From: hjl <hjl@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Mon, 19 Oct 2015 11:41:03 +0000 (+0000)
Subject: Use GET_MODE_BITSIZE to get vector natural alignment
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=b6ec4d7aba7569f3e7f786a61ed2bb5b33ab9058;p=thirdparty%2Fgcc.git

Use GET_MODE_BITSIZE to get vector natural alignment

Since GET_MODE_ALIGNMENT is defined by psABI and the biggest alignment
is 4 byte for IA MCU psABI, we should use GET_MODE_BITSIZE for IA MCU
psABI to get vector natural alignment to check misaligned vector move.

	* config/i386/i386.c (ix86_expand_vector_move): Use
	GET_MODE_BITSIZE for IA MCU psABI to get vector natural
	alignment.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@228969 138bc75d-0d04-0410-961f-82ee72b054a4
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index db0aea418e49..b04f38ba0ac6 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2015-10-19  H.J. Lu  <hongjiu.lu@intel.com>
+
+	* config/i386/i386.c (ix86_expand_vector_move): Use
+	GET_MODE_BITSIZE for IA MCU psABI to get vector natural
+	alignment.
+
 2015-10-19  H.J. Lu  <hongjiu.lu@intel.com>
 
 	* doc/invoke.texi: Replace @optindex with @opindex.
diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index 1049455aa2a2..a4f4b6fb8ab5 100644
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -18645,7 +18645,11 @@ void
 ix86_expand_vector_move (machine_mode mode, rtx operands[])
 {
   rtx op0 = operands[0], op1 = operands[1];
-  unsigned int align = GET_MODE_ALIGNMENT (mode);
+  /* Use GET_MODE_BITSIZE instead of GET_MODE_ALIGNMENT for IA MCU
+     psABI since the biggest alignment is 4 byte for IA MCU psABI.  */
+  unsigned int align = (TARGET_IAMCU
+			? GET_MODE_BITSIZE (mode)
+			: GET_MODE_ALIGNMENT (mode));
 
   if (push_operand (op0, VOIDmode))
     op0 = emit_move_resolve_push (mode, op0);