From: Jakub Jelinek <jakub@redhat.com>
Date: Fri, 22 Jun 2018 20:58:44 +0000 (+0200)
Subject: backport: re PR inline-asm/85022 (internal compiler error: in write_dependence_p... 
X-Git-Tag: releases/gcc-7.4.0~350
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=49b60684bf7aa0db0df870445ac2439579bda353;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: r261939
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 6b8aba51fc24..95a00693a56c 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 0d25d4ec17ec..3d47559ec0f8 100644
--- a/gcc/emit-rtl.c
+++ b/gcc/emit-rtl.c
@@ -5851,7 +5851,7 @@ 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);