Back out 53254. It broke ppc debug info codegen.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53280 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86ATTAsmPrinter.cpp b/lib/Target/X86/X86ATTAsmPrinter.cpp
index 4e1c1df..a61bb22 100644
--- a/lib/Target/X86/X86ATTAsmPrinter.cpp
+++ b/lib/Target/X86/X86ATTAsmPrinter.cpp
@@ -232,6 +232,13 @@
   const Function *F = MF.getFunction();
   unsigned CC = F->getCallingConv();
 
+  if (TAI->doesSupportDebugInformation()) {
+    // Let PassManager know we need debug information and relay
+    // the MachineModuleInfo address on to DwarfWriter.
+    MMI = &getAnalysis<MachineModuleInfo>();
+    DW.SetModuleInfo(MMI);
+  }
+
   SetupMachineFunction(MF);
   O << "\n\n";
 
@@ -744,20 +751,13 @@
 
 /// doInitialization
 bool X86ATTAsmPrinter::doInitialization(Module &M) {
-
-  bool Result = AsmPrinter::doInitialization(M);
-
   if (TAI->doesSupportDebugInformation()) {
     // Emit initial debug information.
     DW.BeginModule(&M);
-    // Let PassManager know we need debug information and relay
-    // the MachineModuleInfo address on to DwarfWriter.
-    // AsmPrinter::doInitialization should have done this analysis.
-    MMI = getAnalysisToUpdate<MachineModuleInfo>();
-    assert(MMI);
-    DW.SetModuleInfo(MMI);
   }
 
+  bool Result = AsmPrinter::doInitialization(M);
+
   // Darwin wants symbols to be quoted if they have complex names.
   if (Subtarget->isTargetDarwin())
     Mang->setUseQuotes(true);