[rfa] Fix crashes on complex types

[Daniel Jacobowitz <drow@mvista.com>]

The complex type support has bitrotten a bit.  We used to set
TYPE_TARGET_TYPE properly in all the places we would create such types,
but a few more have crept in during the intervening years.  This patch
just makes sure that field is valid, so that we can use it to print
later.  This fixes PR gdb/422.

OK to commit?

-- 
Daniel Jacobowitz                           Carnegie Mellon University
MontaVista Software                         Debian GNU/Linux Developer

2002-03-17  Daniel Jacobowitz  <drow@mvista.com>

	Fix PR gdb/422.
	* c-lang.c (c_create_fundamental_type): Handle FT_COMPLEX,
	FT_DBL_PREC_COMPLEX, and FT_EXT_PREC_COMPLEX.
	* dwarf2read.c (read_base_type): Set TYPE_TARGET_TYPE for
	complex types.
	* stabsread.c (rs6000_builtin_type): Likewise.
	(read_sun_floating_type): Likewise.

Index: c-lang.c
===================================================================
RCS file: /cvs/src/src/gdb/c-lang.c,v
retrieving revision 1.10
diff -u -p -r1.10 c-lang.c
--- c-lang.c	2002/02/13 18:49:29	1.10
+++ c-lang.c	2002/03/17 18:17:24
@@ -338,6 +338,30 @@ c_create_fundamental_type (struct objfil
 			TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT,
 			0, "long double", objfile);
       break;
+    case FT_COMPLEX:
+      type = init_type (TYPE_CODE_FLT,
+			2 * TARGET_FLOAT_BIT / TARGET_CHAR_BIT,
+			0, "complex float", objfile);
+      TYPE_TARGET_TYPE (type)
+	= init_type (TYPE_CODE_FLT, TARGET_FLOAT_BIT / TARGET_CHAR_BIT,
+		     0, "float", objfile);
+      break;
+    case FT_DBL_PREC_COMPLEX:
+      type = init_type (TYPE_CODE_FLT,
+			2 * TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
+			0, "complex double", objfile);
+      TYPE_TARGET_TYPE (type)
+	= init_type (TYPE_CODE_FLT, TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
+		     0, "double", objfile);
+      break;
+    case FT_EXT_PREC_COMPLEX:
+      type = init_type (TYPE_CODE_FLT,
+			2 * TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT,
+			0, "complex long double", objfile);
+      TYPE_TARGET_TYPE (type)
+	= init_type (TYPE_CODE_FLT, TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT,
+		     0, "long double", objfile);
+      break;
     case FT_TEMPLATE_ARG:
       type = init_type (TYPE_CODE_TEMPLATE_ARG,
 			0,
Index: dwarf2read.c
===================================================================
RCS file: /cvs/src/src/gdb/dwarf2read.c,v
retrieving revision 1.50
diff -u -p -r1.50 dwarf2read.c
--- dwarf2read.c	2002/03/14 22:53:35	1.50
+++ dwarf2read.c	2002/03/17 18:17:25
@@ -2979,6 +2979,18 @@ read_base_type (struct die_info *die, st
       type = init_type (code, size, type_flags, DW_STRING (attr), objfile);
       if (encoding == DW_ATE_address)
 	TYPE_TARGET_TYPE (type) = dwarf2_fundamental_type (objfile, FT_VOID);
+      else if (encoding == DW_ATE_complex_float)
+	{
+	  if (size == 32)
+	    TYPE_TARGET_TYPE (type)
+	      = dwarf2_fundamental_type (objfile, FT_EXT_PREC_FLOAT);
+	  else if (size == 16)
+	    TYPE_TARGET_TYPE (type)
+	      = dwarf2_fundamental_type (objfile, FT_DBL_PREC_FLOAT);
+	  else if (size == 8)
+	    TYPE_TARGET_TYPE (type)
+	      = dwarf2_fundamental_type (objfile, FT_FLOAT);
+	}
     }
   else
     {
Index: stabsread.c
===================================================================
RCS file: /cvs/src/src/gdb/stabsread.c,v
retrieving revision 1.28
diff -u -p -r1.28 stabsread.c
--- stabsread.c	2002/03/08 17:19:39	1.28
+++ stabsread.c	2002/03/17 18:17:25
@@ -2978,10 +2978,14 @@ rs6000_builtin_type (int typenum)
     case 25:
       /* Complex type consisting of two IEEE single precision values.  */
       rettype = init_type (TYPE_CODE_COMPLEX, 8, 0, "complex", NULL);
+      TYPE_TARGET_TYPE (rettype) = init_type (TYPE_CODE_FLT, 4, 0, "float",
+					      NULL);
       break;
     case 26:
       /* Complex type consisting of two IEEE double precision values.  */
       rettype = init_type (TYPE_CODE_COMPLEX, 16, 0, "double complex", NULL);
+      TYPE_TARGET_TYPE (rettype) = init_type (TYPE_CODE_FLT, 8, 0, "double",
+					      NULL);
       break;
     case 27:
       rettype = init_type (TYPE_CODE_INT, 1, 0, "integer*1", NULL);
@@ -4511,6 +4515,7 @@ read_sun_floating_type (char **pp, int t
   int nbits;
   int details;
   int nbytes;
+  struct type *rettype;
 
   /* The first number has more details about the type, for example
      FN_COMPLEX.  */
@@ -4525,9 +4530,12 @@ read_sun_floating_type (char **pp, int t
 
   if (details == NF_COMPLEX || details == NF_COMPLEX16
       || details == NF_COMPLEX32)
-    /* This is a type we can't handle, but we do know the size.
-       We also will be able to give it a name.  */
-    return init_type (TYPE_CODE_COMPLEX, nbytes, 0, NULL, objfile);
+    {
+      rettype = init_type (TYPE_CODE_COMPLEX, nbytes, 0, NULL, objfile);
+      TYPE_TARGET_TYPE (rettype)
+	= init_type (TYPE_CODE_FLT, nbytes / 2, 0, NULL, objfile);
+      return rettype;
+    }
 
   return init_type (TYPE_CODE_FLT, nbytes, 0, NULL, objfile);
 }