Refactor how passes get a symbol at the end of a section.

There is now a canonical symbol at the end of a section that different
passes can request.

This also allows us to assert that we don't switch back to a section whose
end symbol has already been printed.

llvm-svn: 233026

1 files changed, 2 insertions, 9 deletions

diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index bc9a67640fb..e9ebd97dab0 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -1664,15 +1664,8 @@ void DwarfDebug::emitDebugARanges() {
     const MCSection *Section = I.first;
     MCSymbol *Sym = nullptr;
 
-    if (Section) {
-      // We can't call MCSection::getLabelEndName, as it's only safe to do so
-      // if we know the section name up-front. For user-created sections, the
-      // resulting label may not be valid to use as a label. (section names can
-      // use a greater set of characters on some systems)
-      Sym = Asm->createTempSymbol("debug_end");
-      Asm->OutStreamer.SwitchSection(Section);
-      Asm->OutStreamer.EmitLabel(Sym);
-    }
+    if (Section)
+      Sym = Asm->OutStreamer.endSection(Section);
 
     // Insert a final terminator.
     SectionMap[Section].push_back(SymbolCU(nullptr, Sym));