[MC/Dwarf] Allow to specify custom parameters for linetable emission.

NFC patch for current users, but llvm-dsymutil will use the new
functionality to adapt to the input linetable.

Based on a patch by Adrian Prantl.

llvm-svn: 244318

1 files changed, 10 insertions, 6 deletions

diff --git a/llvm/lib/MC/MCObjectStreamer.cpp b/llvm/lib/MC/MCObjectStreamer.cpp
index 0a63777..3906464 100644
--- a/llvm/lib/MC/MCObjectStreamer.cpp
+++ b/llvm/lib/MC/MCObjectStreamer.cpp
@@ -321,8 +321,10 @@ static const MCExpr *buildSymbolDiff(MCObjectStreamer &OS, const MCSymbol *A,
   return AddrDelta;
 }
 
-static void emitDwarfSetLineAddr(MCObjectStreamer &OS, int64_t LineDelta,
-                                 const MCSymbol *Label, int PointerSize) {
+static void emitDwarfSetLineAddr(MCObjectStreamer &OS,
+                                 MCDwarfLineTableParams Params,
+                                 int64_t LineDelta, const MCSymbol *Label,
+                                 int PointerSize) {
   // emit the sequence to set the address
   OS.EmitIntValue(dwarf::DW_LNS_extended_op, 1);
   OS.EmitULEB128IntValue(PointerSize + 1);
@@ -330,7 +332,7 @@ static void emitDwarfSetLineAddr(MCObjectStreamer &OS, int64_t LineDelta,
   OS.EmitSymbolValue(Label, PointerSize);
 
   // emit the sequence for the LineDelta (from 1) and a zero address delta.
-  MCDwarfLineAddr::Emit(&OS, LineDelta, 0);
+  MCDwarfLineAddr::Emit(&OS, Params, LineDelta, 0);
 }
 
 void MCObjectStreamer::EmitDwarfAdvanceLineAddr(int64_t LineDelta,
@@ -338,13 +340,15 @@ void MCObjectStreamer::EmitDwarfAdvanceLineAddr(int64_t LineDelta,
                                                 const MCSymbol *Label,
                                                 unsigned PointerSize) {
   if (!LastLabel) {
-    emitDwarfSetLineAddr(*this, LineDelta, Label, PointerSize);
+    emitDwarfSetLineAddr(*this, Assembler->getDWARFLinetableParams(), LineDelta,
+                         Label, PointerSize);
     return;
   }
   const MCExpr *AddrDelta = buildSymbolDiff(*this, Label, LastLabel);
   int64_t Res;
   if (AddrDelta->evaluateAsAbsolute(Res, getAssembler())) {
-    MCDwarfLineAddr::Emit(this, LineDelta, Res);
+    MCDwarfLineAddr::Emit(this, Assembler->getDWARFLinetableParams(), LineDelta,
+                          Res);
     return;
   }
   insert(new MCDwarfLineAddrFragment(LineDelta, *AddrDelta));
@@ -451,7 +455,7 @@ void MCObjectStreamer::FinishImpl() {
     MCGenDwarfInfo::Emit(this);
 
   // Dump out the dwarf file & directory tables and line tables.
-  MCDwarfLineTable::Emit(this);
+  MCDwarfLineTable::Emit(this, getAssembler().getDWARFLinetableParams());
 
   flushPendingLabels(nullptr);
   getAssembler().Finish();