[clang-reorder-fields] Use expanded location for macros

[vvuksanovic]

Fixes macros being replaced instead of their expansion.

Closes #52632

[github-actions]

Thank you for submitting a Pull Request (PR) to the LLVM Project!

This PR will be automatically labeled and the relevant teams will be notified.

If you wish to, you can add reviewers by using the "Reviewers" section on this page.

If this is not working for you, it is probably because you do not have write permissions for the repository. In which case you can instead tag reviewers by name in a comment by using @ followed by their GitHub username.

If you have received no comments on your PR for a week, you can request a review by "ping"ing the PR by adding a comment “Ping”. The common courtesy "ping" rate is once a week. Please remember that you are asking for valuable time from other developers.

If you have further questions, they may be answered by the LLVM GitHub User Guide.

You can also ask questions in a comment on this PR, on the LLVM Discord or on the forums.

[llvmbot]

@llvm/pr-subscribers-clang-tools-extra

Author: Vladimir Vuksanovic (vvuksanovic)

Changes

Fixes macros being replaced instead of their expansion.

Closes #52632

---

Full diff: https://github.com/llvm/llvm-project/pull/142147.diff

2 Files Affected:

• (modified) clang-tools-extra/clang-reorder-fields/ReorderFieldsAction.cpp (+4)
• (added) clang-tools-extra/test/clang-reorder-fields/MacroExpansionField.cpp (+24)

diff --git a/clang-tools-extra/clang-reorder-fields/ReorderFieldsAction.cpp b/clang-tools-extra/clang-reorder-fields/ReorderFieldsAction.cpp
index ea0207619fb2b..3b1cd18d80346 100644
--- a/clang-tools-extra/clang-reorder-fields/ReorderFieldsAction.cpp
+++ b/clang-tools-extra/clang-reorder-fields/ReorderFieldsAction.cpp
@@ -86,6 +86,10 @@ getNewFieldsOrder(const RecordDecl *Definition,
 static void
 addReplacement(SourceRange Old, SourceRange New, const ASTContext &Context,
                std::map<std::string, tooling::Replacements> &Replacements) {
+  if (Old.getBegin().isMacroID())
+    Old = Context.getSourceManager().getExpansionRange(Old).getAsRange();
+  if (New.getBegin().isMacroID())
+    New = Context.getSourceManager().getExpansionRange(New).getAsRange();
   StringRef NewText =
       Lexer::getSourceText(CharSourceRange::getTokenRange(New),
                            Context.getSourceManager(), Context.getLangOpts());
diff --git a/clang-tools-extra/test/clang-reorder-fields/MacroExpansionField.cpp b/clang-tools-extra/test/clang-reorder-fields/MacroExpansionField.cpp
new file mode 100644
index 0000000000000..a4c3cbc1e12f4
--- /dev/null
+++ b/clang-tools-extra/test/clang-reorder-fields/MacroExpansionField.cpp
@@ -0,0 +1,24 @@
+// RUN: clang-reorder-fields -record-name ::bar::Foo -fields-order z,y,x %s -- | FileCheck %s
+
+namespace bar {
+
+#define INT_DECL(NAME) int NAME // CHECK:      {{^#define INT_DECL\(NAME\) int NAME}}
+#define MACRO_DECL int x;       // CHECK-NEXT: {{^#define MACRO_DECL int x;}}
+
+struct Foo {
+  MACRO_DECL   // CHECK:      {{^ INT_DECL\(z\);}}
+  int y;       // CHECK-NEXT: {{^ int y;}}
+  INT_DECL(z); // CHECK-NEXT: {{^ MACRO_DECL}}
+};
+
+#define FOO 0 // CHECK:      {{^#define FOO 0}}
+#define BAR 1 // CHECK-NEXT: {{^#define BAR 1}}
+#define BAZ 2 // CHECK-NEXT: {{^#define BAZ 2}}
+
+struct Foo foo = {
+  FOO, // CHECK:      {{^ BAZ,}}
+  BAR, // CHECK-NEXT: {{^ BAR,}}
+  BAZ, // CHECK-NEXT: {{^ FOO,}}
+};
+
+} // end namespace bar

[vvuksanovic]

@alexander-shaposhnikov