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authorupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
committerupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
commit554fd8c5195424bdbcabf5de30fdc183aba391bd (patch)
tree976dc5ab7fddf506dadce60ae936f43f58787092 /gcc/testsuite/gcc.dg/weak/weak-14.c
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Diffstat (limited to 'gcc/testsuite/gcc.dg/weak/weak-14.c')
-rw-r--r--gcc/testsuite/gcc.dg/weak/weak-14.c34
1 files changed, 34 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/weak/weak-14.c b/gcc/testsuite/gcc.dg/weak/weak-14.c
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+++ b/gcc/testsuite/gcc.dg/weak/weak-14.c
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+// { dg-do run }
+// { dg-require-weak "" }
+// { dg-require-alias "" }
+// { dg-options "-O2 -fno-common" }
+
+// Copyright 2005 Free Software Foundation, Inc.
+// Contributed by Alexandre Oliva <aoliva@redhat.com>
+
+// PR middle-end/24295
+
+// The unit-at-a-time call graph code used to fail to emit variables
+// without external linkage that were only used indirectly, through
+// aliases. We might then get linker failures because the static
+// variable was not defined, or run-time errors because the weak alias
+// ended up pointing somewhere random.
+
+#include <stdlib.h>
+
+static unsigned long lv1 = 0xdeadbeefUL;
+#pragma weak Av1a = lv1
+extern unsigned long Av1a;
+
+static unsigned long lf1(void) { return 0x510bea7UL; }
+#pragma weak Af1a = lf1
+extern unsigned long Af1a(void);
+
+int main (void) {
+ if (! &Av1a
+ || ! &Af1a
+ || Av1a != 0xdeadbeefUL
+ || Af1a() != 0x510bea7UL)
+ abort ();
+ exit (0);
+}