[clang] [clang-c] introduce queries on GCC-style inline assembly statements (PR #143424)

[Aaron Ballman via cfe-commits]

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@@ -8648,6 +8646,119 @@ void clang_annotateTokens(CXTranslationUnit TU, CXToken *Tokens,
   }
 }
 
+//===----------------------------------------------------------------------===//
+// Operations for querying information of a GCC inline assembly block under a
+// cursor.
+//===----------------------------------------------------------------------===//
+CXString clang_Cursor_getGCCAssemblyTemplate(CXCursor Cursor) {
+  if (!clang_isStatement(Cursor.kind))
+    return cxstring::createEmpty();
+  if (auto const *Stmt = dyn_cast_or_null<GCCAsmStmt>(getCursorStmt(Cursor))) {
+    auto const &C = getCursorContext(Cursor);
+    auto AsmTemplate = Stmt->generateAsmString(C);
+    return cxstring::createDup(AsmTemplate);
+  }
+  return cxstring::createEmpty();
+}
+
+unsigned clang_Cursor_isGCCAssemblyHasGoto(CXCursor Cursor) {
+  if (!clang_isStatement(Cursor.kind))
+    return 0;
+  if (auto const *Stmt = dyn_cast_or_null<GCCAsmStmt>(getCursorStmt(Cursor))) {
+    return Stmt->isAsmGoto();
+  }
+  return 0;
+}
+
+unsigned clang_Cursor_getGCCAssemblyNumOutputs(CXCursor Cursor) {
+  if (!clang_isStatement(Cursor.kind))
+    return 0;
+  if (auto const *Stmt = dyn_cast_or_null<GCCAsmStmt>(getCursorStmt(Cursor))) {
+    return Stmt->getNumOutputs();
+  }
+  return 0;
+}
+
+unsigned clang_Cursor_getGCCAssemblyNumInputs(CXCursor Cursor) {
+  if (!clang_isStatement(Cursor.kind))
+    return 0;
+  if (auto const *Stmt = dyn_cast_or_null<GCCAsmStmt>(getCursorStmt(Cursor))) {
+    return Stmt->getNumInputs();
+  }
+  return 0;
+}
+
+unsigned clang_Cursor_getGCCAssemblyInput(CXCursor Cursor, unsigned Index,
+                                          CXString *Constraint,
+                                          CXCursor *Expr) {
+  if (!clang_isStatement(Cursor.kind) || !Constraint || !Expr)
+    return 0;
+  if (auto const *Stmt = dyn_cast_or_null<GCCAsmStmt>(getCursorStmt(Cursor));
+      Stmt && Index < Stmt->getNumInputs()) {
+    auto Constraint_ = Stmt->getInputConstraint(Index);
+    auto const *Expr_ = Stmt->getInputExpr(Index);
----------------
AaronBallman wrote:

Same here about `auto`, but also, try to pick names without a trailing underscore a well (which don't conflict with type names, like `Expr`).

https://github.com/llvm/llvm-project/pull/143424