commit 4042ada1c1fe4a9cd546600602281686bb2270cd
author Alok Kumar Sharma <AlokKumar.Sharma@amd.com> Fri May 15 11:24:27 2020 +0530
committer Sourabh Singh Tomar <SourabhSingh.Tomar@amd.com> Fri May 15 11:33:17 2020 +0530
tree 2e7f9d3c48ab5b4964980cacde8b08d27a8863fe
parent a2545c3499a03cc1fdbd5f638f88572b23adf570

[DebugInfo] support for DW_AT_data_location in llvm

This patch adds support for DWARF attribute DW_AT_data_location.

Summary:
Dynamic arrays in fortran are described by array descriptor and
data allocation address. Former is mapped to DW_AT_location and
later is mapped to DW_AT_data_location.

Testing:
unit test cases added (hand-written)
check llvm
check debug-info

Reviewed By: aprantl

Differential Revision: https://reviews.llvm.org/D79592

llvm/lib/IR/LLVMContextImpl.h

diff --git a/llvm/lib/IR/LLVMContextImpl.h b/llvm/lib/IR/LLVMContextImpl.h
index 543f2e9..a019f1e 100644
--- a/llvm/lib/IR/LLVMContextImpl.h
+++ b/llvm/lib/IR/LLVMContextImpl.h
@@ -510,19 +510,21 @@
   Metadata *TemplateParams;
   MDString *Identifier;
   Metadata *Discriminator;
+  Metadata *DataLocation;
 
   MDNodeKeyImpl(unsigned Tag, MDString *Name, Metadata *File, unsigned Line,
                 Metadata *Scope, Metadata *BaseType, uint64_t SizeInBits,
                 uint32_t AlignInBits, uint64_t OffsetInBits, unsigned Flags,
                 Metadata *Elements, unsigned RuntimeLang,
                 Metadata *VTableHolder, Metadata *TemplateParams,
-                MDString *Identifier, Metadata *Discriminator)
+                MDString *Identifier, Metadata *Discriminator,
+                Metadata *DataLocation)
       : Tag(Tag), Name(Name), File(File), Line(Line), Scope(Scope),
         BaseType(BaseType), SizeInBits(SizeInBits), OffsetInBits(OffsetInBits),
         AlignInBits(AlignInBits), Flags(Flags), Elements(Elements),
         RuntimeLang(RuntimeLang), VTableHolder(VTableHolder),
         TemplateParams(TemplateParams), Identifier(Identifier),
-        Discriminator(Discriminator) {}
+        Discriminator(Discriminator), DataLocation(DataLocation) {}
   MDNodeKeyImpl(const DICompositeType *N)
       : Tag(N->getTag()), Name(N->getRawName()), File(N->getRawFile()),
         Line(N->getLine()), Scope(N->getRawScope()),
@@ -532,7 +534,8 @@
         RuntimeLang(N->getRuntimeLang()), VTableHolder(N->getRawVTableHolder()),
         TemplateParams(N->getRawTemplateParams()),
         Identifier(N->getRawIdentifier()),
-        Discriminator(N->getRawDiscriminator()) {}
+        Discriminator(N->getRawDiscriminator()),
+        DataLocation(N->getRawDataLocation()) {}
 
   bool isKeyOf(const DICompositeType *RHS) const {
     return Tag == RHS->getTag() && Name == RHS->getRawName() &&
@@ -546,7 +549,8 @@
            VTableHolder == RHS->getRawVTableHolder() &&
            TemplateParams == RHS->getRawTemplateParams() &&
            Identifier == RHS->getRawIdentifier() &&
-           Discriminator == RHS->getRawDiscriminator();
+           Discriminator == RHS->getRawDiscriminator() &&
+           DataLocation == RHS->getRawDataLocation();
   }
 
   unsigned getHashValue() const {