Add a variable to track whether or not we've used a unique section,

e.g. linkonce, to TargetMachine and set it when we've done so
for ELF targets currently. This involved making TargetMachine
non-const in a TLOF use and propagating that change around - I'm
open to other ideas.

This will be used in a future commit to handle emitting debug
information with ranges.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199871 91177308-0d34-0410-b5e6-96231b3b80d8

3 files changed, 11 insertions, 7 deletions

diff --git a/include/llvm/CodeGen/TargetLoweringObjectFileImpl.h b/include/llvm/CodeGen/TargetLoweringObjectFileImpl.h
index 4e90e141ce..717ebdb2f7 100644
--- a/include/llvm/CodeGen/TargetLoweringObjectFileImpl.h
+++ b/include/llvm/CodeGen/TargetLoweringObjectFileImpl.h
@@ -53,7 +53,7 @@ public:
 
   virtual const MCSection *
   SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind,
-                         Mangler *Mang, const TargetMachine &TM) const;
+                         Mangler *Mang, TargetMachine &TM) const;
 
   /// getTTypeGlobalReference - Return an MCExpr to use for a reference to the
   /// specified type info global variable from exception handling information.
@@ -92,7 +92,7 @@ public:
 
   virtual const MCSection *
   SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind,
-                         Mangler *Mang, const TargetMachine &TM) const;
+                         Mangler *Mang, TargetMachine &TM) const;
 
   virtual const MCSection *
   getExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind,
@@ -131,7 +131,7 @@ public:
 
   virtual const MCSection *
   SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind,
-                         Mangler *Mang, const TargetMachine &TM) const;
+                         Mangler *Mang, TargetMachine &TM) const;
 
   /// getDepLibFromLinkerOpt - Extract the dependent library name from a linker
   /// option string. Returns StringRef() if the option does not specify a library.
diff --git a/include/llvm/Target/TargetLoweringObjectFile.h b/include/llvm/Target/TargetLoweringObjectFile.h
index 5bf9a13563..e7e16ace89 100644
--- a/include/llvm/Target/TargetLoweringObjectFile.h
+++ b/include/llvm/Target/TargetLoweringObjectFile.h
@@ -38,7 +38,7 @@ class TargetLoweringObjectFile : public MCObjectFileInfo {
   const DataLayout *DL;
 
   TargetLoweringObjectFile(
-    const TargetLoweringObjectFile&) LLVM_DELETED_FUNCTION;
+      const TargetLoweringObjectFile &) LLVM_DELETED_FUNCTION;
   void operator=(const TargetLoweringObjectFile&) LLVM_DELETED_FUNCTION;
 
 public:
@@ -91,14 +91,14 @@ public:
   /// be passed external (or available externally) globals.
   const MCSection *SectionForGlobal(const GlobalValue *GV,
                                     SectionKind Kind, Mangler *Mang,
-                                    const TargetMachine &TM) const;
+                                    TargetMachine &TM) const;
   
   /// SectionForGlobal - This method computes the appropriate section to emit
   /// the specified global variable or function definition.  This should not
   /// be passed external (or available externally) globals.
   const MCSection *SectionForGlobal(const GlobalValue *GV,
                                     Mangler *Mang,
-                                    const TargetMachine &TM) const {
+                                    TargetMachine &TM) const {
     return SectionForGlobal(GV, getKindForGlobal(GV, TM), Mang, TM);
   }
 
@@ -167,7 +167,7 @@ public:
 protected:
   virtual const MCSection *
   SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind,
-                         Mangler *Mang, const TargetMachine &TM) const;
+                         Mangler *Mang, TargetMachine &TM) const;
 };
 
 } // end namespace llvm
diff --git a/include/llvm/Target/TargetMachine.h b/include/llvm/Target/TargetMachine.h
index c27ffdfcd7..7cbc87d9a8 100644
--- a/include/llvm/Target/TargetMachine.h
+++ b/include/llvm/Target/TargetMachine.h
@@ -88,6 +88,7 @@ protected: // Can only create subclasses.
   unsigned MCUseLoc : 1;
   unsigned MCUseCFI : 1;
   unsigned MCUseDwarfDirectory : 1;
+  unsigned DebugUseUniqueSections : 1;
   unsigned RequireStructuredCFG : 1;
 
 public:
@@ -160,6 +161,9 @@ public:
   bool requiresStructuredCFG() const { return RequireStructuredCFG; }
   void setRequiresStructuredCFG(bool Value) { RequireStructuredCFG = Value; }
 
+  bool debugUseUniqueSections() const { return DebugUseUniqueSections; }
+  void setDebugUseUniqueSections(bool Value) { DebugUseUniqueSections = Value; }
+
   /// hasMCRelaxAll - Check whether all machine code instructions should be
   /// relaxed.
   bool hasMCRelaxAll() const { return MCRelaxAll; }