* i386.c (override_options): Disable red zone by default on i386.

	(compute_frame_layout, ix86_force_to_memory, ix86_free_from_memory):
	Do not test TARGET_64BIT together with TARGET_RED_ZONE

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@65178 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index bfbcc94..7ee299b 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+Thu Apr  3 00:18:49 CEST 2003  Jan HUbicka  <jh@suse.cz>
+
+       * i386.c (override_options):  Disable red zone by default on i386.
+       (compute_frame_layout, ix86_force_to_memory, ix86_free_from_memory):  
+       Do not test TARGET_64BIT together with TARGET_RED_ZONE
+
 2003-04-02  Kazu Hirata  <kazu@cs.umass.edu>
 
        * config/h8300/h8300.md (a peephole2): Tighten the condition.

diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index 9c6653c..80a280f 100644 (file)
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -1380,7 +1380,13 @@ override_options ()
       ix86_fpmath = FPMATH_SSE;
      }
   else
-    ix86_fpmath = FPMATH_387;
+    {
+      ix86_fpmath = FPMATH_387;
+      /* i386 ABI does not specify red zone.  It still makes sense to use it
+         when programmer takes care to stack from being destroyed.  */
+      if (!(target_flags_explicit & MASK_NO_RED_ZONE))
+        target_flags |= MASK_NO_RED_ZONE;
+    }
 
   if (ix86_fpmath_string != 0)
     {
@@ -5026,7 +5032,7 @@ ix86_compute_frame_layout (frame)
   if (!frame->to_allocate && frame->nregs <= 1)
     frame->save_regs_using_mov = false;
 
-  if (TARGET_64BIT && TARGET_RED_ZONE && current_function_sp_is_unchanging
+  if (TARGET_RED_ZONE && current_function_sp_is_unchanging
       && current_function_is_leaf)
     {
       frame->red_zone_size = frame->to_allocate;
@@ -6074,11 +6080,13 @@ legitimate_address_p (mode, addr, strict)
             that never results in lea, this seems to be easier and
             correct fix for crash to disable this test.  */
        }
+#if 0
       else if (!CONSTANT_ADDRESS_P (disp))
        {
          reason = "displacement is not constant";
          goto report_error;
        }
+#endif
       else if (TARGET_64BIT && !x86_64_sign_extended_value (disp))
        {
          reason = "displacement is out of range";
@@ -14572,7 +14580,7 @@ ix86_force_to_memory (mode, operand)
   rtx result;
   if (!reload_completed)
     abort ();
-  if (TARGET_64BIT && TARGET_RED_ZONE)
+  if (TARGET_RED_ZONE)
     {
       result = gen_rtx_MEM (mode,
                            gen_rtx_PLUS (Pmode,
@@ -14580,7 +14588,7 @@ ix86_force_to_memory (mode, operand)
                                          GEN_INT (-RED_ZONE_SIZE)));
       emit_move_insn (result, operand);
     }
-  else if (TARGET_64BIT && !TARGET_RED_ZONE)
+  else if (!TARGET_RED_ZONE && TARGET_64BIT)
     {
       switch (mode)
        {
@@ -14649,7 +14657,7 @@ void
 ix86_free_from_memory (mode)
      enum machine_mode mode;
 {
-  if (!TARGET_64BIT || !TARGET_RED_ZONE)
+  if (!TARGET_RED_ZONE)
     {
       int size;