Add a way for a frontend to generate more complex dwarf location
information. This allows arbitrary code involving DW_OP_plus_uconst
and DW_OP_deref. The scheme allows for easy extention to include,
any, or all of the DW_OP_ opcodes. I thought about just exposing all
of them, but, wasn't sure if people wanted the dwarf opcodes exposed
in the api. Is that a layering violation?
With this scheme, the entire existing block scheme used by llvm-gcc
can be switched over to the new scheme. I think that would be
cleaner, as then the compiler specific bits are not present in llvm
proper. Before the old code can be yanked however, similar code in
clang would have to be removed.
Next up, more testing.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83120 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.h b/lib/CodeGen/AsmPrinter/DwarfDebug.h
index f582f9b..8899529 100644
--- a/lib/CodeGen/AsmPrinter/DwarfDebug.h
+++ b/lib/CodeGen/AsmPrinter/DwarfDebug.h
@@ -284,10 +284,20 @@
void AddAddress(DIE *Die, unsigned Attribute,
const MachineLocation &Location);
+ /// AddComplexAddress - Start with the address based on the location provided,
+ /// and generate the DWARF information necessary to find the actual variable
+ /// (navigating the extra location information encoded in the type) based on
+ /// the starting location. Add the DWARF information to the die.
+ ///
+ void AddComplexAddress(DbgVariable *&DV, DIE *Die, unsigned Attribute,
+ const MachineLocation &Location);
+
+ // FIXME: Should be reformulated in terms of AddComplexAddress.
/// AddBlockByrefAddress - Start with the address based on the location
/// provided, and generate the DWARF information necessary to find the
/// actual Block variable (navigating the Block struct) based on the
- /// starting location. Add the DWARF information to the die.
+ /// starting location. Add the DWARF information to the die. Obsolete,
+ /// please use AddComplexAddress instead.
///
void AddBlockByrefAddress(DbgVariable *&DV, DIE *Die, unsigned Attribute,
const MachineLocation &Location);
@@ -459,8 +469,9 @@
void ConstructSubprogram(MDNode *N);
+ // FIXME: This should go away in favor of complex addresses.
/// Find the type the programmer originally declared the variable to be
- /// and return that type.
+ /// and return that type. Obsolete, use GetComplexAddrType instead.
///
DIType GetBlockByrefType(DIType Ty, std::string Name);