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android / toolchain / llvm-project / refs/heads/mirror-goog-main-rust-toolchain-source / . / clang / lib / Sema / SemaPPC.cpp
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//===------ SemaPPC.cpp ------ PowerPC target-specific routines -----------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file implements semantic analysis functions specific to PowerPC.
//
//===----------------------------------------------------------------------===//
#include "clang/Sema/SemaPPC.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/Attr.h"
#include "clang/AST/CharUnits.h"
#include "clang/AST/Decl.h"
#include "clang/AST/Type.h"
#include "clang/Basic/DiagnosticSema.h"
#include "clang/Basic/SourceLocation.h"
#include "clang/Basic/TargetBuiltins.h"
#include "clang/Basic/TargetInfo.h"
#include "clang/Sema/Sema.h"
#include "llvm/ADT/APSInt.h"
namespace clang {
SemaPPC::SemaPPC(Sema &S) : SemaBase(S) {}
void SemaPPC::checkAIXMemberAlignment(SourceLocation Loc, const Expr *Arg) {
const auto *ICE = dyn_cast<ImplicitCastExpr>(Arg->IgnoreParens());
if (!ICE)
return;
const auto *DR = dyn_cast<DeclRefExpr>(ICE->getSubExpr());
if (!DR)
return;
const auto *PD = dyn_cast<ParmVarDecl>(DR->getDecl());
if (!PD || !PD->getType()->isRecordType())
return;
QualType ArgType = Arg->getType();
for (const FieldDecl *FD :
ArgType->castAs<RecordType>()->getDecl()->fields()) {
if (const auto *AA = FD->getAttr<AlignedAttr>()) {
CharUnits Alignment = getASTContext().toCharUnitsFromBits(
AA->getAlignment(getASTContext()));
if (Alignment.getQuantity() == 16) {
Diag(FD->getLocation(), diag::warn_not_xl_compatible) << FD;
Diag(Loc, diag::note_misaligned_member_used_here) << PD;
}
}
}
}
static bool isPPC_64Builtin(unsigned BuiltinID) {
// These builtins only work on PPC 64bit targets.
switch (BuiltinID) {
case PPC::BI__builtin_divde:
case PPC::BI__builtin_divdeu:
case PPC::BI__builtin_bpermd:
case PPC::BI__builtin_pdepd:
case PPC::BI__builtin_pextd:
case PPC::BI__builtin_ppc_cdtbcd:
case PPC::BI__builtin_ppc_cbcdtd:
case PPC::BI__builtin_ppc_addg6s:
case PPC::BI__builtin_ppc_ldarx:
case PPC::BI__builtin_ppc_stdcx:
case PPC::BI__builtin_ppc_tdw:
case PPC::BI__builtin_ppc_trapd:
case PPC::BI__builtin_ppc_cmpeqb:
case PPC::BI__builtin_ppc_setb:
case PPC::BI__builtin_ppc_mulhd:
case PPC::BI__builtin_ppc_mulhdu:
case PPC::BI__builtin_ppc_maddhd:
case PPC::BI__builtin_ppc_maddhdu:
case PPC::BI__builtin_ppc_maddld:
case PPC::BI__builtin_ppc_load8r:
case PPC::BI__builtin_ppc_store8r:
case PPC::BI__builtin_ppc_insert_exp:
case PPC::BI__builtin_ppc_extract_sig:
case PPC::BI__builtin_ppc_addex:
case PPC::BI__builtin_darn:
case PPC::BI__builtin_darn_raw:
case PPC::BI__builtin_ppc_compare_and_swaplp:
case PPC::BI__builtin_ppc_fetch_and_addlp:
case PPC::BI__builtin_ppc_fetch_and_andlp:
case PPC::BI__builtin_ppc_fetch_and_orlp:
case PPC::BI__builtin_ppc_fetch_and_swaplp:
return true;
}
return false;
}
bool SemaPPC::CheckPPCBuiltinFunctionCall(const TargetInfo &TI,
unsigned BuiltinID,
CallExpr *TheCall) {
ASTContext &Context = getASTContext();
bool IsTarget64Bit = TI.getTypeWidth(TI.getIntPtrType()) == 64;
llvm::APSInt Result;
if (isPPC_64Builtin(BuiltinID) && !IsTarget64Bit)
return Diag(TheCall->getBeginLoc(), diag::err_64_bit_builtin_32_bit_tgt)
<< TheCall->getSourceRange();
switch (BuiltinID) {
default:
return false;
case PPC::BI__builtin_altivec_crypto_vshasigmaw:
case PPC::BI__builtin_altivec_crypto_vshasigmad:
return SemaRef.BuiltinConstantArgRange(TheCall, 1, 0, 1) ||
SemaRef.BuiltinConstantArgRange(TheCall, 2, 0, 15);
case PPC::BI__builtin_altivec_dss:
return SemaRef.BuiltinConstantArgRange(TheCall, 0, 0, 3);
case PPC::BI__builtin_tbegin:
case PPC::BI__builtin_tend:
return SemaRef.BuiltinConstantArgRange(TheCall, 0, 0, 1);
case PPC::BI__builtin_tsr:
return SemaRef.BuiltinConstantArgRange(TheCall, 0, 0, 7);
case PPC::BI__builtin_tabortwc:
case PPC::BI__builtin_tabortdc:
return SemaRef.BuiltinConstantArgRange(TheCall, 0, 0, 31);
case PPC::BI__builtin_tabortwci:
case PPC::BI__builtin_tabortdci:
return SemaRef.BuiltinConstantArgRange(TheCall, 0, 0, 31) ||
SemaRef.BuiltinConstantArgRange(TheCall, 2, 0, 31);
// According to GCC 'Basic PowerPC Built-in Functions Available on ISA 2.05',
// __builtin_(un)pack_longdouble are available only if long double uses IBM
// extended double representation.
case PPC::BI__builtin_unpack_longdouble:
if (SemaRef.BuiltinConstantArgRange(TheCall, 1, 0, 1))
return true;
[[fallthrough]];
case PPC::BI__builtin_pack_longdouble:
if (&TI.getLongDoubleFormat() != &llvm::APFloat::PPCDoubleDouble())
return Diag(TheCall->getBeginLoc(), diag::err_ppc_builtin_requires_abi)
<< "ibmlongdouble";
return false;
case PPC::BI__builtin_altivec_dst:
case PPC::BI__builtin_altivec_dstt:
case PPC::BI__builtin_altivec_dstst:
case PPC::BI__builtin_altivec_dststt:
return SemaRef.BuiltinConstantArgRange(TheCall, 2, 0, 3);
case PPC::BI__builtin_vsx_xxpermdi:
case PPC::BI__builtin_vsx_xxsldwi:
return BuiltinVSX(TheCall);
case PPC::BI__builtin_unpack_vector_int128:
return SemaRef.BuiltinConstantArgRange(TheCall, 1, 0, 1);
case PPC::BI__builtin_altivec_vgnb:
return SemaRef.BuiltinConstantArgRange(TheCall, 1, 2, 7);
case PPC::BI__builtin_vsx_xxeval:
return SemaRef.BuiltinConstantArgRange(TheCall, 3, 0, 255);
case PPC::BI__builtin_altivec_vsldbi:
return SemaRef.BuiltinConstantArgRange(TheCall, 2, 0, 7);
case PPC::BI__builtin_altivec_vsrdbi:
return SemaRef.BuiltinConstantArgRange(TheCall, 2, 0, 7);
case PPC::BI__builtin_vsx_xxpermx:
return SemaRef.BuiltinConstantArgRange(TheCall, 3, 0, 7);
case PPC::BI__builtin_ppc_tw:
case PPC::BI__builtin_ppc_tdw:
return SemaRef.BuiltinConstantArgRange(TheCall, 2, 1, 31);
case PPC::BI__builtin_ppc_cmprb:
return SemaRef.BuiltinConstantArgRange(TheCall, 0, 0, 1);
// For __rlwnm, __rlwimi and __rldimi, the last parameter mask must
// be a constant that represents a contiguous bit field.
case PPC::BI__builtin_ppc_rlwnm:
return SemaRef.ValueIsRunOfOnes(TheCall, 2);
case PPC::BI__builtin_ppc_rlwimi:
return SemaRef.BuiltinConstantArgRange(TheCall, 2, 0, 31) ||
SemaRef.ValueIsRunOfOnes(TheCall, 3);
case PPC::BI__builtin_ppc_rldimi:
return SemaRef.BuiltinConstantArgRange(TheCall, 2, 0, 63) ||
SemaRef.ValueIsRunOfOnes(TheCall, 3);
case PPC::BI__builtin_ppc_addex: {
if (SemaRef.BuiltinConstantArgRange(TheCall, 2, 0, 3))
return true;
// Output warning for reserved values 1 to 3.
int ArgValue =
TheCall->getArg(2)->getIntegerConstantExpr(Context)->getSExtValue();
if (ArgValue != 0)
Diag(TheCall->getBeginLoc(), diag::warn_argument_undefined_behaviour)
<< ArgValue;
return false;
}
case PPC::BI__builtin_ppc_mtfsb0:
case PPC::BI__builtin_ppc_mtfsb1:
return SemaRef.BuiltinConstantArgRange(TheCall, 0, 0, 31);
case PPC::BI__builtin_ppc_mtfsf:
return SemaRef.BuiltinConstantArgRange(TheCall, 0, 0, 255);
case PPC::BI__builtin_ppc_mtfsfi:
return SemaRef.BuiltinConstantArgRange(TheCall, 0, 0, 7) ||
SemaRef.BuiltinConstantArgRange(TheCall, 1, 0, 15);
case PPC::BI__builtin_ppc_alignx:
return SemaRef.BuiltinConstantArgPower2(TheCall, 0);
case PPC::BI__builtin_ppc_rdlam:
return SemaRef.ValueIsRunOfOnes(TheCall, 2);
case PPC::BI__builtin_vsx_ldrmb:
case PPC::BI__builtin_vsx_strmb:
return SemaRef.BuiltinConstantArgRange(TheCall, 1, 1, 16);
case PPC::BI__builtin_altivec_vcntmbb:
case PPC::BI__builtin_altivec_vcntmbh:
case PPC::BI__builtin_altivec_vcntmbw:
case PPC::BI__builtin_altivec_vcntmbd:
return SemaRef.BuiltinConstantArgRange(TheCall, 1, 0, 1);
case PPC::BI__builtin_vsx_xxgenpcvbm:
case PPC::BI__builtin_vsx_xxgenpcvhm:
case PPC::BI__builtin_vsx_xxgenpcvwm:
case PPC::BI__builtin_vsx_xxgenpcvdm:
return SemaRef.BuiltinConstantArgRange(TheCall, 1, 0, 3);
case PPC::BI__builtin_ppc_test_data_class: {
// Check if the first argument of the __builtin_ppc_test_data_class call is
// valid. The argument must be 'float' or 'double' or '__float128'.
QualType ArgType = TheCall->getArg(0)->getType();
if (ArgType != QualType(Context.FloatTy) &&
ArgType != QualType(Context.DoubleTy) &&
ArgType != QualType(Context.Float128Ty))
return Diag(TheCall->getBeginLoc(),
diag::err_ppc_invalid_test_data_class_type);
return SemaRef.BuiltinConstantArgRange(TheCall, 1, 0, 127);
}
case PPC::BI__builtin_ppc_maxfe:
case PPC::BI__builtin_ppc_minfe:
case PPC::BI__builtin_ppc_maxfl:
case PPC::BI__builtin_ppc_minfl:
case PPC::BI__builtin_ppc_maxfs:
case PPC::BI__builtin_ppc_minfs: {
if (Context.getTargetInfo().getTriple().isOSAIX() &&
(BuiltinID == PPC::BI__builtin_ppc_maxfe ||
BuiltinID == PPC::BI__builtin_ppc_minfe))
return Diag(TheCall->getBeginLoc(), diag::err_target_unsupported_type)
<< "builtin" << true << 128 << QualType(Context.LongDoubleTy)
<< false << Context.getTargetInfo().getTriple().str();
// Argument type should be exact.
QualType ArgType = QualType(Context.LongDoubleTy);
if (BuiltinID == PPC::BI__builtin_ppc_maxfl ||
BuiltinID == PPC::BI__builtin_ppc_minfl)
ArgType = QualType(Context.DoubleTy);
else if (BuiltinID == PPC::BI__builtin_ppc_maxfs ||
BuiltinID == PPC::BI__builtin_ppc_minfs)
ArgType = QualType(Context.FloatTy);
for (unsigned I = 0, E = TheCall->getNumArgs(); I < E; ++I)
if (TheCall->getArg(I)->getType() != ArgType)
return Diag(TheCall->getBeginLoc(),
diag::err_typecheck_convert_incompatible)
<< TheCall->getArg(I)->getType() << ArgType << 1 << 0 << 0;
return false;
}
#define CUSTOM_BUILTIN(Name, Intr, Types, Acc, Feature) \
case PPC::BI__builtin_##Name: \
return BuiltinPPCMMACall(TheCall, BuiltinID, Types);
#include "clang/Basic/BuiltinsPPC.def"
}
llvm_unreachable("must return from switch");
}
// Check if the given type is a non-pointer PPC MMA type. This function is used
// in Sema to prevent invalid uses of restricted PPC MMA types.
bool SemaPPC::CheckPPCMMAType(QualType Type, SourceLocation TypeLoc) {
ASTContext &Context = getASTContext();
if (Type->isPointerType() || Type->isArrayType())
return false;
QualType CoreType = Type.getCanonicalType().getUnqualifiedType();
#define PPC_VECTOR_TYPE(Name, Id, Size) || CoreType == Context.Id##Ty
if (false
#include "clang/Basic/PPCTypes.def"
) {
Diag(TypeLoc, diag::err_ppc_invalid_use_mma_type);
return true;
}
return false;
}
/// DecodePPCMMATypeFromStr - This decodes one PPC MMA type descriptor from Str,
/// advancing the pointer over the consumed characters. The decoded type is
/// returned. If the decoded type represents a constant integer with a
/// constraint on its value then Mask is set to that value. The type descriptors
/// used in Str are specific to PPC MMA builtins and are documented in the file
/// defining the PPC builtins.
static QualType DecodePPCMMATypeFromStr(ASTContext &Context, const char *&Str,
unsigned &Mask) {
bool RequireICE = false;
ASTContext::GetBuiltinTypeError Error = ASTContext::GE_None;
switch (*Str++) {
case 'V':
return Context.getVectorType(Context.UnsignedCharTy, 16,
VectorKind::AltiVecVector);
case 'i': {
char *End;
unsigned size = strtoul(Str, &End, 10);
assert(End != Str && "Missing constant parameter constraint");
Str = End;
Mask = size;
return Context.IntTy;
}
case 'W': {
char *End;
unsigned size = strtoul(Str, &End, 10);
assert(End != Str && "Missing PowerPC MMA type size");
Str = End;
QualType Type;
switch (size) {
#define PPC_VECTOR_TYPE(typeName, Id, size) \
case size: \
Type = Context.Id##Ty; \
break;
#include "clang/Basic/PPCTypes.def"
default:
llvm_unreachable("Invalid PowerPC MMA vector type");
}
bool CheckVectorArgs = false;
while (!CheckVectorArgs) {
switch (*Str++) {
case '*':
Type = Context.getPointerType(Type);
break;
case 'C':
Type = Type.withConst();
break;
default:
CheckVectorArgs = true;
--Str;
break;
}
}
return Type;
}
default:
return Context.DecodeTypeStr(--Str, Context, Error, RequireICE, true);
}
}
bool SemaPPC::BuiltinPPCMMACall(CallExpr *TheCall, unsigned BuiltinID,
const char *TypeStr) {
assert((TypeStr[0] != '\0') &&
"Invalid types in PPC MMA builtin declaration");
ASTContext &Context = getASTContext();
unsigned Mask = 0;
unsigned ArgNum = 0;
// The first type in TypeStr is the type of the value returned by the
// builtin. So we first read that type and change the type of TheCall.
QualType type = DecodePPCMMATypeFromStr(Context, TypeStr, Mask);
TheCall->setType(type);
while (*TypeStr != '\0') {
Mask = 0;
QualType ExpectedType = DecodePPCMMATypeFromStr(Context, TypeStr, Mask);
if (ArgNum >= TheCall->getNumArgs()) {
ArgNum++;
break;
}
Expr *Arg = TheCall->getArg(ArgNum);
QualType PassedType = Arg->getType();
QualType StrippedRVType = PassedType.getCanonicalType();
// Strip Restrict/Volatile qualifiers.
if (StrippedRVType.isRestrictQualified() ||
StrippedRVType.isVolatileQualified())
StrippedRVType = StrippedRVType.getCanonicalType().getUnqualifiedType();
// The only case where the argument type and expected type are allowed to
// mismatch is if the argument type is a non-void pointer (or array) and
// expected type is a void pointer.
if (StrippedRVType != ExpectedType)
if (!(ExpectedType->isVoidPointerType() &&
(StrippedRVType->isPointerType() || StrippedRVType->isArrayType())))
return Diag(Arg->getBeginLoc(),
diag::err_typecheck_convert_incompatible)
<< PassedType << ExpectedType << 1 << 0 << 0;
// If the value of the Mask is not 0, we have a constraint in the size of
// the integer argument so here we ensure the argument is a constant that
// is in the valid range.
if (Mask != 0 &&
SemaRef.BuiltinConstantArgRange(TheCall, ArgNum, 0, Mask, true))
return true;
ArgNum++;
}
// In case we exited early from the previous loop, there are other types to
// read from TypeStr. So we need to read them all to ensure we have the right
// number of arguments in TheCall and if it is not the case, to display a
// better error message.
while (*TypeStr != '\0') {
(void)DecodePPCMMATypeFromStr(Context, TypeStr, Mask);
ArgNum++;
}
if (SemaRef.checkArgCount(TheCall, ArgNum))
return true;
return false;
}
bool SemaPPC::BuiltinVSX(CallExpr *TheCall) {
unsigned ExpectedNumArgs = 3;
if (SemaRef.checkArgCount(TheCall, ExpectedNumArgs))
return true;
// Check the third argument is a compile time constant
if (!TheCall->getArg(2)->isIntegerConstantExpr(getASTContext()))
return Diag(TheCall->getBeginLoc(),
diag::err_vsx_builtin_nonconstant_argument)
<< 3 /* argument index */ << TheCall->getDirectCallee()
<< SourceRange(TheCall->getArg(2)->getBeginLoc(),
TheCall->getArg(2)->getEndLoc());
QualType Arg1Ty = TheCall->getArg(0)->getType();
QualType Arg2Ty = TheCall->getArg(1)->getType();
// Check the type of argument 1 and argument 2 are vectors.
SourceLocation BuiltinLoc = TheCall->getBeginLoc();
if ((!Arg1Ty->isVectorType() && !Arg1Ty->isDependentType()) ||
(!Arg2Ty->isVectorType() && !Arg2Ty->isDependentType())) {
return Diag(BuiltinLoc, diag::err_vec_builtin_non_vector)
<< TheCall->getDirectCallee() << /*isMorethantwoArgs*/ false
<< SourceRange(TheCall->getArg(0)->getBeginLoc(),
TheCall->getArg(1)->getEndLoc());
}
// Check the first two arguments are the same type.
if (!getASTContext().hasSameUnqualifiedType(Arg1Ty, Arg2Ty)) {
return Diag(BuiltinLoc, diag::err_vec_builtin_incompatible_vector)
<< TheCall->getDirectCallee() << /*isMorethantwoArgs*/ false
<< SourceRange(TheCall->getArg(0)->getBeginLoc(),
TheCall->getArg(1)->getEndLoc());
}
// When default clang type checking is turned off and the customized type
// checking is used, the returning type of the function must be explicitly
// set. Otherwise it is _Bool by default.
TheCall->setType(Arg1Ty);
return false;
}
} // namespace clang