Reworked the recursive pattern matching in the JIT compiler to follow the interpreter changes.

ChangeLog

@@ -56,6 +56,9 @@ reference \1 precedes the group (abc). This fixes oss-fuzz issue 865.
 pcre2test to use it to output the frame size when the "framesize" modifier is
 given.
 
+7. Reworked the recursive pattern matching in the JIT compiler to follow the
+interpreter changes.
+
 
 Version 10.23 14-February-2017
 ------------------------------

src/pcre2_jit_test.c

@@ -707,7 +707,7 @@ static struct regression_test_case regression_test_cases[] = {
 	{ MU, A, 0, 0, "(?1)(((a(*ACCEPT)))b)", "axaa" },
 	{ MU, A, 0, 0, "(?1)(?(DEFINE) (((ac(*ACCEPT)))b) )", "akaac" },
 	{ MU, A, 0, 0, "(a+)b(?1)b\\1", "abaaabaaaaa" },
-//	  { MU, A, 0, 0 | F_NOMATCH, "(?(DEFINE)(aa|a))(?1)ab", "aab" },
+	{ MU, A, 0, 0, "(?(DEFINE)(aa|a))(?1)ab", "aab" },
 	{ MU, A, 0, 0, "(?(DEFINE)(a\\Kb))(?1)+ababc", "abababxabababc" },
 	{ MU, A, 0, 0, "(a\\Kb)(?1)+ababc", "abababxababababc" },
 	{ MU, A, 0, 0 | F_NOMATCH, "(a\\Kb)(?1)+ababc", "abababxababababxc" },
@@ -722,7 +722,7 @@ static struct regression_test_case regression_test_cases[] = {
 	{ MU, A, 0, 0, "(?P<Name>a(?(R&Name)a|b))(?1)", "aab abb abaa" },
 	{ MU, A, 0, 0, "((?(R)a|(?1)){3})", "XaaaaaaaaaX" },
 	{ MU, A, 0, 0, "((?:(?(R)a|(?1))){3})", "XaaaaaaaaaX" },
-//	  { MU, A, 0, 0, "((?(R)a|(?1)){1,3})aaaaaa", "aaaaaaaaXaaaaaaaaa" },
+	{ MU, A, 0, 0, "((?(R)a|(?1)){1,3})aaaaaa", "aaaaaaaaXaaaaaaaaa" },
 	{ MU, A, 0, 0, "((?(R)a|(?1)){1,3}?)M", "aaaM" },
 
 	/* 16 bit specific tests. */
@@ -848,7 +848,6 @@ static struct regression_test_case regression_test_cases[] = {
 	{ MU, A, 0, 0, "((a?)+)+b", "aaaaaaaaaaaa b" },
 
 	/* Deep recursion: Stack limit reached. */
-//	  { M, A, 0, 0 | F_NOMATCH, "a?a?a?a?a?a?a?a?a?a?a?a?a?a?a?a?a?a?a?a?a?a?a?aaaaaaaaaaaaaaaaaaaaaaa", "aaaaaaaaaaaaaaaaaaaaaaa" },
 	{ M, A, 0, 0 | F_NOMATCH, "a?a?a?a?a?a?a?a?a?a?a?a?a?a?a?a?a?a?a?a?a?a?a?a?aaaaaaaaaaaaaaaaaaaaaaa", "aaaaaaaaaaaaaaaaaaaaaaa" },
 	{ M, A, 0, 0 | F_NOMATCH, "(?:a+)+b", "aaaaaaaaaaaaaaaaaaaaaaaa b" },
 	{ M, A, 0, 0 | F_NOMATCH, "(?:a+?)+?b", "aaaaaaaaaaaaaaaaaaaaaaaa b" },

testdata/testinput2

@@ -4979,27 +4979,27 @@ a)"xI
 # update. They require backtracking into recursions.
 
 /^(.|(.)(?1)\2)$/
-    a\=no_jit
-    aba\=no_jit
-    abcba\=no_jit
-    ababa\=no_jit
-    abcdcba\=no_jit
+    a
+    aba
+    abcba
+    ababa
+    abcdcba
 
 /^((.)(?1)\2|.?)$/
-    a\=no_jit
-    aba\=no_jit
-    abba\=no_jit
-    abcba\=no_jit
-    ababa\=no_jit
-    abccba\=no_jit
-    abcdcba\=no_jit
-    abcddcba\=no_jit
+    a
+    aba
+    abba
+    abcba
+    ababa
+    abccba
+    abcdcba
+    abcddcba
 
 /^(.)(\1|a(?2))/
-    bab\=no_jit
+    bab
 
 /^(.|(.)(?1)?\2)$/
-    abcba\=no_jit
+    abcba
     
 # The first of these, when run by Perl, give the mark 'aa', which is wrong. 
 

testdata/testoutput2

@@ -15484,67 +15484,67 @@ Subject length lower bound = 11
 # update. They require backtracking into recursions.
 
 /^(.|(.)(?1)\2)$/
-    a\=no_jit
+    a
  0: a
  1: a
-    aba\=no_jit
+    aba
  0: aba
  1: aba
  2: a
-    abcba\=no_jit
+    abcba
  0: abcba
  1: abcba
  2: a
-    ababa\=no_jit
+    ababa
  0: ababa
  1: ababa
  2: a
-    abcdcba\=no_jit
+    abcdcba
  0: abcdcba
  1: abcdcba
  2: a
 
 /^((.)(?1)\2|.?)$/
-    a\=no_jit
+    a
  0: a
  1: a
-    aba\=no_jit
+    aba
  0: aba
  1: aba
  2: a
-    abba\=no_jit
+    abba
  0: abba
  1: abba
  2: a
-    abcba\=no_jit
+    abcba
  0: abcba
  1: abcba
  2: a
-    ababa\=no_jit
+    ababa
  0: ababa
  1: ababa
  2: a
-    abccba\=no_jit
+    abccba
  0: abccba
  1: abccba
  2: a
-    abcdcba\=no_jit
+    abcdcba
  0: abcdcba
  1: abcdcba
  2: a
-    abcddcba\=no_jit
+    abcddcba
  0: abcddcba
  1: abcddcba
  2: a
 
 /^(.)(\1|a(?2))/
-    bab\=no_jit
+    bab
  0: bab
  1: b
  2: ab
 
 /^(.|(.)(?1)?\2)$/
-    abcba\=no_jit
+    abcba
  0: abcba
  1: abcba
  2: a