sim: common: replace SIM_FILTER_PATH with lbasename

This helper macro has largely the same behavior as libiberty's lbasename.
There is a slight nuance related to colons, but it's not clear what the
point of that is, and the code implies that it just wants the basename.

sim/common/sim-assert.h

@@ -21,21 +21,6 @@
 #ifndef SIM_ASSERT_H
 #define SIM_ASSERT_H
 
-#define SIM_FILTER_PATH(FILE, PATH) \
-do \
-  { \
-    /* strip leading path */ \
-    const char *p = (PATH); \
-    (FILE) = p; \
-    while (*p != '\0' && *p != ':') \
-      { \
-        if (*p == '/') \
-          (FILE) = p + 1; \
-        p++; \
-      } \
-  } \
-while (0)
-
 /* The subtle difference between SIM_ASSERT and ASSERT is that
    SIM_ASSERT passes `sd' to sim_io_error for the SIM_DESC,
    ASSERT passes NULL.  */
@@ -43,6 +28,7 @@ while (0)
 #if !defined (SIM_ASSERT)
 #if defined (WITH_ASSERT)
 #include "sim-io.h"
+#include "libiberty.h"
 #define SIM_ASSERT(EXPRESSION) \
 do \
   { \
@@ -51,10 +37,8 @@ do \
         if (!(EXPRESSION)) \
           { \
             /* report the failure */ \
-            const char *file; \
-            SIM_FILTER_PATH(file, __FILE__); \
             sim_io_error (sd, "%s:%d: assertion failed - %s", \
-                          file, __LINE__, #EXPRESSION); \
+                          lbasename (__FILE__), __LINE__, #EXPRESSION); \
           } \
       } \
   } \
@@ -67,6 +51,7 @@ while (0)
 #if !defined (ASSERT)
 #if defined (WITH_ASSERT)
 #include "sim-io.h"
+#include "libiberty.h"
 #define ASSERT(EXPRESSION) \
 do \
   { \
@@ -75,10 +60,8 @@ do \
         if (!(EXPRESSION)) \
           { \
             /* report the failure */ \
-            const char *file; \
-            SIM_FILTER_PATH(file, __FILE__); \
             sim_io_error (NULL, "%s:%d: assertion failed - %s", \
-                          file, __LINE__, #EXPRESSION); \
+                          lbasename (__FILE__), __LINE__, #EXPRESSION); \
           } \
       } \
   } \