Emit relocations for DW_AT_location entries on systems which need it. This is

a recommit of r127757. Fixes PR9493. Patch by Paul Robinson!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158957 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 14 insertions, 5 deletions

diff --git a/include/llvm/CodeGen/AsmPrinter.h b/include/llvm/CodeGen/AsmPrinter.h
index 56a87f1..170a528 100644
--- a/include/llvm/CodeGen/AsmPrinter.h
+++ b/include/llvm/CodeGen/AsmPrinter.h
@@ -354,6 +354,13 @@ namespace llvm {
     void EmitLabelPlusOffset(const MCSymbol *Label, uint64_t Offset,
                                    unsigned Size) const;
 
+    /// EmitLabelReference - Emit something like ".long Label"
+    /// where the size in bytes of the directive is specified by Size and Label
+    /// specifies the label.
+    void EmitLabelReference(const MCSymbol *Label, unsigned Size) const {
+      EmitLabelPlusOffset(Label, 0, Size);
+    }
+
     //===------------------------------------------------------------------===//
     // Dwarf Emission Helper Routines
     //===------------------------------------------------------------------===//
diff --git a/include/llvm/MC/MCAsmInfo.h b/include/llvm/MC/MCAsmInfo.h
index ae0dad2..21b484c 100644
--- a/include/llvm/MC/MCAsmInfo.h
+++ b/include/llvm/MC/MCAsmInfo.h
@@ -319,9 +319,11 @@ namespace llvm {
     /// relocation when we want a section offset in dwarf.
     bool DwarfRequiresRelocationForSectionOffset;  // Defaults to true;
 
-    /// DwarfUsesLabelOffsetDifference - True if Dwarf2 output can
-    /// use EmitLabelOffsetDifference.
-    bool DwarfUsesLabelOffsetForRanges;
+    /// DwarfUsesRelocationsAcrossSections - True if Dwarf2 output generally
+    /// uses relocations for references to other .debug_* sections.
+    // FIXME: Can we replace DwarfRequiresRelocationForSectionOffset
+    // with this?
+    bool DwarfUsesRelocationsAcrossSections;
 
     /// DwarfUsesRelocationsForStringPool - True if this Dwarf output must use
     /// relocations to refer to entries in the string pool.
@@ -552,8 +554,8 @@ namespace llvm {
     bool doesDwarfRequireRelocationForSectionOffset() const {
       return DwarfRequiresRelocationForSectionOffset;
     }
-    bool doesDwarfUseLabelOffsetForRanges() const {
-      return DwarfUsesLabelOffsetForRanges;
+    bool doesDwarfUseRelocationsAcrossSections() const {
+      return DwarfUsesRelocationsAcrossSections;
     }
     bool doesDwarfUseRelocationsForStringPool() const {
       return DwarfUsesRelocationsForStringPool;