diff options
Diffstat (limited to 'test/CodeGen/2008-07-30-redef-of-bitcasted-decl.c')
-rw-r--r-- | test/CodeGen/2008-07-30-redef-of-bitcasted-decl.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/test/CodeGen/2008-07-30-redef-of-bitcasted-decl.c b/test/CodeGen/2008-07-30-redef-of-bitcasted-decl.c new file mode 100644 index 0000000..c374f8d --- /dev/null +++ b/test/CodeGen/2008-07-30-redef-of-bitcasted-decl.c @@ -0,0 +1,28 @@ +// RUN: clang-cc --emit-llvm -o - %s +// <rdar://problem/6108358> + +/* For posterity, the issue here begins initial "char []" decl for + * s. This is a tentative definition and so a global was being + * emitted, however the mapping in GlobalDeclMap referred to a bitcast + * of this global. + * + * The problem was that later when the correct definition for s is + * emitted we were doing a RAUW on the old global which was destroying + * the bitcast in the GlobalDeclMap (since it cannot be replaced + * properly), leaving a dangling pointer. + * + * The purpose of bar is just to trigger a use of the old decl + * sometime after the dangling pointer has been introduced. + */ + +char s[]; + +static void bar(void *db) { + eek(s); +} + +char s[5] = "hi"; + +int foo() { + bar(0); +} |