(MASK_EMBEDDED_DATA, TARGET_EMBEDDED_DATA): New macros.

(TARGET_SWITCHED): Add new option -membedded-data.
(SELECT_RTX_SECTION, SELECT_SECTION): Call function in mips.c.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@7030 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/config/mips/mips.h b/gcc/config/mips/mips.h
index 175649b..76b28bd 100644 (file)
--- a/gcc/config/mips/mips.h
+++ b/gcc/config/mips/mips.h
@@ -255,11 +255,11 @@ extern char              *mktemp ();
 #define MASK_LONG_CALLS        0x00001000      /* Always call through a register */
 #define MASK_64BIT     0x00002000      /* Use 64 bit GP registers and insns */
 #define MASK_EMBEDDED_PIC 0x00004000   /* Generate embedded PIC code */
-#define MASK_UNUSED1   0x00008000
-#define MASK_UNUSED2   0x00010000
+#define MASK_EMBEDDED_DATA 0x00008000  /* Reduce RAM usage, not fast code */
+#define MASK_UNUSED4   0x00010000
 #define MASK_UNUSED3   0x00020000
-#define MASK_UNUSED4   0x00040000
-#define MASK_UNUSED5   0x00080000
+#define MASK_UNUSED2   0x00040000
+#define MASK_UNUSED1   0x00080000
 
                                        /* Dummy switches used only in spec's*/
 #define MASK_MIPS_TFILE        0x00000000      /* flag for mips-tfile usage */
@@ -331,6 +331,11 @@ extern char               *mktemp ();
                                           requires gas.  */
 #define TARGET_EMBEDDED_PIC    (target_flags & MASK_EMBEDDED_PIC)
 
+                                       /* for embedded systems, optimize for
+                                          reduced RAM space instead of for
+                                          fastest code.  */
+#define TARGET_EMBEDDED_DATA   (target_flags & MASK_EMBEDDED_DATA)
+
 /* Macro to define tables used to set the flags.
    This is a list in braces of pairs in braces,
    each pair being { "NAME", VALUE }
@@ -370,6 +375,8 @@ extern char        *mktemp ();
   {"no-long-calls",     -MASK_LONG_CALLS},                             \
   {"embedded-pic",       MASK_EMBEDDED_PIC},                           \
   {"no-embedded-pic",   -MASK_EMBEDDED_PIC},                           \
+  {"embedded-data",      MASK_EMBEDDED_DATA},                          \
+  {"no-embedded-data",  -MASK_EMBEDDED_DATA},                          \
   {"debug",              MASK_DEBUG},                                  \
   {"debuga",             MASK_DEBUG_A},                                \
   {"debugb",             MASK_DEBUG_B},                                \
@@ -3568,45 +3575,9 @@ rdata_section ()                                                 \
 /* Given a decl node or constant node, choose the section to output it in
    and select that section.  */
 
-#define SELECT_RTX_SECTION(MODE,RTX)                                   \
-{                                                                      \
-  if (GET_MODE_SIZE (MODE) <= mips_section_threshold                   \
-      && mips_section_threshold > 0)                                   \
-    sdata_section ();                                                  \
-  else                                                                 \
-    rdata_section ();                                                  \
-}                                                                      \
+#define SELECT_RTX_SECTION(MODE,RTX)   mips_select_rtx_section (MODE, RTX)
 
-#define SELECT_SECTION(DECL, RELOC)                                    \
-{                                                                      \
-  int size = int_size_in_bytes (TREE_TYPE (DECL));                     \
-                                                                       \
-  if (size > 0 && size <= mips_section_threshold)                      \
-    sdata_section ();                                                  \
-                                                                       \
-  else if (RELOC)                                                      \
-    data_section ();                                                   \
-                                                                       \
-  else if (TREE_CODE (DECL) == STRING_CST)                             \
-    {                                                                  \
-      if (flag_writable_strings)                                       \
-       data_section ();                                                \
-      else                                                             \
-       rdata_section ();                                               \
-    }                                                                  \
-                                                                       \
-  else if (TREE_CODE (DECL) != VAR_DECL)                               \
-    rdata_section ();                                                  \
-                                                                       \
-  else if (!TREE_READONLY (DECL) || TREE_SIDE_EFFECTS (DECL)           \
-          || !DECL_INITIAL (DECL)                                      \
-          || (DECL_INITIAL (DECL) != error_mark_node                   \
-              && !TREE_CONSTANT (DECL_INITIAL (DECL))))                \
-    data_section ();                                                   \
-                                                                       \
-  else                                                                 \
-    rdata_section ();                                                  \
-}
+#define SELECT_SECTION(DECL, RELOC)    mips_select_section (DECL, RELOC)
 
 \f
 /* Store in OUTPUT a string (made with alloca) containing