Allow const-qualified arg for __atomic builtins which accept that

eclipse-cdt · Mar 16, 2023 · 6ea3d70 · 6ea3d70
1 parent 3b72e60
commit 6ea3d70
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Showing 2 changed files with 31 additions and 19 deletions.
diff --git a/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/ast2/AST2Tests.java b/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/ast2/AST2Tests.java
@@ -7719,6 +7719,14 @@ public void testAtomicBuiltin_bug456131() throws Exception {
 		parseAndCheckBindings(ScannerKind.GNU);
 	}
 
+	//	const volatile int cv_var = 0;
+	//	int get() {
+	//		return __atomic_load_n(&cv_var, 0);
+	//	}
+	public void testAtomicLoadNOfConstVolatile() throws Exception {
+		parseAndCheckBindings(ScannerKind.GNU);
+	}
+
 	//	void waldo(...);
 	public void testVariadicCFunction_452416() throws Exception {
 		BindingAssertionHelper bh = getAssertionHelper(C);

diff --git a/...se.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/GCCBuiltinSymbolProvider.java b/...se.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/GCCBuiltinSymbolProvider.java
@@ -160,14 +160,15 @@ private void addGnuBuiltins() {
 		for (String type : types) {
 			// Manual does not mention volatile, however functions can be used for ptr to volatile
 			String typePtr = type + " volatile *";
-			function(type, "__atomic_load_n", typePtr, "int");
-			function("void", "__atomic_load", typePtr, typePtr, "int");
+			String typeConstPtr = type + " const volatile *";
+			function(type, "__atomic_load_n", typeConstPtr, "int");
+			function("void", "__atomic_load", typeConstPtr, typePtr, "int");
 			function("void", "__atomic_store_n", typePtr, type, "int");
 			function("void", "__atomic_store", typePtr, typePtr, "int");
 			function(type, "__atomic_exchange_n", typePtr, type, "int");
 			function("void", "__atomic_exchange", typePtr, typePtr, typePtr, "int");
-			function("bool", "__atomic_compare_exchange_n", typePtr, typePtr, type, "int", "int", "int");
-			function("bool", "__atomic_compare_exchange", typePtr, typePtr, typePtr, "int", "int", "int");
+			function("bool", "__atomic_compare_exchange_n", typePtr, typeConstPtr, type, "int", "int", "int");
+			function("bool", "__atomic_compare_exchange", typePtr, typeConstPtr, typePtr, "int", "int", "int");
 			function(type, "__atomic_add_fetch", typePtr, type, "int");
 			function(type, "__atomic_sub_fetch", typePtr, type, "int");
 			function(type, "__atomic_and_fetch", typePtr, type, "int");
@@ -608,22 +609,25 @@ private IType createType(final String type) {
 
 		boolean isConst = false;
 		boolean isVolatile = false;
-		if (tstr.startsWith("const ")) {
-			isConst = true;
-			tstr = tstr.substring(6);
-		}
-		if (tstr.endsWith("const")) {
-			isConst = true;
-			tstr = tstr.substring(0, tstr.length() - 5).trim();
-		}
-		if (tstr.startsWith("volatile ")) {
-			isVolatile = true;
-			tstr = tstr.substring(9);
-		}
-		if (tstr.endsWith("volatile")) {
-			isVolatile = true;
-			tstr = tstr.substring(0, tstr.length() - 8).trim();
+
+		while (true) {
+			if (tstr.startsWith("const ")) {
+				isConst = true;
+				tstr = tstr.substring(6);
+			} else if (tstr.endsWith("const")) {
+				isConst = true;
+				tstr = tstr.substring(0, tstr.length() - 5).trim();
+			} else if (tstr.startsWith("volatile ")) {
+				isVolatile = true;
+				tstr = tstr.substring(9);
+			} else if (tstr.endsWith("volatile")) {
+				isVolatile = true;
+				tstr = tstr.substring(0, tstr.length() - 8).trim();
+			} else {
+				break;
+			}
 		}
+
 		int q = 0;
 		if (tstr.startsWith("signed ")) {
 			q |= IBasicType.IS_SIGNED;