From: Jakub Jelinek <jakub@redhat.com>
Date: Tue, 30 May 2017 07:36:13 +0000 (+0200)
Subject: backport: re PR rtl-optimization/77919 (ICE converting DC to V2DF mode)
X-Git-Tag: releases/gcc-5.5.0~293
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c1d9256ba093e101dd007607c8f8b8efbbb3b83a;p=thirdparty%2Fgcc.git

backport: re PR rtl-optimization/77919 (ICE converting DC to V2DF mode)

	Backported from mainline
	2016-10-28  Jakub Jelinek  <jakub@redhat.com>

	PR rtl-optimization/77919
	* expr.c (expand_expr_real_1) <normal_inner_ref>: Force CONCAT into
	MEM if mode1 is not a complex mode.

	* g++.dg/torture/pr77919.C: New test.

From-SVN: r248618
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 91ed67aba02c..2804651add67 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,6 +1,12 @@
 2017-05-30  Jakub Jelinek  <jakub@redhat.com>
 
 	Backported from mainline
+	2016-10-28  Jakub Jelinek  <jakub@redhat.com>
+
+	PR rtl-optimization/77919
+	* expr.c (expand_expr_real_1) <normal_inner_ref>: Force CONCAT into
+	MEM if mode1 is not a complex mode.
+
 	2016-10-05  Jakub Jelinek  <jakub@redhat.com>
 
 	PR sanitizer/66343
diff --git a/gcc/expr.c b/gcc/expr.c
index 0e301f8a7a9c..bfb7992290df 100644
--- a/gcc/expr.c
+++ b/gcc/expr.c
@@ -10197,7 +10197,8 @@ expand_expr_real_1 (tree exp, rtx target, machine_mode tmode,
 	if (GET_CODE (op0) == CONCAT && !must_force_mem)
 	  {
 	    if (bitpos == 0
-		&& bitsize == GET_MODE_BITSIZE (GET_MODE (op0)))
+		&& bitsize == GET_MODE_BITSIZE (GET_MODE (op0))
+		&& COMPLEX_MODE_P (mode1))
 	      return op0;
 	    if (bitpos == 0
 		&& bitsize == GET_MODE_BITSIZE (GET_MODE (XEXP (op0, 0)))
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 6bf50d262f59..d060cbb678a5 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,6 +1,11 @@
 2017-05-30  Jakub Jelinek  <jakub@redhat.com>
 
 	Backported from mainline
+	2016-10-28  Jakub Jelinek  <jakub@redhat.com>
+
+	PR rtl-optimization/77919
+	* g++.dg/torture/pr77919.C: New test.
+
 	2016-10-05  Jakub Jelinek  <jakub@redhat.com>
 
 	PR sanitizer/66343
diff --git a/gcc/testsuite/g++.dg/torture/pr77919.C b/gcc/testsuite/g++.dg/torture/pr77919.C
new file mode 100644
index 000000000000..cab6e909d36e
--- /dev/null
+++ b/gcc/testsuite/g++.dg/torture/pr77919.C
@@ -0,0 +1,11 @@
+// PR rtl-optimization/77919
+// { dg-do compile }
+// { dg-additional-options "-Wno-psabi" }
+
+struct A { A (double) {} _Complex double i; };
+typedef int __attribute__ ((vector_size (16))) B;
+typedef struct { B b; } C;
+struct D { D (const B &x) : b (x) {} B b; };
+static inline B foo (const double *x) { C *a; a = (C *) x; return a->b; }
+static inline D baz (const A &x) { return foo ((double *) &x); }
+D b = baz (0);