* [meta-arm] [PATCH] arm-toolchain: Fix potential runtime crash
@ 2021-02-12 15:22 Jon Mason
2021-02-13 20:38 ` Denys Dmytriyenko
2021-02-15 6:36 ` Sumit Garg
0 siblings, 2 replies; 5+ messages in thread
From: Jon Mason @ 2021-02-12 15:22 UTC (permalink / raw)
To: Sumit Garg, Denys Dmytriyenko; +Cc: meta-arm
Unless you have a problem with the patch below, I'm inclined to pull
it in ASAP. However, given that the Arm GCC 9.x has been EoL'ed in
favor of the 10.x code, should we just drop support for it?
Thanks,
Jon
----- Forwarded message from Jon Mason <jon.mason@arm.com> -----
Date: Thu, 11 Feb 2021 11:36:47 -0500
From: Jon Mason <jon.mason@arm.com>
To: meta-arm@lists.yoctoproject.org
Subject: [meta-arm] [PATCH] arm-toolchain: Fix potential runtime crash
GCCv9 tree vectorization code is faulty and can cause random crashes at
runtime (when using -O3). Add the backported patch to address this
issue.
Change-Id: If7bb0ba0720bab42e7d34f3679d988934f657392
Signed-off-by: Jon Mason <jon.mason@arm.com>
---
.../recipes-devtools/gcc/gcc-arm-9.2.inc | 1 +
...-PR-tree-optimization-97236-fix-bad-.patch | 119 ++++++++++++++++++
2 files changed, 120 insertions(+)
create mode 100644 meta-arm-toolchain/recipes-devtools/gcc/gcc-arm-9.2/0001-Backport-fix-for-PR-tree-optimization-97236-fix-bad-.patch
diff --git a/meta-arm-toolchain/recipes-devtools/gcc/gcc-arm-9.2.inc b/meta-arm-toolchain/recipes-devtools/gcc/gcc-arm-9.2.inc
index 08ad796..6378ecf 100644
--- a/meta-arm-toolchain/recipes-devtools/gcc/gcc-arm-9.2.inc
+++ b/meta-arm-toolchain/recipes-devtools/gcc/gcc-arm-9.2.inc
@@ -68,6 +68,7 @@ SRC_URI = "\
file://0035-Fix-for-testsuite-failure.patch \
file://0036-Re-introduce-spe-commandline-options.patch \
file://0037-Fix-up-libsanitizer-build-with-master-glibc.patch \
+ file://0001-Backport-fix-for-PR-tree-optimization-97236-fix-bad-.patch \
"
SRC_URI[md5sum] = "9c570fc4286825b4e6f67b3d34aade23"
diff --git a/meta-arm-toolchain/recipes-devtools/gcc/gcc-arm-9.2/0001-Backport-fix-for-PR-tree-optimization-97236-fix-bad-.patch b/meta-arm-toolchain/recipes-devtools/gcc/gcc-arm-9.2/0001-Backport-fix-for-PR-tree-optimization-97236-fix-bad-.patch
new file mode 100644
index 0000000..dc1039d
--- /dev/null
+++ b/meta-arm-toolchain/recipes-devtools/gcc/gcc-arm-9.2/0001-Backport-fix-for-PR-tree-optimization-97236-fix-bad-.patch
@@ -0,0 +1,119 @@
+Upstream-Status: Backport [https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=97b668f9a8c6ec565c278a60e7d1492a6932e409]
+Signed-off-by: Jon Mason <jon.mason@arm.com>
+
+From 97b668f9a8c6ec565c278a60e7d1492a6932e409 Mon Sep 17 00:00:00 2001
+From: Matthias Klose <doko@ubuntu.com>
+Date: Tue, 6 Oct 2020 13:41:37 +0200
+Subject: [PATCH] Backport fix for PR/tree-optimization/97236 - fix bad use of
+ VMAT_CONTIGUOUS
+
+This avoids using VMAT_CONTIGUOUS with single-element interleaving
+when using V1mode vectors. Instead keep VMAT_ELEMENTWISE but
+continue to avoid load-lanes and gathers.
+
+2020-10-01 Richard Biener <rguenther@suse.de>
+
+ PR tree-optimization/97236
+ * tree-vect-stmts.c (get_group_load_store_type): Keep
+ VMAT_ELEMENTWISE for single-element vectors.
+
+ * gcc.dg/vect/pr97236.c: New testcase.
+
+(cherry picked from commit 1ab88985631dd2c5a5e3b5c0dce47cf8b6ed2f82)
+---
+ gcc/testsuite/gcc.dg/vect/pr97236.c | 43 +++++++++++++++++++++++++++++
+ gcc/tree-vect-stmts.c | 20 ++++++--------
+ 2 files changed, 52 insertions(+), 11 deletions(-)
+ create mode 100644 gcc/testsuite/gcc.dg/vect/pr97236.c
+
+diff --git a/gcc/testsuite/gcc.dg/vect/pr97236.c b/gcc/testsuite/gcc.dg/vect/pr97236.c
+new file mode 100644
+index 000000000000..9d3dc20d953d
+--- /dev/null
++++ b/gcc/testsuite/gcc.dg/vect/pr97236.c
+@@ -0,0 +1,43 @@
++typedef unsigned char __uint8_t;
++typedef __uint8_t uint8_t;
++typedef struct plane_t {
++ uint8_t *p_pixels;
++ int i_lines;
++ int i_pitch;
++} plane_t;
++
++typedef struct {
++ plane_t p[5];
++} picture_t;
++
++#define N 4
++
++void __attribute__((noipa))
++picture_Clone(picture_t *picture, picture_t *res)
++{
++ for (int i = 0; i < N; i++) {
++ res->p[i].p_pixels = picture->p[i].p_pixels;
++ res->p[i].i_lines = picture->p[i].i_lines;
++ res->p[i].i_pitch = picture->p[i].i_pitch;
++ }
++}
++
++int
++main()
++{
++ picture_t aaa, bbb;
++ uint8_t pixels[10] = {1, 1, 1, 1, 1, 1, 1, 1};
++
++ for (unsigned i = 0; i < N; i++)
++ aaa.p[i].p_pixels = pixels;
++
++ picture_Clone (&aaa, &bbb);
++
++ uint8_t c = 0;
++ for (unsigned i = 0; i < N; i++)
++ c += bbb.p[i].p_pixels[0];
++
++ if (c != N)
++ __builtin_abort ();
++ return 0;
++}
+diff --git a/gcc/tree-vect-stmts.c b/gcc/tree-vect-stmts.c
+index 507f81b0a0e8..ffbba3441de2 100644
+--- a/gcc/tree-vect-stmts.c
++++ b/gcc/tree-vect-stmts.c
+@@ -2355,25 +2355,23 @@ get_group_load_store_type (stmt_vec_info stmt_info, tree vectype, bool slp,
+ /* First cope with the degenerate case of a single-element
+ vector. */
+ if (known_eq (TYPE_VECTOR_SUBPARTS (vectype), 1U))
+- *memory_access_type = VMAT_CONTIGUOUS;
++ ;
+
+ /* Otherwise try using LOAD/STORE_LANES. */
+- if (*memory_access_type == VMAT_ELEMENTWISE
+- && (vls_type == VLS_LOAD
+- ? vect_load_lanes_supported (vectype, group_size, masked_p)
+- : vect_store_lanes_supported (vectype, group_size,
+- masked_p)))
++ else if (vls_type == VLS_LOAD
++ ? vect_load_lanes_supported (vectype, group_size, masked_p)
++ : vect_store_lanes_supported (vectype, group_size,
++ masked_p))
+ {
+ *memory_access_type = VMAT_LOAD_STORE_LANES;
+ overrun_p = would_overrun_p;
+ }
+
+ /* If that fails, try using permuting loads. */
+- if (*memory_access_type == VMAT_ELEMENTWISE
+- && (vls_type == VLS_LOAD
+- ? vect_grouped_load_supported (vectype, single_element_p,
+- group_size)
+- : vect_grouped_store_supported (vectype, group_size)))
++ else if (vls_type == VLS_LOAD
++ ? vect_grouped_load_supported (vectype, single_element_p,
++ group_size)
++ : vect_grouped_store_supported (vectype, group_size))
+ {
+ *memory_access_type = VMAT_CONTIGUOUS_PERMUTE;
+ overrun_p = would_overrun_p;
+--
+2.20.1
+
--
2.17.1
----- End forwarded message -----
^ permalink raw reply related [flat|nested] 5+ messages in thread* Re: [meta-arm] [PATCH] arm-toolchain: Fix potential runtime crash
2021-02-12 15:22 [meta-arm] [PATCH] arm-toolchain: Fix potential runtime crash Jon Mason
@ 2021-02-13 20:38 ` Denys Dmytriyenko
2021-02-15 6:36 ` Sumit Garg
1 sibling, 0 replies; 5+ messages in thread
From: Denys Dmytriyenko @ 2021-02-13 20:38 UTC (permalink / raw)
To: Jon Mason; +Cc: Sumit Garg, meta-arm
Jon,
I'm fine with backporting a patch from upstream for gcc 9. It should probably
be merged to Dunfell as well. And master can drop gcc 9 recipes for building
from sources to match oe-core master, which only has gcc 10.
--
Denys
On Fri, Feb 12, 2021 at 10:22:16AM -0500, Jon Mason wrote:
> Unless you have a problem with the patch below, I'm inclined to pull
> it in ASAP. However, given that the Arm GCC 9.x has been EoL'ed in
> favor of the 10.x code, should we just drop support for it?
>
> Thanks,
> Jon
>
> ----- Forwarded message from Jon Mason <jon.mason@arm.com> -----
>
> Date: Thu, 11 Feb 2021 11:36:47 -0500
> From: Jon Mason <jon.mason@arm.com>
> To: meta-arm@lists.yoctoproject.org
> Subject: [meta-arm] [PATCH] arm-toolchain: Fix potential runtime crash
>
> GCCv9 tree vectorization code is faulty and can cause random crashes at
> runtime (when using -O3). Add the backported patch to address this
> issue.
>
> Change-Id: If7bb0ba0720bab42e7d34f3679d988934f657392
> Signed-off-by: Jon Mason <jon.mason@arm.com>
> ---
> .../recipes-devtools/gcc/gcc-arm-9.2.inc | 1 +
> ...-PR-tree-optimization-97236-fix-bad-.patch | 119 ++++++++++++++++++
> 2 files changed, 120 insertions(+)
> create mode 100644 meta-arm-toolchain/recipes-devtools/gcc/gcc-arm-9.2/0001-Backport-fix-for-PR-tree-optimization-97236-fix-bad-.patch
>
> diff --git a/meta-arm-toolchain/recipes-devtools/gcc/gcc-arm-9.2.inc b/meta-arm-toolchain/recipes-devtools/gcc/gcc-arm-9.2.inc
> index 08ad796..6378ecf 100644
> --- a/meta-arm-toolchain/recipes-devtools/gcc/gcc-arm-9.2.inc
> +++ b/meta-arm-toolchain/recipes-devtools/gcc/gcc-arm-9.2.inc
> @@ -68,6 +68,7 @@ SRC_URI = "\
> file://0035-Fix-for-testsuite-failure.patch \
> file://0036-Re-introduce-spe-commandline-options.patch \
> file://0037-Fix-up-libsanitizer-build-with-master-glibc.patch \
> + file://0001-Backport-fix-for-PR-tree-optimization-97236-fix-bad-.patch \
> "
> SRC_URI[md5sum] = "9c570fc4286825b4e6f67b3d34aade23"
>
> diff --git a/meta-arm-toolchain/recipes-devtools/gcc/gcc-arm-9.2/0001-Backport-fix-for-PR-tree-optimization-97236-fix-bad-.patch b/meta-arm-toolchain/recipes-devtools/gcc/gcc-arm-9.2/0001-Backport-fix-for-PR-tree-optimization-97236-fix-bad-.patch
> new file mode 100644
> index 0000000..dc1039d
> --- /dev/null
> +++ b/meta-arm-toolchain/recipes-devtools/gcc/gcc-arm-9.2/0001-Backport-fix-for-PR-tree-optimization-97236-fix-bad-.patch
> @@ -0,0 +1,119 @@
> +Upstream-Status: Backport [https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=97b668f9a8c6ec565c278a60e7d1492a6932e409]
> +Signed-off-by: Jon Mason <jon.mason@arm.com>
> +
> +From 97b668f9a8c6ec565c278a60e7d1492a6932e409 Mon Sep 17 00:00:00 2001
> +From: Matthias Klose <doko@ubuntu.com>
> +Date: Tue, 6 Oct 2020 13:41:37 +0200
> +Subject: [PATCH] Backport fix for PR/tree-optimization/97236 - fix bad use of
> + VMAT_CONTIGUOUS
> +
> +This avoids using VMAT_CONTIGUOUS with single-element interleaving
> +when using V1mode vectors. Instead keep VMAT_ELEMENTWISE but
> +continue to avoid load-lanes and gathers.
> +
> +2020-10-01 Richard Biener <rguenther@suse.de>
> +
> + PR tree-optimization/97236
> + * tree-vect-stmts.c (get_group_load_store_type): Keep
> + VMAT_ELEMENTWISE for single-element vectors.
> +
> + * gcc.dg/vect/pr97236.c: New testcase.
> +
> +(cherry picked from commit 1ab88985631dd2c5a5e3b5c0dce47cf8b6ed2f82)
> +---
> + gcc/testsuite/gcc.dg/vect/pr97236.c | 43 +++++++++++++++++++++++++++++
> + gcc/tree-vect-stmts.c | 20 ++++++--------
> + 2 files changed, 52 insertions(+), 11 deletions(-)
> + create mode 100644 gcc/testsuite/gcc.dg/vect/pr97236.c
> +
> +diff --git a/gcc/testsuite/gcc.dg/vect/pr97236.c b/gcc/testsuite/gcc.dg/vect/pr97236.c
> +new file mode 100644
> +index 000000000000..9d3dc20d953d
> +--- /dev/null
> ++++ b/gcc/testsuite/gcc.dg/vect/pr97236.c
> +@@ -0,0 +1,43 @@
> ++typedef unsigned char __uint8_t;
> ++typedef __uint8_t uint8_t;
> ++typedef struct plane_t {
> ++ uint8_t *p_pixels;
> ++ int i_lines;
> ++ int i_pitch;
> ++} plane_t;
> ++
> ++typedef struct {
> ++ plane_t p[5];
> ++} picture_t;
> ++
> ++#define N 4
> ++
> ++void __attribute__((noipa))
> ++picture_Clone(picture_t *picture, picture_t *res)
> ++{
> ++ for (int i = 0; i < N; i++) {
> ++ res->p[i].p_pixels = picture->p[i].p_pixels;
> ++ res->p[i].i_lines = picture->p[i].i_lines;
> ++ res->p[i].i_pitch = picture->p[i].i_pitch;
> ++ }
> ++}
> ++
> ++int
> ++main()
> ++{
> ++ picture_t aaa, bbb;
> ++ uint8_t pixels[10] = {1, 1, 1, 1, 1, 1, 1, 1};
> ++
> ++ for (unsigned i = 0; i < N; i++)
> ++ aaa.p[i].p_pixels = pixels;
> ++
> ++ picture_Clone (&aaa, &bbb);
> ++
> ++ uint8_t c = 0;
> ++ for (unsigned i = 0; i < N; i++)
> ++ c += bbb.p[i].p_pixels[0];
> ++
> ++ if (c != N)
> ++ __builtin_abort ();
> ++ return 0;
> ++}
> +diff --git a/gcc/tree-vect-stmts.c b/gcc/tree-vect-stmts.c
> +index 507f81b0a0e8..ffbba3441de2 100644
> +--- a/gcc/tree-vect-stmts.c
> ++++ b/gcc/tree-vect-stmts.c
> +@@ -2355,25 +2355,23 @@ get_group_load_store_type (stmt_vec_info stmt_info, tree vectype, bool slp,
> + /* First cope with the degenerate case of a single-element
> + vector. */
> + if (known_eq (TYPE_VECTOR_SUBPARTS (vectype), 1U))
> +- *memory_access_type = VMAT_CONTIGUOUS;
> ++ ;
> +
> + /* Otherwise try using LOAD/STORE_LANES. */
> +- if (*memory_access_type == VMAT_ELEMENTWISE
> +- && (vls_type == VLS_LOAD
> +- ? vect_load_lanes_supported (vectype, group_size, masked_p)
> +- : vect_store_lanes_supported (vectype, group_size,
> +- masked_p)))
> ++ else if (vls_type == VLS_LOAD
> ++ ? vect_load_lanes_supported (vectype, group_size, masked_p)
> ++ : vect_store_lanes_supported (vectype, group_size,
> ++ masked_p))
> + {
> + *memory_access_type = VMAT_LOAD_STORE_LANES;
> + overrun_p = would_overrun_p;
> + }
> +
> + /* If that fails, try using permuting loads. */
> +- if (*memory_access_type == VMAT_ELEMENTWISE
> +- && (vls_type == VLS_LOAD
> +- ? vect_grouped_load_supported (vectype, single_element_p,
> +- group_size)
> +- : vect_grouped_store_supported (vectype, group_size)))
> ++ else if (vls_type == VLS_LOAD
> ++ ? vect_grouped_load_supported (vectype, single_element_p,
> ++ group_size)
> ++ : vect_grouped_store_supported (vectype, group_size))
> + {
> + *memory_access_type = VMAT_CONTIGUOUS_PERMUTE;
> + overrun_p = would_overrun_p;
> +--
> +2.20.1
> +
> --
> 2.17.1
>
>
>
>
>
>
>
> ----- End forwarded message -----
>
>
>
--
Regards,
Denys Dmytriyenko <denis@denix.org>
PGP: 0x420902729A92C964 - https://denix.org/0x420902729A92C964
Fingerprint: 25FC E4A5 8A72 2F69 1186 6D76 4209 0272 9A92 C964
^ permalink raw reply [flat|nested] 5+ messages in thread* Re: [meta-arm] [PATCH] arm-toolchain: Fix potential runtime crash
2021-02-12 15:22 [meta-arm] [PATCH] arm-toolchain: Fix potential runtime crash Jon Mason
2021-02-13 20:38 ` Denys Dmytriyenko
@ 2021-02-15 6:36 ` Sumit Garg
2021-02-16 18:45 ` Jon Mason
1 sibling, 1 reply; 5+ messages in thread
From: Sumit Garg @ 2021-02-15 6:36 UTC (permalink / raw)
To: Jon Mason; +Cc: Denys Dmytriyenko, meta-arm
Hi Jon,
On Fri, 12 Feb 2021 at 20:52, Jon Mason <jdmason@kudzu.us> wrote:
>
> Unless you have a problem with the patch below, I'm inclined to pull
> it in ASAP.
Sure, please go ahead to pull it in for dunfell.
> However, given that the Arm GCC 9.x has been EoL'ed in
> favor of the 10.x code, should we just drop support for it?
>
Yes, I agree we should drop support for Arm GCC 9.x from master
branch. I kept it there earlier during Arm GCC 10.x addition just for
the ease of migration.
Let me share a patch for this.
-Sumit
> Thanks,
> Jon
>
> ----- Forwarded message from Jon Mason <jon.mason@arm.com> -----
>
> Date: Thu, 11 Feb 2021 11:36:47 -0500
> From: Jon Mason <jon.mason@arm.com>
> To: meta-arm@lists.yoctoproject.org
> Subject: [meta-arm] [PATCH] arm-toolchain: Fix potential runtime crash
>
> GCCv9 tree vectorization code is faulty and can cause random crashes at
> runtime (when using -O3). Add the backported patch to address this
> issue.
>
> Change-Id: If7bb0ba0720bab42e7d34f3679d988934f657392
> Signed-off-by: Jon Mason <jon.mason@arm.com>
> ---
> .../recipes-devtools/gcc/gcc-arm-9.2.inc | 1 +
> ...-PR-tree-optimization-97236-fix-bad-.patch | 119 ++++++++++++++++++
> 2 files changed, 120 insertions(+)
> create mode 100644 meta-arm-toolchain/recipes-devtools/gcc/gcc-arm-9.2/0001-Backport-fix-for-PR-tree-optimization-97236-fix-bad-.patch
>
> diff --git a/meta-arm-toolchain/recipes-devtools/gcc/gcc-arm-9.2.inc b/meta-arm-toolchain/recipes-devtools/gcc/gcc-arm-9.2.inc
> index 08ad796..6378ecf 100644
> --- a/meta-arm-toolchain/recipes-devtools/gcc/gcc-arm-9.2.inc
> +++ b/meta-arm-toolchain/recipes-devtools/gcc/gcc-arm-9.2.inc
> @@ -68,6 +68,7 @@ SRC_URI = "\
> file://0035-Fix-for-testsuite-failure.patch \
> file://0036-Re-introduce-spe-commandline-options.patch \
> file://0037-Fix-up-libsanitizer-build-with-master-glibc.patch \
> + file://0001-Backport-fix-for-PR-tree-optimization-97236-fix-bad-.patch \
> "
> SRC_URI[md5sum] = "9c570fc4286825b4e6f67b3d34aade23"
>
> diff --git a/meta-arm-toolchain/recipes-devtools/gcc/gcc-arm-9.2/0001-Backport-fix-for-PR-tree-optimization-97236-fix-bad-.patch b/meta-arm-toolchain/recipes-devtools/gcc/gcc-arm-9.2/0001-Backport-fix-for-PR-tree-optimization-97236-fix-bad-.patch
> new file mode 100644
> index 0000000..dc1039d
> --- /dev/null
> +++ b/meta-arm-toolchain/recipes-devtools/gcc/gcc-arm-9.2/0001-Backport-fix-for-PR-tree-optimization-97236-fix-bad-.patch
> @@ -0,0 +1,119 @@
> +Upstream-Status: Backport [https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=97b668f9a8c6ec565c278a60e7d1492a6932e409]
> +Signed-off-by: Jon Mason <jon.mason@arm.com>
> +
> +From 97b668f9a8c6ec565c278a60e7d1492a6932e409 Mon Sep 17 00:00:00 2001
> +From: Matthias Klose <doko@ubuntu.com>
> +Date: Tue, 6 Oct 2020 13:41:37 +0200
> +Subject: [PATCH] Backport fix for PR/tree-optimization/97236 - fix bad use of
> + VMAT_CONTIGUOUS
> +
> +This avoids using VMAT_CONTIGUOUS with single-element interleaving
> +when using V1mode vectors. Instead keep VMAT_ELEMENTWISE but
> +continue to avoid load-lanes and gathers.
> +
> +2020-10-01 Richard Biener <rguenther@suse.de>
> +
> + PR tree-optimization/97236
> + * tree-vect-stmts.c (get_group_load_store_type): Keep
> + VMAT_ELEMENTWISE for single-element vectors.
> +
> + * gcc.dg/vect/pr97236.c: New testcase.
> +
> +(cherry picked from commit 1ab88985631dd2c5a5e3b5c0dce47cf8b6ed2f82)
> +---
> + gcc/testsuite/gcc.dg/vect/pr97236.c | 43 +++++++++++++++++++++++++++++
> + gcc/tree-vect-stmts.c | 20 ++++++--------
> + 2 files changed, 52 insertions(+), 11 deletions(-)
> + create mode 100644 gcc/testsuite/gcc.dg/vect/pr97236.c
> +
> +diff --git a/gcc/testsuite/gcc.dg/vect/pr97236.c b/gcc/testsuite/gcc.dg/vect/pr97236.c
> +new file mode 100644
> +index 000000000000..9d3dc20d953d
> +--- /dev/null
> ++++ b/gcc/testsuite/gcc.dg/vect/pr97236.c
> +@@ -0,0 +1,43 @@
> ++typedef unsigned char __uint8_t;
> ++typedef __uint8_t uint8_t;
> ++typedef struct plane_t {
> ++ uint8_t *p_pixels;
> ++ int i_lines;
> ++ int i_pitch;
> ++} plane_t;
> ++
> ++typedef struct {
> ++ plane_t p[5];
> ++} picture_t;
> ++
> ++#define N 4
> ++
> ++void __attribute__((noipa))
> ++picture_Clone(picture_t *picture, picture_t *res)
> ++{
> ++ for (int i = 0; i < N; i++) {
> ++ res->p[i].p_pixels = picture->p[i].p_pixels;
> ++ res->p[i].i_lines = picture->p[i].i_lines;
> ++ res->p[i].i_pitch = picture->p[i].i_pitch;
> ++ }
> ++}
> ++
> ++int
> ++main()
> ++{
> ++ picture_t aaa, bbb;
> ++ uint8_t pixels[10] = {1, 1, 1, 1, 1, 1, 1, 1};
> ++
> ++ for (unsigned i = 0; i < N; i++)
> ++ aaa.p[i].p_pixels = pixels;
> ++
> ++ picture_Clone (&aaa, &bbb);
> ++
> ++ uint8_t c = 0;
> ++ for (unsigned i = 0; i < N; i++)
> ++ c += bbb.p[i].p_pixels[0];
> ++
> ++ if (c != N)
> ++ __builtin_abort ();
> ++ return 0;
> ++}
> +diff --git a/gcc/tree-vect-stmts.c b/gcc/tree-vect-stmts.c
> +index 507f81b0a0e8..ffbba3441de2 100644
> +--- a/gcc/tree-vect-stmts.c
> ++++ b/gcc/tree-vect-stmts.c
> +@@ -2355,25 +2355,23 @@ get_group_load_store_type (stmt_vec_info stmt_info, tree vectype, bool slp,
> + /* First cope with the degenerate case of a single-element
> + vector. */
> + if (known_eq (TYPE_VECTOR_SUBPARTS (vectype), 1U))
> +- *memory_access_type = VMAT_CONTIGUOUS;
> ++ ;
> +
> + /* Otherwise try using LOAD/STORE_LANES. */
> +- if (*memory_access_type == VMAT_ELEMENTWISE
> +- && (vls_type == VLS_LOAD
> +- ? vect_load_lanes_supported (vectype, group_size, masked_p)
> +- : vect_store_lanes_supported (vectype, group_size,
> +- masked_p)))
> ++ else if (vls_type == VLS_LOAD
> ++ ? vect_load_lanes_supported (vectype, group_size, masked_p)
> ++ : vect_store_lanes_supported (vectype, group_size,
> ++ masked_p))
> + {
> + *memory_access_type = VMAT_LOAD_STORE_LANES;
> + overrun_p = would_overrun_p;
> + }
> +
> + /* If that fails, try using permuting loads. */
> +- if (*memory_access_type == VMAT_ELEMENTWISE
> +- && (vls_type == VLS_LOAD
> +- ? vect_grouped_load_supported (vectype, single_element_p,
> +- group_size)
> +- : vect_grouped_store_supported (vectype, group_size)))
> ++ else if (vls_type == VLS_LOAD
> ++ ? vect_grouped_load_supported (vectype, single_element_p,
> ++ group_size)
> ++ : vect_grouped_store_supported (vectype, group_size))
> + {
> + *memory_access_type = VMAT_CONTIGUOUS_PERMUTE;
> + overrun_p = would_overrun_p;
> +--
> +2.20.1
> +
> --
> 2.17.1
>
>
>
>
>
>
>
> ----- End forwarded message -----
^ permalink raw reply [flat|nested] 5+ messages in thread* Re: [meta-arm] [PATCH] arm-toolchain: Fix potential runtime crash
2021-02-15 6:36 ` Sumit Garg
@ 2021-02-16 18:45 ` Jon Mason
2021-02-17 9:04 ` Sumit Garg
0 siblings, 1 reply; 5+ messages in thread
From: Jon Mason @ 2021-02-16 18:45 UTC (permalink / raw)
To: Sumit Garg; +Cc: Denys Dmytriyenko, meta-arm
Ccing Denys' correct email address
On Mon, Feb 15, 2021 at 12:06:19PM +0530, Sumit Garg wrote:
> Hi Jon,
>
> On Fri, 12 Feb 2021 at 20:52, Jon Mason <jdmason@kudzu.us> wrote:
> >
> > Unless you have a problem with the patch below, I'm inclined to pull
> > it in ASAP.
>
> Sure, please go ahead to pull it in for dunfell.
Done. Should I do the same for Gatesgarth?
> > However, given that the Arm GCC 9.x has been EoL'ed in
> > favor of the 10.x code, should we just drop support for it?
> >
>
> Yes, I agree we should drop support for Arm GCC 9.x from master
> branch. I kept it there earlier during Arm GCC 10.x addition just for
> the ease of migration.
>
> Let me share a patch for this.
Sounds good.
Thanks,
Jon
>
> -Sumit
>
> > Thanks,
> > Jon
> >
> > ----- Forwarded message from Jon Mason <jon.mason@arm.com> -----
> >
> > Date: Thu, 11 Feb 2021 11:36:47 -0500
> > From: Jon Mason <jon.mason@arm.com>
> > To: meta-arm@lists.yoctoproject.org
> > Subject: [meta-arm] [PATCH] arm-toolchain: Fix potential runtime crash
> >
> > GCCv9 tree vectorization code is faulty and can cause random crashes at
> > runtime (when using -O3). Add the backported patch to address this
> > issue.
> >
> > Change-Id: If7bb0ba0720bab42e7d34f3679d988934f657392
> > Signed-off-by: Jon Mason <jon.mason@arm.com>
> > ---
> > .../recipes-devtools/gcc/gcc-arm-9.2.inc | 1 +
> > ...-PR-tree-optimization-97236-fix-bad-.patch | 119 ++++++++++++++++++
> > 2 files changed, 120 insertions(+)
> > create mode 100644 meta-arm-toolchain/recipes-devtools/gcc/gcc-arm-9.2/0001-Backport-fix-for-PR-tree-optimization-97236-fix-bad-.patch
> >
> > diff --git a/meta-arm-toolchain/recipes-devtools/gcc/gcc-arm-9.2.inc b/meta-arm-toolchain/recipes-devtools/gcc/gcc-arm-9.2.inc
> > index 08ad796..6378ecf 100644
> > --- a/meta-arm-toolchain/recipes-devtools/gcc/gcc-arm-9.2.inc
> > +++ b/meta-arm-toolchain/recipes-devtools/gcc/gcc-arm-9.2.inc
> > @@ -68,6 +68,7 @@ SRC_URI = "\
> > file://0035-Fix-for-testsuite-failure.patch \
> > file://0036-Re-introduce-spe-commandline-options.patch \
> > file://0037-Fix-up-libsanitizer-build-with-master-glibc.patch \
> > + file://0001-Backport-fix-for-PR-tree-optimization-97236-fix-bad-.patch \
> > "
> > SRC_URI[md5sum] = "9c570fc4286825b4e6f67b3d34aade23"
> >
> > diff --git a/meta-arm-toolchain/recipes-devtools/gcc/gcc-arm-9.2/0001-Backport-fix-for-PR-tree-optimization-97236-fix-bad-.patch b/meta-arm-toolchain/recipes-devtools/gcc/gcc-arm-9.2/0001-Backport-fix-for-PR-tree-optimization-97236-fix-bad-.patch
> > new file mode 100644
> > index 0000000..dc1039d
> > --- /dev/null
> > +++ b/meta-arm-toolchain/recipes-devtools/gcc/gcc-arm-9.2/0001-Backport-fix-for-PR-tree-optimization-97236-fix-bad-.patch
> > @@ -0,0 +1,119 @@
> > +Upstream-Status: Backport [https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=97b668f9a8c6ec565c278a60e7d1492a6932e409]
> > +Signed-off-by: Jon Mason <jon.mason@arm.com>
> > +
> > +From 97b668f9a8c6ec565c278a60e7d1492a6932e409 Mon Sep 17 00:00:00 2001
> > +From: Matthias Klose <doko@ubuntu.com>
> > +Date: Tue, 6 Oct 2020 13:41:37 +0200
> > +Subject: [PATCH] Backport fix for PR/tree-optimization/97236 - fix bad use of
> > + VMAT_CONTIGUOUS
> > +
> > +This avoids using VMAT_CONTIGUOUS with single-element interleaving
> > +when using V1mode vectors. Instead keep VMAT_ELEMENTWISE but
> > +continue to avoid load-lanes and gathers.
> > +
> > +2020-10-01 Richard Biener <rguenther@suse.de>
> > +
> > + PR tree-optimization/97236
> > + * tree-vect-stmts.c (get_group_load_store_type): Keep
> > + VMAT_ELEMENTWISE for single-element vectors.
> > +
> > + * gcc.dg/vect/pr97236.c: New testcase.
> > +
> > +(cherry picked from commit 1ab88985631dd2c5a5e3b5c0dce47cf8b6ed2f82)
> > +---
> > + gcc/testsuite/gcc.dg/vect/pr97236.c | 43 +++++++++++++++++++++++++++++
> > + gcc/tree-vect-stmts.c | 20 ++++++--------
> > + 2 files changed, 52 insertions(+), 11 deletions(-)
> > + create mode 100644 gcc/testsuite/gcc.dg/vect/pr97236.c
> > +
> > +diff --git a/gcc/testsuite/gcc.dg/vect/pr97236.c b/gcc/testsuite/gcc.dg/vect/pr97236.c
> > +new file mode 100644
> > +index 000000000000..9d3dc20d953d
> > +--- /dev/null
> > ++++ b/gcc/testsuite/gcc.dg/vect/pr97236.c
> > +@@ -0,0 +1,43 @@
> > ++typedef unsigned char __uint8_t;
> > ++typedef __uint8_t uint8_t;
> > ++typedef struct plane_t {
> > ++ uint8_t *p_pixels;
> > ++ int i_lines;
> > ++ int i_pitch;
> > ++} plane_t;
> > ++
> > ++typedef struct {
> > ++ plane_t p[5];
> > ++} picture_t;
> > ++
> > ++#define N 4
> > ++
> > ++void __attribute__((noipa))
> > ++picture_Clone(picture_t *picture, picture_t *res)
> > ++{
> > ++ for (int i = 0; i < N; i++) {
> > ++ res->p[i].p_pixels = picture->p[i].p_pixels;
> > ++ res->p[i].i_lines = picture->p[i].i_lines;
> > ++ res->p[i].i_pitch = picture->p[i].i_pitch;
> > ++ }
> > ++}
> > ++
> > ++int
> > ++main()
> > ++{
> > ++ picture_t aaa, bbb;
> > ++ uint8_t pixels[10] = {1, 1, 1, 1, 1, 1, 1, 1};
> > ++
> > ++ for (unsigned i = 0; i < N; i++)
> > ++ aaa.p[i].p_pixels = pixels;
> > ++
> > ++ picture_Clone (&aaa, &bbb);
> > ++
> > ++ uint8_t c = 0;
> > ++ for (unsigned i = 0; i < N; i++)
> > ++ c += bbb.p[i].p_pixels[0];
> > ++
> > ++ if (c != N)
> > ++ __builtin_abort ();
> > ++ return 0;
> > ++}
> > +diff --git a/gcc/tree-vect-stmts.c b/gcc/tree-vect-stmts.c
> > +index 507f81b0a0e8..ffbba3441de2 100644
> > +--- a/gcc/tree-vect-stmts.c
> > ++++ b/gcc/tree-vect-stmts.c
> > +@@ -2355,25 +2355,23 @@ get_group_load_store_type (stmt_vec_info stmt_info, tree vectype, bool slp,
> > + /* First cope with the degenerate case of a single-element
> > + vector. */
> > + if (known_eq (TYPE_VECTOR_SUBPARTS (vectype), 1U))
> > +- *memory_access_type = VMAT_CONTIGUOUS;
> > ++ ;
> > +
> > + /* Otherwise try using LOAD/STORE_LANES. */
> > +- if (*memory_access_type == VMAT_ELEMENTWISE
> > +- && (vls_type == VLS_LOAD
> > +- ? vect_load_lanes_supported (vectype, group_size, masked_p)
> > +- : vect_store_lanes_supported (vectype, group_size,
> > +- masked_p)))
> > ++ else if (vls_type == VLS_LOAD
> > ++ ? vect_load_lanes_supported (vectype, group_size, masked_p)
> > ++ : vect_store_lanes_supported (vectype, group_size,
> > ++ masked_p))
> > + {
> > + *memory_access_type = VMAT_LOAD_STORE_LANES;
> > + overrun_p = would_overrun_p;
> > + }
> > +
> > + /* If that fails, try using permuting loads. */
> > +- if (*memory_access_type == VMAT_ELEMENTWISE
> > +- && (vls_type == VLS_LOAD
> > +- ? vect_grouped_load_supported (vectype, single_element_p,
> > +- group_size)
> > +- : vect_grouped_store_supported (vectype, group_size)))
> > ++ else if (vls_type == VLS_LOAD
> > ++ ? vect_grouped_load_supported (vectype, single_element_p,
> > ++ group_size)
> > ++ : vect_grouped_store_supported (vectype, group_size))
> > + {
> > + *memory_access_type = VMAT_CONTIGUOUS_PERMUTE;
> > + overrun_p = would_overrun_p;
> > +--
> > +2.20.1
> > +
> > --
> > 2.17.1
> >
> >
> >
> >
> >
> >
> >
> > ----- End forwarded message -----
^ permalink raw reply [flat|nested] 5+ messages in thread* Re: [meta-arm] [PATCH] arm-toolchain: Fix potential runtime crash
2021-02-16 18:45 ` Jon Mason
@ 2021-02-17 9:04 ` Sumit Garg
0 siblings, 0 replies; 5+ messages in thread
From: Sumit Garg @ 2021-02-17 9:04 UTC (permalink / raw)
To: Jon Mason; +Cc: Denys Dmytriyenko, meta-arm
On Wed, 17 Feb 2021 at 00:15, Jon Mason <jdmason@kudzu.us> wrote:
>
> Ccing Denys' correct email address
>
> On Mon, Feb 15, 2021 at 12:06:19PM +0530, Sumit Garg wrote:
> > Hi Jon,
> >
> > On Fri, 12 Feb 2021 at 20:52, Jon Mason <jdmason@kudzu.us> wrote:
> > >
> > > Unless you have a problem with the patch below, I'm inclined to pull
> > > it in ASAP.
> >
> > Sure, please go ahead to pull it in for dunfell.
>
> Done. Should I do the same for Gatesgarth?
>
Yeah.
-Sumit
> > > However, given that the Arm GCC 9.x has been EoL'ed in
> > > favor of the 10.x code, should we just drop support for it?
> > >
> >
> > Yes, I agree we should drop support for Arm GCC 9.x from master
> > branch. I kept it there earlier during Arm GCC 10.x addition just for
> > the ease of migration.
> >
> > Let me share a patch for this.
>
> Sounds good.
>
> Thanks,
> Jon
>
> >
> > -Sumit
> >
> > > Thanks,
> > > Jon
> > >
> > > ----- Forwarded message from Jon Mason <jon.mason@arm.com> -----
> > >
> > > Date: Thu, 11 Feb 2021 11:36:47 -0500
> > > From: Jon Mason <jon.mason@arm.com>
> > > To: meta-arm@lists.yoctoproject.org
> > > Subject: [meta-arm] [PATCH] arm-toolchain: Fix potential runtime crash
> > >
> > > GCCv9 tree vectorization code is faulty and can cause random crashes at
> > > runtime (when using -O3). Add the backported patch to address this
> > > issue.
> > >
> > > Change-Id: If7bb0ba0720bab42e7d34f3679d988934f657392
> > > Signed-off-by: Jon Mason <jon.mason@arm.com>
> > > ---
> > > .../recipes-devtools/gcc/gcc-arm-9.2.inc | 1 +
> > > ...-PR-tree-optimization-97236-fix-bad-.patch | 119 ++++++++++++++++++
> > > 2 files changed, 120 insertions(+)
> > > create mode 100644 meta-arm-toolchain/recipes-devtools/gcc/gcc-arm-9.2/0001-Backport-fix-for-PR-tree-optimization-97236-fix-bad-.patch
> > >
> > > diff --git a/meta-arm-toolchain/recipes-devtools/gcc/gcc-arm-9.2.inc b/meta-arm-toolchain/recipes-devtools/gcc/gcc-arm-9.2.inc
> > > index 08ad796..6378ecf 100644
> > > --- a/meta-arm-toolchain/recipes-devtools/gcc/gcc-arm-9.2.inc
> > > +++ b/meta-arm-toolchain/recipes-devtools/gcc/gcc-arm-9.2.inc
> > > @@ -68,6 +68,7 @@ SRC_URI = "\
> > > file://0035-Fix-for-testsuite-failure.patch \
> > > file://0036-Re-introduce-spe-commandline-options.patch \
> > > file://0037-Fix-up-libsanitizer-build-with-master-glibc.patch \
> > > + file://0001-Backport-fix-for-PR-tree-optimization-97236-fix-bad-.patch \
> > > "
> > > SRC_URI[md5sum] = "9c570fc4286825b4e6f67b3d34aade23"
> > >
> > > diff --git a/meta-arm-toolchain/recipes-devtools/gcc/gcc-arm-9.2/0001-Backport-fix-for-PR-tree-optimization-97236-fix-bad-.patch b/meta-arm-toolchain/recipes-devtools/gcc/gcc-arm-9.2/0001-Backport-fix-for-PR-tree-optimization-97236-fix-bad-.patch
> > > new file mode 100644
> > > index 0000000..dc1039d
> > > --- /dev/null
> > > +++ b/meta-arm-toolchain/recipes-devtools/gcc/gcc-arm-9.2/0001-Backport-fix-for-PR-tree-optimization-97236-fix-bad-.patch
> > > @@ -0,0 +1,119 @@
> > > +Upstream-Status: Backport [https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=97b668f9a8c6ec565c278a60e7d1492a6932e409]
> > > +Signed-off-by: Jon Mason <jon.mason@arm.com>
> > > +
> > > +From 97b668f9a8c6ec565c278a60e7d1492a6932e409 Mon Sep 17 00:00:00 2001
> > > +From: Matthias Klose <doko@ubuntu.com>
> > > +Date: Tue, 6 Oct 2020 13:41:37 +0200
> > > +Subject: [PATCH] Backport fix for PR/tree-optimization/97236 - fix bad use of
> > > + VMAT_CONTIGUOUS
> > > +
> > > +This avoids using VMAT_CONTIGUOUS with single-element interleaving
> > > +when using V1mode vectors. Instead keep VMAT_ELEMENTWISE but
> > > +continue to avoid load-lanes and gathers.
> > > +
> > > +2020-10-01 Richard Biener <rguenther@suse.de>
> > > +
> > > + PR tree-optimization/97236
> > > + * tree-vect-stmts.c (get_group_load_store_type): Keep
> > > + VMAT_ELEMENTWISE for single-element vectors.
> > > +
> > > + * gcc.dg/vect/pr97236.c: New testcase.
> > > +
> > > +(cherry picked from commit 1ab88985631dd2c5a5e3b5c0dce47cf8b6ed2f82)
> > > +---
> > > + gcc/testsuite/gcc.dg/vect/pr97236.c | 43 +++++++++++++++++++++++++++++
> > > + gcc/tree-vect-stmts.c | 20 ++++++--------
> > > + 2 files changed, 52 insertions(+), 11 deletions(-)
> > > + create mode 100644 gcc/testsuite/gcc.dg/vect/pr97236.c
> > > +
> > > +diff --git a/gcc/testsuite/gcc.dg/vect/pr97236.c b/gcc/testsuite/gcc.dg/vect/pr97236.c
> > > +new file mode 100644
> > > +index 000000000000..9d3dc20d953d
> > > +--- /dev/null
> > > ++++ b/gcc/testsuite/gcc.dg/vect/pr97236.c
> > > +@@ -0,0 +1,43 @@
> > > ++typedef unsigned char __uint8_t;
> > > ++typedef __uint8_t uint8_t;
> > > ++typedef struct plane_t {
> > > ++ uint8_t *p_pixels;
> > > ++ int i_lines;
> > > ++ int i_pitch;
> > > ++} plane_t;
> > > ++
> > > ++typedef struct {
> > > ++ plane_t p[5];
> > > ++} picture_t;
> > > ++
> > > ++#define N 4
> > > ++
> > > ++void __attribute__((noipa))
> > > ++picture_Clone(picture_t *picture, picture_t *res)
> > > ++{
> > > ++ for (int i = 0; i < N; i++) {
> > > ++ res->p[i].p_pixels = picture->p[i].p_pixels;
> > > ++ res->p[i].i_lines = picture->p[i].i_lines;
> > > ++ res->p[i].i_pitch = picture->p[i].i_pitch;
> > > ++ }
> > > ++}
> > > ++
> > > ++int
> > > ++main()
> > > ++{
> > > ++ picture_t aaa, bbb;
> > > ++ uint8_t pixels[10] = {1, 1, 1, 1, 1, 1, 1, 1};
> > > ++
> > > ++ for (unsigned i = 0; i < N; i++)
> > > ++ aaa.p[i].p_pixels = pixels;
> > > ++
> > > ++ picture_Clone (&aaa, &bbb);
> > > ++
> > > ++ uint8_t c = 0;
> > > ++ for (unsigned i = 0; i < N; i++)
> > > ++ c += bbb.p[i].p_pixels[0];
> > > ++
> > > ++ if (c != N)
> > > ++ __builtin_abort ();
> > > ++ return 0;
> > > ++}
> > > +diff --git a/gcc/tree-vect-stmts.c b/gcc/tree-vect-stmts.c
> > > +index 507f81b0a0e8..ffbba3441de2 100644
> > > +--- a/gcc/tree-vect-stmts.c
> > > ++++ b/gcc/tree-vect-stmts.c
> > > +@@ -2355,25 +2355,23 @@ get_group_load_store_type (stmt_vec_info stmt_info, tree vectype, bool slp,
> > > + /* First cope with the degenerate case of a single-element
> > > + vector. */
> > > + if (known_eq (TYPE_VECTOR_SUBPARTS (vectype), 1U))
> > > +- *memory_access_type = VMAT_CONTIGUOUS;
> > > ++ ;
> > > +
> > > + /* Otherwise try using LOAD/STORE_LANES. */
> > > +- if (*memory_access_type == VMAT_ELEMENTWISE
> > > +- && (vls_type == VLS_LOAD
> > > +- ? vect_load_lanes_supported (vectype, group_size, masked_p)
> > > +- : vect_store_lanes_supported (vectype, group_size,
> > > +- masked_p)))
> > > ++ else if (vls_type == VLS_LOAD
> > > ++ ? vect_load_lanes_supported (vectype, group_size, masked_p)
> > > ++ : vect_store_lanes_supported (vectype, group_size,
> > > ++ masked_p))
> > > + {
> > > + *memory_access_type = VMAT_LOAD_STORE_LANES;
> > > + overrun_p = would_overrun_p;
> > > + }
> > > +
> > > + /* If that fails, try using permuting loads. */
> > > +- if (*memory_access_type == VMAT_ELEMENTWISE
> > > +- && (vls_type == VLS_LOAD
> > > +- ? vect_grouped_load_supported (vectype, single_element_p,
> > > +- group_size)
> > > +- : vect_grouped_store_supported (vectype, group_size)))
> > > ++ else if (vls_type == VLS_LOAD
> > > ++ ? vect_grouped_load_supported (vectype, single_element_p,
> > > ++ group_size)
> > > ++ : vect_grouped_store_supported (vectype, group_size))
> > > + {
> > > + *memory_access_type = VMAT_CONTIGUOUS_PERMUTE;
> > > + overrun_p = would_overrun_p;
> > > +--
> > > +2.20.1
> > > +
> > > --
> > > 2.17.1
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > > ----- End forwarded message -----
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2021-02-17 9:05 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-02-12 15:22 [meta-arm] [PATCH] arm-toolchain: Fix potential runtime crash Jon Mason
2021-02-13 20:38 ` Denys Dmytriyenko
2021-02-15 6:36 ` Sumit Garg
2021-02-16 18:45 ` Jon Mason
2021-02-17 9:04 ` Sumit Garg
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