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[ATTRIBUTE] Support base vector types of __attribute__((mode)), patch by Alexey Frolov 

Base type of attribute((mode)) can actually be a vector type.
The patch is to distinguish between base type and base element type.

This fixes http://llvm.org/PR17453.
Differential Revision: http://reviews.llvm.org/D10058

llvm-svn: 240125
This commit is contained in:
Alexey Bataev 2015-06-19 07:46:21 +00:00
parent 94aed4fc52
commit 326057d0da
4 changed files with 104 additions and 10 deletions
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2
clang/include/clang/Basic/DiagnosticSemaKinds.td
View File

@ -2685,6 +2685,8 @@ def err_mode_not_primitive : Error<
"mode attribute only supported for integer and floating-point types">;
def err_mode_wrong_type : Error<
"type of machine mode does not match type of base type">;
def err_complex_mode_vector_type : Error<
"type of machine mode does not support base vector types">;
def err_attr_wrong_decl : Error<
"%0 attribute invalid on this declaration, requires typedef or value">;
def warn_attribute_nonnull_no_pointers : Warning<

45
clang/lib/Sema/SemaDeclAttr.cpp
View File

@ -3154,16 +3154,22 @@ static void handleModeAttr(Sema &S, Decl *D, const AttributeList &Attr) {
return;
}
if (!OldTy->getAs<BuiltinType>() && !OldTy->isComplexType())
// Base type can also be a vector type (see PR17453).
// Distinguish between base type and base element type.
QualType OldElemTy = OldTy;
if (const VectorType *VT = OldTy->getAs<VectorType>())
OldElemTy = VT->getElementType();
if (!OldElemTy->getAs<BuiltinType>() && !OldElemTy->isComplexType())
S.Diag(Attr.getLoc(), diag::err_mode_not_primitive);
else if (IntegerMode) {
if (!OldTy->isIntegralOrEnumerationType())
if (!OldElemTy->isIntegralOrEnumerationType())
S.Diag(Attr.getLoc(), diag::err_mode_wrong_type);
} else if (ComplexMode) {
if (!OldTy->isComplexType())
if (!OldElemTy->isComplexType())
S.Diag(Attr.getLoc(), diag::err_mode_wrong_type);
} else {
if (!OldTy->isFloatingType())
if (!OldElemTy->isFloatingType())
S.Diag(Attr.getLoc(), diag::err_mode_wrong_type);
}
@ -3176,21 +3182,40 @@ static void handleModeAttr(Sema &S, Decl *D, const AttributeList &Attr) {
return;
}
QualType NewTy;
QualType NewElemTy;
if (IntegerMode)
NewTy = S.Context.getIntTypeForBitwidth(DestWidth,
OldTy->isSignedIntegerType());
NewElemTy = S.Context.getIntTypeForBitwidth(
DestWidth, OldElemTy->isSignedIntegerType());
else
NewTy = S.Context.getRealTypeForBitwidth(DestWidth);
NewElemTy = S.Context.getRealTypeForBitwidth(DestWidth);
if (NewTy.isNull()) {
if (NewElemTy.isNull()) {
S.Diag(Attr.getLoc(), diag::err_machine_mode) << 1 /*Unsupported*/ << Name;
return;
}
if (ComplexMode) {
NewTy = S.Context.getComplexType(NewTy);
NewElemTy = S.Context.getComplexType(NewElemTy);
}
QualType NewTy = NewElemTy;
if (const VectorType *OldVT = OldTy->getAs<VectorType>()) {
// Complex machine mode does not support base vector types.
if (ComplexMode) {
S.Diag(Attr.getLoc(), diag::err_complex_mode_vector_type);
return;
}
unsigned NumElements = S.Context.getTypeSize(OldElemTy) *
OldVT->getNumElements() /
S.Context.getTypeSize(NewElemTy);
NewTy =
S.Context.getVectorType(NewElemTy, NumElements, OldVT->getVectorKind());
}
if (NewTy.isNull()) {
S.Diag(Attr.getLoc(), diag::err_mode_wrong_type);
return;
}
// Install the new type.

41
clang/test/CodeGen/attr-mode-vector-types.c Normal file
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@ -0,0 +1,41 @@
// RUN: %clang_cc1 -triple x86_64-unknown-unknown %s -emit-llvm -o - | FileCheck %s
typedef int __attribute__((mode(byte))) __attribute__((vector_size(4))) vec_t1;
typedef int __attribute__((mode(QI))) __attribute__((vector_size(8))) vec_t2;
typedef int __attribute__((mode(SI))) __attribute__((vector_size(16))) vec_t3;
typedef int __attribute__((mode(DI))) __attribute__((vector_size(64)))vec_t4;
typedef float __attribute__((mode(SF))) __attribute__((vector_size(128))) vec_t5;
typedef float __attribute__((mode(DF))) __attribute__((vector_size(256))) vec_t6;
void check() {
// CHECK: alloca <4 x i8>
vec_t1 v1;
// CHECK: alloca <8 x i8>
vec_t2 v2;
// CHECK: alloca <4 x i32>
vec_t3 v3;
// CHECK: alloca <8 x i64>
vec_t4 v4;
// CHECK: alloca <32 x float>
vec_t5 v5;
// CHECK: alloca <32 x double>
vec_t6 v6;
}
// CHECK: ret i32 4
int check_size1() { return sizeof(vec_t1); }
// CHECK: ret i32 8
int check_size2() { return sizeof(vec_t2); }
// CHECK: ret i32 16
int check_size3() { return sizeof(vec_t3); }
// CHECK: ret i32 64
int check_size4() { return sizeof(vec_t4); }
// CHECK: ret i32 128
int check_size5() { return sizeof(vec_t5); }
// CHECK: ret i32 256
int check_size6() { return sizeof(vec_t6); }

26
clang/test/Sema/attr-mode-vector-types.c Normal file
View File

@ -0,0 +1,26 @@
// RUN: %clang_cc1 -fsyntax-only -verify %s
// Correct cases.
typedef int __attribute__((mode(byte))) __attribute__((vector_size(256))) vec_t1;
typedef int __attribute__((mode(QI))) __attribute__((vector_size(256))) vec_t2;
typedef int __attribute__((mode(SI))) __attribute__((vector_size(256))) vec_t3;
typedef int __attribute__((mode(DI))) __attribute__((vector_size(256)))vec_t4;
typedef float __attribute__((mode(SF))) __attribute__((vector_size(256))) vec_t5;
typedef float __attribute__((mode(DF))) __attribute__((vector_size(256))) vec_t6;
typedef float __attribute__((mode(XF))) __attribute__((vector_size(256))) vec_t7;
// Incorrect cases.
typedef float __attribute__((mode(QC))) __attribute__((vector_size(256))) vec_t8;
// expected-error@-1{{unsupported machine mode 'QC'}}
// expected-error@-2{{type of machine mode does not match type of base type}}
typedef _Complex float __attribute__((mode(HC))) __attribute__((vector_size(256))) vec_t9;
// expected-error@-1{{unsupported machine mode 'HC'}}
// expected-error@-2{{invalid vector element type '_Complex float'}}
typedef int __attribute__((mode(SC))) __attribute__((vector_size(256))) vec_t10;
// expected-error@-1{{type of machine mode does not match type of base type}}
// expected-error@-2{{type of machine mode does not support base vector types}}
typedef float __attribute__((mode(DC))) __attribute__((vector_size(256))) vec_t11;
// expected-error@-1{{type of machine mode does not match type of base type}}
// expected-error@-2{{type of machine mode does not support base vector types}}
typedef _Complex float __attribute__((mode(XC))) __attribute__((vector_size(256))) vec_t12;
// expected-error@-1{{invalid vector element type '_Complex float'}}