gcc-5.3.0-save_require_frame-pointer_when_stack_misaligned.patch

gcc-5.3.0-save_require_frame-pointer_when_stack_misaligned.patch (text/plain), 789 bytes, created by Bob Wya on 2016-03-20 12:59:55 UTC

--- a/gcc/config/i386/i386.c	2016/01/18 16:18:49	232527
+++ b/gcc/config/i386/i386.c	2016/01/18 16:19:53	232528
@@ -9690,6 +9690,10 @@
   if (TARGET_64BIT_MS_ABI && get_frame_size () > SEH_MAX_FRAME_SIZE)
     return true;
 
+  /* SSE saves require frame-pointer when stack is misaligned.  */
+  if (TARGET_64BIT_MS_ABI && ix86_incoming_stack_boundary < 128)
+    return true;
+  
   /* In ix86_option_override_internal, TARGET_OMIT_LEAF_FRAME_POINTER
      turns off the frame pointer by default.  Turn it back on now if
      we've not got a leaf function.  */
@@ -13065,6 +13065,8 @@
       m->fs.fp_valid = true;
     }
 
+  m->fs.sp_valid = !frame_pointer_needed;
+
   if (!int_registers_saved)
     ix86_emit_save_regs_using_mov (frame.reg_save_offset);
   if (!sse_registers_saved)