* config/ia64/sysv4.h (DO_SELECT_SECTION): Factored out of

	SELECT_SECTION.
	(UNIQUE_SECTION): Define to get small data correctly.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@53450 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 120 insertions, 31 deletions

diff --git a/gcc/config/ia64/sysv4.h b/gcc/config/ia64/sysv4.h
index c53a1dc05e9..f4550b682db 100644
--- a/gcc/config/ia64/sysv4.h
+++ b/gcc/config/ia64/sysv4.h
@@ -140,45 +140,134 @@ do {									\
   emit_safe_across_calls (STREAM);					\
 } while (0)
 
+/* A C statement or statements to switch to the appropriate
+   section for output of DECL.  DECL is either a `VAR_DECL' node
+   or a constant of some sort.  RELOC indicates whether forming
+   the initial value of DECL requires link-time relocations.
+
+   Set SECNUM to:
+	0	.text
+	1	.rodata
+	2	.data
+	3	.sdata
+	4	.bss
+	5	.sbss
+*/
+#define DO_SELECT_SECTION(SECNUM, DECL, RELOC)				\
+  do									\
+    {									\
+      if (TREE_CODE (DECL) == STRING_CST)				\
+	{								\
+	  if (! flag_writable_strings)					\
+	    SECNUM = 0x101;						\
+	  else								\
+	    SECNUM = 2;							\
+	}								\
+      else if (TREE_CODE (DECL) == VAR_DECL)				\
+	{								\
+	  if (XSTR (XEXP (DECL_RTL (DECL), 0), 0)[0]			\
+	      == SDATA_NAME_FLAG_CHAR)					\
+	    SECNUM = 3;							\
+	  /* ??? We need the extra RELOC check, because the default	\
+	     is to only check RELOC if flag_pic is set, and we don't	\
+	     set flag_pic (yet?).  */					\
+	  else if (!DECL_READONLY_SECTION (DECL, RELOC) || (RELOC))	\
+	    SECNUM = 2;							\
+	  else if (flag_merge_constants < 2)				\
+	    /* C and C++ don't allow different variables to share	\
+	       the same location.  -fmerge-all-constants allows		\
+	       even that (at the expense of not conforming).  */	\
+	    SECNUM = 1;							\
+	  else if (TREE_CODE (DECL_INITIAL (DECL)) == STRING_CST)	\
+	    SECNUM = 0x201;						\
+	  else								\
+	    SECNUM = 0x301;						\
+	}								\
+      /* This could be a CONSTRUCTOR containing ADDR_EXPR of a VAR_DECL, \
+	 in which case we can't put it in a shared library rodata.  */	\
+      else if (flag_pic && (RELOC))					\
+	SECNUM = 3;							\
+      else								\
+	SECNUM = 2;							\
+    }									\
+  while (0)
+
 /* We override svr4.h so that we can support the sdata section.  */
 
 #undef SELECT_SECTION
 #define SELECT_SECTION(DECL,RELOC,ALIGN)				\
-{									\
-  if (TREE_CODE (DECL) == STRING_CST)					\
+  do									\
     {									\
-      if (! flag_writable_strings)					\
-	mergeable_string_section ((DECL), (ALIGN), 0);			\
-      else								\
-	data_section ();						\
+      typedef void (*sec_fn) PARAMS ((void));				\
+      static sec_fn const sec_functions[6] =				\
+      {									\
+	text_section,							\
+	const_section,							\
+	data_section,							\
+	sdata_section,							\
+	bss_section,							\
+	sbss_section							\
+      };								\
+									\
+      int sec;								\
+									\
+      DO_SELECT_SECTION (sec, DECL, RELOC);				\
+									\
+      switch (sec)							\
+	{								\
+	case 0x101:							\
+	  mergeable_string_section (DECL, ALIGN, 0);			\
+	  break;							\
+	case 0x201:							\
+	  mergeable_string_section (DECL_INITIAL (DECL),		\
+				    ALIGN, 0);				\
+	  break;							\
+	case 0x301:							\
+	  mergeable_constant_section (DECL_MODE (DECL),			\
+				      ALIGN, 0);			\
+	  break;							\
+	default:							\
+	  (*sec_functions[sec]) ();					\
+	  break;							\
+	}								\
     }									\
-  else if (TREE_CODE (DECL) == VAR_DECL)				\
+  while (0)
+
+#undef  UNIQUE_SECTION
+#define UNIQUE_SECTION(DECL, RELOC)					\
+  do									\
     {									\
-      if (XSTR (XEXP (DECL_RTL (DECL), 0), 0)[0]			\
-	  == SDATA_NAME_FLAG_CHAR)					\
-        sdata_section ();						\
-      /* ??? We need the extra RELOC check, because the default is to	\
-	 only check RELOC if flag_pic is set, and we don't set flag_pic \
-	 (yet?).  */							\
-      else if (!DECL_READONLY_SECTION (DECL, RELOC) || (RELOC))		\
-	data_section ();						\
-      else if (flag_merge_constants < 2)				\
-	/* C and C++ don't allow different variables to share		\
-	   the same location.  -fmerge-all-constants allows		\
-	   even that (at the expense of not conforming).  */		\
-	const_section ();						\
-      else if (TREE_CODE (DECL_INITIAL (DECL)) == STRING_CST)		\
-	mergeable_string_section (DECL_INITIAL (DECL), (ALIGN), 0);	\
-      else								\
-	mergeable_constant_section (DECL_MODE (DECL), (ALIGN), 0);	\
+      static const char * const prefixes[6][2] =			\
+      {									\
+	{ ".text.",   ".gnu.linkonce.t." },				\
+	{ ".rodata.", ".gnu.linkonce.r." },				\
+	{ ".data.",   ".gnu.linkonce.d." },				\
+	{ ".sdata.",  ".gnu.linkonce.s." },				\
+	{ ".bss.",    ".gnu.linkonce.b." },				\
+	{ ".sbss.",   ".gnu.linkonce.sb." }				\
+      };								\
+									\
+      int nlen, plen, sec;						\
+      const char *name, *prefix;					\
+      char *string;							\
+									\
+      DO_SELECT_SECTION (sec, DECL, RELOC);				\
+									\
+      name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (DECL));		\
+      STRIP_NAME_ENCODING (name, name);					\
+      nlen = strlen (name);						\
+									\
+      prefix = prefixes[sec & 0xff][DECL_ONE_ONLY(DECL)];		\
+      plen = strlen (prefix);						\
+									\
+      string = alloca (nlen + plen + 1);				\
+									\
+      memcpy (string, prefix, plen);					\
+      memcpy (string + plen, name, nlen + 1);				\
+									\
+      DECL_SECTION_NAME (DECL) = build_string (nlen + plen, string);	\
     }									\
-  /* This could be a CONSTRUCTOR containing ADDR_EXPR of a VAR_DECL,	\
-     in which case we can't put it in a shared library rodata.  */	\
-  else if (flag_pic && (RELOC))						\
-    data_section ();							\
-  else									\
-    const_section ();							\
-}
+  while (0)
 
 /* Similarly for constant pool data.  */