From: rguenth <rguenth@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Tue, 26 Jul 2016 14:07:05 +0000 (+0000)
Subject: 2016-07-26  Richard Biener  <rguenther@suse.de>
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=5514349581cbb6f924fc02aadda10de1ae8047f7;p=thirdparty%2Fgcc.git

2016-07-26  Richard Biener  <rguenther@suse.de>

	PR middle-end/72517
	* expmed.c (extract_bit_field_1): Constrain the vector mode
	with element size matching the extraction mode size when
	choosing a better vector mode to do the extraction from.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@238756 138bc75d-0d04-0410-961f-82ee72b054a4
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index bbc7e298d4a3..dff649d56798 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,10 @@
+2016-07-26  Richard Biener  <rguenther@suse.de>
+
+	PR middle-end/72517
+	* expmed.c (extract_bit_field_1): Constrain the vector mode
+	with element size matching the extraction mode size when
+	choosing a better vector mode to do the extraction from.
+
 2016-07-26  Richard Biener  <rguenther@suse.de>
 	    Prathamesh Kulkarni <prathamesh.kulkarni@linaro.org>
 
diff --git a/gcc/expmed.c b/gcc/expmed.c
index f776e54809e1..7af0c612200c 100644
--- a/gcc/expmed.c
+++ b/gcc/expmed.c
@@ -1581,6 +1581,7 @@ extract_bit_field_1 (rtx str_rtx, unsigned HOST_WIDE_INT bitsize,
 
       for (; new_mode != VOIDmode ; new_mode = GET_MODE_WIDER_MODE (new_mode))
 	if (GET_MODE_SIZE (new_mode) == GET_MODE_SIZE (GET_MODE (op0))
+	    && GET_MODE_UNIT_SIZE (new_mode) == GET_MODE_SIZE (tmode)
 	    && targetm.vector_mode_supported_p (new_mode))
 	  break;
       if (new_mode != VOIDmode)