Move up dwarf writer initialization in common AsmPrinter class.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73784 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/AsmPrinter/AsmPrinter.cpp

@@ -177,9 +177,17 @@ bool AsmPrinter::doInitialization(Module &M) {
 
   SwitchToDataSection("");   // Reset back to no section.
   
-  MachineModuleInfo *MMI = getAnalysisIfAvailable<MachineModuleInfo>();
-  if (MMI) MMI->AnalyzeModule(M);
-  DW = getAnalysisIfAvailable<DwarfWriter>();
+  if (TAI->doesSupportDebugInformation() 
+      || TAI->doesSupportExceptionHandling()) {
+    MachineModuleInfo *MMI = getAnalysisIfAvailable<MachineModuleInfo>();
+    if (MMI) {
+      MMI->AnalyzeModule(M);
+      DW = getAnalysisIfAvailable<DwarfWriter>();
+      if (DW)
+        DW->BeginModule(&M, MMI, O, this, TAI);
+    }
+  }
+
   return false;
 }
 

lib/Target/ARM/ARMTargetAsmInfo.cpp

@@ -52,6 +52,7 @@ ARMDarwinTargetAsmInfo::ARMDarwinTargetAsmInfo(const ARMTargetMachine &TM):
   SetDirective = "\t.set\t";
   ProtectedDirective = NULL;
   HasDotTypeDotSizeDirective = false;
+  SupportsDebugInformation = true;
 }
 
 ARMELFTargetAsmInfo::ARMELFTargetAsmInfo(const ARMTargetMachine &TM):
@@ -85,6 +86,7 @@ ARMELFTargetAsmInfo::ARMELFTargetAsmInfo(const ARMTargetMachine &TM):
     StaticCtorsSection = "\t.section .ctors,\"aw\",%progbits";
     StaticDtorsSection = "\t.section .dtors,\"aw\",%progbits";
   }
+  SupportsDebugInformation = true;
 }
 
 /// Count the number of comma-separated arguments.

lib/Target/ARM/AsmPrinter/ARMAsmPrinter.cpp

@@ -828,13 +828,7 @@ void ARMAsmPrinter::printMachineInstruction(const MachineInstr *MI) {
 bool ARMAsmPrinter::doInitialization(Module &M) {
 
   bool Result = AsmPrinter::doInitialization(M);
-
-  // Emit initial debug information.
-  MMI = getAnalysisIfAvailable<MachineModuleInfo>();
-  assert(MMI);
   DW = getAnalysisIfAvailable<DwarfWriter>();
-  assert(DW && "Dwarf Writer is not available");
-  DW->BeginModule(&M, MMI, O, this, TAI);
 
   // Thumb-2 instructions are supported only in unified assembler syntax mode.
   if (Subtarget->hasThumb2())

lib/Target/CellSPU/AsmPrinter/SPUAsmPrinter.cpp

@@ -490,12 +490,8 @@ LinuxAsmPrinter::runOnMachineFunction(MachineFunction &MF)
 
 bool LinuxAsmPrinter::doInitialization(Module &M) {
   bool Result = AsmPrinter::doInitialization(M);
-  SwitchToTextSection("\t.text");
-  // Emit initial debug information.
   DW = getAnalysisIfAvailable<DwarfWriter>();
-  assert(DW && "Dwarf Writer is not available");
-  MMI = getAnalysisIfAvailable<MachineModuleInfo>();
-  DW->BeginModule(&M, MMI, O, this, TAI);
+  SwitchToTextSection("\t.text");
   return Result;
 }
 

lib/Target/PowerPC/AsmPrinter/PPCAsmPrinter.cpp

@@ -646,16 +646,8 @@ bool PPCLinuxAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
 
 bool PPCLinuxAsmPrinter::doInitialization(Module &M) {
   bool Result = AsmPrinter::doInitialization(M);
-
-  // Emit initial debug information.
-  MMI = getAnalysisIfAvailable<MachineModuleInfo>();
-  assert(MMI);
   DW = getAnalysisIfAvailable<DwarfWriter>();
-  assert(DW && "DwarfWriter is not available");
-  DW->BeginModule(&M, MMI, O, this, TAI);
-
   SwitchToSection(TAI->getTextSection());
-
   return Result;
 }
 
@@ -872,15 +864,7 @@ bool PPCDarwinAsmPrinter::doInitialization(Module &M) {
   O << "\t.machine " << CPUDirectives[Directive] << '\n';
 
   bool Result = AsmPrinter::doInitialization(M);
-
-  // Emit initial debug information.
-  // We need this for Personality functions.
-  // AsmPrinter::doInitialization should have done this analysis.
-  MMI = getAnalysisIfAvailable<MachineModuleInfo>();
-  assert(MMI);
   DW = getAnalysisIfAvailable<DwarfWriter>();
-  assert(DW && "DwarfWriter is not available");
-  DW->BeginModule(&M, MMI, O, this, TAI);
 
   // Prime text sections so they are adjacent.  This reduces the likelihood a
   // large data or debug section causes a branch to exceed 16M limit.

lib/Target/X86/AsmPrinter/X86ATTAsmPrinter.cpp

@@ -780,19 +780,7 @@ void X86ATTAsmPrinter::printMachineInstruction(const MachineInstr *MI) {
 
 /// doInitialization
 bool X86ATTAsmPrinter::doInitialization(Module &M) {
-
-  bool Result = AsmPrinter::doInitialization(M);
-
-  if (TAI->doesSupportDebugInformation()) {
-    // Let PassManager know we need debug information and relay
-    // the MachineModuleInfo address on to DwarfWriter.
-    // AsmPrinter::doInitialization did this analysis.
-    MMI = getAnalysisIfAvailable<MachineModuleInfo>();
-    DW = getAnalysisIfAvailable<DwarfWriter>();
-    DW->BeginModule(&M, MMI, O, this, TAI);
-  }
-
-  return Result;
+  return AsmPrinter::doInitialization(M);
 }
 
 
@@ -1046,8 +1034,8 @@ bool X86ATTAsmPrinter::doFinalization(Module &M) {
     }
 
     // Emit final debug information.
-    DwarfWriter *DW = getAnalysisIfAvailable<DwarfWriter>();
-    DW->EndModule();
+    if (TAI->doesSupportDebugInformation())
+      DW->EndModule();
 
     // Funny Darwin hack: This flag tells the linker that no global symbols
     // contain code that falls through to other global symbols (e.g. the obvious
@@ -1066,12 +1054,12 @@ bool X86ATTAsmPrinter::doFinalization(Module &M) {
     }
 
     // Emit final debug information.
-    DwarfWriter *DW = getAnalysisIfAvailable<DwarfWriter>();
-    DW->EndModule();
+    if (TAI->doesSupportDebugInformation())
+      DW->EndModule();
   } else if (Subtarget->isTargetELF()) {
     // Emit final debug information.
-    DwarfWriter *DW = getAnalysisIfAvailable<DwarfWriter>();
-    DW->EndModule();
+    if (TAI->doesSupportDebugInformation())
+      DW->EndModule();
   }
 
   return AsmPrinter::doFinalization(M);

lib/Target/X86/AsmPrinter/X86ATTAsmPrinter.h

@@ -30,14 +30,13 @@ class MachineJumpTableInfo;
 class MCInst;
 
 class VISIBILITY_HIDDEN X86ATTAsmPrinter : public AsmPrinter {
-  DwarfWriter *DW;
   MachineModuleInfo *MMI;
   const X86Subtarget *Subtarget;
  public:
   explicit X86ATTAsmPrinter(raw_ostream &O, X86TargetMachine &TM,
                             const TargetAsmInfo *T, CodeGenOpt::Level OL,
                             bool V)
-    : AsmPrinter(O, TM, T, OL, V), DW(0), MMI(0) {
+    : AsmPrinter(O, TM, T, OL, V), MMI(0) {
     Subtarget = &TM.getSubtarget<X86Subtarget>();
   }
 

lib/Target/XCore/XCoreAsmPrinter.cpp

@@ -428,6 +428,7 @@ void XCoreAsmPrinter::printMachineInstruction(const MachineInstr *MI) {
 
 bool XCoreAsmPrinter::doInitialization(Module &M) {
   bool Result = AsmPrinter::doInitialization(M);
+  DW = getAnalysisIfAvailable<DwarfWriter>();
   
   if (!FileDirective.empty()) {
     emitFileDirective(FileDirective);
@@ -449,11 +450,6 @@ bool XCoreAsmPrinter::doInitialization(Module &M) {
     }
   }
 
-  // Emit initial debug information.
-  DW = getAnalysisIfAvailable<DwarfWriter>();
-  assert(DW && "Dwarf Writer is not available");
-  DW->BeginModule(&M, getAnalysisIfAvailable<MachineModuleInfo>(),
-                  O, this, TAI);
   return Result;
 }
 

lib/Target/XCore/XCoreTargetAsmInfo.cpp

@@ -24,6 +24,7 @@ using namespace llvm;
 XCoreTargetAsmInfo::XCoreTargetAsmInfo(const XCoreTargetMachine &TM)
   : ELFTargetAsmInfo(TM),
     Subtarget(TM.getSubtargetImpl()) {
+  SupportsDebugInformation = true;
   TextSection = getUnnamedSection("\t.text", SectionFlags::Code);
   DataSection = getNamedSection("\t.dp.data", SectionFlags::Writeable |
                                 SectionFlags::Small);