Turn off .debug_pubnames/pubtypes for PS4.

[dblaikie]

LGTM, please commit

[probinson]

r231322. Didn't Phab used to put the revision number in its email?

lib/CodeGen/AsmPrinter/DwarfDebug.cpp

DwarfDebug::DwarfDebug(AsmPrinter *A, Module *M)
   DwarfLineSectionSym = nullptr;
   DwarfAddrSectionSym = nullptr;
   DwarfAbbrevDWOSectionSym = DwarfStrDWOSectionSym = nullptr;
   FunctionBeginSym = FunctionEndSym = nullptr;
   CurFn = nullptr;
   CurMI = nullptr;
 
   // Turn on accelerator tables for Darwin by default, pubnames by
-  // default for non-Darwin, and handle split dwarf.
+  // default for non-Darwin/PS4, and handle split dwarf.
   if (DwarfAccelTables == Default)
     HasDwarfAccelTables = IsDarwin;
   else
     HasDwarfAccelTables = DwarfAccelTables == Enable;
 
   if (SplitDwarf == Default)
     HasSplitDwarf = false;
   else
     HasSplitDwarf = SplitDwarf == Enable;
 
   if (DwarfPubSections == Default)
-    HasDwarfPubSections = !IsDarwin;
+    HasDwarfPubSections = !IsDarwin && !IsPS4;
   else
     HasDwarfPubSections = DwarfPubSections == Enable;
 
   unsigned DwarfVersionNumber = Asm->TM.Options.MCOptions.DwarfVersion;
   DwarfVersion = DwarfVersionNumber ? DwarfVersionNumber
                                     : MMI->getModule()->getDwarfVersion();
 
   // Darwin and PS4 use the standard TLS opcode (defined in DWARF 3).

test/DebugInfo/X86/dwarf-public-names.ll

 ; RUN: llc -mtriple=x86_64-pc-linux-gnu -filetype=obj -o %t.o < %s
 ; RUN: llvm-dwarfdump -debug-dump=pubnames %t.o | FileCheck --check-prefix=LINUX %s
 ; RUN: llc -mtriple=x86_64-apple-darwin12 -filetype=obj -o %t.o < %s
-; RUN: llvm-dwarfdump -debug-dump=pubnames %t.o | FileCheck --check-prefix=DARWIN %s
+; RUN: llvm-dwarfdump -debug-dump=pubnames %t.o | FileCheck --check-prefix=NOPUB %s
+; RUN: llc -mtriple=x86_64-scei-ps4 -filetype=obj -o %t.o < %s
+; RUN: llvm-dwarfdump -debug-dump=pubnames %t.o | FileCheck --check-prefix=NOPUB %s
 ; ModuleID = 'dwarf-public-names.cpp'
 ;
 ; Generated from:
 ;
 ; struct C {
 ;   void member_function();
 ;   static int static_member_function();
 ;   static int static_member_variable;

 ;
 ; namespace ns {
 ;   void global_namespace_function() {
 ;     global_variable.member_function();
 ;   }
 ;   int global_namespace_variable = 1;
 ; }
 
-; Darwin shouldn't be generating the section by default
-; DARWIN: debug_pubnames
-; DARWIN: {{^$}}
+; Darwin and PS4 shouldn't be generating the section by default
+; NOPUB: debug_pubnames
+; NOPUB: {{^$}}
 
 ; Skip the output to the header of the pubnames section.
 ; LINUX: debug_pubnames
 ; LINUX: unit_size = 0x00000128
 
 ; Check for each name in the output.
 ; LINUX-DAG: "ns"
 ; LINUX-DAG: "C::static_member_function"