From 222e2a7620e6520ffaf4fc4e69d79c18da31542e Mon Sep 17 00:00:00 2001 From: "Zancanaro; Carlo" Date: Mon, 24 Sep 2012 09:58:17 +1000 Subject: Add the clang library to the repo (with some of my changes, too). --- .../CodeGen/2008-07-30-redef-of-bitcasted-decl.c | 28 ++++++++++++++++++++++ 1 file changed, 28 insertions(+) create mode 100644 clang/test/CodeGen/2008-07-30-redef-of-bitcasted-decl.c (limited to 'clang/test/CodeGen/2008-07-30-redef-of-bitcasted-decl.c') diff --git a/clang/test/CodeGen/2008-07-30-redef-of-bitcasted-decl.c b/clang/test/CodeGen/2008-07-30-redef-of-bitcasted-decl.c new file mode 100644 index 0000000..546590e --- /dev/null +++ b/clang/test/CodeGen/2008-07-30-redef-of-bitcasted-decl.c @@ -0,0 +1,28 @@ +// RUN: %clang_cc1 -emit-llvm -o - %s +// + +/* 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); +} -- cgit v1.2.3