Workaround an MSan false positive.
llvm-svn: 175156
diff --git a/llvm/lib/Support/Unix/Process.inc b/llvm/lib/Support/Unix/Process.inc
index 1335b78..9a4454f 100644
--- a/llvm/lib/Support/Unix/Process.inc
+++ b/llvm/lib/Support/Unix/Process.inc
@@ -224,6 +224,8 @@
#if defined(HAVE_SYS_IOCTL_H) && defined(HAVE_TERMIOS_H)
// Try to determine the width of the terminal.
struct winsize ws;
+ // Zero-fill ws to avoid a false positive from MemorySanitizer.
+ memset(&ws, 0, sizeof(ws));
if (ioctl(FileID, TIOCGWINSZ, &ws) == 0)
Columns = ws.ws_col;
#endif