Mark functions as __dead2 in order to help the LLVM static checker

understand which code paths aren't possible.

This commit eliminates 117 false positive bug reports of the form
"allocate memory; error out if pointer is NULL; use pointer".

3 files changed, 3 insertions, 3 deletions

diff --git a/bin/echo/echo.c b/bin/echo/echo.c
index 45d9d7e..68ff581 100644
--- a/bin/echo/echo.c
+++ b/bin/echo/echo.c
@@ -55,7 +55,7 @@ __FBSDID("$FreeBSD$");
  * Report an error and exit.
  * Use it instead of err(3) to avoid linking-in stdio.
  */
-static void
+static __dead2 void
 errexit(const char *prog, const char *reason)
 {
 	char *errstr = strerror(errno);
diff --git a/bin/sh/mknodes.c b/bin/sh/mknodes.c
index 53086bd..f0afca6 100644
--- a/bin/sh/mknodes.c
+++ b/bin/sh/mknodes.c
@@ -103,7 +103,7 @@ static void indent(int, FILE *);
 static int nextfield(char *);
 static void skipbl(void);
 static int readline(void);
-static void error(const char *, ...) __printf0like(1, 2);
+static void error(const char *, ...) __printf0like(1, 2) __dead2;
 static char *savestr(const char *);
 
 
diff --git a/bin/stty/gfmt.c b/bin/stty/gfmt.c
index c35a6fc..339da59 100644
--- a/bin/stty/gfmt.c
+++ b/bin/stty/gfmt.c
@@ -44,7 +44,7 @@ __FBSDID("$FreeBSD$");
 #include "stty.h"
 #include "extern.h"
 
-static void gerr(const char *s);
+static void gerr(const char *s) __dead2;
 
 static void
 gerr(const char *s)