From 1125164cd32576b05e6c078077d78736fa0d63e3 Mon Sep 17 00:00:00 2001
From: Jakub Jelinek <jakub@redhat.com>
Date: Sun, 21 Aug 2005 15:27:56 +0200
Subject: [PATCH] simplify-rtx.c (simplify_immed_subreg): Only clear up to
 elem_bitsize bits, not max_bitsize.

	* simplify-rtx.c (simplify_immed_subreg) <case CONST_DOUBLE>: Only clear
	up to elem_bitsize bits, not max_bitsize.

	* gcc.target/i386/sse-4.c: New test.

From-SVN: r103318
---
 gcc/ChangeLog                         |  5 +++++
 gcc/simplify-rtx.c                    |  2 +-
 gcc/testsuite/ChangeLog               |  4 ++++
 gcc/testsuite/gcc.target/i386/sse-4.c | 10 ++++++++++
 4 files changed, 20 insertions(+), 1 deletion(-)
 create mode 100644 gcc/testsuite/gcc.target/i386/sse-4.c

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 1329cf2f581..90e30ae6d7b 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2005-08-21  Jakub Jelinek  <jakub@redhat.com>
+
+	* simplify-rtx.c (simplify_immed_subreg) <case CONST_DOUBLE>: Only clear
+	up to elem_bitsize bits, not max_bitsize.
+
 2005-08-21  Sebastian Pop  <pop@cri.ensmp.fr>
 
 	PR tree-optimization/23433
diff --git a/gcc/simplify-rtx.c b/gcc/simplify-rtx.c
index ca9d9dab4a5..8a2faae30a6 100644
--- a/gcc/simplify-rtx.c
+++ b/gcc/simplify-rtx.c
@@ -3605,7 +3605,7 @@ simplify_immed_subreg (enum machine_mode outermode, rtx op,
 		}
 	      /* It shouldn't matter what's done here, so fill it with
 		 zero.  */
-	      for (; i < max_bitsize; i += value_bit)
+	      for (; i < elem_bitsize; i += value_bit)
 		*vp++ = 0;
 	    }
 	  else
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index f2489403855..310c782ba6f 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,7 @@
+2005-08-21  Jakub Jelinek  <jakub@redhat.com>
+
+	* gcc.target/i386/sse-4.c: New test.
+
 2005-08-20  John David Anglin  <dave.anglin@nrc-cnrc.gc.ca>
 
 	PR testsuite/23239
diff --git a/gcc/testsuite/gcc.target/i386/sse-4.c b/gcc/testsuite/gcc.target/i386/sse-4.c
new file mode 100644
index 00000000000..394ad9d7ec4
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/sse-4.c
@@ -0,0 +1,10 @@
+/* This testcase caused a buffer overflow in simplify_immed_subreg.  */
+/* { dg-do compile } */
+/* { dg-options "-O2 -msse2" } */
+
+#include <emmintrin.h>
+
+__m128i foo (__m128i x)
+{
+  return _mm_min_epu8 (x, _mm_set1_epi8 (10));
+}
-- 
2.30.2