(AT_WORD_BOUNDARY): Disable macro.

(re_match_2_internal): Work around compiler bug.

1 files changed, 46 insertions, 7 deletions

diff --git a/src/regex.c b/src/regex.c
index b4c124ae889..508a2714250 100644
--- a/src/regex.c
+++ b/src/regex.c
@@ -3444,12 +3444,14 @@ static boolean alt_match_null_string_p (),
            : (d) == string2 - 1 ? *(end1 - 1) : *(d))                   \
    == Sword)
 
+/* Disabled due to a compiler bug -- see comment at case wordbound */
+#if 0
 /* Test if the character before D and the one at D differ with respect
    to being word-constituent.  */
 #define AT_WORD_BOUNDARY(d)                                             \
   (AT_STRINGS_BEG (d) || AT_STRINGS_END (d)                             \
    || WORDCHAR_P (d - 1) != WORDCHAR_P (d))
-
+#endif
 
 /* Free everything we malloc.  */
 #ifdef MATCH_MAY_ALLOCATE
@@ -4673,17 +4675,54 @@ re_match_2_internal (bufp, string1, size1, string2, size2, pos, regs, stop)
             break;
           }
 
-        case wordbound:
-          DEBUG_PRINT1 ("EXECUTING wordbound.\n");
-          if (AT_WORD_BOUNDARY (d))
+#if 0
+        /* The DEC Alpha C compiler 3.x generates incorrect code for the
+           test  WORDCHAR_P (d - 1) != WORDCHAR_P (d)  in the expansion of
+           AT_WORD_BOUNDARY, so this code is disabled.  Expanding the
+           macro and introducing temporary variables works around the bug.  */
+
+        case wordbound:
+          DEBUG_PRINT1 ("EXECUTING wordbound.\n");
+          if (AT_WORD_BOUNDARY (d))
             break;
-          goto fail;
+          goto fail;
 
         case notwordbound:
-          DEBUG_PRINT1 ("EXECUTING notwordbound.\n");
+          DEBUG_PRINT1 ("EXECUTING notwordbound.\n");
           if (AT_WORD_BOUNDARY (d))
             goto fail;
-          break;
+          break;
+#else
+        case wordbound:
+        {
+          boolean prevchar, thischar;
+
+          DEBUG_PRINT1 ("EXECUTING wordbound.\n");
+          if (AT_STRINGS_BEG (d) || AT_STRINGS_END (d))
+            break;
+
+          prevchar = WORDCHAR_P (d - 1);
+          thischar = WORDCHAR_P (d);
+          if (prevchar != thischar)
+            break;
+          goto fail;
+        }
+
+      case notwordbound:
+        {
+          boolean prevchar, thischar;
+
+          DEBUG_PRINT1 ("EXECUTING notwordbound.\n");
+          if (AT_STRINGS_BEG (d) || AT_STRINGS_END (d))
+            goto fail;
+
+          prevchar = WORDCHAR_P (d - 1);
+          thischar = WORDCHAR_P (d);
+          if (prevchar != thischar)
+            goto fail;
+          break;
+        }
+#endif
 
         case wordbeg:
           DEBUG_PRINT1 ("EXECUTING wordbeg.\n");