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Assorted debug info fixes.

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- DW_AT_bit_size is only suitable for bitfields.
- Encode source location info for derived types.
- Source location and type size info is not useful for subroutine_type (info is included in respective DISubprogram) and array_type.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@63077 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel 2009-01-27 00:45:04 +00:00
parent 4e1fae5125
commit ad165bec1d
2 changed files with 20 additions and 18 deletions
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36
lib/CodeGen/AsmPrinter/DwarfWriter.cpp
View File

@ -1733,8 +1733,8 @@ private:
// Add source line info if available and TyDesc is not a forward
// declaration.
// FIXME - Enable this. if (!DTy.isForwardDecl())
// FIXME - Enable this. AddSourceLine(&Buffer, *DTy);
if (!DTy.isForwardDecl())
AddSourceLine(&Buffer, &DTy);
}
/// ConstructTypeDIE - Construct type DIE from DICompositeType.
@ -1815,20 +1815,23 @@ private:
// Add name if not anonymous or intermediate type.
if (!Name.empty()) AddString(&Buffer, DW_AT_name, DW_FORM_string, Name);
// Add size if non-zero (derived types might be zero-sized.)
if (Size)
AddUInt(&Buffer, DW_AT_byte_size, 0, Size);
else {
// Add zero size if it is not a forward declaration.
if (CTy.isForwardDecl())
AddUInt(&Buffer, DW_AT_declaration, DW_FORM_flag, 1);
else
AddUInt(&Buffer, DW_AT_byte_size, 0, 0);
if (Tag == DW_TAG_enumeration_type || Tag == DW_TAG_structure_type
|| Tag == DW_TAG_union_type) {
// Add size if non-zero (derived types might be zero-sized.)
if (Size)
AddUInt(&Buffer, DW_AT_byte_size, 0, Size);
else {
// Add zero size if it is not a forward declaration.
if (CTy.isForwardDecl())
AddUInt(&Buffer, DW_AT_declaration, DW_FORM_flag, 1);
else
AddUInt(&Buffer, DW_AT_byte_size, 0, 0);
}
// Add source line info if available.
if (!CTy.isForwardDecl())
AddSourceLine(&Buffer, &CTy);
}
// Add source line info if available.
if (!CTy.isForwardDecl())
AddSourceLine(&Buffer, &CTy);
}
// ConstructSubrangeDIE - Construct subrange DIE from DISubrange.
@ -1853,7 +1856,6 @@ private:
AddUInt(&Buffer, DW_AT_GNU_vector, DW_FORM_flag, 1);
DIArray Elements = CTy->getTypeArray();
AddType(DW_Unit, &Buffer, CTy->getTypeDerivedFrom());
// Construct an anonymous type for index type.
DIE IdxBuffer(DW_TAG_base_type);
@ -1906,7 +1908,7 @@ private:
AddSourceLine(MemberDie, &DT);
AddUInt(MemberDie, DW_AT_bit_size, 0, DT.getSizeInBits());
// FIXME _ Handle bitfields
DIEBlock *Block = new DIEBlock();
AddUInt(Block, 0, DW_FORM_data1, DW_OP_plus_uconst);
AddUInt(Block, 0, DW_FORM_udata, DT.getOffsetInBits() >> 3);

2
test/DebugInfo/forwardDecl.ll
View File

@ -18,7 +18,7 @@ target triple = "i386-apple-darwin9.6"
@.str3 = internal constant [4 x i8] c"foo\00", section "llvm.metadata" ; <[4 x i8]*> [#uses=1]
@llvm.dbg.variable = internal constant %llvm.dbg.variable.type { i32 393473, { }* bitcast (%llvm.dbg.subprogram.type* @llvm.dbg.subprogram to { }*), i8* getelementptr ([2 x i8]* @.str4, i32 0, i32 0), { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*), i32 3, { }* bitcast (%llvm.dbg.derivedtype.type* @llvm.dbg.derivedtype to { }*) }, section "llvm.metadata" ; <%llvm.dbg.variable.type*> [#uses=1]
@.str4 = internal constant [2 x i8] c"x\00", section "llvm.metadata" ; <[2 x i8]*> [#uses=1]
@llvm.dbg.derivedtype = internal constant %llvm.dbg.derivedtype.type { i32 393231, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*), i8* null, { }* null, i32 0, i64 32, i64 32, i64 0, i32 0, { }* bitcast (%llvm.dbg.compositetype.type* @llvm.dbg.compositetype to { }*) }, section "llvm.metadata" ; <%llvm.dbg.derivedtype.type*> [#uses=1]
@llvm.dbg.derivedtype = internal constant %llvm.dbg.derivedtype.type { i32 393231, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*), i8* null, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*), i32 0, i64 32, i64 32, i64 0, i32 0, { }* bitcast (%llvm.dbg.compositetype.type* @llvm.dbg.compositetype to { }*) }, section "llvm.metadata" ; <%llvm.dbg.derivedtype.type*> [#uses=1]
@llvm.dbg.compositetype = internal constant %llvm.dbg.compositetype.type { i32 393235, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*), i8* getelementptr ([3 x i8]* @.str5, i32 0, i32 0), { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*), i32 1, i64 0, i64 8, i64 0, i32 4, { }* null, { }* bitcast ([0 x { }*]* @llvm.dbg.array to { }*) }, section "llvm.metadata" ; <%llvm.dbg.compositetype.type*> [#uses=1]
@.str5 = internal constant [3 x i8] c"ST\00", section "llvm.metadata" ; <[3 x i8]*> [#uses=1]
@llvm.dbg.array = internal constant [0 x { }*] zeroinitializer, section "llvm.metadata" ; <[0 x { }*]*> [#uses=1]