From: Jakub Jelinek <jakub@redhat.com>
Date: Tue, 27 Mar 2018 20:00:56 +0000 (+0200)
Subject: re PR c++/85077 (V[248][SD]F abs not optimized to)
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=153dba6cbb3b37ad07d23d212890b2bd055ac05f;p=gcc.git

re PR c++/85077 (V[248][SD]F abs not optimized to)

	PR c++/85077
	* cp-gimplify.c (cp_fold) <case CONSTRUCTOR>: For ctors with vector
	type call fold to generate VECTOR_CSTs when possible.

	* g++.dg/ext/vector35.C: New test.

From-SVN: r258903
---

diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index b410f3d003e..1799d8a9b14 100644
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,5 +1,9 @@
 2018-03-27  Jakub Jelinek  <jakub@redhat.com>
 
+	PR c++/85077
+	* cp-gimplify.c (cp_fold) <case CONSTRUCTOR>: For ctors with vector
+	type call fold to generate VECTOR_CSTs when possible.
+
 	PR c++/85076
 	* tree.c (cp_build_reference_type): If to_type is error_mark_node,
 	return it right away.
diff --git a/gcc/cp/cp-gimplify.c b/gcc/cp/cp-gimplify.c
index 3edecf24c92..fd0c37f9be2 100644
--- a/gcc/cp/cp-gimplify.c
+++ b/gcc/cp/cp-gimplify.c
@@ -2504,6 +2504,8 @@ cp_fold (tree x)
 	    CONSTRUCTOR_PLACEHOLDER_BOUNDARY (x)
 	      = CONSTRUCTOR_PLACEHOLDER_BOUNDARY (org_x);
 	  }
+	if (VECTOR_TYPE_P (TREE_TYPE (x)))
+	  x = fold (x);
 	break;
       }
     case TREE_VEC:
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 93557dda655..ba8ba77c42c 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,5 +1,8 @@
 2018-03-27  Jakub Jelinek  <jakub@redhat.com>
 
+	PR c++/85077
+	* g++.dg/ext/vector35.C: New test.
+
 	PR c++/85061
 	* g++.dg/ext/builtin-offsetof3.C: New test.
 
diff --git a/gcc/testsuite/g++.dg/ext/vector35.C b/gcc/testsuite/g++.dg/ext/vector35.C
new file mode 100644
index 00000000000..22ff513091a
--- /dev/null
+++ b/gcc/testsuite/g++.dg/ext/vector35.C
@@ -0,0 +1,22 @@
+// PR c++/85077
+// { dg-do compile }
+// { dg-options "-Ofast -fdump-tree-forwprop1" }
+
+typedef float V __attribute__((vector_size (4 * sizeof (float))));
+typedef double W __attribute__((vector_size (2 * sizeof (double))));
+
+void
+foo (V *y)
+{
+  V x = *y;
+  *y = x < 0 ? -x : x;
+}
+
+void
+bar (W *y)
+{
+  W x = *y;
+  *y = x < 0 ? -x : x;
+}
+
+// { dg-final { scan-tree-dump-times "ABS_EXPR <" 2 "forwprop1" } }