Another fix to the misaligned store vectorizer patch

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@153892 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index e4bfa40..30553dc 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2009-11-04  Revital Eres  <eres@il.ibm.com>
+
+       * tree-vect-data-refs.c (vect_enhance_data_refs_alignment):
+       Consider peeling for alignment only for stores and remove
+       redundant assignment.
+
 2009-11-04  Maxim Kuvyrkov  <maxim@codesourcery.com>
 
        PR target/41302

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 38a584a..5ef448c 100644 (file)
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,27 @@
+2009-11-04  Revital Eres  <eres@il.ibm.com>
+
+       * gcc.target/powerpc/vsx-vectorize-3.c: Adjust tetcase following
+       change in decision of peeling for alignment.
+       * gcc.target/powerpc/vsx-vectorize-5.c: Likewise.
+       * gcc.dg/vect/vect-50.c: Likewise.
+       * gcc.dg/vect/vect-42.c: Likewise.
+       * gcc.dg/vect/costmodel/i386/costmodel-fast-math-vect-pr29925.c:
+       Likewise.
+       * gcc.dg/vect/costmodel/x86_64/costmodel-fast-math-vect-pr29925.c:
+       Likewise.
+       * gcc.dg/vect/vect-multitypes-6.c: Likewise.
+       * gcc.dg/vect/vect-60.c: Likewise.
+       * gcc.dg/vect/vect-52.c: Likewise.
+       * gcc.dg/vect/vect-44.c: Likewise.
+       * gcc.dg/vect/vect-27.c: Likewise.
+       * gcc.dg/vect/vect-29.c: Likewise.
+       * gcc.dg/vect/vect-72.c: Likewise.
+       * gcc.dg/vect/vect-56.c: Likewise.
+       * gcc.dg/vect/vect-48.c: Likewise.
+       * gcc.dg/vect/vect-multitypes-3.c: Likewise.
+       * gfortran.dg/vect/vect-2.f90: Likewise.
+       * gfortran.dg/vect/vect-5.f90: Likewise.
+
 2009-11-04  Richard Guenther  <rguenther@suse.de>
 
        PR tree-optimization/41919

diff --git a/gcc/testsuite/gcc.dg/vect/costmodel/i386/costmodel-fast-math-vect-pr29925.c b/gcc/testsuite/gcc.dg/vect/costmodel/i386/costmodel-fast-math-vect-pr29925.c
index ffbd220..5627c26 100644 (file)
--- a/gcc/testsuite/gcc.dg/vect/costmodel/i386/costmodel-fast-math-vect-pr29925.c
+++ b/gcc/testsuite/gcc.dg/vect/costmodel/i386/costmodel-fast-math-vect-pr29925.c
@@ -35,6 +35,6 @@ int main()
    return 0;
 }
 
-/* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect"  { xfail vect_hw_misalign } } } */
+/* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" } } */
 /* { dg-final { cleanup-tree-dump "vect" } } */
 

diff --git a/gcc/testsuite/gcc.dg/vect/costmodel/x86_64/costmodel-fast-math-vect-pr29925.c b/gcc/testsuite/gcc.dg/vect/costmodel/x86_64/costmodel-fast-math-vect-pr29925.c
index a2ad28b..5627c26 100644 (file)
--- a/gcc/testsuite/gcc.dg/vect/costmodel/x86_64/costmodel-fast-math-vect-pr29925.c
+++ b/gcc/testsuite/gcc.dg/vect/costmodel/x86_64/costmodel-fast-math-vect-pr29925.c
@@ -35,6 +35,6 @@ int main()
    return 0;
 }
 
-/* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { xfail vect_hw_misalign } } } */
+/* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" } } */
 /* { dg-final { cleanup-tree-dump "vect" } } */
 

diff --git a/gcc/testsuite/gcc.dg/vect/vect-27.c b/gcc/testsuite/gcc.dg/vect/vect-27.c
index e117196..4a2da22 100644 (file)
--- a/gcc/testsuite/gcc.dg/vect/vect-27.c
+++ b/gcc/testsuite/gcc.dg/vect/vect-27.c
@@ -46,5 +46,5 @@ int main (void)
 /* { dg-final { scan-tree-dump-times "vectorized 2 loops" 1 "vect" { xfail vect_no_align } } } */
 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target vect_no_align } } } */
 /* { dg-final { scan-tree-dump-times "Vectorizing an unaligned access" 1 "vect" { xfail vect_no_align } } } */
-/* { dg-final { scan-tree-dump-times "Alignment of access forced using peeling" 1 "vect" { xfail {! vect_hw_misalign} } } } */
+/* { dg-final { scan-tree-dump-times "Alignment of access forced using peeling" 0 "vect" } } */
 /* { dg-final { cleanup-tree-dump "vect" } } */

diff --git a/gcc/testsuite/gcc.dg/vect/vect-29.c b/gcc/testsuite/gcc.dg/vect/vect-29.c
index 1645a2d..0ad2848 100644 (file)
--- a/gcc/testsuite/gcc.dg/vect/vect-29.c
+++ b/gcc/testsuite/gcc.dg/vect/vect-29.c
@@ -51,6 +51,6 @@ int main (void)
 /* The initialization induction loop (with aligned access) is also vectorized.  */
 /* { dg-final { scan-tree-dump-times "vectorized 2 loops" 1 "vect" } } */
 /* { dg-final { scan-tree-dump-times "Vectorizing an unaligned access" 1 "vect" { xfail vect_no_align } } } */
-/* { dg-final { scan-tree-dump-times "Alignment of access forced using peeling" 0 "vect" { xfail vect_hw_misalign } } } */
+/* { dg-final { scan-tree-dump-times "Alignment of access forced using peeling" 0 "vect" } } */
 /* { dg-final { scan-tree-dump-times "Alignment of access forced using versioning." 1 "vect" {target vect_no_align } } } */
 /* { dg-final { cleanup-tree-dump "vect" } } */

diff --git a/gcc/testsuite/gcc.dg/vect/vect-42.c b/gcc/testsuite/gcc.dg/vect/vect-42.c
index ebed418..3ba1c6f 100644 (file)
--- a/gcc/testsuite/gcc.dg/vect/vect-42.c
+++ b/gcc/testsuite/gcc.dg/vect/vect-42.c
@@ -65,6 +65,6 @@ int main (void)
 /* { dg-final { scan-tree-dump-times "vectorized 2 loops" 1 "vect" } } */
 /* { dg-final { scan-tree-dump-times "Alignment of access forced using versioning" 3 "vect" { target vect_no_align } } } */
 /* { dg-final { scan-tree-dump-times "Alignment of access forced using versioning" 1 "vect" { target { { ! vector_alignment_reachable } && { ! vect_hw_misalign } } } } } */
-/* { dg-final { scan-tree-dump-times "Vectorizing an unaligned access" 4 "vect" { xfail { { vect_no_align || vect_hw_misalign } || { ! vector_alignment_reachable } } } } } */
-/* { dg-final { scan-tree-dump-times "Alignment of access forced using peeling" 1 "vect" { xfail { { vect_no_align || vect_hw_misalign } || { ! vector_alignment_reachable } } } } } */
+/* { dg-final { scan-tree-dump-times "Vectorizing an unaligned access" 4 "vect" { xfail { vect_no_align || { ! vector_alignment_reachable } } } } } */
+/* { dg-final { scan-tree-dump-times "Alignment of access forced using peeling" 1 "vect" { xfail { vect_no_align || { ! vector_alignment_reachable } } } } } */
 /* { dg-final { cleanup-tree-dump "vect" } } */

diff --git a/gcc/testsuite/gcc.dg/vect/vect-44.c b/gcc/testsuite/gcc.dg/vect/vect-44.c
index 5f2228f..ef1a463 100644 (file)
--- a/gcc/testsuite/gcc.dg/vect/vect-44.c
+++ b/gcc/testsuite/gcc.dg/vect/vect-44.c
@@ -66,7 +66,7 @@ int main (void)
 
 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" } } */
 /* { dg-final { scan-tree-dump-times "Vectorizing an unaligned access" 2 "vect" { xfail { vect_no_align } } } } */
-/* { dg-final { scan-tree-dump-times "Alignment of access forced using peeling" 1 "vect" { xfail { { vect_no_align || {! vect_hw_misalign } } || {! vector_alignment_reachable} } } } } */
+/* { dg-final { scan-tree-dump-times "Alignment of access forced using peeling" 1 "vect" { xfail { vect_no_align || {! vector_alignment_reachable} } } } } */
 /* { dg-final { scan-tree-dump-times "Alignment of access forced using versioning." 3 "vect" { target vect_no_align } } } */
 /* { dg-final { scan-tree-dump-times "Alignment of access forced using versioning." 1 "vect" { target { {! vector_alignment_reachable} && {{! vect_no_align} && {! vect_hw_misalign} } } } } } */
 /* { dg-final { cleanup-tree-dump "vect" } } */

diff --git a/gcc/testsuite/gcc.dg/vect/vect-48.c b/gcc/testsuite/gcc.dg/vect/vect-48.c
index f66a862..e47ee00 100644 (file)
--- a/gcc/testsuite/gcc.dg/vect/vect-48.c
+++ b/gcc/testsuite/gcc.dg/vect/vect-48.c
@@ -55,6 +55,6 @@ int main (void)
 
 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect"  } } */
 /* { dg-final { scan-tree-dump-times "Vectorizing an unaligned access" 2 "vect" { xfail vect_no_align } } } */
-/* { dg-final { scan-tree-dump-times "Alignment of access forced using peeling" 1 "vect" { xfail {! vect_hw_misalign } } } } */
+/* { dg-final { scan-tree-dump-times "Alignment of access forced using peeling" 0 "vect" } } */
 /* { dg-final { scan-tree-dump-times "Alignment of access forced using versioning." 2 "vect" { target vect_no_align } } } */
 /* { dg-final { cleanup-tree-dump "vect" } } */

diff --git a/gcc/testsuite/gcc.dg/vect/vect-50.c b/gcc/testsuite/gcc.dg/vect/vect-50.c
index 74de0fb..068c804 100644 (file)
--- a/gcc/testsuite/gcc.dg/vect/vect-50.c
+++ b/gcc/testsuite/gcc.dg/vect/vect-50.c
@@ -63,7 +63,7 @@ int main (void)
 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" } } */
 /* { dg-final { scan-tree-dump-times "Vectorizing an unaligned access" 2 "vect" { xfail { vect_no_align } } } }  */
 /* { dg-final { scan-tree-dump-times "Vectorizing an unaligned access" 2 "vect" { target vect_hw_misalign } } } */
-/* { dg-final { scan-tree-dump-times "Alignment of access forced using peeling" 1 "vect" { xfail { { vect_no_align || {! vect_hw_misalign } } || {! vector_alignment_reachable} } } } } */
+/* { dg-final { scan-tree-dump-times "Alignment of access forced using peeling" 1 "vect" { xfail { vect_no_align || {! vector_alignment_reachable} } } } } */
 /* { dg-final { scan-tree-dump-times "Alignment of access forced using versioning." 3 "vect" { target vect_no_align } } } */
 /* { dg-final { scan-tree-dump-times "Alignment of access forced using versioning." 1 "vect" { target { {! vector_alignment_reachable} && { {! vect_no_align } && {! vect_hw_misalign } } } } } } */
 /* { dg-final { cleanup-tree-dump "vect" } } */

diff --git a/gcc/testsuite/gcc.dg/vect/vect-52.c b/gcc/testsuite/gcc.dg/vect/vect-52.c
index 426092e..af485ab 100644 (file)
--- a/gcc/testsuite/gcc.dg/vect/vect-52.c
+++ b/gcc/testsuite/gcc.dg/vect/vect-52.c
@@ -56,6 +56,6 @@ int main (void)
 
 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" } } */
 /* { dg-final { scan-tree-dump-times "Vectorizing an unaligned access" 2 "vect" { xfail vect_no_align } } } */
-/* { dg-final { scan-tree-dump-times "Alignment of access forced using peeling" 1 "vect" {xfail {! vect_hw_misalign } } } } */
+/* { dg-final { scan-tree-dump-times "Alignment of access forced using peeling" 0 "vect" } } */
 /* { dg-final { scan-tree-dump-times "Alignment of access forced using versioning." 2 "vect" { target vect_no_align } } } */
 /* { dg-final { cleanup-tree-dump "vect" } } */

diff --git a/gcc/testsuite/gcc.dg/vect/vect-56.c b/gcc/testsuite/gcc.dg/vect/vect-56.c
index 945d7ca..7b7da12 100644 (file)
--- a/gcc/testsuite/gcc.dg/vect/vect-56.c
+++ b/gcc/testsuite/gcc.dg/vect/vect-56.c
@@ -68,6 +68,6 @@ int main (void)
 }
 
 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { xfail vect_no_align } } } */
-/* { dg-final { scan-tree-dump-times "Vectorizing an unaligned access" 2 "vect" { xfail { vect_no_align || vect_hw_misalign } } } } */
-/* { dg-final { scan-tree-dump-times "Alignment of access forced using peeling" 1 "vect" { xfail {! vect_hw_misalign } } } } */
+/* { dg-final { scan-tree-dump-times "Vectorizing an unaligned access" 2 "vect" { xfail { vect_no_align } } } } */
+/* { dg-final { scan-tree-dump-times "Alignment of access forced using peeling" 0 "vect" } } */
 /* { dg-final { cleanup-tree-dump "vect" } } */

diff --git a/gcc/testsuite/gcc.dg/vect/vect-60.c b/gcc/testsuite/gcc.dg/vect/vect-60.c
index 90234dd..cbdf63d 100644 (file)
--- a/gcc/testsuite/gcc.dg/vect/vect-60.c
+++ b/gcc/testsuite/gcc.dg/vect/vect-60.c
@@ -69,6 +69,6 @@ int main (void)
 }
 
 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { xfail vect_no_align } } } */
-/* { dg-final { scan-tree-dump-times "Vectorizing an unaligned access" 2 "vect" { xfail { vect_no_align || vect_hw_misalign } } } } */
-/* { dg-final { scan-tree-dump-times "Alignment of access forced using peeling" 0 "vect" { xfail vect_hw_misalign } } } */
+/* { dg-final { scan-tree-dump-times "Vectorizing an unaligned access" 2 "vect" { xfail { vect_no_align } } } } */
+/* { dg-final { scan-tree-dump-times "Alignment of access forced using peeling" 0 "vect" } } */
 /* { dg-final { cleanup-tree-dump "vect" } } */

diff --git a/gcc/testsuite/gcc.dg/vect/vect-72.c b/gcc/testsuite/gcc.dg/vect/vect-72.c
index 1a9f13c..67a1975 100644 (file)
--- a/gcc/testsuite/gcc.dg/vect/vect-72.c
+++ b/gcc/testsuite/gcc.dg/vect/vect-72.c
@@ -47,5 +47,5 @@ int main (void)
 
 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { xfail vect_no_align } } } */
 /* { dg-final { scan-tree-dump-times "Vectorizing an unaligned access" 1 "vect" { xfail vect_no_align } } } */
-/* { dg-final { scan-tree-dump-times "Alignment of access forced using peeling" 0 "vect" { xfail vect_hw_misalign } } } */
+/* { dg-final { scan-tree-dump-times "Alignment of access forced using peeling" 0 "vect" } } */
 /* { dg-final { cleanup-tree-dump "vect" } } */

diff --git a/gcc/testsuite/gcc.dg/vect/vect-multitypes-3.c b/gcc/testsuite/gcc.dg/vect/vect-multitypes-3.c
index 2cbc621..3346e71 100644 (file)
--- a/gcc/testsuite/gcc.dg/vect/vect-multitypes-3.c
+++ b/gcc/testsuite/gcc.dg/vect/vect-multitypes-3.c
@@ -54,6 +54,6 @@ int main (void)
 
 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" } } */
 /*  { dg-final { scan-tree-dump-times "Alignment of access forced using versioning" 3 "vect" { target vect_no_align } } } */
-/* { dg-final { scan-tree-dump-times "Vectorizing an unaligned access" 3 "vect" {xfail { vect_no_align || vect_hw_misalign } } } } */
+/* { dg-final { scan-tree-dump-times "Vectorizing an unaligned access" 3 "vect" {xfail { vect_no_align } } } } */
 /* { dg-final { cleanup-tree-dump "vect" } } */
 

diff --git a/gcc/testsuite/gcc.dg/vect/vect-multitypes-6.c b/gcc/testsuite/gcc.dg/vect/vect-multitypes-6.c
index 522ed30..4508551 100644 (file)
--- a/gcc/testsuite/gcc.dg/vect/vect-multitypes-6.c
+++ b/gcc/testsuite/gcc.dg/vect/vect-multitypes-6.c
@@ -61,6 +61,6 @@ int main (void)
 
 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" } } */
 /*  { dg-final { scan-tree-dump-times "Alignment of access forced using versioning" 6 "vect" { target vect_no_align } } } */
-/* { dg-final { scan-tree-dump-times "Vectorizing an unaligned access" 6 "vect" {xfail { vect_no_align || vect_hw_misalign } } } } */
+/* { dg-final { scan-tree-dump-times "Vectorizing an unaligned access" 6 "vect" {xfail { vect_no_align } } } } */
 /* { dg-final { cleanup-tree-dump "vect" } } */
 

diff --git a/gcc/testsuite/gcc.target/powerpc/vsx-vectorize-3.c b/gcc/testsuite/gcc.target/powerpc/vsx-vectorize-3.c
index b7e1329..b99bcca 100644 (file)
--- a/gcc/testsuite/gcc.target/powerpc/vsx-vectorize-3.c
+++ b/gcc/testsuite/gcc.target/powerpc/vsx-vectorize-3.c
@@ -54,7 +54,7 @@ int main (void)
 }
 
 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" } } */
-/* { dg-final { scan-tree-dump-times "Alignment of access forced using peeling" 1 "vect" {xfail {! vect_hw_misalign } } } } */
-/* { dg-final { scan-tree-dump-times "Alignment of access forced using versioning" 0 "vect" {xfail {! vect_hw_misalign } } } } */
+/* { dg-final { scan-tree-dump-times "Alignment of access forced using peeling" 1 "vect" } } */
+/* { dg-final { scan-tree-dump-times "Alignment of access forced using versioning" 0 "vect" } } */
 /* { dg-final { scan-tree-dump-times "Vectorizing an unaligned access" 2 "vect" } } */
 /* { dg-final { cleanup-tree-dump "vect" } } */

diff --git a/gcc/testsuite/gcc.target/powerpc/vsx-vectorize-5.c b/gcc/testsuite/gcc.target/powerpc/vsx-vectorize-5.c
index a5449ff..32d05b2 100644 (file)
--- a/gcc/testsuite/gcc.target/powerpc/vsx-vectorize-5.c
+++ b/gcc/testsuite/gcc.target/powerpc/vsx-vectorize-5.c
@@ -54,7 +54,7 @@ int main (void)
 }
 
 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" } } */
-/* { dg-final { scan-tree-dump-times "Alignment of access forced using peeling" 1 "vect" {xfail {! vect_hw_misalign } } } } */
-/* { dg-final { scan-tree-dump-times "Alignment of access forced using versioning" 0 "vect" {xfail {! vect_hw_misalign } } } } */
+/* { dg-final { scan-tree-dump-times "Alignment of access forced using peeling" 1 "vect" } } */
+/* { dg-final { scan-tree-dump-times "Alignment of access forced using versioning" 0 "vect" } } */
 /* { dg-final { scan-tree-dump-times "Vectorizing an unaligned access" 2 "vect" } } */
 /* { dg-final { cleanup-tree-dump "vect" } } */

diff --git a/gcc/testsuite/gfortran.dg/vect/vect-2.f90 b/gcc/testsuite/gfortran.dg/vect/vect-2.f90
index bc904a0..0f45a70 100644 (file)
--- a/gcc/testsuite/gfortran.dg/vect/vect-2.f90
+++ b/gcc/testsuite/gfortran.dg/vect/vect-2.f90
@@ -15,7 +15,7 @@ END
 ! support unaligned loads).
 
 ! { dg-final { scan-tree-dump-times "vectorized 3 loops" 1 "vect" } }
-! { dg-final { scan-tree-dump-times "Alignment of access forced using peeling" 3 "vect" { xfail { { vect_no_align || { ! vect_hw_misalign } } || { ! vector_alignment_reachable } } } } }
+! { dg-final { scan-tree-dump-times "Alignment of access forced using peeling" 3 "vect" { xfail { vect_no_align || { ! vector_alignment_reachable } } } } }
 ! { dg-final { scan-tree-dump-times "Alignment of access forced using peeling" 2 "vect" { target { vect_no_align && { ! vector_alignment_reachable } } } } }
 ! { dg-final { scan-tree-dump-times "Vectorizing an unaligned access" 2 "vect" { xfail { vect_no_align } } } }
 ! { dg-final { scan-tree-dump-times "Alignment of access forced using versioning." 3 "vect" {target { vect_no_align || { { ! vector_alignment_reachable  } && { ! vect_hw_misalign } } } } } } 

diff --git a/gcc/testsuite/gfortran.dg/vect/vect-5.f90 b/gcc/testsuite/gfortran.dg/vect/vect-5.f90
index 25eb88e..72776a6 100644 (file)
--- a/gcc/testsuite/gfortran.dg/vect/vect-5.f90
+++ b/gcc/testsuite/gfortran.dg/vect/vect-5.f90
@@ -36,7 +36,7 @@
         end
 
 ! { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect"  } }
-! { dg-final { scan-tree-dump-times "Alignment of access forced using peeling" 1 "vect" { xfail { { vect_no_align || {! vect_hw_misalign } } || {! vector_alignment_reachable} } } } }
+! { dg-final { scan-tree-dump-times "Alignment of access forced using peeling" 1 "vect" { xfail { vect_no_align || {! vector_alignment_reachable} } } } }
 ! { dg-final { scan-tree-dump-times "Vectorizing an unaligned access" 1 "vect" { xfail { vect_no_align } } } }
 ! { dg-final { scan-tree-dump-times "Alignment of access forced using versioning." 2 "vect" { target { vect_no_align } } } }
 ! { dg-final { scan-tree-dump-times "Alignment of access forced using versioning." 1 "vect" { target { {! vector_alignment_reachable} && {! vect_hw_misalign} } } } }

diff --git a/gcc/tree-vect-data-refs.c b/gcc/tree-vect-data-refs.c
index b4c1f40..c13c275 100644 (file)
--- a/gcc/tree-vect-data-refs.c
+++ b/gcc/tree-vect-data-refs.c
@@ -1176,7 +1176,6 @@ vect_enhance_data_refs_alignment (loop_vec_info loop_vinfo)
     {
       stmt = DR_STMT (dr);
       stmt_info = vinfo_for_stmt (stmt);
-      supportable_dr_alignment = vect_supportable_dr_alignment (dr);
 
       /* For interleaving, only the alignment of the first access
          matters.  */
@@ -1184,7 +1183,7 @@ vect_enhance_data_refs_alignment (loop_vec_info loop_vinfo)
           && DR_GROUP_FIRST_DR (stmt_info) != stmt)
         continue;
 
-      if (!aligned_access_p (dr))
+      if (!DR_IS_READ (dr) && !aligned_access_p (dr))
         {
          do_peeling = vector_alignment_reachable_p (dr);
          if (do_peeling)