Add support for separating strings for the split debug info DWARF5

proposal. This leaves the strings in the skeleton die as strp,
but in all dwo files they're accessed now via DW_FORM_GNU_str_index.

Add support for dumping these sections and modify the fission-cu.ll
testcase to have the correct strings and form. Fix a small bug
in the fixed form sizes routine that involved out of array accesses
for the table and add a FIXME in the extractFast routine to fix
this up.

llvm-svn: 171779

1 files changed, 5 insertions, 1 deletions

diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h
index 59e4890dec4..cc6c0f7e638 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h
@@ -240,7 +240,7 @@ public:
                  const MCSymbol *);
 
   /// \brief Emit all of the strings to the section given.
-  void emitStrings(const MCSection *);
+  void emitStrings(const MCSection *, const MCSection *, const MCSymbol *);
 
   /// \brief Returns the entry into the start of the pool.
   MCSymbol *getStringPoolSym();
@@ -249,6 +249,10 @@ public:
   /// string text.
   MCSymbol *getStringPoolEntry(StringRef Str);
 
+  /// \brief Returns the index into the string pool with the given
+  /// string text.
+  unsigned getStringPoolIndex(StringRef Str);
+
   /// \brief Returns the string pool.
   StrPool *getStringPool() { return StringPool; }
 };