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Bug: https://bugs.gentoo.org/664016
From 2a8e2ab2e9e11b679616d80285296ac77ad0920f Mon Sep 17 00:00:00 2001
From: hjl <hjl@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Mon, 20 Aug 2018 19:14:04 +0000
Subject: [PATCH] x86: Always update EH return address in word_mode
On x86, return address is always popped in word_mode. eh_return needs
to put EH return address in word_mode on stack.
gcc/
PR target/87014
* config/i386/i386.md (eh_return): Always update EH return
address in word_mode.
gcc/testsuite/
PR target/87014
* g++.dg/torture/pr87014.C: New file.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@263672 138bc75d-0d04-0410-961f-82ee72b054a4
--- a/gcc/config/i386/i386.md
+++ b/gcc/config/i386/i386.md
@@ -13612,7 +13612,10 @@
stack address we wish to restore. */
tmp = gen_rtx_PLUS (Pmode, arg_pointer_rtx, sa);
tmp = plus_constant (Pmode, tmp, -UNITS_PER_WORD);
- tmp = gen_rtx_MEM (Pmode, tmp);
+ /* Return address is always in word_mode. */
+ tmp = gen_rtx_MEM (word_mode, tmp);
+ if (GET_MODE (ra) != word_mode)
+ ra = convert_to_mode (word_mode, ra, 1);
emit_move_insn (tmp, ra);
emit_jump_insn (gen_eh_return_internal ());
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