Nathan-Huckleberry created this revision.
Herald added a project: clang.
Herald added a subscriber: cfe-commits.
Do not automatically self references of structs in statement expression
as warnings. Instead wait for uninitialized cfg analysis.
https://bugs.llvm.org/show_bug.cgi?id=42604
Repository:
rG LLVM Github Monorepo
https://reviews.llvm.org/D64678
Files:
clang/test/Sema/warn-uninitialized-statement-expression.c
Index: clang/test/Sema/warn-uninitialized-statement-expression.c
===================================================================
--- /dev/null
+++ clang/test/Sema/warn-uninitialized-statement-expression.c
@@ -0,0 +1,41 @@
+// RUN: %clang_cc1 -fsyntax-only -Wuninitialized -verify %s
+
+void init(int*);
+
+void foo(void) {
+ int i = ({
+ int z = i; // expected-warning{{variable 'i' is uninitialized when
used within its own initialization}}
+ init(&i);
+ i;
+ });
+}
+
+struct widget {
+ int x, y;
+};
+void init2(struct widget*);
+
+void bar(void) {
+ struct widget my_widget = ({
+ struct widget z = my_widget; // expected-warning{{variable 'my_widget'
is uninitialized when used within its own initialization}}
+ int x = my_widget.x;
+ init2(&my_widget);
+ my_widget;
+ });
+}
+
+void baz(void) {
+ struct widget a = ({
+ struct widget b = ({
+ b = a; // expected-warning{{variable 'a' is uninitialized when used
within its own initialization}}
+ });
+ a;
+ });
+}
+
+void f(void) {
+ struct widget* a = ({
+ init2(a); // expected-warning{{variable 'a' is uninitialized when used
within its own initialization}}
+ a;
+ });
+}
Index: clang/test/Sema/warn-uninitialized-statement-expression.c
===================================================================
--- /dev/null
+++ clang/test/Sema/warn-uninitialized-statement-expression.c
@@ -0,0 +1,41 @@
+// RUN: %clang_cc1 -fsyntax-only -Wuninitialized -verify %s
+
+void init(int*);
+
+void foo(void) {
+ int i = ({
+ int z = i; // expected-warning{{variable 'i' is uninitialized when used within its own initialization}}
+ init(&i);
+ i;
+ });
+}
+
+struct widget {
+ int x, y;
+};
+void init2(struct widget*);
+
+void bar(void) {
+ struct widget my_widget = ({
+ struct widget z = my_widget; // expected-warning{{variable 'my_widget' is uninitialized when used within its own initialization}}
+ int x = my_widget.x;
+ init2(&my_widget);
+ my_widget;
+ });
+}
+
+void baz(void) {
+ struct widget a = ({
+ struct widget b = ({
+ b = a; // expected-warning{{variable 'a' is uninitialized when used within its own initialization}}
+ });
+ a;
+ });
+}
+
+void f(void) {
+ struct widget* a = ({
+ init2(a); // expected-warning{{variable 'a' is uninitialized when used within its own initialization}}
+ a;
+ });
+}
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