From: Jakub Jelinek <jakub@redhat.com>
Date: Mon, 25 Jun 2018 17:39:11 +0000 (+0200)
Subject: backport: re PR inline-asm/85022 (internal compiler error: in write_dependence_p... 
X-Git-Tag: releases/gcc-6.5.0~199
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d9e2eb23b4ae2ecad23f518c714ac877b07e511b;p=thirdparty%2Fgcc.git

backport: re PR inline-asm/85022 (internal compiler error: in write_dependence_p, at alias.c:3003)

	Backported from mainline
	2018-03-23  Jakub Jelinek  <jakub@redhat.com>

	PR inline-asm/85022
	* emit-rtl.c (init_emit_regs): Indicate that VOIDmode MEMs don't have
	known size by default.

From-SVN: r262085
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 56fe27d04a45..0227db7dafd8 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -3,6 +3,10 @@
 	Backported from mainline
 	2018-03-23  Jakub Jelinek  <jakub@redhat.com>
 
+	PR inline-asm/85022
+	* emit-rtl.c (init_emit_regs): Indicate that VOIDmode MEMs don't have
+	known size by default.
+
 	PR inline-asm/85034
 	* function.c (match_asm_constraints_1): Don't optimize if input
 	doesn't satisfy general_operand predicate for output's mode.
diff --git a/gcc/emit-rtl.c b/gcc/emit-rtl.c
index 0fcd9d95e5b4..527665be9720 100644
--- a/gcc/emit-rtl.c
+++ b/gcc/emit-rtl.c
@@ -5829,7 +5829,7 @@ init_emit_regs (void)
       attrs = ggc_cleared_alloc<mem_attrs> ();
       attrs->align = BITS_PER_UNIT;
       attrs->addrspace = ADDR_SPACE_GENERIC;
-      if (mode != BLKmode)
+      if (mode != BLKmode && mode != VOIDmode)
 	{
 	  attrs->size_known_p = true;
 	  attrs->size = GET_MODE_SIZE (mode);