From: Jakub Jelinek <jakub@redhat.com>
Date: Wed, 21 Mar 2018 10:13:29 +0000 (+0100)
Subject: re PR rtl-optimization/84989 (_mm512_broadcast_f32x4 triggers ICE in simplify_const_u... 
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=108b83c1fd97b06f1e99ffb5127f2c5b9623bb11;p=gcc.git

re PR rtl-optimization/84989 (_mm512_broadcast_f32x4 triggers ICE in simplify_const_unary_operation, at simplify-rtx.c:1731)

	PR rtl-optimization/84989
	* simplify-rtx.c (simplify_unary_operation_1): Don't try to simplify
	VEC_DUPLICATE with scalar result mode.

	* gcc.target/i386/pr84989.c: New test.

From-SVN: r258709
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 41f4b3b3422..1fd6490bdc5 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2018-03-21  Jakub Jelinek  <jakub@redhat.com>
+
+	PR rtl-optimization/84989
+	* simplify-rtx.c (simplify_unary_operation_1): Don't try to simplify
+	VEC_DUPLICATE with scalar result mode.
+
 2018-03-21  Martin Liska  <mliska@suse.cz>
 
 	PR ipa/84963
diff --git a/gcc/simplify-rtx.c b/gcc/simplify-rtx.c
index 2e7aa5c1295..23244a12545 100644
--- a/gcc/simplify-rtx.c
+++ b/gcc/simplify-rtx.c
@@ -1692,7 +1692,9 @@ simplify_unary_operation_1 (enum rtx_code code, machine_mode mode, rtx op)
       break;
     }
 
-  if (VECTOR_MODE_P (mode) && vec_duplicate_p (op, &elt))
+  if (VECTOR_MODE_P (mode)
+      && vec_duplicate_p (op, &elt)
+      && code != VEC_DUPLICATE)
     {
       /* Try applying the operator to ELT and see if that simplifies.
 	 We can duplicate the result if so.
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 7e844e5a82c..20e7dd9f2a0 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2018-03-21  Jakub Jelinek  <jakub@redhat.com>
+
+	PR rtl-optimization/84989
+	* gcc.target/i386/pr84989.c: New test.
+
 2018-03-21  Christophe Lyon  <christophe.lyon@linaro.org>
 
 	* gcc.target/arm/pr82518.c: Require arm_neon_hw.
diff --git a/gcc/testsuite/gcc.target/i386/pr84989.c b/gcc/testsuite/gcc.target/i386/pr84989.c
new file mode 100644
index 00000000000..10655d3f92d
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr84989.c
@@ -0,0 +1,12 @@
+/* PR rtl-optimization/84989 */
+/* { dg-do compile } */
+/* { dg-options "-O2 -mavx512f" } */
+
+#include <x86intrin.h>
+
+__m512
+foo (float a, float *b)
+{
+  return _mm512_sub_ps (_mm512_broadcast_f32x4 (_mm_load_ps (b)),
+			_mm512_broadcast_f32x4 (_mm_set1_ps (a)));
+}