Add ability to track uninitialized variables, and mark uninitialized

[pf3gnuchains/gcc-fork.git] / gcc / config / darwin.c

diff --git a/gcc/config/darwin.c b/gcc/config/darwin.c
index 1c7747c..0673915 100644 (file)
--- a/gcc/config/darwin.c
+++ b/gcc/config/darwin.c
@@ -1,6 +1,6 @@
 /* Functions for generic Darwin as target machine for GNU C compiler.
    Copyright (C) 1989, 1990, 1991, 1992, 1993, 2000, 2001, 2002, 2003, 2004,
-   2005
+   2005, 2006, 2007
    Free Software Foundation, Inc.
    Contributed by Apple Computer Inc.
 
@@ -45,6 +45,7 @@ Boston, MA 02110-1301, USA.  */
 #include "tm_p.h"
 #include "toplev.h"
 #include "hashtab.h"
+#include "df.h"
 
 /* Darwin supports a feature called fix-and-continue, which is used
    for rapid turn around debugging.  When code is compiled with the
@@ -515,7 +516,7 @@ machopic_indirect_data_reference (rtx orig, rtx reg)
        {
 #if defined (TARGET_TOC)
          /* Create a new register for CSE opportunities.  */
-         rtx hi_reg = (no_new_pseudos ? reg : gen_reg_rtx (Pmode));
+         rtx hi_reg = (!can_create_pseudo_p () ? reg : gen_reg_rtx (Pmode));
          emit_insn (gen_macho_high (hi_reg, orig));
          emit_insn (gen_macho_low (reg, hi_reg, orig));
 #else
@@ -532,7 +533,9 @@ machopic_indirect_data_reference (rtx orig, rtx reg)
 #endif
 
 #if defined (TARGET_TOC) /* i.e., PowerPC */
-         rtx hi_sum_reg = (no_new_pseudos ? reg : gen_reg_rtx (Pmode));
+         rtx hi_sum_reg = (!can_create_pseudo_p ()
+                           ? reg
+                           : gen_reg_rtx (Pmode));
 
          gcc_assert (reg);
 
@@ -704,7 +707,9 @@ machopic_legitimize_pic_address (rtx orig, enum machine_mode mode, rtx reg)
                  || GET_CODE (XEXP (orig, 0)) == LABEL_REF))
            {
 #if defined (TARGET_TOC)       /* ppc  */
-             rtx temp_reg = (no_new_pseudos) ? reg : gen_reg_rtx (Pmode);
+             rtx temp_reg = (!can_create_pseudo_p ()
+                             ? reg :
+                             gen_reg_rtx (Pmode));
              rtx asym = XEXP (orig, 0);
              rtx mem;
 
@@ -727,7 +732,9 @@ machopic_legitimize_pic_address (rtx orig, enum machine_mode mode, rtx reg)
 #if defined (TARGET_TOC) /* i.e., PowerPC */
              /* Generating a new reg may expose opportunities for
                 common subexpression elimination.  */
-              rtx hi_sum_reg = no_new_pseudos ? reg : gen_reg_rtx (Pmode);
+              rtx hi_sum_reg = (!can_create_pseudo_p ()
+                               ? reg
+                               : gen_reg_rtx (Pmode));
              rtx mem;
              rtx insn;
              rtx sum;
@@ -742,8 +749,7 @@ machopic_legitimize_pic_address (rtx orig, enum machine_mode mode, rtx reg)
                                  gen_rtx_LO_SUM (Pmode,
                                                  hi_sum_reg, offset));
              insn = emit_insn (gen_rtx_SET (VOIDmode, reg, mem));
-             REG_NOTES (insn) = gen_rtx_EXPR_LIST (REG_EQUAL, pic_ref,
-                                                   REG_NOTES (insn));
+             set_unique_reg_note (insn, REG_EQUAL, pic_ref);
 
              pic_ref = reg;
 #else
@@ -778,7 +784,7 @@ machopic_legitimize_pic_address (rtx orig, enum machine_mode mode, rtx reg)
 #endif
 
              if (reload_in_progress)
-               regs_ever_live[REGNO (pic)] = 1;
+               df_set_regs_ever_live (REGNO (pic), true);
              pic_ref = gen_rtx_PLUS (Pmode, pic,
                                      gen_pic_offset (XEXP (orig, 0),
                                                      pic_base));
@@ -849,7 +855,7 @@ machopic_legitimize_pic_address (rtx orig, enum machine_mode mode, rtx reg)
                                          pic_offset_table_rtx));
 #endif
                  if (reload_in_progress)
-                   regs_ever_live[REGNO (pic)] = 1;
+                   df_set_regs_ever_live (REGNO (pic), true);
                  pic_ref = gen_rtx_PLUS (Pmode,
                                          pic,
                                          gen_pic_offset (orig, pic_base));
@@ -1173,6 +1179,12 @@ darwin_mergeable_constant_section (tree exp,
   return readonly_data_section;
 }
 
+int
+machopic_reloc_rw_mask (void)
+{
+  return MACHOPIC_INDIRECT ? 3 : 0;
+}
+
 section *
 machopic_select_section (tree decl,
                         int reloc,
@@ -1183,10 +1195,9 @@ machopic_select_section (tree decl,
               && (lookup_attribute ("weak", DECL_ATTRIBUTES (decl))
                   || ! lookup_attribute ("weak_import",
                                          DECL_ATTRIBUTES (decl))));
-  int shlib = flag_pic;
   section *base_section;
 
-  switch (categorize_decl_for_section (decl, reloc, shlib))
+  switch (categorize_decl_for_section (decl, reloc))
     {
     case SECCAT_TEXT:
       base_section = darwin_text_section (reloc, weak);
@@ -1411,14 +1422,14 @@ darwin_handle_kext_attribute (tree *node, tree name,
   /* APPLE KEXT stuff -- only applies with pure static C++ code.  */
   if (! TARGET_KEXTABI)
     {
-      warning (0, "%<%s%> 2.95 vtable-compatability attribute applies "
+      warning (0, "%<%s%> 2.95 vtable-compatibility attribute applies "
               "only when compiling a kext", IDENTIFIER_POINTER (name));
 
       *no_add_attrs = true;
     }
   else if (TREE_CODE (*node) != RECORD_TYPE)
     {
-      warning (0, "%<%s%> 2.95 vtable-compatability attribute applies "
+      warning (0, "%<%s%> 2.95 vtable-compatibility attribute applies "
               "only to C++ classes", IDENTIFIER_POINTER (name));
 
       *no_add_attrs = true;
@@ -1704,11 +1715,6 @@ darwin_kextabi_p (void) {
 void
 darwin_override_options (void)
 {
-  if (flag_apple_kext && strcmp (lang_hooks.name, "GNU C++") != 0)
-    {
-      warning (0, "command line option %<-fapple-kext%> is only valid for C++");
-      flag_apple_kext = 0;
-    }
   if (flag_mkernel || flag_apple_kext)
     {
       /* -mkernel implies -fapple-kext for C++ */
@@ -1722,6 +1728,9 @@ darwin_override_options (void)
       /* No -fnon-call-exceptions data in kexts.  */
       flag_non_call_exceptions = 0;
     }
+  if (flag_var_tracking
+      && strverscmp (darwin_macosx_version_min, "10.5") >= 0)
+    flag_var_tracking_uninit = 1;
 }
 
 #include "gt-darwin.h"