DebugInfo: Refactor high_pc/low_pc construction into reusable function

For incoming improvements to inlined functions and lexical blocks
suggested by Adrian Prantl in review of r203187.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203263 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 13 insertions, 6 deletions

diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index 882720fcae..e9171b00ea 100644
--- a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -412,12 +412,7 @@ DIE *DwarfDebug::updateSubprogramScopeDIE(DwarfCompileUnit *SPCU,
     }
   }
 
-  SPCU->addLabelAddress(SPDie, dwarf::DW_AT_low_pc, FunctionBeginSym);
-  if (DwarfVersion < 4 || Triple(Asm->getTargetTriple()).isOSDarwin())
-    SPCU->addLabelAddress(SPDie, dwarf::DW_AT_high_pc, FunctionEndSym);
-  else
-    SPCU->addLabelDelta(SPDie, dwarf::DW_AT_high_pc, FunctionEndSym,
-                        FunctionBeginSym);
+  attachLowHighPC(SPCU, SPDie, FunctionBeginSym, FunctionEndSym);
 
   const TargetRegisterInfo *RI = Asm->TM.getRegisterInfo();
   MachineLocation Location(RI->getFrameRegister(*Asm->MF));
@@ -2977,3 +2972,12 @@ void DwarfDebug::addDwarfTypeUnitType(DwarfCompileUnit &CU,
 
   CU.addDIETypeSignature(RefDie, *NewTU);
 }
+
+void DwarfDebug::attachLowHighPC(DwarfCompileUnit *Unit, DIE *D,
+                                 MCSymbol *Begin, MCSymbol *End) {
+  Unit->addLabelAddress(D, dwarf::DW_AT_low_pc, Begin);
+  if (DwarfVersion < 4 || Triple(Asm->getTargetTriple()).isOSDarwin())
+    Unit->addLabelAddress(D, dwarf::DW_AT_high_pc, End);
+  else
+    Unit->addLabelDelta(D, dwarf::DW_AT_high_pc, End, Begin);
+}
diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.h b/lib/CodeGen/AsmPrinter/DwarfDebug.h
index dc1607ab7e..1373e96d00 100644
--- a/lib/CodeGen/AsmPrinter/DwarfDebug.h
+++ b/lib/CodeGen/AsmPrinter/DwarfDebug.h
@@ -680,6 +680,9 @@ class DwarfDebug : public AsmPrinterHandler {
   /// \brief Return Label immediately following the instruction.
   MCSymbol *getLabelAfterInsn(const MachineInstr *MI);
 
+  void attachLowHighPC(DwarfCompileUnit *Unit, DIE *D, MCSymbol *Begin,
+                       MCSymbol *End);
+
 public:
   //===--------------------------------------------------------------------===//
   // Main entry points.