Initial checkin of GCC 4.9.0 from trunk (r208799).

Change-Id: I48a3c08bb98542aa215912a75f03c0890e497dba

1 files changed, 48 insertions, 0 deletions

diff --git a/gcc-4.9/gcc/testsuite/gcc.dg/const-elim-1.c b/gcc-4.9/gcc/testsuite/gcc.dg/const-elim-1.c
new file mode 100644
index 000000000..c9c57a278
--- /dev/null
+++ b/gcc-4.9/gcc/testsuite/gcc.dg/const-elim-1.c
@@ -0,0 +1,48 @@
+/* Verify that constants in memory, referenced only by dead code,
+   are not emitted to the object file.
+   FIXME: Not presently possible to apply -pedantic to code with
+   complex constants in it.  The __extension__ should shut up the
+   warning but doesn't.  (Hard to fix -- the lexer is not aware of
+   the parser's state.)  */
+
+/* { dg-do compile } */
+/* { dg-options "-O2 -std=c99" } */
+/* { dg-final { scan-assembler-not "L\\\$?C\[^A-Z\]" } } */
+
+#define I (__extension__ 1.0iF)
+
+struct S { int a; double b[2]; void *c; };
+
+extern void use_str(const char *);
+extern void use_S(const struct S *);
+extern void use_cplx(__complex__ double);
+
+static inline int
+returns_23(void) { return 23; }
+
+void
+test1(void)
+{
+	if (returns_23() == 23)
+		return;
+
+	use_str("waltz, nymph, for quick jigs vex bud");
+	use_S(&(const struct S){12, {3.1415, 2.1828}, 0 });
+	use_cplx(3.1415 + 2.1828*I);
+}
+
+void
+test2(void)
+{
+	const char *str = "pack my box with five dozen liquor jugs";
+	const struct S S = { 23, { 1.414, 1.618 }, 0 };
+	const __complex__ double cplx = 1.414 + 1.618*I;
+
+	if (returns_23() == 23)
+		return;
+
+	use_str(str);
+	use_S(&S);
+	use_cplx(cplx);
+}
+