[modules] Stop trying to fake up a linear MacroDirective history.

Modules builds fundamentally have a non-linear macro history. In the interest
of better source fidelity, represent the macro definition information
faithfully: we have a linear macro directive history within each module, and at
any point we have a unique "latest" local macro directive and a collection of
visible imported directives. This also removes the attendent complexity of
attempting to create a correct MacroDirective history (which we got wrong
in the general case).

No functionality change intended.

llvm-svn: 236176

1 files changed, 2 insertions, 2 deletions

diff --git a/clang/tools/libclang/CIndex.cpp b/clang/tools/libclang/CIndex.cpp
index 5a7a9cf3f69..aa5b8b0318c 100644
--- a/clang/tools/libclang/CIndex.cpp
+++ b/clang/tools/libclang/CIndex.cpp
@@ -7144,7 +7144,7 @@ MacroInfo *cxindex::getMacroInfo(const IdentifierInfo &II,
 
   ASTUnit *Unit = cxtu::getASTUnit(TU);
   Preprocessor &PP = Unit->getPreprocessor();
-  MacroDirective *MD = PP.getMacroDirectiveHistory(&II);
+  MacroDirective *MD = PP.getLocalMacroDirectiveHistory(&II);
   if (MD) {
     for (MacroDirective::DefInfo
            Def = MD->getDefinition(); Def; Def = Def.getPreviousDefinition()) {
@@ -7201,7 +7201,7 @@ MacroDefinition *cxindex::checkForMacroInMacroDefinition(const MacroInfo *MI,
   if (std::find(MI->arg_begin(), MI->arg_end(), &II) != MI->arg_end())
     return nullptr;
 
-  MacroDirective *InnerMD = PP.getMacroDirectiveHistory(&II);
+  MacroDirective *InnerMD = PP.getLocalMacroDirectiveHistory(&II);
   if (!InnerMD)
     return nullptr;