Upgrade libcompiler_rt to upstream revision 147390.

This version of libcompiler_rt adds support for __mulo[sdt]i4(), which
computes a multiply and its overflow flag. There are also a lot of
cleanup fixes to headers that don't really affect us.

Updating to this revision should make it a bit easier to contribute
changes back to the LLVM developers.

1 files changed, 43 insertions, 0 deletions

diff --git a/contrib/compiler-rt/lib/int_util.c b/contrib/compiler-rt/lib/int_util.c
new file mode 100644
index 0000000..f194768
--- /dev/null
+++ b/contrib/compiler-rt/lib/int_util.c
@@ -0,0 +1,43 @@
+/* ===-- int_util.c - Implement internal utilities --------------------------===
+ *
+ *                     The LLVM Compiler Infrastructure
+ *
+ * This file is dual licensed under the MIT and the University of Illinois Open
+ * Source Licenses. See LICENSE.TXT for details.
+ *
+ * ===----------------------------------------------------------------------===
+ */
+
+#include "int_util.h"
+#include "int_lib.h"
+
+/* NOTE: The definitions in this file are declared weak because we clients to be
+ * able to arbitrarily package individual functions into separate .a files. If
+ * we did not declare these weak, some link situations might end up seeing
+ * duplicate strong definitions of the same symbol.
+ *
+ * We can't use this solution for kernel use (which may not support weak), but
+ * currently expect that when built for kernel use all the functionality is
+ * packaged into a single library.
+ */
+
+#ifdef KERNEL_USE
+
+extern void panic(const char *, ...) __attribute__((noreturn));
+__attribute__((visibility("hidden")))
+void compilerrt_abort_impl(const char *file, int line, const char *function) {
+  panic("%s:%d: abort in %s", file, line, function);
+}
+
+#else
+
+/* Get the system definition of abort() */
+#include <stdlib.h>
+
+__attribute__((weak))
+__attribute__((visibility("hidden")))
+void compilerrt_abort_impl(const char *file, int line, const char *function) {
+  abort();
+}
+
+#endif