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author | Hsiangkai Wang <hsiangkai@gmail.com> | 2018-07-31 14:48:32 +0000 |
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committer | Hsiangkai Wang <hsiangkai@gmail.com> | 2018-07-31 14:48:32 +0000 |
commit | f03f9e8cd4d48a29263f9687e921fbef37c20f56 (patch) | |
tree | aacece1484ce3451d203604a83e333e1538da24e /include | |
parent | 757fc2f38e71fd4ad638f0071fae376fe3ec1a5a (diff) |
[DebugInfo] Generate DWARF debug information for labels.
There are two forms for label debug information in DWARF format.
1. Labels in a non-inlined function:
DW_TAG_label
DW_AT_name
DW_AT_decl_file
DW_AT_decl_line
DW_AT_low_pc
2. Labels in an inlined function:
DW_TAG_label
DW_AT_abstract_origin
DW_AT_low_pc
We will collect label information from DBG_LABEL. Before every DBG_LABEL,
we will generate a temporary symbol to denote the location of the label.
The symbol could be used to get DW_AT_low_pc afterwards. So, we create a
mapping between 'inlined label' and DBG_LABEL MachineInstr in DebugHandlerBase.
The DBG_LABEL in the mapping is used to query the symbol before it.
The AbstractLabels in DwarfCompileUnit is used to process labels in inlined
functions.
We also keep a mapping between scope and labels in DwarfFile to help to
generate correct tree structure of DIEs.
It also generates label debug information under global isel.
Differential Revision: https://reviews.llvm.org/D45556
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338390 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'include')
-rw-r--r-- | include/llvm/CodeGen/GlobalISel/MachineIRBuilder.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/llvm/CodeGen/GlobalISel/MachineIRBuilder.h b/include/llvm/CodeGen/GlobalISel/MachineIRBuilder.h index ac1673de5f3..9e80c78dfa0 100644 --- a/include/llvm/CodeGen/GlobalISel/MachineIRBuilder.h +++ b/include/llvm/CodeGen/GlobalISel/MachineIRBuilder.h @@ -208,6 +208,10 @@ public: const MDNode *Variable, const MDNode *Expr); + /// Build and insert a DBG_LABEL instructions specifying that \p Label is + /// given. Convert "llvm.dbg.label Label" to "DBG_LABEL Label". + MachineInstrBuilder buildDbgLabel(const MDNode *Label); + /// Build and insert \p Res = G_FRAME_INDEX \p Idx /// /// G_FRAME_INDEX materializes the address of an alloca value or other |