From: uros <uros@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Sat, 18 Jul 2015 09:50:37 +0000 (+0000)
Subject: 	PR target/66922
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=2e345fcd52217c23ffd843edf6e8ede75077ec55;p=thirdparty%2Fgcc.git

	PR target/66922
	* config/i386/i386.c (ix86_expand_pextr): Reject extractions
	from misaligned positions.
	(ix86_expand_pinsr): Reject insertions to misaligned positions.

testsuite/ChangeLog:

	PR target/66922
	* gcc.target/i386/pr66922.c: New test.



git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@225980 138bc75d-0d04-0410-961f-82ee72b054a4
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 98fb37bb2a8e..095713d9dffc 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,10 @@
+2015-07-18  Uros Bizjak  <ubizjak@gmail.com>
+
+	PR target/66922
+	* config/i386/i386.c (ix86_expand_pextr): Reject extractions
+	from misaligned positions.
+	(ix86_expand_pinsr): Reject insertions to misaligned positions.
+
 2015-07-18  Sebastian Pop  <s.pop@samsung.com>
 
 	PR middle-end/46851
diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index 01a1cb94a7c9..7901a4f17d7c 100644
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -50591,6 +50591,10 @@ ix86_expand_pextr (rtx *operands)
 	    return false;
 	  }
 
+	/* Reject extractions from misaligned positions.  */
+	if (pos & (size-1))
+	  return false;
+
 	if (GET_MODE (dst) == dstmode)
 	  d = dst;
 	else
@@ -50687,6 +50691,10 @@ ix86_expand_pinsr (rtx *operands)
 	    return false;
 	  }
 
+	/* Reject insertions to misaligned positions.  */
+	if (pos & (size-1))
+	  return false;
+
 	if (GET_CODE (src) == SUBREG)
 	  {
 	    unsigned int srcpos = SUBREG_BYTE (src);
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index a9b34ba71f16..214ad673d89a 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2015-07-18  Uros Bizjak  <ubizjak@gmail.com>
+
+	PR target/66922
+	* gcc.target/i386/pr66922.c: New test.
+
 2015-07-18  Sebastian Pop  <s.pop@samsung.com>
 
 	PR middle-end/46851
diff --git a/gcc/testsuite/gcc.target/i386/pr66922.c b/gcc/testsuite/gcc.target/i386/pr66922.c
new file mode 100644
index 000000000000..46274b22ce87
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr66922.c
@@ -0,0 +1,23 @@
+/* { dg-do run } */
+/* { dg-options "-O1 -msse2" } */
+/* { dg-require-effective-target sse2 } */
+
+#include "sse2-check.h"
+
+struct S 
+{
+  int:31;
+  int:2;
+  int f0:16;
+  int f1;
+  int f2;
+};
+
+static void 
+sse2_test (void)
+{
+  struct S a = { 1, 0, 0 };
+
+  if (a.f0 != 1)
+    __builtin_abort(); 
+}