Fix PR rust/20110

PR rust/20110 concerns the type of an integer constant that is too
large for "i32", the default integer type.  This patch changes the
type of such a constant to i64.  This is important because such values
are often addresses, so truncating them by default is unfriendly.

Built and regtested on x86-64 Fedora 23.

2016-06-10  Tom Tromey  <tom@tromey.com>

	PR rust/20110:
	* rust-exp.y (lex_number): Don't truncate large numbers to i32.

2016-06-10  Tom Tromey  <tom@tromey.com>

	PR rust/20110:
	* gdb.rust/expr.exp: Add test for integer constant larger than
	i32.

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index c7c74fb..1a4a002 100644 (file)
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,10 @@
 2016-06-10  Tom Tromey  <tom@tromey.com>
 
+       PR rust/20110:
+       * rust-exp.y (lex_number): Don't truncate large numbers to i32.
+
+2016-06-10  Tom Tromey  <tom@tromey.com>
+
        * Makefile.in (COMMON_OBS): Remove rust-exp.o.
        (YYFILES): Add rust-exp.c.
        (YYOBJ): Add rust-exp.o.

diff --git a/gdb/rust-exp.y b/gdb/rust-exp.y
index c1a863c..aeb6058 100644 (file)
--- a/gdb/rust-exp.y
+++ b/gdb/rust-exp.y
@@ -1418,6 +1418,7 @@ lex_number (void)
   int match;
   int is_integer = 0;
   int could_be_decimal = 1;
+  int implicit_i32 = 0;
   char *type_name = NULL;
   struct type *type;
   int end_index;
@@ -1436,7 +1437,10 @@ lex_number (void)
       is_integer = 1;
       end_index = subexps[INT_TEXT].rm_eo;
       if (subexps[INT_TYPE].rm_so == -1)
-       type_name = "i32";
+       {
+         type_name = "i32";
+         implicit_i32 = 1;
+       }
       else
        {
          type_index = INT_TYPE;
@@ -1478,6 +1482,7 @@ lex_number (void)
          end_index = subexps[0].rm_eo;
          type_name = "i32";
          could_be_decimal = 1;
+         implicit_i32 = 1;
        }
     }
 
@@ -1512,6 +1517,7 @@ lex_number (void)
   /* Parse the number.  */
   if (is_integer)
     {
+      uint64_t value;
       int radix = 10;
       if (number[0] == '0')
        {
@@ -1527,7 +1533,12 @@ lex_number (void)
              could_be_decimal = 0;
            }
        }
-      rustyylval.typed_val_int.val = strtoul (number, NULL, radix);
+
+      value = strtoul (number, NULL, radix);
+      if (implicit_i32 && value >= ((uint64_t) 1) << 31)
+       type = rust_type ("i64");
+
+      rustyylval.typed_val_int.val = value;
       rustyylval.typed_val_int.type = type;
     }
   else

diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index eda7b99..7d2b144 100644 (file)
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,3 +1,9 @@
+2016-06-10  Tom Tromey  <tom@tromey.com>
+
+       PR rust/20110:
+       * gdb.rust/expr.exp: Add test for integer constant larger than
+       i32.
+
 2016-06-10  Bernhard Heckel  <bernhard.heckel@intel.com>
 
        * gdb.fortran/nested-funcs.exp: New.

diff --git a/gdb/testsuite/gdb.rust/expr.exp b/gdb/testsuite/gdb.rust/expr.exp
index 99a697e..fff3eef 100644 (file)
--- a/gdb/testsuite/gdb.rust/expr.exp
+++ b/gdb/testsuite/gdb.rust/expr.exp
@@ -104,6 +104,8 @@ gdb_test "print 1 << 5" " = 32"
 gdb_test "print 32usize >> 5" " = 1"
 gdb_test "ptype 32i32 as f64" "type = f64"
 
+gdb_test "ptype 0xf9f9f9f90000" "type = i64"
+
 gdb_test "print ()" " = \\(\\)"
 
 gdb_test "print \[1,2,3,4\]" " = \\\[1, 2, 3, 4\\\]"