gdb/fortran: Support for single/double type modifiers

Extend the Fortran parser to support 'single precision' and 'double
precision' types as well 'single complex' and 'double complex' types.

gdb/ChangeLog:

	* f-exp.y (COMPLEX_KEYWORD, SINGLE, DOUBLE, PRECISION): New
	tokens.
	(typebase): New patterns for complex, single/double precision, and
	single/double complex.
	(f77_keywords): Change token for complex keyword, and add single,
	double, and precision keywords.

gdb/testsuite/ChangeLog:

	* gdb.fortran/type-kinds.exp (test_cast_1_to_type_kind): Handle
	casting to type with no kind specified.
	(test_basic_parsing_of_type_kinds): Additional tests for types
	with no kind specified, and add tests for single/double
	precision/complex types.

Change-Id: I9c82f4d392c58607747bd08862c1ee330723a1ba

4 files changed, 52 insertions, 3 deletions

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index ea89bfb..89b68b3 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,13 @@
+2019-12-04  Andrew Burgess  <andrew.burgess@embecosm.com>
+	    Chris January  <chris.january@arm.com>
+
+	* f-exp.y (COMPLEX_KEYWORD, SINGLE, DOUBLE, PRECISION): New
+	tokens.
+	(typebase): New patterns for complex, single/double precision, and
+	single/double complex.
+	(f77_keywords): Change token for complex keyword, and add single,
+	double, and precision keywords.
+
 2019-12-04  Simon Marchi  <simon.marchi@polymtl.ca>
 
 	* avr-tdep.c (_initialize_avr_tdep): Improve help of command
diff --git a/gdb/f-exp.y b/gdb/f-exp.y
index 9784ad5..a9c9583 100644
--- a/gdb/f-exp.y
+++ b/gdb/f-exp.y
@@ -167,8 +167,10 @@ static int parse_number (struct parser_state *, const char *, int,
 %token INT_KEYWORD INT_S2_KEYWORD LOGICAL_S1_KEYWORD LOGICAL_S2_KEYWORD 
 %token LOGICAL_S8_KEYWORD
 %token LOGICAL_KEYWORD REAL_KEYWORD REAL_S8_KEYWORD REAL_S16_KEYWORD 
+%token COMPLEX_KEYWORD
 %token COMPLEX_S8_KEYWORD COMPLEX_S16_KEYWORD COMPLEX_S32_KEYWORD 
 %token BOOL_AND BOOL_OR BOOL_NOT   
+%token SINGLE DOUBLE PRECISION
 %token <lval> CHARACTER 
 
 %token <voidval> DOLLAR_VARIABLE
@@ -617,12 +619,22 @@ typebase  /* Implements (approximately): (type-qualifier)* type-specifier */
 			{ $$ = parse_f_type (pstate)->builtin_real_s8; }
 	|	REAL_S16_KEYWORD
 			{ $$ = parse_f_type (pstate)->builtin_real_s16; }
+	|	COMPLEX_KEYWORD
+			{ $$ = parse_f_type (pstate)->builtin_complex_s8; }
 	|	COMPLEX_S8_KEYWORD
 			{ $$ = parse_f_type (pstate)->builtin_complex_s8; }
 	|	COMPLEX_S16_KEYWORD 
 			{ $$ = parse_f_type (pstate)->builtin_complex_s16; }
 	|	COMPLEX_S32_KEYWORD 
 			{ $$ = parse_f_type (pstate)->builtin_complex_s32; }
+	|	SINGLE PRECISION
+			{ $$ = parse_f_type (pstate)->builtin_real;}
+	|	DOUBLE PRECISION
+			{ $$ = parse_f_type (pstate)->builtin_real_s8;}
+	|	SINGLE COMPLEX_KEYWORD
+			{ $$ = parse_f_type (pstate)->builtin_complex_s8;}
+	|	DOUBLE COMPLEX_KEYWORD
+			{ $$ = parse_f_type (pstate)->builtin_complex_s16;}
 	;
 
 nonempty_typelist
@@ -956,10 +968,13 @@ static const struct token f77_keywords[] =
   { "integer", INT_KEYWORD, BINOP_END, true },
   { "logical", LOGICAL_KEYWORD, BINOP_END, true },
   { "real_16", REAL_S16_KEYWORD, BINOP_END, true },
-  { "complex", COMPLEX_S8_KEYWORD, BINOP_END, true },
+  { "complex", COMPLEX_KEYWORD, BINOP_END, true },
   { "sizeof", SIZEOF, BINOP_END, true },
   { "real_8", REAL_S8_KEYWORD, BINOP_END, true },
   { "real", REAL_KEYWORD, BINOP_END, true },
+  { "single", SINGLE, BINOP_END, true },
+  { "double", DOUBLE, BINOP_END, true },
+  { "precision", PRECISION, BINOP_END, true },
   /* The following correspond to actual functions in Fortran and are case
      insensitive.  */
   { "kind", KIND, BINOP_END, false },
diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index 2d45592..8df282c 100644
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,3 +1,11 @@
+2019-12-04  Andrew Burgess  <andrew.burgess@embecosm.com>
+
+	* gdb.fortran/type-kinds.exp (test_cast_1_to_type_kind): Handle
+	casting to type with no kind specified.
+	(test_basic_parsing_of_type_kinds): Additional tests for types
+	with no kind specified, and add tests for single/double
+	precision/complex types.
+
 2019-12-04  Tom Tromey  <tromey@adacore.com>
 
 	* gdb.base/endianity.c (struct other) <x>: New field.
diff --git a/gdb/testsuite/gdb.fortran/type-kinds.exp b/gdb/testsuite/gdb.fortran/type-kinds.exp
index 9d19a9c..725c3f0 100644
--- a/gdb/testsuite/gdb.fortran/type-kinds.exp
+++ b/gdb/testsuite/gdb.fortran/type-kinds.exp
@@ -23,9 +23,15 @@ if { [skip_fortran_tests] } { continue }
 
 # Cast the value 1 to the type 'BASE_TYPE (kind=TYPE_KIND)'.  The
 # expected result of the cast is CAST_RESULT, and the size of the
-# value returned by the cast should be SIZE_RESULT.
+# value returned by the cast should be SIZE_RESULT.  If TYPE_KIND is
+# the empty string then the cast is done to just 'BASE_TYPE'.
 proc test_cast_1_to_type_kind {base_type type_kind cast_result size_result} {
-    set type_string "$base_type (kind=$type_kind)"
+    if { $type_kind != "" } {
+	set kind_string " (kind=$type_kind)"
+    } else {
+	set kind_string ""
+    }
+    set type_string "${base_type}${kind_string}"
     gdb_test "p (($type_string) 1)" " = $cast_result"
     gdb_test "p sizeof (($type_string) 1)" " = $size_result"
 }
@@ -34,21 +40,31 @@ proc test_cast_1_to_type_kind {base_type type_kind cast_result size_result} {
 proc test_basic_parsing_of_type_kinds {} {
     test_cast_1_to_type_kind "character" "1" "1 '\\\\001'" "1"
 
+    test_cast_1_to_type_kind "complex" "" "\\(1,0\\)" "8"
     test_cast_1_to_type_kind "complex" "4" "\\(1,0\\)" "8"
     test_cast_1_to_type_kind "complex" "8" "\\(1,0\\)" "16"
     test_cast_1_to_type_kind "complex" "16" "\\(1,0\\)" "32"
 
+    test_cast_1_to_type_kind "real" "" "1" "4"
     test_cast_1_to_type_kind "real" "4" "1" "4"
     test_cast_1_to_type_kind "real" "8" "1" "8"
     test_cast_1_to_type_kind "real" "16" "1" "16"
 
+    test_cast_1_to_type_kind "logical" "" "\\.TRUE\\." "4"
     test_cast_1_to_type_kind "logical" "1" "\\.TRUE\\." "1"
     test_cast_1_to_type_kind "logical" "4" "\\.TRUE\\." "4"
     test_cast_1_to_type_kind "logical" "8" "\\.TRUE\\." "8"
 
+    test_cast_1_to_type_kind "integer" "" "1" "4"
     test_cast_1_to_type_kind "integer" "2" "1" "2"
     test_cast_1_to_type_kind "integer" "4" "1" "4"
     test_cast_1_to_type_kind "integer" "8" "1" "8"
+
+    test_cast_1_to_type_kind "double precision" "" "1" "8"
+    test_cast_1_to_type_kind "single precision" "" "1" "4"
+
+    test_cast_1_to_type_kind "double complex" "" "\\(1,0\\)" "16"
+    test_cast_1_to_type_kind "single complex" "" "\\(1,0\\)" "8"
 }
 
 proc test_parsing_invalid_type_kinds {} {