[DWARF] Pick the DWARF5 OP_entry_value opcode on Darwin

Use the GNU extension for OP_entry_value consistently (i.e. whenever GNU
extensions are used for TAG_call_site).

llvm-svn: 369966

1 files changed, 19 insertions, 4 deletions

diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp b/llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp
index 46c8bd8a0ed..4ed452d61d5 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp
@@ -892,9 +892,13 @@ void DwarfCompileUnit::constructAbstractSubprogramScopeDIE(
     ContextCU->addDIEEntry(*AbsDef, dwarf::DW_AT_object_pointer, *ObjectPointer);
 }
 
+/// Whether to use the GNU analog for a DWARF5 tag, attribute, or location atom.
+static bool useGNUAnalogForDwarf5Feature(DwarfDebug *DD) {
+  return DD->getDwarfVersion() == 4 && DD->tuneForGDB();
+}
+
 dwarf::Tag DwarfCompileUnit::getDwarf5OrGNUCallSiteTag(dwarf::Tag Tag) const {
-  bool ApplyGNUExtensions = DD->getDwarfVersion() == 4 && DD->tuneForGDB();
-  if (!ApplyGNUExtensions)
+  if (!useGNUAnalogForDwarf5Feature(DD))
     return Tag;
   switch (Tag) {
   case dwarf::DW_TAG_call_site:
@@ -908,8 +912,7 @@ dwarf::Tag DwarfCompileUnit::getDwarf5OrGNUCallSiteTag(dwarf::Tag Tag) const {
 
 dwarf::Attribute
 DwarfCompileUnit::getDwarf5OrGNUCallSiteAttr(dwarf::Attribute Attr) const {
-  bool ApplyGNUExtensions = DD->getDwarfVersion() == 4 && DD->tuneForGDB();
-  if (!ApplyGNUExtensions)
+  if (!useGNUAnalogForDwarf5Feature(DD))
     return Attr;
   switch (Attr) {
   case dwarf::DW_AT_call_all_calls:
@@ -929,6 +932,18 @@ DwarfCompileUnit::getDwarf5OrGNUCallSiteAttr(dwarf::Attribute Attr) const {
   }
 }
 
+dwarf::LocationAtom
+DwarfCompileUnit::getDwarf5OrGNULocationAtom(dwarf::LocationAtom Loc) const {
+  if (!useGNUAnalogForDwarf5Feature(DD))
+    return Loc;
+  switch (Loc) {
+  case dwarf::DW_OP_entry_value:
+    return dwarf::DW_OP_GNU_entry_value;
+  default:
+    llvm_unreachable("DWARF5 location atom with no GNU analog");
+  }
+}
+
 DIE &DwarfCompileUnit::constructCallSiteEntryDIE(
     DIE &ScopeDIE, const DISubprogram *CalleeSP, bool IsTail,
     const MCSymbol *PCAddr, const MCExpr *PCOffset, unsigned CallReg) {