[NFC] Extract method to SourceManager for traversing the macro "stack"
The code for going up the macro arg expansion is duplicated in many
places (and we need it for the analyzer as well, so I did not want to
duplicate it two more times).
This patch is an NFC, so the semantics should remain the same.
Differential Revision: https://reviews.llvm.org/D42458
llvm-svn: 324780
diff --git a/clang/include/clang/Basic/SourceManager.h b/clang/include/clang/Basic/SourceManager.h
index fe5aeda..17601b8 100644
--- a/clang/include/clang/Basic/SourceManager.h
+++ b/clang/include/clang/Basic/SourceManager.h
@@ -1646,6 +1646,9 @@
return getImmediateExpansionRange(Loc).first;
}
+ /// \return Location of the top-level macro caller.
+ SourceLocation getTopMacroCallerLoc(SourceLocation Loc) const;
+
private:
friend class ASTReader;
friend class ASTWriter;
diff --git a/clang/lib/Basic/SourceManager.cpp b/clang/lib/Basic/SourceManager.cpp
index 0a51985..3bf70b6 100644
--- a/clang/lib/Basic/SourceManager.cpp
+++ b/clang/lib/Basic/SourceManager.cpp
@@ -955,6 +955,12 @@
return Expansion.getExpansionLocRange();
}
+SourceLocation SourceManager::getTopMacroCallerLoc(SourceLocation Loc) const {
+ while (isMacroArgExpansion(Loc))
+ Loc = getImmediateSpellingLoc(Loc);
+ return Loc;
+}
+
/// getExpansionRange - Given a SourceLocation object, return the range of
/// tokens covered by the expansion in the ultimate file.
std::pair<SourceLocation,SourceLocation>
diff --git a/clang/lib/Edit/Commit.cpp b/clang/lib/Edit/Commit.cpp
index cb7a784..0cc152b 100644
--- a/clang/lib/Edit/Commit.cpp
+++ b/clang/lib/Edit/Commit.cpp
@@ -225,8 +225,7 @@
isAtStartOfMacroExpansion(loc, &loc);
const SourceManager &SM = SourceMgr;
- while (SM.isMacroArgExpansion(loc))
- loc = SM.getImmediateSpellingLoc(loc);
+ loc = SM.getTopMacroCallerLoc(loc);
if (loc.isMacroID())
if (!isAtStartOfMacroExpansion(loc, &loc))
@@ -256,8 +255,7 @@
isAtEndOfMacroExpansion(loc, &loc);
const SourceManager &SM = SourceMgr;
- while (SM.isMacroArgExpansion(loc))
- loc = SM.getImmediateSpellingLoc(loc);
+ loc = SM.getTopMacroCallerLoc(loc);
if (loc.isMacroID())
if (!isAtEndOfMacroExpansion(loc, &loc))
diff --git a/clang/lib/Sema/SemaChecking.cpp b/clang/lib/Sema/SemaChecking.cpp
index 8f6eef5..8f6fa10 100644
--- a/clang/lib/Sema/SemaChecking.cpp
+++ b/clang/lib/Sema/SemaChecking.cpp
@@ -9357,11 +9357,8 @@
// Venture through the macro stacks to get to the source of macro arguments.
// The new location is a better location than the complete location that was
// passed in.
- while (S.SourceMgr.isMacroArgExpansion(Loc))
- Loc = S.SourceMgr.getImmediateMacroCallerLoc(Loc);
-
- while (S.SourceMgr.isMacroArgExpansion(CC))
- CC = S.SourceMgr.getImmediateMacroCallerLoc(CC);
+ Loc = S.SourceMgr.getTopMacroCallerLoc(Loc);
+ CC = S.SourceMgr.getTopMacroCallerLoc(CC);
// __null is usually wrapped in a macro. Go up a macro if that is the case.
if (NullKind == Expr::NPCK_GNUNull && Loc.isMacroID()) {