From: Jim Wilson <wilson@cygnus.com>
Date: Wed, 5 Nov 1997 00:55:50 +0000 (+0000)
Subject: Fix shared library problem found by GNAT users.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=ab00eb0aa3dd2f42fd175d0792908f660b366e3b;p=gcc.git

Fix shared library problem found by GNAT users.

	* mips.c (mips_expand_epilogue): Emit blockage insn before call to
	save_restore_insns if no FP and GP will be restored.

From-SVN: r16327
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 2f981e9df74..7a3f4da7a73 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,4 +1,7 @@
-Tue Nov  4 12:30:28 1997  Jim Wilson  <wilson@cygnus.com>
+Tue Nov  4 16:55:11 1997  Jim Wilson  <wilson@cygnus.com>
+
+	* mips.c (mips_expand_epilogue): Emit blockage insn before call to
+	save_restore_insns if no FP and GP will be restored.
 
 	* dwarf2out.c (expand_builtin_dwarf_reg_size): New variable mode.
 	Convert CCmode to word_mode before calling GET_MODE_SIZE.
diff --git a/gcc/config/mips/mips.c b/gcc/config/mips/mips.c
index 85164356d88..2d6984b8737 100644
--- a/gcc/config/mips/mips.c
+++ b/gcc/config/mips/mips.c
@@ -5591,6 +5591,13 @@ mips_expand_epilogue ()
 	  else
 	    emit_insn (gen_movsi (stack_pointer_rtx, frame_pointer_rtx));
 	}
+      /* The GP/PIC register is implicitly used by all SYMBOL_REFs, so if we
+	 are going to restore it, then we must emit a blockage insn to
+	 prevent the scheduler from moving the restore out of the epilogue.  */
+      else if (TARGET_ABICALLS && mips_abi != ABI_32
+	       && (current_frame_info.mask
+		   & (1L << (PIC_OFFSET_TABLE_REGNUM - GP_REG_FIRST))))
+	emit_insn (gen_blockage ());
 
       save_restore_insns (FALSE, tmp_rtx, tsize, (FILE *)0);