https://github.com/kuilpd updated
https://github.com/llvm/llvm-project/pull/115005
>From 4d797371598960baf7729d05590aa1a8c7077694 Mon Sep 17 00:00:00 2001
From: Ilia Kuklin <ikuk...@accesssoftek.com>
Date: Mon, 4 Nov 2024 14:33:45 +0500
Subject: [PATCH 1/8] [lldb] Analyze enum promotion type during parsing
---
clang/include/clang/AST/Decl.h | 2 +-
.../SymbolFile/DWARF/DWARFASTParserClang.cpp | 95 ++++++++++++++++++-
.../TypeSystem/Clang/TypeSystemClang.cpp | 26 +----
3 files changed, 98 insertions(+), 25 deletions(-)
diff --git a/clang/include/clang/AST/Decl.h b/clang/include/clang/AST/Decl.h
index 16403774e72b31..41cb47516f5803 100644
--- a/clang/include/clang/AST/Decl.h
+++ b/clang/include/clang/AST/Decl.h
@@ -3903,6 +3903,7 @@ class EnumDecl : public TagDecl {
void setInstantiationOfMemberEnum(ASTContext &C, EnumDecl *ED,
TemplateSpecializationKind TSK);
+public:
/// Sets the width in bits required to store all the
/// non-negative enumerators of this enum.
void setNumPositiveBits(unsigned Num) {
@@ -3914,7 +3915,6 @@ class EnumDecl : public TagDecl {
/// negative enumerators of this enum. (see getNumNegativeBits)
void setNumNegativeBits(unsigned Num) { EnumDeclBits.NumNegativeBits = Num; }
-public:
/// True if this tag declaration is a scoped enumeration. Only
/// possible in C++11 mode.
void setScoped(bool Scoped = true) { EnumDeclBits.IsScoped = Scoped; }
diff --git a/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp
b/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp
index e77188bfbd2e4a..bb9c35a235c1ff 100644
--- a/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp
+++ b/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp
@@ -2316,6 +2316,8 @@ size_t DWARFASTParserClang::ParseChildEnumerators(
return 0;
size_t enumerators_added = 0;
+ unsigned NumNegativeBits = 0;
+ unsigned NumPositiveBits = 0;
for (DWARFDIE die : parent_die.children()) {
const dw_tag_t tag = die.Tag();
@@ -2367,11 +2369,102 @@ size_t DWARFASTParserClang::ParseChildEnumerators(
}
if (name && name[0] && got_value) {
- m_ast.AddEnumerationValueToEnumerationType(
+ auto ECD = m_ast.AddEnumerationValueToEnumerationType(
clang_type, decl, name, enum_value, enumerator_byte_size * 8);
++enumerators_added;
+
+ llvm::APSInt InitVal = ECD->getInitVal();
+ // Keep track of the size of positive and negative values.
+ if (InitVal.isUnsigned() || InitVal.isNonNegative()) {
+ // If the enumerator is zero that should still be counted as a positive
+ // bit since we need a bit to store the value zero.
+ unsigned ActiveBits = InitVal.getActiveBits();
+ NumPositiveBits = std::max({NumPositiveBits, ActiveBits, 1u});
+ } else {
+ NumNegativeBits =
+ std::max(NumNegativeBits, (unsigned)InitVal.getSignificantBits());
+ }
}
}
+
+ /// The following code follows the same logic as in Sema::ActOnEnumBody
+ /// clang/lib/Sema/SemaDecl.cpp
+ // If we have an empty set of enumerators we still need one bit.
+ // From [dcl.enum]p8
+ // If the enumerator-list is empty, the values of the enumeration are as if
+ // the enumeration had a single enumerator with value 0
+ if (!NumPositiveBits && !NumNegativeBits)
+ NumPositiveBits = 1;
+
+ clang::QualType qual_type(ClangUtil::GetQualType(clang_type));
+ clang::EnumDecl *enum_decl = qual_type->getAs<clang::EnumType>()->getDecl();
+ enum_decl->setNumPositiveBits(NumPositiveBits);
+ enum_decl->setNumNegativeBits(NumNegativeBits);
+
+ // C++0x N3000 [conv.prom]p3:
+ // An rvalue of an unscoped enumeration type whose underlying
+ // type is not fixed can be converted to an rvalue of the first
+ // of the following types that can represent all the values of
+ // the enumeration: int, unsigned int, long int, unsigned long
+ // int, long long int, or unsigned long long int.
+ // C99 6.4.4.3p2:
+ // An identifier declared as an enumeration constant has type int.
+ // The C99 rule is modified by C23.
+ clang::QualType BestPromotionType;
+ unsigned BestWidth;
+
+ auto &Context = m_ast.getASTContext();
+ unsigned LongWidth = Context.getTargetInfo().getLongWidth();
+ unsigned IntWidth = Context.getTargetInfo().getIntWidth();
+ unsigned CharWidth = Context.getTargetInfo().getCharWidth();
+ unsigned ShortWidth = Context.getTargetInfo().getShortWidth();
+
+ bool is_cpp = Language::LanguageIsCPlusPlus(
+ SymbolFileDWARF::GetLanguage(*parent_die.GetCU()));
+
+ if (NumNegativeBits) {
+ // If there is a negative value, figure out the smallest integer type (of
+ // int/long/longlong) that fits.
+ if (NumNegativeBits <= CharWidth && NumPositiveBits < CharWidth) {
+ BestWidth = CharWidth;
+ } else if (NumNegativeBits <= ShortWidth && NumPositiveBits < ShortWidth) {
+ BestWidth = ShortWidth;
+ } else if (NumNegativeBits <= IntWidth && NumPositiveBits < IntWidth) {
+ BestWidth = IntWidth;
+ } else if (NumNegativeBits <= LongWidth && NumPositiveBits < LongWidth) {
+ BestWidth = LongWidth;
+ } else {
+ BestWidth = Context.getTargetInfo().getLongLongWidth();
+ }
+ BestPromotionType = (BestWidth <= IntWidth ? Context.IntTy : qual_type);
+ } else {
+ // If there is no negative value, figure out the smallest type that fits
+ // all of the enumerator values.
+ if (NumPositiveBits <= CharWidth) {
+ BestPromotionType = Context.IntTy;
+ BestWidth = CharWidth;
+ } else if (NumPositiveBits <= ShortWidth) {
+ BestPromotionType = Context.IntTy;
+ BestWidth = ShortWidth;
+ } else if (NumPositiveBits <= IntWidth) {
+ BestWidth = IntWidth;
+ BestPromotionType = (NumPositiveBits == BestWidth || !is_cpp)
+ ? Context.UnsignedIntTy
+ : Context.IntTy;
+ } else if (NumPositiveBits <= LongWidth) {
+ BestWidth = LongWidth;
+ BestPromotionType = (NumPositiveBits == BestWidth || !is_cpp)
+ ? Context.UnsignedLongTy
+ : Context.LongTy;
+ } else {
+ BestWidth = Context.getTargetInfo().getLongLongWidth();
+ BestPromotionType = (NumPositiveBits == BestWidth || !is_cpp)
+ ? Context.UnsignedLongLongTy
+ : Context.LongLongTy;
+ }
+ }
+ enum_decl->setPromotionType(BestPromotionType);
+
return enumerators_added;
}
diff --git a/lldb/source/Plugins/TypeSystem/Clang/TypeSystemClang.cpp
b/lldb/source/Plugins/TypeSystem/Clang/TypeSystemClang.cpp
index 47051f2e68090f..94f99a8e360ee7 100644
--- a/lldb/source/Plugins/TypeSystem/Clang/TypeSystemClang.cpp
+++ b/lldb/source/Plugins/TypeSystem/Clang/TypeSystemClang.cpp
@@ -2321,7 +2321,6 @@ CompilerType TypeSystemClang::CreateEnumerationType(
if (decl_ctx)
decl_ctx->addDecl(enum_decl);
- // TODO: check if we should be setting the promotion type too?
enum_decl->setIntegerType(ClangUtil::GetQualType(integer_clang_type));
enum_decl->setAccess(AS_public); // TODO respect what's in the debug info
@@ -8453,30 +8452,11 @@ bool TypeSystemClang::CompleteTagDeclarationDefinition(
if (enum_decl->isCompleteDefinition())
return true;
- clang::ASTContext &ast = lldb_ast->getASTContext();
-
- /// TODO This really needs to be fixed.
-
QualType integer_type(enum_decl->getIntegerType());
if (!integer_type.isNull()) {
- unsigned NumPositiveBits = 1;
- unsigned NumNegativeBits = 0;
-
- clang::QualType promotion_qual_type;
- // If the enum integer type is less than an integer in bit width,
- // then we must promote it to an integer size.
- if (ast.getTypeSize(enum_decl->getIntegerType()) <
- ast.getTypeSize(ast.IntTy)) {
- if (enum_decl->getIntegerType()->isSignedIntegerType())
- promotion_qual_type = ast.IntTy;
- else
- promotion_qual_type = ast.UnsignedIntTy;
- } else
- promotion_qual_type = enum_decl->getIntegerType();
-
- enum_decl->completeDefinition(enum_decl->getIntegerType(),
- promotion_qual_type, NumPositiveBits,
- NumNegativeBits);
+ enum_decl->completeDefinition(
+ enum_decl->getIntegerType(), enum_decl->getPromotionType(),
+ enum_decl->getNumPositiveBits(), enum_decl->getNumNegativeBits());
}
return true;
}
>From 1ba943dd5538b1d21552df151ac107451081aa17 Mon Sep 17 00:00:00 2001
From: Ilia Kuklin <ikuk...@accesssoftek.com>
Date: Tue, 5 Nov 2024 19:18:41 +0500
Subject: [PATCH 2/8] Fix enum's underlying type retrieval
---
.../Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp
b/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp
index bb9c35a235c1ff..676cc7d7603655 100644
--- a/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp
+++ b/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp
@@ -2396,8 +2396,8 @@ size_t DWARFASTParserClang::ParseChildEnumerators(
if (!NumPositiveBits && !NumNegativeBits)
NumPositiveBits = 1;
- clang::QualType qual_type(ClangUtil::GetQualType(clang_type));
- clang::EnumDecl *enum_decl = qual_type->getAs<clang::EnumType>()->getDecl();
+ clang::EnumDecl *enum_decl =
+ ClangUtil::GetQualType(clang_type)->getAs<clang::EnumType>()->getDecl();
enum_decl->setNumPositiveBits(NumPositiveBits);
enum_decl->setNumNegativeBits(NumNegativeBits);
@@ -2436,7 +2436,8 @@ size_t DWARFASTParserClang::ParseChildEnumerators(
} else {
BestWidth = Context.getTargetInfo().getLongLongWidth();
}
- BestPromotionType = (BestWidth <= IntWidth ? Context.IntTy : qual_type);
+ BestPromotionType =
+ BestWidth <= IntWidth ? Context.IntTy : enum_decl->getIntegerType();
} else {
// If there is no negative value, figure out the smallest type that fits
// all of the enumerator values.
>From c528dd54489be9e7617d14696a6bd79da87c06e8 Mon Sep 17 00:00:00 2001
From: Ilia Kuklin <ikuk...@accesssoftek.com>
Date: Tue, 5 Nov 2024 19:19:14 +0500
Subject: [PATCH 3/8] Add a test
---
.../test/API/lang/cpp/enum_promotion/Makefile | 3 ++
.../enum_promotion/TestCPPEnumPromotion.py | 37 +++++++++++++++++++
.../test/API/lang/cpp/enum_promotion/main.cpp | 22 +++++++++++
3 files changed, 62 insertions(+)
create mode 100644 lldb/test/API/lang/cpp/enum_promotion/Makefile
create mode 100644
lldb/test/API/lang/cpp/enum_promotion/TestCPPEnumPromotion.py
create mode 100644 lldb/test/API/lang/cpp/enum_promotion/main.cpp
diff --git a/lldb/test/API/lang/cpp/enum_promotion/Makefile
b/lldb/test/API/lang/cpp/enum_promotion/Makefile
new file mode 100644
index 00000000000000..99998b20bcb050
--- /dev/null
+++ b/lldb/test/API/lang/cpp/enum_promotion/Makefile
@@ -0,0 +1,3 @@
+CXX_SOURCES := main.cpp
+
+include Makefile.rules
diff --git a/lldb/test/API/lang/cpp/enum_promotion/TestCPPEnumPromotion.py
b/lldb/test/API/lang/cpp/enum_promotion/TestCPPEnumPromotion.py
new file mode 100644
index 00000000000000..a4eed53c8d80f2
--- /dev/null
+++ b/lldb/test/API/lang/cpp/enum_promotion/TestCPPEnumPromotion.py
@@ -0,0 +1,37 @@
+"""
+Test LLDB type promotion of unscoped enums.
+"""
+
+import lldb
+from lldbsuite.test.decorators import *
+from lldbsuite.test.lldbtest import *
+from lldbsuite.test import lldbutil
+
+class TestCPPEnumPromotion(TestBase):
+
+ @skipIf(debug_info=no_match(["dwarf", "dwo"]))
+ def test(self):
+ self.build()
+ lldbutil.run_to_source_breakpoint(
+ self, "// break here", lldb.SBFileSpec("main.cpp")
+ )
+ UChar_promoted = self.frame().FindVariable("UChar_promoted")
+ UShort_promoted = self.frame().FindVariable("UShort_promoted")
+ UInt_promoted = self.frame().FindVariable("UInt_promoted")
+ SLong_promoted = self.frame().FindVariable("SLong_promoted")
+ ULong_promoted = self.frame().FindVariable("ULong_promoted")
+ NChar_promoted = self.frame().FindVariable("NChar_promoted")
+ NShort_promoted = self.frame().FindVariable("NShort_promoted")
+ NInt_promoted = self.frame().FindVariable("NInt_promoted")
+ NLong_promoted = self.frame().FindVariable("NLong_promoted")
+
+ # Check that LLDB's promoted type is the same as the compiler's
+ self.expect_expr("+EnumUChar::UChar",
result_type=UChar_promoted.type.name)
+ self.expect_expr("+EnumUShort::UShort",
result_type=UShort_promoted.type.name)
+ self.expect_expr("+EnumUInt::UInt",
result_type=UInt_promoted.type.name)
+ self.expect_expr("+EnumSLong::SLong",
result_type=SLong_promoted.type.name)
+ self.expect_expr("+EnumULong::ULong",
result_type=ULong_promoted.type.name)
+ self.expect_expr("+EnumNChar::NChar",
result_type=NChar_promoted.type.name)
+ self.expect_expr("+EnumNShort::NShort",
result_type=NShort_promoted.type.name)
+ self.expect_expr("+EnumNInt::NInt",
result_type=NInt_promoted.type.name)
+ self.expect_expr("+EnumNLong::NLong",
result_type=NLong_promoted.type.name)
diff --git a/lldb/test/API/lang/cpp/enum_promotion/main.cpp
b/lldb/test/API/lang/cpp/enum_promotion/main.cpp
new file mode 100644
index 00000000000000..fafb96f6c7b075
--- /dev/null
+++ b/lldb/test/API/lang/cpp/enum_promotion/main.cpp
@@ -0,0 +1,22 @@
+enum EnumUChar { UChar = 1 };
+enum EnumUShort { UShort = 0x101 };
+enum EnumUInt { UInt = 0x10001 };
+enum EnumSLong { SLong = 0x100000001 };
+enum EnumULong { ULong = 0xFFFFFFFFFFFFFFF0 };
+enum EnumNChar { NChar = -1 };
+enum EnumNShort { NShort= -0x101 };
+enum EnumNInt { NInt = -0x10001 };
+enum EnumNLong { NLong = -0x100000001 };
+
+int main() {
+ auto UChar_promoted = +EnumUChar::UChar;
+ auto UShort_promoted = +EnumUShort::UShort;
+ auto UInt_promoted = +EnumUInt::UInt;
+ auto SLong_promoted = +EnumSLong::SLong;
+ auto ULong_promoted = +EnumULong::ULong;
+ auto NChar_promoted = +EnumNChar::NChar;
+ auto NShort_promoted = +EnumNShort::NShort;
+ auto NInt_promoted = +EnumNInt::NInt;
+ auto NLong_promoted = +EnumNLong::NLong;
+ return 0; // break here
+}
>From 8bec472e48834cf8dcd38bd8526c7446a0f89363 Mon Sep 17 00:00:00 2001
From: Ilia Kuklin <ikuk...@accesssoftek.com>
Date: Tue, 5 Nov 2024 20:10:58 +0500
Subject: [PATCH 4/8] Fix formatting
---
lldb/test/API/lang/cpp/enum_promotion/TestCPPEnumPromotion.py | 2 +-
lldb/test/API/lang/cpp/enum_promotion/main.cpp | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/lldb/test/API/lang/cpp/enum_promotion/TestCPPEnumPromotion.py
b/lldb/test/API/lang/cpp/enum_promotion/TestCPPEnumPromotion.py
index a4eed53c8d80f2..3cf110441a0ae7 100644
--- a/lldb/test/API/lang/cpp/enum_promotion/TestCPPEnumPromotion.py
+++ b/lldb/test/API/lang/cpp/enum_promotion/TestCPPEnumPromotion.py
@@ -7,8 +7,8 @@
from lldbsuite.test.lldbtest import *
from lldbsuite.test import lldbutil
-class TestCPPEnumPromotion(TestBase):
+class TestCPPEnumPromotion(TestBase):
@skipIf(debug_info=no_match(["dwarf", "dwo"]))
def test(self):
self.build()
diff --git a/lldb/test/API/lang/cpp/enum_promotion/main.cpp
b/lldb/test/API/lang/cpp/enum_promotion/main.cpp
index fafb96f6c7b075..bcdb0adff5d401 100644
--- a/lldb/test/API/lang/cpp/enum_promotion/main.cpp
+++ b/lldb/test/API/lang/cpp/enum_promotion/main.cpp
@@ -4,7 +4,7 @@ enum EnumUInt { UInt = 0x10001 };
enum EnumSLong { SLong = 0x100000001 };
enum EnumULong { ULong = 0xFFFFFFFFFFFFFFF0 };
enum EnumNChar { NChar = -1 };
-enum EnumNShort { NShort= -0x101 };
+enum EnumNShort { NShort = -0x101 };
enum EnumNInt { NInt = -0x10001 };
enum EnumNLong { NLong = -0x100000001 };
>From 77c262dcb59913ebd591e860d7db59603e732811 Mon Sep 17 00:00:00 2001
From: Ilia Kuklin <ikuk...@accesssoftek.com>
Date: Fri, 20 Dec 2024 23:52:16 +0500
Subject: [PATCH 5/8] Move enum type and width computations to a separate
function
---
clang/include/clang/Sema/Sema.h | 7 ++
clang/lib/Sema/SemaDecl.cpp | 81 +++++++++++++++++++
.../SymbolFile/DWARF/DWARFASTParserClang.cpp | 65 ++-------------
3 files changed, 96 insertions(+), 57 deletions(-)
diff --git a/clang/include/clang/Sema/Sema.h b/clang/include/clang/Sema/Sema.h
index 4d6e02fe2956e0..39c97f0bc8fea6 100644
--- a/clang/include/clang/Sema/Sema.h
+++ b/clang/include/clang/Sema/Sema.h
@@ -3994,6 +3994,13 @@ class Sema final : public SemaBase {
SourceLocation IdLoc, IdentifierInfo *Id,
const ParsedAttributesView &Attrs,
SourceLocation EqualLoc, Expr *Val);
+
+ bool ComputeBestEnumProperties(ASTContext &Context, EnumDecl *Enum,
+ bool isCpp, bool isPacked,
+ unsigned NumNegativeBits,
+ unsigned NumPositiveBits, unsigned &BestWidth,
+ QualType &BestType,
+ QualType &BestPromotionType);
void ActOnEnumBody(SourceLocation EnumLoc, SourceRange BraceRange,
Decl *EnumDecl, ArrayRef<Decl *> Elements, Scope *S,
const ParsedAttributesView &Attr);
diff --git a/clang/lib/Sema/SemaDecl.cpp b/clang/lib/Sema/SemaDecl.cpp
index c3ff247a6316d3..6bb576eb735a19 100644
--- a/clang/lib/Sema/SemaDecl.cpp
+++ b/clang/lib/Sema/SemaDecl.cpp
@@ -20036,6 +20036,87 @@ bool Sema::IsValueInFlagEnum(const EnumDecl *ED, const
llvm::APInt &Val,
return !(FlagMask & Val) || (AllowMask && !(FlagMask & ~Val));
}
+bool Sema::ComputeBestEnumProperties(ASTContext &Context, EnumDecl *Enum,
+ bool is_cpp, bool isPacked,
+ unsigned NumNegativeBits,
+ unsigned NumPositiveBits,
+ unsigned &BestWidth, QualType &BestType,
+ QualType &BestPromotionType) {
+ unsigned IntWidth = Context.getTargetInfo().getIntWidth();
+ unsigned CharWidth = Context.getTargetInfo().getCharWidth();
+ unsigned ShortWidth = Context.getTargetInfo().getShortWidth();
+ bool enum_too_large = false;
+ if (NumNegativeBits) {
+ // If there is a negative value, figure out the smallest integer type (of
+ // int/long/longlong) that fits.
+ // If it's packed, check also if it fits a char or a short.
+ if (isPacked && NumNegativeBits <= CharWidth &&
+ NumPositiveBits < CharWidth) {
+ BestType = Context.SignedCharTy;
+ BestWidth = CharWidth;
+ } else if (isPacked && NumNegativeBits <= ShortWidth &&
+ NumPositiveBits < ShortWidth) {
+ BestType = Context.ShortTy;
+ BestWidth = ShortWidth;
+ } else if (NumNegativeBits <= IntWidth && NumPositiveBits < IntWidth) {
+ BestType = Context.IntTy;
+ BestWidth = IntWidth;
+ } else {
+ BestWidth = Context.getTargetInfo().getLongWidth();
+
+ if (NumNegativeBits <= BestWidth && NumPositiveBits < BestWidth) {
+ BestType = Context.LongTy;
+ } else {
+ BestWidth = Context.getTargetInfo().getLongLongWidth();
+
+ if (NumNegativeBits > BestWidth || NumPositiveBits >= BestWidth)
+ enum_too_large = true;
+ BestType = Context.LongLongTy;
+ }
+ }
+ BestPromotionType = (BestWidth <= IntWidth ? Context.IntTy : BestType);
+ } else {
+ // If there is no negative value, figure out the smallest type that fits
+ // all of the enumerator values.
+ // If it's packed, check also if it fits a char or a short.
+ if (isPacked && NumPositiveBits <= CharWidth) {
+ BestType = Context.UnsignedCharTy;
+ BestPromotionType = Context.IntTy;
+ BestWidth = CharWidth;
+ } else if (isPacked && NumPositiveBits <= ShortWidth) {
+ BestType = Context.UnsignedShortTy;
+ BestPromotionType = Context.IntTy;
+ BestWidth = ShortWidth;
+ } else if (NumPositiveBits <= IntWidth) {
+ BestType = Context.UnsignedIntTy;
+ BestWidth = IntWidth;
+ BestPromotionType = (NumPositiveBits == BestWidth || !is_cpp)
+ ? Context.UnsignedIntTy
+ : Context.IntTy;
+ } else if (NumPositiveBits <=
+ (BestWidth = Context.getTargetInfo().getLongWidth())) {
+ BestType = Context.UnsignedLongTy;
+ BestPromotionType = (NumPositiveBits == BestWidth || !is_cpp)
+ ? Context.UnsignedLongTy
+ : Context.LongTy;
+ } else {
+ BestWidth = Context.getTargetInfo().getLongLongWidth();
+ if (NumPositiveBits > BestWidth) {
+ // This can happen with bit-precise integer types, but those are not
+ // allowed as the type for an enumerator per C23 6.7.2.2p4 and p12.
+ // FIXME: GCC uses __int128_t and __uint128_t for cases that fit within
+ // a 128-bit integer, we should consider doing the same.
+ enum_too_large = true;
+ }
+ BestType = Context.UnsignedLongLongTy;
+ BestPromotionType = (NumPositiveBits == BestWidth || !is_cpp)
+ ? Context.UnsignedLongLongTy
+ : Context.LongLongTy;
+ }
+ }
+ return enum_too_large;
+}
+
void Sema::ActOnEnumBody(SourceLocation EnumLoc, SourceRange BraceRange,
Decl *EnumDeclX, ArrayRef<Decl *> Elements, Scope *S,
const ParsedAttributesView &Attrs) {
diff --git a/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp
b/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp
index 676cc7d7603655..2bc899e5b9edec 100644
--- a/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp
+++ b/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp
@@ -2401,69 +2401,20 @@ size_t DWARFASTParserClang::ParseChildEnumerators(
enum_decl->setNumPositiveBits(NumPositiveBits);
enum_decl->setNumNegativeBits(NumNegativeBits);
- // C++0x N3000 [conv.prom]p3:
- // An rvalue of an unscoped enumeration type whose underlying
- // type is not fixed can be converted to an rvalue of the first
- // of the following types that can represent all the values of
- // the enumeration: int, unsigned int, long int, unsigned long
- // int, long long int, or unsigned long long int.
- // C99 6.4.4.3p2:
- // An identifier declared as an enumeration constant has type int.
- // The C99 rule is modified by C23.
+ auto ts_ptr = clang_type.GetTypeSystem().dyn_cast_or_null<TypeSystemClang>();
+ if (!ts_ptr)
+ return enumerators_added;
+
clang::QualType BestPromotionType;
+ clang::QualType BestType;
unsigned BestWidth;
auto &Context = m_ast.getASTContext();
- unsigned LongWidth = Context.getTargetInfo().getLongWidth();
- unsigned IntWidth = Context.getTargetInfo().getIntWidth();
- unsigned CharWidth = Context.getTargetInfo().getCharWidth();
- unsigned ShortWidth = Context.getTargetInfo().getShortWidth();
-
bool is_cpp = Language::LanguageIsCPlusPlus(
SymbolFileDWARF::GetLanguage(*parent_die.GetCU()));
-
- if (NumNegativeBits) {
- // If there is a negative value, figure out the smallest integer type (of
- // int/long/longlong) that fits.
- if (NumNegativeBits <= CharWidth && NumPositiveBits < CharWidth) {
- BestWidth = CharWidth;
- } else if (NumNegativeBits <= ShortWidth && NumPositiveBits < ShortWidth) {
- BestWidth = ShortWidth;
- } else if (NumNegativeBits <= IntWidth && NumPositiveBits < IntWidth) {
- BestWidth = IntWidth;
- } else if (NumNegativeBits <= LongWidth && NumPositiveBits < LongWidth) {
- BestWidth = LongWidth;
- } else {
- BestWidth = Context.getTargetInfo().getLongLongWidth();
- }
- BestPromotionType =
- BestWidth <= IntWidth ? Context.IntTy : enum_decl->getIntegerType();
- } else {
- // If there is no negative value, figure out the smallest type that fits
- // all of the enumerator values.
- if (NumPositiveBits <= CharWidth) {
- BestPromotionType = Context.IntTy;
- BestWidth = CharWidth;
- } else if (NumPositiveBits <= ShortWidth) {
- BestPromotionType = Context.IntTy;
- BestWidth = ShortWidth;
- } else if (NumPositiveBits <= IntWidth) {
- BestWidth = IntWidth;
- BestPromotionType = (NumPositiveBits == BestWidth || !is_cpp)
- ? Context.UnsignedIntTy
- : Context.IntTy;
- } else if (NumPositiveBits <= LongWidth) {
- BestWidth = LongWidth;
- BestPromotionType = (NumPositiveBits == BestWidth || !is_cpp)
- ? Context.UnsignedLongTy
- : Context.LongTy;
- } else {
- BestWidth = Context.getTargetInfo().getLongLongWidth();
- BestPromotionType = (NumPositiveBits == BestWidth || !is_cpp)
- ? Context.UnsignedLongLongTy
- : Context.LongLongTy;
- }
- }
+ ts_ptr->getSema()->ComputeBestEnumProperties(
+ Context, enum_decl, is_cpp, false, NumNegativeBits, NumPositiveBits,
+ BestWidth, BestType, BestPromotionType);
enum_decl->setPromotionType(BestPromotionType);
return enumerators_added;
>From 4abfc5ab45b785580c88dfa9c2d5238dbf89d958 Mon Sep 17 00:00:00 2001
From: Ilia Kuklin <ikuk...@accesssoftek.com>
Date: Mon, 27 Jan 2025 20:29:52 +0500
Subject: [PATCH 6/8] Use computeBestEnumTypes() from ASTContext & cleanup code
---
clang/include/clang/Sema/Sema.h | 7 --
clang/lib/Sema/SemaDecl.cpp | 81 -------------------
.../SymbolFile/DWARF/DWARFASTParserClang.cpp | 20 +----
3 files changed, 2 insertions(+), 106 deletions(-)
diff --git a/clang/include/clang/Sema/Sema.h b/clang/include/clang/Sema/Sema.h
index 39c97f0bc8fea6..4d6e02fe2956e0 100644
--- a/clang/include/clang/Sema/Sema.h
+++ b/clang/include/clang/Sema/Sema.h
@@ -3994,13 +3994,6 @@ class Sema final : public SemaBase {
SourceLocation IdLoc, IdentifierInfo *Id,
const ParsedAttributesView &Attrs,
SourceLocation EqualLoc, Expr *Val);
-
- bool ComputeBestEnumProperties(ASTContext &Context, EnumDecl *Enum,
- bool isCpp, bool isPacked,
- unsigned NumNegativeBits,
- unsigned NumPositiveBits, unsigned &BestWidth,
- QualType &BestType,
- QualType &BestPromotionType);
void ActOnEnumBody(SourceLocation EnumLoc, SourceRange BraceRange,
Decl *EnumDecl, ArrayRef<Decl *> Elements, Scope *S,
const ParsedAttributesView &Attr);
diff --git a/clang/lib/Sema/SemaDecl.cpp b/clang/lib/Sema/SemaDecl.cpp
index 6bb576eb735a19..c3ff247a6316d3 100644
--- a/clang/lib/Sema/SemaDecl.cpp
+++ b/clang/lib/Sema/SemaDecl.cpp
@@ -20036,87 +20036,6 @@ bool Sema::IsValueInFlagEnum(const EnumDecl *ED, const
llvm::APInt &Val,
return !(FlagMask & Val) || (AllowMask && !(FlagMask & ~Val));
}
-bool Sema::ComputeBestEnumProperties(ASTContext &Context, EnumDecl *Enum,
- bool is_cpp, bool isPacked,
- unsigned NumNegativeBits,
- unsigned NumPositiveBits,
- unsigned &BestWidth, QualType &BestType,
- QualType &BestPromotionType) {
- unsigned IntWidth = Context.getTargetInfo().getIntWidth();
- unsigned CharWidth = Context.getTargetInfo().getCharWidth();
- unsigned ShortWidth = Context.getTargetInfo().getShortWidth();
- bool enum_too_large = false;
- if (NumNegativeBits) {
- // If there is a negative value, figure out the smallest integer type (of
- // int/long/longlong) that fits.
- // If it's packed, check also if it fits a char or a short.
- if (isPacked && NumNegativeBits <= CharWidth &&
- NumPositiveBits < CharWidth) {
- BestType = Context.SignedCharTy;
- BestWidth = CharWidth;
- } else if (isPacked && NumNegativeBits <= ShortWidth &&
- NumPositiveBits < ShortWidth) {
- BestType = Context.ShortTy;
- BestWidth = ShortWidth;
- } else if (NumNegativeBits <= IntWidth && NumPositiveBits < IntWidth) {
- BestType = Context.IntTy;
- BestWidth = IntWidth;
- } else {
- BestWidth = Context.getTargetInfo().getLongWidth();
-
- if (NumNegativeBits <= BestWidth && NumPositiveBits < BestWidth) {
- BestType = Context.LongTy;
- } else {
- BestWidth = Context.getTargetInfo().getLongLongWidth();
-
- if (NumNegativeBits > BestWidth || NumPositiveBits >= BestWidth)
- enum_too_large = true;
- BestType = Context.LongLongTy;
- }
- }
- BestPromotionType = (BestWidth <= IntWidth ? Context.IntTy : BestType);
- } else {
- // If there is no negative value, figure out the smallest type that fits
- // all of the enumerator values.
- // If it's packed, check also if it fits a char or a short.
- if (isPacked && NumPositiveBits <= CharWidth) {
- BestType = Context.UnsignedCharTy;
- BestPromotionType = Context.IntTy;
- BestWidth = CharWidth;
- } else if (isPacked && NumPositiveBits <= ShortWidth) {
- BestType = Context.UnsignedShortTy;
- BestPromotionType = Context.IntTy;
- BestWidth = ShortWidth;
- } else if (NumPositiveBits <= IntWidth) {
- BestType = Context.UnsignedIntTy;
- BestWidth = IntWidth;
- BestPromotionType = (NumPositiveBits == BestWidth || !is_cpp)
- ? Context.UnsignedIntTy
- : Context.IntTy;
- } else if (NumPositiveBits <=
- (BestWidth = Context.getTargetInfo().getLongWidth())) {
- BestType = Context.UnsignedLongTy;
- BestPromotionType = (NumPositiveBits == BestWidth || !is_cpp)
- ? Context.UnsignedLongTy
- : Context.LongTy;
- } else {
- BestWidth = Context.getTargetInfo().getLongLongWidth();
- if (NumPositiveBits > BestWidth) {
- // This can happen with bit-precise integer types, but those are not
- // allowed as the type for an enumerator per C23 6.7.2.2p4 and p12.
- // FIXME: GCC uses __int128_t and __uint128_t for cases that fit within
- // a 128-bit integer, we should consider doing the same.
- enum_too_large = true;
- }
- BestType = Context.UnsignedLongLongTy;
- BestPromotionType = (NumPositiveBits == BestWidth || !is_cpp)
- ? Context.UnsignedLongLongTy
- : Context.LongLongTy;
- }
- }
- return enum_too_large;
-}
-
void Sema::ActOnEnumBody(SourceLocation EnumLoc, SourceRange BraceRange,
Decl *EnumDeclX, ArrayRef<Decl *> Elements, Scope *S,
const ParsedAttributesView &Attrs) {
diff --git a/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp
b/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp
index 2bc899e5b9edec..6da1f93a79a2c7 100644
--- a/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp
+++ b/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp
@@ -2387,12 +2387,6 @@ size_t DWARFASTParserClang::ParseChildEnumerators(
}
}
- /// The following code follows the same logic as in Sema::ActOnEnumBody
- /// clang/lib/Sema/SemaDecl.cpp
- // If we have an empty set of enumerators we still need one bit.
- // From [dcl.enum]p8
- // If the enumerator-list is empty, the values of the enumeration are as if
- // the enumeration had a single enumerator with value 0
if (!NumPositiveBits && !NumNegativeBits)
NumPositiveBits = 1;
@@ -2401,20 +2395,10 @@ size_t DWARFASTParserClang::ParseChildEnumerators(
enum_decl->setNumPositiveBits(NumPositiveBits);
enum_decl->setNumNegativeBits(NumNegativeBits);
- auto ts_ptr = clang_type.GetTypeSystem().dyn_cast_or_null<TypeSystemClang>();
- if (!ts_ptr)
- return enumerators_added;
-
clang::QualType BestPromotionType;
clang::QualType BestType;
- unsigned BestWidth;
-
- auto &Context = m_ast.getASTContext();
- bool is_cpp = Language::LanguageIsCPlusPlus(
- SymbolFileDWARF::GetLanguage(*parent_die.GetCU()));
- ts_ptr->getSema()->ComputeBestEnumProperties(
- Context, enum_decl, is_cpp, false, NumNegativeBits, NumPositiveBits,
- BestWidth, BestType, BestPromotionType);
+ m_ast.getASTContext().computeBestEnumTypes(
+ false, NumNegativeBits, NumPositiveBits, BestType, BestPromotionType);
enum_decl->setPromotionType(BestPromotionType);
return enumerators_added;
>From e88c7e8f9198b2016d36b165c915ce05daed8629 Mon Sep 17 00:00:00 2001
From: Ilia Kuklin <ikuk...@accesssoftek.com>
Date: Mon, 27 Jan 2025 23:16:49 +0500
Subject: [PATCH 7/8] Add comments
---
.../source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp
b/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp
index 6da1f93a79a2c7..01c70a30b2f231 100644
--- a/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp
+++ b/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp
@@ -2387,6 +2387,10 @@ size_t DWARFASTParserClang::ParseChildEnumerators(
}
}
+ // If we have an empty set of enumerators we still need one bit.
+ // From [dcl.enum]p8
+ // If the enumerator-list is empty, the values of the enumeration are as if
+ // the enumeration had a single enumerator with value 0
if (!NumPositiveBits && !NumNegativeBits)
NumPositiveBits = 1;
@@ -2398,7 +2402,7 @@ size_t DWARFASTParserClang::ParseChildEnumerators(
clang::QualType BestPromotionType;
clang::QualType BestType;
m_ast.getASTContext().computeBestEnumTypes(
- false, NumNegativeBits, NumPositiveBits, BestType, BestPromotionType);
+ /*IsPacked=*/false, NumNegativeBits, NumPositiveBits, BestType,
BestPromotionType);
enum_decl->setPromotionType(BestPromotionType);
return enumerators_added;
>From 8625ab6b455f1c1ac62a0ef820bd21bb1a9e22f2 Mon Sep 17 00:00:00 2001
From: Ilia Kuklin <ikuk...@accesssoftek.com>
Date: Mon, 27 Jan 2025 23:49:02 +0500
Subject: [PATCH 8/8] Apply clang-format
---
lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp
b/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp
index 01c70a30b2f231..4b15d174717411 100644
--- a/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp
+++ b/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp
@@ -2402,7 +2402,8 @@ size_t DWARFASTParserClang::ParseChildEnumerators(
clang::QualType BestPromotionType;
clang::QualType BestType;
m_ast.getASTContext().computeBestEnumTypes(
- /*IsPacked=*/false, NumNegativeBits, NumPositiveBits, BestType,
BestPromotionType);
+ /*IsPacked=*/false, NumNegativeBits, NumPositiveBits, BestType,
+ BestPromotionType);
enum_decl->setPromotionType(BestPromotionType);
return enumerators_added;
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