From 399273e5ebac04f85257ed37934bb27f521d0617 Mon Sep 17 00:00:00 2001
From: Sourabh Singh Tomar <SourabhSingh.Tomar@amd.com>
Date: Wed, 4 Dec 2019 18:32:39 +0530
Subject: Recommit "[DebugInfo] Refactored macro related generation, added a
 test case for macinfo.dwo emission."

This was reverted in caa412090666c10f854322cdc701c1cbf8ed726e,
since it was causing an assertion failure on Windows bots.
This revision is revised to fix that.

Original commit message -

[DebugInfo] Refactored macro related generation, added a test case for macinfo.dwo emission.

Reviewers: dblaikie, aprantl, jini.susan.george

Tags: #debug-info #llvm

Differential Revision: https://reviews.llvm.org/D71008
---
 llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp | 27 ++++++++-------------------
 llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h   |  1 +
 2 files changed, 9 insertions(+), 19 deletions(-)

(limited to 'llvm/lib/CodeGen/AsmPrinter')

diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index aa33659cd06..b8905ce5c9d 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -2769,8 +2769,7 @@ void DwarfDebug::emitMacroFile(DIMacroFile &F, DwarfCompileUnit &U) {
   Asm->EmitULEB128(dwarf::DW_MACINFO_end_file);
 }
 
-/// Emit macros into a debug macinfo section.
-void DwarfDebug::emitDebugMacinfo() {
+void DwarfDebug::emitDebugMacinfoImpl(MCSection *Section) {
   for (const auto &P : CUMap) {
     auto &TheCU = *P.second;
     auto *SkCU = TheCU.getSkeleton();
@@ -2779,8 +2778,7 @@ void DwarfDebug::emitDebugMacinfo() {
     DIMacroNodeArray Macros = CUNode->getMacros();
     if (Macros.empty())
       continue;
-    Asm->OutStreamer->SwitchSection(
-        Asm->getObjFileLowering().getDwarfMacinfoSection());
+    Asm->OutStreamer->SwitchSection(Section);
     Asm->OutStreamer->EmitLabel(U.getMacroLabelBegin());
     handleMacroNodes(Macros, U);
     Asm->OutStreamer->AddComment("End Of Macro List Mark");
@@ -2788,22 +2786,13 @@ void DwarfDebug::emitDebugMacinfo() {
   }
 }
 
+/// Emit macros into a debug macinfo section.
+void DwarfDebug::emitDebugMacinfo() {
+  emitDebugMacinfoImpl(Asm->getObjFileLowering().getDwarfMacinfoSection());
+}
+
 void DwarfDebug::emitDebugMacinfoDWO() {
-  for (const auto &P : CUMap) {
-    auto &TheCU = *P.second;
-    auto *SkCU = TheCU.getSkeleton();
-    DwarfCompileUnit &U = SkCU ? *SkCU : TheCU;
-    auto *CUNode = cast<DICompileUnit>(P.first);
-    DIMacroNodeArray Macros = CUNode->getMacros();
-    if (Macros.empty())
-      continue;
-    Asm->OutStreamer->SwitchSection(
-        Asm->getObjFileLowering().getDwarfMacinfoDWOSection());
-    Asm->OutStreamer->EmitLabel(U.getMacroLabelBegin());
-    handleMacroNodes(Macros, U);
-    Asm->OutStreamer->AddComment("End Of Macro List Mark");
-    Asm->emitInt8(0);
-  }
+  emitDebugMacinfoImpl(Asm->getObjFileLowering().getDwarfMacinfoDWOSection());
 }
 
 // DWARF5 Experimental Separate Dwarf emitters.
diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h
index 8fc0ac82ff0..f90dd48458e 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h
@@ -517,6 +517,7 @@ class DwarfDebug : public DebugHandlerBase {
   void emitDebugMacinfo();
   /// Emit macros into a debug macinfo.dwo section.
   void emitDebugMacinfoDWO();
+  void emitDebugMacinfoImpl(MCSection *Section);
   void emitMacro(DIMacro &M);
   void emitMacroFile(DIMacroFile &F, DwarfCompileUnit &U);
   void handleMacroNodes(DIMacroNodeArray Nodes, DwarfCompileUnit &U);
-- 
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