make the x86 backend emit darwin stubs through mcstreamer

instead of textually.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95206 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/X86/AsmPrinter/X86AsmPrinter.cpp b/lib/Target/X86/AsmPrinter/X86AsmPrinter.cpp
index 7ca786441cefa16bf2573800a28bc43ea475dc4d..5dfb30e46d5fc1e5512fd174e85482988f25a3d7 100644 (file)
--- a/lib/Target/X86/AsmPrinter/X86AsmPrinter.cpp
+++ b/lib/Target/X86/AsmPrinter/X86AsmPrinter.cpp
@@ -27,6 +27,7 @@
 #include "llvm/Type.h"
 #include "llvm/Assembly/Writer.h"
 #include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCExpr.h"
 #include "llvm/MC/MCSectionMachO.h"
 #include "llvm/MC/MCStreamer.h"
 #include "llvm/MC/MCSymbol.h"
@@ -502,14 +503,17 @@ void X86AsmPrinter::EmitEndOfAsmFile(Module &M) {
       OutStreamer.SwitchSection(TheSection);
 
       for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
-        O << *Stubs[i].first << ":\n";
-        // Get the MCSymbol without the $stub suffix.
-        O << "\t.indirect_symbol " << *Stubs[i].second;
-        O << "\n\thlt ; hlt ; hlt ; hlt ; hlt\n";
+        // L_foo$stub:
+        OutStreamer.EmitLabel(Stubs[i].first);
+        //   .indirect_symbol _foo
+        OutStreamer.EmitSymbolAttribute(Stubs[i].second, MCSA_IndirectSymbol);
+        // hlt; hlt; hlt; hlt; hlt     hlt = 0xf4 = -12.
+        const char HltInsts[] = { -12, -12, -12, -12, -12 };
+        OutStreamer.EmitBytes(StringRef(HltInsts, 5), 0/*addrspace*/);
       }
-      O << '\n';
       
       Stubs.clear();
+      OutStreamer.AddBlankLine();
     }
 
     // Output stubs for external and common global variables.
@@ -522,10 +526,15 @@ void X86AsmPrinter::EmitEndOfAsmFile(Module &M) {
       OutStreamer.SwitchSection(TheSection);
 
       for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
-        O << *Stubs[i].first << ":\n\t.indirect_symbol " << *Stubs[i].second;
-        O << "\n\t.long\t0\n";
+        // L_foo$non_lazy_ptr:
+        OutStreamer.EmitLabel(Stubs[i].first);
+        // .indirect_symbol _foo
+        OutStreamer.EmitSymbolAttribute(Stubs[i].second, MCSA_IndirectSymbol);
+        // .long 0
+        OutStreamer.EmitIntValue(0, 4/*size*/, 0/*addrspace*/);
       }
       Stubs.clear();
+      OutStreamer.AddBlankLine();
     }
 
     Stubs = MMIMacho.GetHiddenGVStubList();
@@ -536,8 +545,16 @@ void X86AsmPrinter::EmitEndOfAsmFile(Module &M) {
       for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
         O << *Stubs[i].first << ":\n" << MAI->getData32bitsDirective();
         O << *Stubs[i].second << '\n';
+        
+        // L_foo$non_lazy_ptr:
+        OutStreamer.EmitLabel(Stubs[i].first);
+        // .long _foo
+        OutStreamer.EmitValue(MCSymbolRefExpr::Create(Stubs[i].second,
+                                                      OutContext),
+                              4/*size*/, 0/*addrspace*/);
       }
       Stubs.clear();
+      OutStreamer.AddBlankLine();
     }
 
     // Funny Darwin hack: This flag tells the linker that no global symbols