python3kgae updated this revision to Diff 460659.
python3kgae added a comment.
Limit BitInt vector to byte-sized and power of 2 BitInt.
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D133634/new/
https://reviews.llvm.org/D133634
Files:
clang/include/clang/Basic/DiagnosticSemaKinds.td
clang/lib/AST/ASTContext.cpp
clang/lib/Sema/SemaType.cpp
clang/test/Sema/builtin-classify-type.c
clang/test/SemaCXX/ext-int.cpp
Index: clang/test/SemaCXX/ext-int.cpp
===================================================================
--- clang/test/SemaCXX/ext-int.cpp
+++ clang/test/SemaCXX/ext-int.cpp
@@ -84,10 +84,22 @@
};
// Reject vector types:
-// expected-error@+1{{invalid vector element type '_BitInt(32)'}}
-typedef _BitInt(32) __attribute__((vector_size(16))) VecTy;
-// expected-error@+1{{invalid vector element type '_BitInt(32)'}}
-typedef _BitInt(32) __attribute__((ext_vector_type(32))) OtherVecTy;
+// expected-error@+1{{invalid vector element type '_BitInt(2)', must be byte-sized and power of 2 _BitInt}}
+typedef _BitInt(2) __attribute__((vector_size(16))) VecTy;
+// expected-error@+1{{invalid vector element type '_BitInt(2)', must be byte-sized and power of 2 _BitInt}}
+typedef _BitInt(2) __attribute__((ext_vector_type(32))) OtherVecTy;
+// expected-error@+1{{invalid vector element type '_BitInt(4)', must be byte-sized and power of 2 _BitInt}}
+typedef _BitInt(4) __attribute__((vector_size(16))) VecTy2;
+// expected-error@+1{{invalid vector element type '_BitInt(4)', must be byte-sized and power of 2 _BitInt}}
+typedef _BitInt(4) __attribute__((ext_vector_type(32))) OtherVecTy2;
+// expected-error@+1{{invalid vector element type '_BitInt(5)', must be byte-sized and power of 2 _BitInt}}
+typedef _BitInt(5) __attribute__((vector_size(16))) VecTy3;
+// expected-error@+1{{invalid vector element type '_BitInt(5)', must be byte-sized and power of 2 _BitInt}}
+typedef _BitInt(5) __attribute__((ext_vector_type(32))) OtherVecTy3;
+// expected-error@+1{{invalid vector element type '_BitInt(37)', must be byte-sized and power of 2 _BitInt}}
+typedef _BitInt(37) __attribute__((vector_size(16))) VecTy4;
+// expected-error@+1{{invalid vector element type '_BitInt(37)', must be byte-sized and power of 2 _BitInt}}
+typedef _BitInt(37) __attribute__((ext_vector_type(32))) OtherVecTy4;
// Allow _Complex:
_Complex _BitInt(3) Cmplx;
Index: clang/test/Sema/builtin-classify-type.c
===================================================================
--- clang/test/Sema/builtin-classify-type.c
+++ clang/test/Sema/builtin-classify-type.c
@@ -29,6 +29,23 @@
__attribute__((vector_size(16))) int vec;
typedef __attribute__((ext_vector_type(4))) int evec_t;
evec_t evec;
+ typedef _BitInt(8) int8_t3 __attribute__((ext_vector_type(3)));
+ int8_t3 t3;
+ typedef _BitInt(16) int16_t3 __attribute__((ext_vector_type(4)));
+ int16_t3 t4;
+ typedef _BitInt(32) int32_t3 __attribute__((ext_vector_type(5)));
+ int32_t3 t5;
+ typedef _BitInt(64) int64_t3 __attribute__((ext_vector_type(6)));
+ int64_t3 t6;
+ typedef _BitInt(8) vint8_t3 __attribute__((vector_size(3)));
+ vint8_t3 vt3;
+ typedef _BitInt(16) vint16_t3 __attribute__((vector_size(4)));
+ vint16_t3 vt4;
+ typedef _BitInt(32) vint32_t3 __attribute__((vector_size(8)));
+ vint32_t3 vt5;
+ typedef _BitInt(64) vint64_t3 __attribute__((vector_size(16)));
+ vint64_t3 vt6;
+
_Atomic int atomic_i;
_Atomic double atomic_d;
_Complex int complex_i;
Index: clang/lib/Sema/SemaType.cpp
===================================================================
--- clang/lib/Sema/SemaType.cpp
+++ clang/lib/Sema/SemaType.cpp
@@ -2637,11 +2637,20 @@
// can't already be a vector.
if ((!CurType->isDependentType() &&
(!CurType->isBuiltinType() || CurType->isBooleanType() ||
- (!CurType->isIntegerType() && !CurType->isRealFloatingType()))) ||
+ (!CurType->isIntegerType() && !CurType->isRealFloatingType())) &&
+ !CurType->isBitIntType()) ||
CurType->isArrayType()) {
Diag(AttrLoc, diag::err_attribute_invalid_vector_type) << CurType;
return QualType();
}
+ // Only support _BitInt elements with byte-sized power of 2 NumBits.
+ if (CurType->isBitIntType()) {
+ unsigned NumBits = CurType->getAs<BitIntType>()->getNumBits();
+ if (!llvm::isPowerOf2_32(NumBits) || NumBits < 8) {
+ Diag(AttrLoc, diag::err_attribute_invalid_bitint_vector_type) << CurType;
+ return QualType();
+ }
+ }
if (SizeExpr->isTypeDependent() || SizeExpr->isValueDependent())
return Context.getDependentVectorType(CurType, SizeExpr, AttrLoc,
@@ -2707,12 +2716,21 @@
// We explictly allow bool elements in ext_vector_type for C/C++.
bool IsNoBoolVecLang = getLangOpts().OpenCL || getLangOpts().OpenCLCPlusPlus;
if ((!T->isDependentType() && !T->isIntegerType() &&
- !T->isRealFloatingType()) || T->isBitIntType() ||
+ !T->isRealFloatingType()) ||
(IsNoBoolVecLang && T->isBooleanType())) {
Diag(AttrLoc, diag::err_attribute_invalid_vector_type) << T;
return QualType();
}
+ // Only support _BitInt elements with byte-sized power of 2 NumBits.
+ if (T->isBitIntType()) {
+ unsigned NumBits = T->getAs<BitIntType>()->getNumBits();
+ if (!llvm::isPowerOf2_32(NumBits) || NumBits < 8) {
+ Diag(AttrLoc, diag::err_attribute_invalid_bitint_vector_type) << T;
+ return QualType();
+ }
+ }
+
if (!ArraySize->isTypeDependent() && !ArraySize->isValueDependent()) {
Optional<llvm::APSInt> vecSize = ArraySize->getIntegerConstantExpr(Context);
if (!vecSize) {
Index: clang/lib/AST/ASTContext.cpp
===================================================================
--- clang/lib/AST/ASTContext.cpp
+++ clang/lib/AST/ASTContext.cpp
@@ -4012,7 +4012,11 @@
/// the specified element type and size. VectorType must be a built-in type.
QualType ASTContext::getVectorType(QualType vecType, unsigned NumElts,
VectorType::VectorKind VecKind) const {
- assert(vecType->isBuiltinType());
+ assert(vecType->isBuiltinType() ||
+ (vecType->isBitIntType() &&
+ // Only support _BitInt elements with byte-sized power of 2 NumBits.
+ llvm::isPowerOf2_32(vecType->getAs<BitIntType>()->getNumBits()) &&
+ vecType->getAs<BitIntType>()->getNumBits() >= 8));
// Check if we've already instantiated a vector of this type.
llvm::FoldingSetNodeID ID;
@@ -4080,9 +4084,13 @@
/// getExtVectorType - Return the unique reference to an extended vector type of
/// the specified element type and size. VectorType must be a built-in type.
-QualType
-ASTContext::getExtVectorType(QualType vecType, unsigned NumElts) const {
- assert(vecType->isBuiltinType() || vecType->isDependentType());
+QualType ASTContext::getExtVectorType(QualType vecType,
+ unsigned NumElts) const {
+ assert(vecType->isBuiltinType() || vecType->isDependentType() ||
+ (vecType->isBitIntType() &&
+ // Only support _BitInt elements with byte-sized power of 2 NumBits.
+ llvm::isPowerOf2_32(vecType->getAs<BitIntType>()->getNumBits()) &&
+ vecType->getAs<BitIntType>()->getNumBits() >= 8));
// Check if we've already instantiated a vector of this type.
llvm::FoldingSetNodeID ID;
Index: clang/include/clang/Basic/DiagnosticSemaKinds.td
===================================================================
--- clang/include/clang/Basic/DiagnosticSemaKinds.td
+++ clang/include/clang/Basic/DiagnosticSemaKinds.td
@@ -3021,6 +3021,7 @@
def err_attribute_too_few_arguments : Error<
"%0 attribute takes at least %1 argument%s1">;
def err_attribute_invalid_vector_type : Error<"invalid vector element type %0">;
+def err_attribute_invalid_bitint_vector_type : Error<"invalid vector element type %0, must be byte-sized and power of 2 _BitInt">;
def err_attribute_invalid_matrix_type : Error<"invalid matrix element type %0">;
def err_attribute_bad_neon_vector_size : Error<
"Neon vector size must be 64 or 128 bits">;
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