* c-decl.c (build_compound_literal): Defer compound literal decls

	until until file end to emit them only if they are actually used.

	* gcc.dg/gnu89-init-2.c: New test.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@55645 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 25 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.dg/gnu89-init-2.c b/gcc/testsuite/gcc.dg/gnu89-init-2.c
new file mode 100644
index 00000000000..ce966ec8987
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/gnu89-init-2.c
@@ -0,0 +1,25 @@
+/* Test whether __compound_literal.* objects are not emitted unless
+   they are actually needed.  */
+/* Origin: Jakub Jelinek <jakub@redhat.com> */
+/* { dg-do compile } */
+/* { dg-options "-std=gnu89 -O2" } */
+/* { dg-final { scan-assembler-not "__compound_literal" } } */
+
+struct A { int i; int j; int k[4]; };
+struct B { };
+struct C { int i; };
+struct D { int i; struct C j; };
+
+struct A a = (struct A) { .j = 6, .k[2] = 12 };
+struct B b = (struct B) { };
+int c[] = (int []) { [2] = 6, 7, 8 };
+int d[] = (int [3]) { 1 };
+int e[2] = (int []) { 1, 2 };
+int f[2] = (int [2]) { 1 };
+struct C g[3] = { [2] = (struct C) { 13 }, [1] = (const struct C) { 12 } };
+struct D h = { .j = (struct C) { 15 }, .i = 14 };
+struct D i[2] = { [1].j = (const struct C) { 17 },
+		  [0] = { 0, (struct C) { 16 } } };
+static const int *j = 1 ? (const int *) 0 : & (const int) { 26 };
+int k = (int) sizeof ((int [6]) { 1, 2, 3, 4, 5, 6 }) + 4;
+int l = (int) sizeof ((struct C) { 16 });