AutoUpgrade: upgrade from scalar TBAA format to struct-path aware TBAA format.

We treat TBAA tags as struct-path aware TBAA format when the first operand
is a MDNode and the tag has 3 or more operands.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191593 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 9 insertions, 0 deletions

diff --git a/lib/AsmParser/LLParser.cpp b/lib/AsmParser/LLParser.cpp
index 336518c..2cf2de6 100644
--- a/lib/AsmParser/LLParser.cpp
+++ b/lib/AsmParser/LLParser.cpp
@@ -19,6 +19,7 @@
 #include "llvm/IR/DerivedTypes.h"
 #include "llvm/IR/InlineAsm.h"
 #include "llvm/IR/Instructions.h"
+#include "llvm/IR/LLVMContext.h"
 #include "llvm/IR/Module.h"
 #include "llvm/IR/Operator.h"
 #include "llvm/IR/ValueSymbolTable.h"
@@ -65,6 +66,9 @@ bool LLParser::ValidateEndOfModule() {
     ForwardRefInstMetadata.clear();
   }
 
+  for (unsigned I = 0, E = InstsWithTBAATag.size(); I < E; I++)
+    UpgradeInstWithTBAATag(InstsWithTBAATag[I]);
+
   // Handle any function attribute group forward references.
   for (std::map<Value*, std::vector<unsigned> >::iterator
          I = ForwardRefAttrGroups.begin(), E = ForwardRefAttrGroups.end();
@@ -1427,6 +1431,9 @@ bool LLParser::ParseInstructionMetadata(Instruction *Inst,
       }
     }
 
+    if (MDK == LLVMContext::MD_tbaa)
+      InstsWithTBAATag.push_back(Inst);
+
     // If this is the end of the list, we're done.
   } while (EatIfPresent(lltok::comma));
   return false;
diff --git a/lib/AsmParser/LLParser.h b/lib/AsmParser/LLParser.h
index 594281e..ded776c 100644
--- a/lib/AsmParser/LLParser.h
+++ b/lib/AsmParser/LLParser.h
@@ -107,6 +107,8 @@ namespace llvm {
     };
     DenseMap<Instruction*, std::vector<MDRef> > ForwardRefInstMetadata;
 
+    SmallVector<Instruction*, 64> InstsWithTBAATag;
+
     // Type resolution handling data structures.  The location is set when we
     // have processed a use of the type but not a definition yet.
     StringMap<std::pair<Type*, LocTy> > NamedTypes;