From ad4ecfda33b1120e3a632c9d29015496e5b923e2 Mon Sep 17 00:00:00 2001
From: jakub <jakub@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Tue, 21 Feb 2006 08:09:08 +0000
Subject: [PATCH] PR middle-end/26379 * combine.c
(simplify_shift_const_1): Disable nested shifts optimization for
vector shifts.
* gcc.target/i386/mmx-7.c: New test.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@111328 138bc75d-0d04-0410-961f-82ee72b054a4
---
gcc/ChangeLog | 6 ++++++
gcc/combine.c | 3 ++-
gcc/testsuite/ChangeLog | 5 +++++
gcc/testsuite/gcc.target/i386/mmx-7.c | 18 ++++++++++++++++++
4 files changed, 31 insertions(+), 1 deletion(-)
create mode 100644 gcc/testsuite/gcc.target/i386/mmx-7.c
diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 0349d92cb0ba..eee818bb408a 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2006-02-21 Jakub Jelinek <jakub@redhat.com>
+
+ PR middle-end/26379
+ * combine.c (simplify_shift_const_1): Disable nested shifts
+ optimization for vector shifts.
+
2006-02-20 Roger Sayle <roger@eyesopen.com>
PR tree-optimization/26361
diff --git a/gcc/combine.c b/gcc/combine.c
index 96ebd208a825..9240b32568af 100644
--- a/gcc/combine.c
+++ b/gcc/combine.c
@@ -8737,7 +8737,8 @@ simplify_shift_const_1 (enum rtx_code code, enum machine_mode result_mode,
&& INTVAL (XEXP (varop, 1)) >= 0
&& INTVAL (XEXP (varop, 1)) < GET_MODE_BITSIZE (GET_MODE (varop))
&& GET_MODE_BITSIZE (result_mode) <= HOST_BITS_PER_WIDE_INT
- && GET_MODE_BITSIZE (mode) <= HOST_BITS_PER_WIDE_INT)
+ && GET_MODE_BITSIZE (mode) <= HOST_BITS_PER_WIDE_INT
+ && !VECTOR_MODE_P (result_mode))
{
enum rtx_code first_code = GET_CODE (varop);
unsigned int first_count = INTVAL (XEXP (varop, 1));
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index cf2d999a3268..266489f94507 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2006-02-21 Jakub Jelinek <jakub@redhat.com>
+
+ PR middle-end/26379
+ * gcc.target/i386/mmx-7.c: New test.
+
2006-02-20 Roger Sayle <roger@eyesopen.com>
PR tree-optimization/26361
diff --git a/gcc/testsuite/gcc.target/i386/mmx-7.c b/gcc/testsuite/gcc.target/i386/mmx-7.c
new file mode 100644
index 000000000000..683ca102d8ae
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/mmx-7.c
@@ -0,0 +1,18 @@
+/* PR middle-end/26379 */
+/* { dg-do compile } */
+/* { dg-options "-O2 -mmmx" } */
+
+#include <mmintrin.h>
+
+void
+foo (__m64 *p)
+{
+ __m64 m;
+
+ m = p[0];
+ m = _mm_srli_pi16(m, 2);
+ m = _mm_slli_pi16(m, 8);
+
+ p[0] = m;
+ _mm_empty();
+}
--
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