[DebugInfo] Allow getDebugThreadLocalSymbol to return MCExpr
This allows getDebugThreadLocalSymbol to return a generic MCExpr
instead of just a MCSymbolRefExpr.
This is in preparation for supporting debug info for TLS variables
on PowerPC, where we need to describe the variable location using
a more complex expression than just MCSymbolRefExpr.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185460 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp b/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp
index 398718d..e846232 100644
--- a/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp
+++ b/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp
@@ -1358,7 +1358,7 @@
unsigned PointerSize = Asm->getDataLayout().getPointerSize();
assert((PointerSize == 4 || PointerSize == 8) &&
"Add support for other sizes if necessary");
- const MCSymbolRefExpr *Ref =
+ const MCExpr *Expr =
Asm->getObjFileLowering().getDebugThreadLocalSymbol(Sym);
// Based on GCC's support for TLS:
if (!DD->useSplitDwarf()) {
@@ -1366,10 +1366,10 @@
addUInt(Block, 0, dwarf::DW_FORM_data1,
PointerSize == 4 ? dwarf::DW_OP_const4u : dwarf::DW_OP_const8u);
// 2) containing the (relocated) address of the TLS variable
- addExpr(Block, 0, dwarf::DW_FORM_udata, Ref);
+ addExpr(Block, 0, dwarf::DW_FORM_udata, Expr);
} else {
addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_GNU_const_index);
- addUInt(Block, 0, dwarf::DW_FORM_udata, DU->getAddrPoolIndex(Ref));
+ addUInt(Block, 0, dwarf::DW_FORM_udata, DU->getAddrPoolIndex(Expr));
}
// 3) followed by a custom OP to tell the debugger about TLS (presumably)
addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_lo_user);