArgsAndReturns, 1, 0, "half args and returns")
>> LANGOPT(CUDA , 1, 0, "CUDA")
>> LANGOPT(OpenMP , 1, 0, "OpenMP support")
>>
>>
>> Modified: cfe/trunk/include/clang/Driver/CC1Options.td
>> URL:
>> http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Driver/CC1Options.td?rev=216558&r1=216557&r2=216558&view=diff
>>
>> ==============================================================================
>> --- cfe/trunk/include/clang/Driver/CC1Options.td (original)
>> +++ cfe/trunk/include/clang/Driver/CC1Options.td Wed Aug 27 11:31:57 2014
>> @@ -511,6 +511,8 @@ def vtordisp_mode_EQ : Joined<["-"], "vt
>> HelpText<"Control vtordisp placement on win32 targets">;
>> def fno_rtti_data : Flag<["-"], "fno-rtti-data">,
>> HelpText<"Control emission of RTTI data">;
>> +def fallow_half_arguments_and_returns : Flag<["-"],
>> "fallow-half-arguments-and-returns">,
>> + HelpText<"Allow function arguments and returns of type half">;
>>
>>
>> //===----------------------------------------------------------------------===//
>> // Header Search Options
>>
>> Modified: cfe/trunk/lib/CodeGen/CGExprConstant.cpp
>> URL:
>> http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGExprConstant.cpp?rev=216558&r1=216557&r2=216558&view=diff
>>
>> ==============================================================================
>> --- cfe/trunk/lib/CodeGen/CGExprConstant.cpp (original)
>> +++ cfe/trunk/lib/CodeGen/CGExprConstant.cpp Wed Aug 27 11:31:57 2014
>> @@ -1132,7 +1132,8 @@ llvm::Constant *CodeGenModule::EmitConst
>> case APValue::Float: {
>> const llvm::APFloat &Init = Value.getFloat();
>> if (&Init.getSemantics() == &llvm::APFloat::IEEEhalf &&
>> - !Context.getLangOpts().NativeHalfType)
>> + !Context.getLangOpts().NativeHalfType &&
>> + !Context.getLangOpts().HalfArgsAndReturns)
>> return llvm::ConstantInt::get(VMContext, Init.bitcastToAPInt());
>> else
>> return llvm::ConstantFP::get(VMContext, Init);
>>
>> Modified: cfe/trunk/lib/CodeGen/CGExprScalar.cpp
>> URL:
>> http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGExprScalar.cpp?rev=216558&r1=216557&r2=216558&view=diff
>>
>> ==============================================================================
>> --- cfe/trunk/lib/CodeGen/CGExprScalar.cpp (original)
>> +++ cfe/trunk/lib/CodeGen/CGExprScalar.cpp Wed Aug 27 11:31:57 2014
>> @@ -701,7 +701,8 @@ Value *ScalarExprEmitter::EmitScalarConv
>> llvm::Type *SrcTy = Src->getType();
>>
>> // If casting to/from storage-only half FP, use special intrinsics.
>> - if (SrcType->isHalfType() &&
>> !CGF.getContext().getLangOpts().NativeHalfType) {
>> + if (SrcType->isHalfType() &&
>> !CGF.getContext().getLangOpts().NativeHalfType &&
>> + !CGF.getContext().getLangOpts().HalfArgsAndReturns) {
>> Src = Builder.CreateCall(
>> CGF.CGM.getIntrinsic(llvm::Intrinsic::convert_from_fp16,
>> CGF.CGM.FloatTy),
>> @@ -773,7 +774,8 @@ Value *ScalarExprEmitter::EmitScalarConv
>> DstTy);
>>
>> // Cast to half via float
>> - if (DstType->isHalfType() &&
>> !CGF.getContext().getLangOpts().NativeHalfType)
>> + if (DstType->isHalfType() &&
>> !CGF.getContext().getLangOpts().NativeHalfType &&
>> + !CGF.getContext().getLangOpts().HalfArgsAndReturns)
>> DstTy = CGF.FloatTy;
>>
>> if (isa<llvm::IntegerType>(SrcTy)) {
>> @@ -1691,7 +1693,8 @@ ScalarExprEmitter::EmitScalarPrePostIncD
>> // Add the inc/dec to the real part.
>> llvm::Value *amt;
>>
>> - if (type->isHalfType() &&
>> !CGF.getContext().getLangOpts().NativeHalfType) {
>> + if (type->isHalfType() &&
>> !CGF.getContext().getLangOpts().NativeHalfType &&
>> + !CGF.getContext().getLangOpts().HalfArgsAndReturns) {
>> // Another special case: half FP increment should be done via float
>> value = Builder.CreateCall(
>> CGF.CGM.getIntrinsic(llvm::Intrinsic::convert_from_fp16,
>> @@ -1714,7 +1717,8 @@ ScalarExprEmitter::EmitScalarPrePostIncD
>> }
>> value = Builder.CreateFAdd(value, amt, isInc ? "inc" : "dec");
>>
>> - if (type->isHalfType() &&
>> !CGF.getContext().getLangOpts().NativeHalfType)
>> + if (type->isHalfType() &&
>> !CGF.getContext().getLangOpts().NativeHalfType &&
>> + !CGF.getContext().getLangOpts().HalfArgsAndReturns)
>> value = Builder.CreateCall(
>> CGF.CGM.getIntrinsic(llvm::Intrinsic::convert_to_fp16,
>> CGF.CGM.FloatTy),
>>
>> Modified: cfe/trunk/lib/CodeGen/CodeGenTypes.cpp
>> URL:
>> http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CodeGenTypes.cpp?rev=216558&r1=216557&r2=216558&view=diff
>>
>> ==============================================================================
>> --- cfe/trunk/lib/CodeGen/CodeGenTypes.cpp (original)
>> +++ cfe/trunk/lib/CodeGen/CodeGenTypes.cpp Wed Aug 27 11:31:57 2014
>> @@ -358,9 +358,10 @@ llvm::Type *CodeGenTypes::ConvertType(Qu
>>
>> case BuiltinType::Half:
>> // Half FP can either be storage-only (lowered to i16) or native.
>> - ResultType = getTypeForFormat(getLLVMContext(),
>> - Context.getFloatTypeSemantics(T),
>> - Context.getLangOpts().NativeHalfType);
>> + ResultType =
>> + getTypeForFormat(getLLVMContext(),
>> Context.getFloatTypeSemantics(T),
>> + Context.getLangOpts().NativeHalfType ||
>> + Context.getLangOpts().HalfArgsAndReturns);
>> break;
>> case BuiltinType::Float:
>> case BuiltinType::Double:
>>
>> Modified: cfe/trunk/lib/CodeGen/TargetInfo.cpp
>> URL:
>> http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/TargetInfo.cpp?rev=216558&r1=216557&r2=216558&view=diff
>>
>> ==============================================================================
>> --- cfe/trunk/lib/CodeGen/TargetInfo.cpp (original)
>> +++ cfe/trunk/lib/CodeGen/TargetInfo.cpp Wed Aug 27 11:31:57 2014
>> @@ -3544,8 +3544,9 @@ public:
>> };
>> }
>>
>> -static bool isHomogeneousAggregate(QualType Ty, const Type *&Base,
>> +static bool isARMHomogeneousAggregate(QualType Ty, const Type *&Base,
>> ASTContext &Context,
>> + bool isAArch64,
>> uint64_t *HAMembers = nullptr);
>>
>> ABIArgInfo AArch64ABIInfo::classifyArgumentType(QualType Ty,
>> @@ -3627,7 +3628,7 @@ ABIArgInfo AArch64ABIInfo::classifyArgum
>> // Homogeneous Floating-point Aggregates (HFAs) need to be expanded.
>> const Type *Base = nullptr;
>> uint64_t Members = 0;
>> - if (isHomogeneousAggregate(Ty, Base, getContext(), &Members)) {
>> + if (isARMHomogeneousAggregate(Ty, Base, getContext(), true, &Members))
>> {
>> IsHA = true;
>> if (!IsNamedArg && isDarwinPCS()) {
>> // With the Darwin ABI, variadic arguments are always passed on
>> the stack
>> @@ -3685,7 +3686,7 @@ ABIArgInfo AArch64ABIInfo::classifyRetur
>> return ABIArgInfo::getIgnore();
>>
>> const Type *Base = nullptr;
>> - if (isHomogeneousAggregate(RetTy, Base, getContext()))
>> + if (isARMHomogeneousAggregate(RetTy, Base, getContext(), true))
>> // Homogeneous Floating-point Aggregates (HFAs) are returned
>> directly.
>> return ABIArgInfo::getDirect();
>>
>> @@ -3822,7 +3823,7 @@ static llvm::Value *EmitAArch64VAArg(llv
>>
>> const Type *Base = nullptr;
>> uint64_t NumMembers;
>> - bool IsHFA = isHomogeneousAggregate(Ty, Base, Ctx, &NumMembers);
>> + bool IsHFA = isARMHomogeneousAggregate(Ty, Base, Ctx, true,
>> &NumMembers);
>> if (IsHFA && NumMembers > 1) {
>> // Homogeneous aggregates passed in registers will have their
>> elements split
>> // and stored 16-bytes apart regardless of size (they're notionally
>> in qN,
>> @@ -3965,7 +3966,7 @@ llvm::Value *AArch64ABIInfo::EmitDarwinV
>> uint64_t Align = CGF.getContext().getTypeAlign(Ty) / 8;
>>
>> const Type *Base = nullptr;
>> - bool isHA = isHomogeneousAggregate(Ty, Base, getContext());
>> + bool isHA = isARMHomogeneousAggregate(Ty, Base, getContext(), true);
>>
>> bool isIndirect = false;
>> // Arguments bigger than 16 bytes which aren't homogeneous aggregates
>> should
>> @@ -4251,15 +4252,16 @@ void ARMABIInfo::setRuntimeCC() {
>> RuntimeCC = abiCC;
>> }
>>
>> -/// isHomogeneousAggregate - Return true if a type is an AAPCS-VFP
>> homogeneous
>> +/// isARMHomogeneousAggregate - Return true if a type is an AAPCS-VFP
>> homogeneous
>> /// aggregate. If HAMembers is non-null, the number of base elements
>> /// contained in the type is returned through it; this is used for the
>> /// recursive calls that check aggregate component types.
>> -static bool isHomogeneousAggregate(QualType Ty, const Type *&Base,
>> - ASTContext &Context, uint64_t
>> *HAMembers) {
>> +static bool isARMHomogeneousAggregate(QualType Ty, const Type *&Base,
>> + ASTContext &Context, bool isAArch64,
>> + uint64_t *HAMembers) {
>> uint64_t Members = 0;
>> if (const ConstantArrayType *AT = Context.getAsConstantArrayType(Ty)) {
>> - if (!isHomogeneousAggregate(AT->getElementType(), Base, Context,
>> &Members))
>> + if (!isARMHomogeneousAggregate(AT->getElementType(), Base, Context,
>> isAArch64, &Members))
>> return false;
>> Members *= AT->getSize().getZExtValue();
>> } else if (const RecordType *RT = Ty->getAs<RecordType>()) {
>> @@ -4270,7 +4272,7 @@ static bool isHomogeneousAggregate(QualT
>> Members = 0;
>> for (const auto *FD : RD->fields()) {
>> uint64_t FldMembers;
>> - if (!isHomogeneousAggregate(FD->getType(), Base, Context,
>> &FldMembers))
>> + if (!isARMHomogeneousAggregate(FD->getType(), Base, Context,
>> isAArch64, &FldMembers))
>> return false;
>>
>> Members = (RD->isUnion() ?
>> @@ -4284,12 +4286,22 @@ static bool isHomogeneousAggregate(QualT
>> }
>>
>> // Homogeneous aggregates for AAPCS-VFP must have base types of
>> float,
>> - // double, or 64-bit or 128-bit vectors.
>> + // double, or 64-bit or 128-bit vectors. "long double" has the same
>> machine
>> + // type as double, so it is also allowed as a base type.
>> + // Homogeneous aggregates for AAPCS64 must have base types of a
>> floating
>> + // point type or a short-vector type. This is the same as the 32-bit
>> ABI,
>> + // but with the difference that any floating-point type is allowed,
>> + // including __fp16.
>> if (const BuiltinType *BT = Ty->getAs<BuiltinType>()) {
>> - if (BT->getKind() != BuiltinType::Float &&
>> - BT->getKind() != BuiltinType::Double &&
>> - BT->getKind() != BuiltinType::LongDouble)
>> - return false;
>> + if (isAArch64) {
>> + if (!BT->isFloatingPoint())
>> + return false;
>> + } else {
>> + if (BT->getKind() != BuiltinType::Float &&
>> + BT->getKind() != BuiltinType::Double &&
>> + BT->getKind() != BuiltinType::LongDouble)
>> + return false;
>> + }
>> } else if (const VectorType *VT = Ty->getAs<VectorType>()) {
>> unsigned VecSize = Context.getTypeSize(VT);
>> if (VecSize != 64 && VecSize != 128)
>> @@ -4491,7 +4503,7 @@ ABIArgInfo ARMABIInfo::classifyArgumentT
>> // into VFP registers.
>> const Type *Base = nullptr;
>> uint64_t Members = 0;
>> - if (isHomogeneousAggregate(Ty, Base, getContext(), &Members)) {
>> + if (isARMHomogeneousAggregate(Ty, Base, getContext(), false,
>> &Members)) {
>> assert(Base && "Base class should be set for homogeneous
>> aggregate");
>> // Base can be a floating-point or a vector.
>> if (Base->isVectorType()) {
>> @@ -4696,7 +4708,7 @@ ABIArgInfo ARMABIInfo::classifyReturnTyp
>> // Check for homogeneous aggregates with AAPCS-VFP.
>> if (getABIKind() == AAPCS_VFP && !isVariadic) {
>> const Type *Base = nullptr;
>> - if (isHomogeneousAggregate(RetTy, Base, getContext())) {
>> + if (isARMHomogeneousAggregate(RetTy, Base, getContext(), false)) {
>> assert(Base && "Base class should be set for homogeneous
>> aggregate");
>> // Homogeneous Aggregates are returned directly.
>> return ABIArgInfo::getDirect(nullptr, 0, nullptr, !isAAPCS_VFP);
>>
>> Modified: cfe/trunk/lib/Driver/Tools.cpp
>> URL:
>> http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Driver/Tools.cpp?rev=216558&r1=216557&r2=216558&view=diff
>>
>> ==============================================================================
>> --- cfe/trunk/lib/Driver/Tools.cpp (original)
>> +++ cfe/trunk/lib/Driver/Tools.cpp Wed Aug 27 11:31:57 2014
>> @@ -3714,6 +3714,10 @@ void Clang::ConstructJob(Compilation &C,
>> CmdArgs.push_back(Args.MakeArgString("-mstack-alignment=" +
>> alignment));
>> }
>>
>> + if (getToolChain().getTriple().getArch() == llvm::Triple::aarch64 ||
>> + getToolChain().getTriple().getArch() == llvm::Triple::aarch64_be)
>> + CmdArgs.push_back("-fallow-half-arguments-and-returns");
>> +
>> if (Arg *A = Args.getLastArg(options::OPT_mrestrict_it,
>> options::OPT_mno_restrict_it)) {
>> if (A->getOption().matches(options::OPT_mrestrict_it)) {
>>
>> Modified: cfe/trunk/lib/Frontend/CompilerInvocation.cpp
>> URL:
>> http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Frontend/CompilerInvocation.cpp?rev=216558&r1=216557&r2=216558&view=diff
>>
>> ==============================================================================
>> --- cfe/trunk/lib/Frontend/CompilerInvocation.cpp (original)
>> +++ cfe/trunk/lib/Frontend/CompilerInvocation.cpp Wed Aug 27 11:31:57 2014
>> @@ -1500,6 +1500,8 @@ static void ParseLangArgs(LangOptions &O
>> Opts.CurrentModule = Args.getLastArgValue(OPT_fmodule_name);
>> Opts.ImplementationOfModule =
>> Args.getLastArgValue(OPT_fmodule_implementation_of);
>> + Opts.NativeHalfType = Opts.NativeHalfType;
>> + Opts.HalfArgsAndReturns =
>> Args.hasArg(OPT_fallow_half_arguments_and_returns);
>>
>> if (!Opts.CurrentModule.empty() &&
>> !Opts.ImplementationOfModule.empty() &&
>> Opts.CurrentModule != Opts.ImplementationOfModule) {
>>
>> Modified: cfe/trunk/lib/Sema/SemaType.cpp
>> URL:
>> http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaType.cpp?rev=216558&r1=216557&r2=216558&view=diff
>>
>> ==============================================================================
>> --- cfe/trunk/lib/Sema/SemaType.cpp (original)
>> +++ cfe/trunk/lib/Sema/SemaType.cpp Wed Aug 27 11:31:57 2014
>> @@ -1746,7 +1746,7 @@ bool Sema::CheckFunctionReturnType(QualT
>> }
>>
>> // Functions cannot return half FP.
>> - if (T->isHalfType()) {
>> + if (T->isHalfType() && !getLangOpts().HalfArgsAndReturns) {
>> Diag(Loc, diag::err_parameters_retval_cannot_have_fp16_type) << 1 <<
>> FixItHint::CreateInsertion(Loc, "*");
>> return true;
>> @@ -1776,7 +1776,7 @@ QualType Sema::BuildFunctionType(QualTyp
>> if (ParamType->isVoidType()) {
>> Diag(Loc, diag::err_param_with_void_type);
>> Invalid = true;
>> - } else if (ParamType->isHalfType()) {
>> + } else if (ParamType->isHalfType() &&
>> !getLangOpts().HalfArgsAndReturns) {
>> // Disallow half FP arguments.
>> Diag(Loc, diag::err_parameters_retval_cannot_have_fp16_type) << 0
>> <<
>> FixItHint::CreateInsertion(Loc, "*");
>> @@ -2751,7 +2751,7 @@ static TypeSourceInfo *GetFullTypeForDec
>> S.Diag(D.getIdentifierLoc(), diag::err_opencl_half_return)
>> << T;
>> D.setInvalidType(true);
>> }
>> - } else {
>> + } else if (!S.getLangOpts().HalfArgsAndReturns) {
>> S.Diag(D.getIdentifierLoc(),
>> diag::err_parameters_retval_cannot_have_fp16_type) << 1;
>> D.setInvalidType(true);
>> @@ -2941,7 +2941,7 @@ static TypeSourceInfo *GetFullTypeForDec
>> D.setInvalidType();
>> Param->setInvalidDecl();
>> }
>> - } else {
>> + } else if (!S.getLangOpts().HalfArgsAndReturns) {
>> S.Diag(Param->getLocation(),
>> diag::err_parameters_retval_cannot_have_fp16_type) << 0;
>> D.setInvalidType();
>>
>> Modified: cfe/trunk/test/CodeGen/arm64-aapcs-arguments.c
>> URL:
>> http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGen/arm64-aapcs-arguments.c?rev=216558&r1=216557&r2=216558&view=diff
>>
>> ==============================================================================
>> --- cfe/trunk/test/CodeGen/arm64-aapcs-arguments.c (original)
>> +++ cfe/trunk/test/CodeGen/arm64-aapcs-arguments.c Wed Aug 27 11:31:57
>> 2014
>> @@ -1,4 +1,4 @@
>> -// RUN: %clang_cc1 -triple arm64-linux-gnu -target-feature +neon
>> -target-abi aapcs -ffreestanding -emit-llvm -w -o - %s | FileCheck %s
>> +// RUN: %clang_cc1 -triple aarch64-linux-gnu -target-feature +neon
>> -target-abi aapcs -ffreestanding -fallow-half-arguments-and-returns
>> -emit-llvm -w -o - %s | FileCheck %s
>>
>> // AAPCS clause C.8 says: If the argument has an alignment of 16 then
>> the NGRN
>> // is rounded up to the next even number.
>> @@ -40,3 +40,12 @@ void test4(BigHFA v0_v2, BigHFA v3_v5, B
>> // CHECK: define i8 @test5(i8 %a, i16 %b)
>> unsigned char test5(unsigned char a, signed short b) {
>> }
>> +
>> +// __fp16 can be used as a function argument or return type (ACLE 2.0)
>> +// CHECK: define half @test_half(half %{{.*}})
>> +__fp16 test_half(__fp16 A) { }
>> +
>> +// __fp16 is a base type for homogeneous floating-point aggregates for
>> AArch64 (but not 32-bit ARM).
>> +// CHECK: define %struct.HFA_half @test_half_hfa(half %{{.*}}, half
>> %{{.*}}, half %{{.*}}, half %{{.*}})
>> +struct HFA_half { __fp16 a[4]; };
>> +struct HFA_half test_half_hfa(struct HFA_half A) { }
>>
>>
>> _______________________________________________
>> cfe-commits mailing list
>> cfe-commits at cs.uiuc.edu
>> http://lists.cs.uiuc.edu/mailman/listinfo/cfe-commits
>>
>
>
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