From: Jakub Jelinek <jakub@redhat.com>
Date: Fri, 30 Aug 2019 12:28:22 +0000 (+0200)
Subject: backport: re PR target/89752 (ICE in emit_move_insn, at expr.c:3723)
X-Git-Tag: releases/gcc-7.5.0~225
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a3b2e69ae42c70e0c7f634406369095804e96016;p=thirdparty%2Fgcc.git

backport: re PR target/89752 (ICE in emit_move_insn, at expr.c:3723)

	Backported from mainline
	2019-03-20  Jakub Jelinek  <jakub@redhat.com>

	PR target/89752
	* lra-constraints.c (process_alt_operands) <reg>: For BLKmode, don't
	update this_alternative nor this_alternative_set.

From-SVN: r275138
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 9970d4e36721..36c445f3c7b3 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,6 +1,12 @@
 2019-08-30  Jakub Jelinek  <jakub@redhat.com>
 
 	Backported from mainline
+	2019-03-20  Jakub Jelinek  <jakub@redhat.com>
+
+	PR target/89752
+	* lra-constraints.c (process_alt_operands) <reg>: For BLKmode, don't
+	update this_alternative nor this_alternative_set.
+
 	2019-03-19  Jakub Jelinek  <jakub@redhat.com>
 
 	PR rtl-optimization/89768
diff --git a/gcc/lra-constraints.c b/gcc/lra-constraints.c
index 9b011fd70a5f..471f878d300e 100644
--- a/gcc/lra-constraints.c
+++ b/gcc/lra-constraints.c
@@ -2294,6 +2294,8 @@ process_alt_operands (int only_alternative)
 		  break;
 
 		reg:
+		  if (mode == BLKmode)
+		    break;
 		  this_alternative = reg_class_subunion[this_alternative][cl];
 		  IOR_HARD_REG_SET (this_alternative_set,
 				    reg_class_contents[cl]);
@@ -2304,8 +2306,6 @@ process_alt_operands (int only_alternative)
 		      IOR_HARD_REG_SET (this_costly_alternative_set,
 					reg_class_contents[cl]);
 		    }
-		  if (mode == BLKmode)
-		    break;
 		  winreg = true;
 		  if (REG_P (op))
 		    {