* [PATCH] Software mitigation: Disable gather generation in vectorization for GDS affected Intel Processors.
@ 2023-08-11 0:38 liuhongt
2023-08-16 7:34 ` Hongtao Liu
0 siblings, 1 reply; 2+ messages in thread
From: liuhongt @ 2023-08-11 0:38 UTC (permalink / raw)
To: gcc-patches; +Cc: crazylht, hjl.tools
For more details of GDS (Gather Data Sampling), refer to
https://www.intel.com/content/www/us/en/developer/articles/technical/software-security-guidance/advisory-guidance/gather-data-sampling.html
After microcode update, there's performance regression. To avoid that,
the patch disables gather generation in autovectorization but uses
gather scalar emulation instead.
Ready push to trunk and backport.
any comments?
gcc/ChangeLog:
* config/i386/i386-options.cc (m_GDS): New macro.
* config/i386/x86-tune.def (X86_TUNE_USE_GATHER_2PARTS): Don't
enable for m_GDS.
(X86_TUNE_USE_GATHER_4PARTS): Ditto.
(X86_TUNE_USE_GATHER): Ditto.
gcc/testsuite/ChangeLog:
* gcc.target/i386/avx2-gather-2.c: Adjust options to keep
gather vectorization.
* gcc.target/i386/avx2-gather-6.c: Ditto.
* gcc.target/i386/avx512f-pr88464-1.c: Ditto.
* gcc.target/i386/avx512f-pr88464-5.c: Ditto.
* gcc.target/i386/avx512vl-pr88464-1.c: Ditto.
* gcc.target/i386/avx512vl-pr88464-11.c: Ditto.
* gcc.target/i386/avx512vl-pr88464-3.c: Ditto.
* gcc.target/i386/avx512vl-pr88464-9.c: Ditto.
* gcc.target/i386/pr88531-1b.c: Ditto.
* gcc.target/i386/pr88531-1c.c: Ditto.
---
gcc/config/i386/i386-options.cc | 5 +++++
gcc/config/i386/x86-tune.def | 6 +++---
gcc/testsuite/gcc.target/i386/avx2-gather-2.c | 2 +-
gcc/testsuite/gcc.target/i386/avx2-gather-6.c | 2 +-
gcc/testsuite/gcc.target/i386/avx512f-pr88464-1.c | 2 +-
gcc/testsuite/gcc.target/i386/avx512f-pr88464-5.c | 2 +-
gcc/testsuite/gcc.target/i386/avx512vl-pr88464-1.c | 2 +-
gcc/testsuite/gcc.target/i386/avx512vl-pr88464-11.c | 2 +-
gcc/testsuite/gcc.target/i386/avx512vl-pr88464-3.c | 2 +-
gcc/testsuite/gcc.target/i386/avx512vl-pr88464-9.c | 2 +-
gcc/testsuite/gcc.target/i386/pr88531-1b.c | 2 +-
gcc/testsuite/gcc.target/i386/pr88531-1c.c | 2 +-
12 files changed, 18 insertions(+), 13 deletions(-)
diff --git a/gcc/config/i386/i386-options.cc b/gcc/config/i386/i386-options.cc
index 127ee24203c..e6ba33c370d 100644
--- a/gcc/config/i386/i386-options.cc
+++ b/gcc/config/i386/i386-options.cc
@@ -141,6 +141,11 @@ along with GCC; see the file COPYING3. If not see
#define m_ARROWLAKE (HOST_WIDE_INT_1U<<PROCESSOR_ARROWLAKE)
#define m_CORE_ATOM (m_SIERRAFOREST | m_GRANDRIDGE)
#define m_INTEL (HOST_WIDE_INT_1U<<PROCESSOR_INTEL)
+/* Gather Data Sampling / CVE-2022-40982 / INTEL-SA-00828.
+ Software mitigation. */
+#define m_GDS (m_SKYLAKE | m_SKYLAKE_AVX512 | m_CANNONLAKE \
+ | m_ICELAKE_CLIENT | m_ICELAKE_SERVER | m_CASCADELAKE \
+ | m_TIGERLAKE | m_COOPERLAKE | m_ROCKETLAKE)
#define m_LUJIAZUI (HOST_WIDE_INT_1U<<PROCESSOR_LUJIAZUI)
diff --git a/gcc/config/i386/x86-tune.def b/gcc/config/i386/x86-tune.def
index 40e04ecddbf..22d26bb0030 100644
--- a/gcc/config/i386/x86-tune.def
+++ b/gcc/config/i386/x86-tune.def
@@ -491,7 +491,7 @@ DEF_TUNE (X86_TUNE_AVOID_4BYTE_PREFIXES, "avoid_4byte_prefixes",
elements. */
DEF_TUNE (X86_TUNE_USE_GATHER_2PARTS, "use_gather_2parts",
~(m_ZNVER1 | m_ZNVER2 | m_ZNVER3 | m_ZNVER4 | m_ALDERLAKE
- | m_ARROWLAKE | m_CORE_ATOM | m_GENERIC))
+ | m_ARROWLAKE | m_CORE_ATOM | m_GENERIC | m_GDS))
/* X86_TUNE_USE_SCATTER_2PARTS: Use scater instructions for vectors with 2
elements. */
@@ -502,7 +502,7 @@ DEF_TUNE (X86_TUNE_USE_SCATTER_2PARTS, "use_scatter_2parts",
elements. */
DEF_TUNE (X86_TUNE_USE_GATHER_4PARTS, "use_gather_4parts",
~(m_ZNVER1 | m_ZNVER2 | m_ZNVER3 | m_ZNVER4 | m_ALDERLAKE
- | m_ARROWLAKE | m_CORE_ATOM | m_GENERIC))
+ | m_ARROWLAKE | m_CORE_ATOM | m_GENERIC | m_GDS))
/* X86_TUNE_USE_SCATTER_4PARTS: Use scater instructions for vectors with 4
elements. */
@@ -513,7 +513,7 @@ DEF_TUNE (X86_TUNE_USE_SCATTER_4PARTS, "use_scatter_4parts",
elements. */
DEF_TUNE (X86_TUNE_USE_GATHER, "use_gather",
~(m_ZNVER1 | m_ZNVER2 | m_ZNVER4 | m_ALDERLAKE | m_ARROWLAKE
- | m_CORE_ATOM | m_GENERIC))
+ | m_CORE_ATOM | m_GENERIC | m_GDS))
/* X86_TUNE_USE_SCATTER: Use scater instructions for vectors with 8 or more
elements. */
diff --git a/gcc/testsuite/gcc.target/i386/avx2-gather-2.c b/gcc/testsuite/gcc.target/i386/avx2-gather-2.c
index ad5ef73107c..978924b0f57 100644
--- a/gcc/testsuite/gcc.target/i386/avx2-gather-2.c
+++ b/gcc/testsuite/gcc.target/i386/avx2-gather-2.c
@@ -1,5 +1,5 @@
/* { dg-do compile } */
-/* { dg-options "-O3 -fdump-tree-vect-details -march=skylake" } */
+/* { dg-options "-O3 -fdump-tree-vect-details -march=skylake -mtune=haswell" } */
#include "avx2-gather-1.c"
diff --git a/gcc/testsuite/gcc.target/i386/avx2-gather-6.c b/gcc/testsuite/gcc.target/i386/avx2-gather-6.c
index 47a95dbe989..0bb40ac14eb 100644
--- a/gcc/testsuite/gcc.target/i386/avx2-gather-6.c
+++ b/gcc/testsuite/gcc.target/i386/avx2-gather-6.c
@@ -1,5 +1,5 @@
/* { dg-do compile } */
-/* { dg-options "-O3 -mavx2 -fno-common -fdump-tree-vect-details -mtune=skylake -fno-split-loops" } */
+/* { dg-options "-O3 -mavx2 -fno-common -fdump-tree-vect-details -mtune=haswell -fno-split-loops" } */
#include "avx2-gather-5.c"
diff --git a/gcc/testsuite/gcc.target/i386/avx512f-pr88464-1.c b/gcc/testsuite/gcc.target/i386/avx512f-pr88464-1.c
index 06d21bb0129..d1a2298618e 100644
--- a/gcc/testsuite/gcc.target/i386/avx512f-pr88464-1.c
+++ b/gcc/testsuite/gcc.target/i386/avx512f-pr88464-1.c
@@ -1,6 +1,6 @@
/* PR tree-optimization/88464 */
/* { dg-do compile } */
-/* { dg-options "-O3 -mavx512f -mprefer-vector-width=512 -mtune=skylake-avx512 -fdump-tree-vect-details" } */
+/* { dg-options "-O3 -mavx512f -mprefer-vector-width=512 -mtune=haswell -fdump-tree-vect-details" } */
/* { dg-final { scan-tree-dump-times "loop vectorized using 64 byte vectors" 4 "vect" } } */
/* { dg-final { scan-tree-dump-times "vectorized 1 loops in function" 4 "vect" } } */
diff --git a/gcc/testsuite/gcc.target/i386/avx512f-pr88464-5.c b/gcc/testsuite/gcc.target/i386/avx512f-pr88464-5.c
index 462e951fdc1..d7b0b2b28cb 100644
--- a/gcc/testsuite/gcc.target/i386/avx512f-pr88464-5.c
+++ b/gcc/testsuite/gcc.target/i386/avx512f-pr88464-5.c
@@ -1,6 +1,6 @@
/* PR tree-optimization/88464 */
/* { dg-do compile } */
-/* { dg-options "-O3 -mavx512f -mprefer-vector-width=512 -mtune=skylake-avx512 -fdump-tree-vect-details" } */
+/* { dg-options "-O3 -mavx512f -mprefer-vector-width=512 -mtune=haswell -fdump-tree-vect-details" } */
/* { dg-final { scan-tree-dump-times "loop vectorized using 64 byte vectors" 4 "vect" } } */
/* { dg-final { scan-tree-dump-times "vectorized 1 loops in function" 4 "vect" } } */
diff --git a/gcc/testsuite/gcc.target/i386/avx512vl-pr88464-1.c b/gcc/testsuite/gcc.target/i386/avx512vl-pr88464-1.c
index 55a28dddbf8..07439185ec1 100644
--- a/gcc/testsuite/gcc.target/i386/avx512vl-pr88464-1.c
+++ b/gcc/testsuite/gcc.target/i386/avx512vl-pr88464-1.c
@@ -1,6 +1,6 @@
/* PR tree-optimization/88464 */
/* { dg-do compile } */
-/* { dg-options "-O3 -mavx512vl -mprefer-vector-width=256 -mtune=skylake-avx512 -fdump-tree-vect-details" } */
+/* { dg-options "-O3 -mavx512vl -mprefer-vector-width=256 -mtune=haswell -fdump-tree-vect-details" } */
/* { dg-final { scan-tree-dump-times "loop vectorized using 32 byte vectors" 4 "vect" } } */
/* { dg-final { scan-tree-dump-times "vectorized 1 loops in function" 4 "vect" } } */
diff --git a/gcc/testsuite/gcc.target/i386/avx512vl-pr88464-11.c b/gcc/testsuite/gcc.target/i386/avx512vl-pr88464-11.c
index 9696008855d..3a98108279a 100644
--- a/gcc/testsuite/gcc.target/i386/avx512vl-pr88464-11.c
+++ b/gcc/testsuite/gcc.target/i386/avx512vl-pr88464-11.c
@@ -1,6 +1,6 @@
/* PR tree-optimization/88464 */
/* { dg-do compile } */
-/* { dg-options "-O3 -mavx512vl -mprefer-vector-width=128 -mtune=skylake-avx512 -fdump-tree-vect-details" } */
+/* { dg-options "-O3 -mavx512vl -mprefer-vector-width=128 -mtune=haswell -fdump-tree-vect-details" } */
/* { dg-final { scan-tree-dump-times "loop vectorized using 16 byte vectors" 4 "vect" } } */
/* { dg-final { scan-tree-dump-times "vectorized 1 loops in function" 4 "vect" } } */
diff --git a/gcc/testsuite/gcc.target/i386/avx512vl-pr88464-3.c b/gcc/testsuite/gcc.target/i386/avx512vl-pr88464-3.c
index 6b0c8a85957..ac669e04812 100644
--- a/gcc/testsuite/gcc.target/i386/avx512vl-pr88464-3.c
+++ b/gcc/testsuite/gcc.target/i386/avx512vl-pr88464-3.c
@@ -1,6 +1,6 @@
/* PR tree-optimization/88464 */
/* { dg-do compile } */
-/* { dg-options "-O3 -mavx512vl -mprefer-vector-width=128 -mtune=skylake-avx512 -fdump-tree-vect-details" } */
+/* { dg-options "-O3 -mavx512vl -mprefer-vector-width=128 -mtune=haswell -fdump-tree-vect-details" } */
/* { dg-final { scan-tree-dump-times "loop vectorized using 16 byte vectors" 4 "vect" } } */
/* { dg-final { scan-tree-dump-times "vectorized 1 loops in function" 4 "vect" } } */
diff --git a/gcc/testsuite/gcc.target/i386/avx512vl-pr88464-9.c b/gcc/testsuite/gcc.target/i386/avx512vl-pr88464-9.c
index 3af568ab323..14a1083b6d1 100644
--- a/gcc/testsuite/gcc.target/i386/avx512vl-pr88464-9.c
+++ b/gcc/testsuite/gcc.target/i386/avx512vl-pr88464-9.c
@@ -1,6 +1,6 @@
/* PR tree-optimization/88464 */
/* { dg-do compile } */
-/* { dg-options "-O3 -mavx512vl -mprefer-vector-width=256 -mtune=skylake-avx512 -fdump-tree-vect-details" } */
+/* { dg-options "-O3 -mavx512vl -mprefer-vector-width=256 -mtune=haswell -fdump-tree-vect-details" } */
/* { dg-final { scan-tree-dump-times "loop vectorized using 32 byte vectors" 4 "vect" } } */
/* { dg-final { scan-tree-dump-times "vectorized 1 loops in function" 4 "vect" } } */
diff --git a/gcc/testsuite/gcc.target/i386/pr88531-1b.c b/gcc/testsuite/gcc.target/i386/pr88531-1b.c
index 812c8a10fab..e6df789de90 100644
--- a/gcc/testsuite/gcc.target/i386/pr88531-1b.c
+++ b/gcc/testsuite/gcc.target/i386/pr88531-1b.c
@@ -1,5 +1,5 @@
/* { dg-do compile } */
-/* { dg-options "-O3 -march=skylake -mfpmath=sse" } */
+/* { dg-options "-O3 -march=skylake -mfpmath=sse -mtune=haswell" } */
#include "pr88531-1a.c"
diff --git a/gcc/testsuite/gcc.target/i386/pr88531-1c.c b/gcc/testsuite/gcc.target/i386/pr88531-1c.c
index 43fc5913ed3..a093c87c01f 100644
--- a/gcc/testsuite/gcc.target/i386/pr88531-1c.c
+++ b/gcc/testsuite/gcc.target/i386/pr88531-1c.c
@@ -1,5 +1,5 @@
/* { dg-do compile } */
-/* { dg-options "-O3 -march=skylake-avx512 -mfpmath=sse" } */
+/* { dg-options "-O3 -march=skylake-avx512 -mfpmath=sse -mtune=haswell" } */
#include "pr88531-1a.c"
--
2.31.1
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [PATCH] Software mitigation: Disable gather generation in vectorization for GDS affected Intel Processors.
2023-08-11 0:38 [PATCH] Software mitigation: Disable gather generation in vectorization for GDS affected Intel Processors liuhongt
@ 2023-08-16 7:34 ` Hongtao Liu
0 siblings, 0 replies; 2+ messages in thread
From: Hongtao Liu @ 2023-08-16 7:34 UTC (permalink / raw)
To: liuhongt; +Cc: gcc-patches, hjl.tools
On Fri, Aug 11, 2023 at 8:38 AM liuhongt <hongtao.liu@intel.com> wrote:
>
> For more details of GDS (Gather Data Sampling), refer to
> https://www.intel.com/content/www/us/en/developer/articles/technical/software-security-guidance/advisory-guidance/gather-data-sampling.html
>
> After microcode update, there's performance regression. To avoid that,
> the patch disables gather generation in autovectorization but uses
> gather scalar emulation instead.
>
> Ready push to trunk and backport.
> any comments?
Pushed to trunk and backport to releases/gcc-{11,12,13}.
>
> gcc/ChangeLog:
>
> * config/i386/i386-options.cc (m_GDS): New macro.
> * config/i386/x86-tune.def (X86_TUNE_USE_GATHER_2PARTS): Don't
> enable for m_GDS.
> (X86_TUNE_USE_GATHER_4PARTS): Ditto.
> (X86_TUNE_USE_GATHER): Ditto.
>
> gcc/testsuite/ChangeLog:
>
> * gcc.target/i386/avx2-gather-2.c: Adjust options to keep
> gather vectorization.
> * gcc.target/i386/avx2-gather-6.c: Ditto.
> * gcc.target/i386/avx512f-pr88464-1.c: Ditto.
> * gcc.target/i386/avx512f-pr88464-5.c: Ditto.
> * gcc.target/i386/avx512vl-pr88464-1.c: Ditto.
> * gcc.target/i386/avx512vl-pr88464-11.c: Ditto.
> * gcc.target/i386/avx512vl-pr88464-3.c: Ditto.
> * gcc.target/i386/avx512vl-pr88464-9.c: Ditto.
> * gcc.target/i386/pr88531-1b.c: Ditto.
> * gcc.target/i386/pr88531-1c.c: Ditto.
> ---
> gcc/config/i386/i386-options.cc | 5 +++++
> gcc/config/i386/x86-tune.def | 6 +++---
> gcc/testsuite/gcc.target/i386/avx2-gather-2.c | 2 +-
> gcc/testsuite/gcc.target/i386/avx2-gather-6.c | 2 +-
> gcc/testsuite/gcc.target/i386/avx512f-pr88464-1.c | 2 +-
> gcc/testsuite/gcc.target/i386/avx512f-pr88464-5.c | 2 +-
> gcc/testsuite/gcc.target/i386/avx512vl-pr88464-1.c | 2 +-
> gcc/testsuite/gcc.target/i386/avx512vl-pr88464-11.c | 2 +-
> gcc/testsuite/gcc.target/i386/avx512vl-pr88464-3.c | 2 +-
> gcc/testsuite/gcc.target/i386/avx512vl-pr88464-9.c | 2 +-
> gcc/testsuite/gcc.target/i386/pr88531-1b.c | 2 +-
> gcc/testsuite/gcc.target/i386/pr88531-1c.c | 2 +-
> 12 files changed, 18 insertions(+), 13 deletions(-)
>
> diff --git a/gcc/config/i386/i386-options.cc b/gcc/config/i386/i386-options.cc
> index 127ee24203c..e6ba33c370d 100644
> --- a/gcc/config/i386/i386-options.cc
> +++ b/gcc/config/i386/i386-options.cc
> @@ -141,6 +141,11 @@ along with GCC; see the file COPYING3. If not see
> #define m_ARROWLAKE (HOST_WIDE_INT_1U<<PROCESSOR_ARROWLAKE)
> #define m_CORE_ATOM (m_SIERRAFOREST | m_GRANDRIDGE)
> #define m_INTEL (HOST_WIDE_INT_1U<<PROCESSOR_INTEL)
> +/* Gather Data Sampling / CVE-2022-40982 / INTEL-SA-00828.
> + Software mitigation. */
> +#define m_GDS (m_SKYLAKE | m_SKYLAKE_AVX512 | m_CANNONLAKE \
> + | m_ICELAKE_CLIENT | m_ICELAKE_SERVER | m_CASCADELAKE \
> + | m_TIGERLAKE | m_COOPERLAKE | m_ROCKETLAKE)
>
> #define m_LUJIAZUI (HOST_WIDE_INT_1U<<PROCESSOR_LUJIAZUI)
>
> diff --git a/gcc/config/i386/x86-tune.def b/gcc/config/i386/x86-tune.def
> index 40e04ecddbf..22d26bb0030 100644
> --- a/gcc/config/i386/x86-tune.def
> +++ b/gcc/config/i386/x86-tune.def
> @@ -491,7 +491,7 @@ DEF_TUNE (X86_TUNE_AVOID_4BYTE_PREFIXES, "avoid_4byte_prefixes",
> elements. */
> DEF_TUNE (X86_TUNE_USE_GATHER_2PARTS, "use_gather_2parts",
> ~(m_ZNVER1 | m_ZNVER2 | m_ZNVER3 | m_ZNVER4 | m_ALDERLAKE
> - | m_ARROWLAKE | m_CORE_ATOM | m_GENERIC))
> + | m_ARROWLAKE | m_CORE_ATOM | m_GENERIC | m_GDS))
>
> /* X86_TUNE_USE_SCATTER_2PARTS: Use scater instructions for vectors with 2
> elements. */
> @@ -502,7 +502,7 @@ DEF_TUNE (X86_TUNE_USE_SCATTER_2PARTS, "use_scatter_2parts",
> elements. */
> DEF_TUNE (X86_TUNE_USE_GATHER_4PARTS, "use_gather_4parts",
> ~(m_ZNVER1 | m_ZNVER2 | m_ZNVER3 | m_ZNVER4 | m_ALDERLAKE
> - | m_ARROWLAKE | m_CORE_ATOM | m_GENERIC))
> + | m_ARROWLAKE | m_CORE_ATOM | m_GENERIC | m_GDS))
>
> /* X86_TUNE_USE_SCATTER_4PARTS: Use scater instructions for vectors with 4
> elements. */
> @@ -513,7 +513,7 @@ DEF_TUNE (X86_TUNE_USE_SCATTER_4PARTS, "use_scatter_4parts",
> elements. */
> DEF_TUNE (X86_TUNE_USE_GATHER, "use_gather",
> ~(m_ZNVER1 | m_ZNVER2 | m_ZNVER4 | m_ALDERLAKE | m_ARROWLAKE
> - | m_CORE_ATOM | m_GENERIC))
> + | m_CORE_ATOM | m_GENERIC | m_GDS))
>
> /* X86_TUNE_USE_SCATTER: Use scater instructions for vectors with 8 or more
> elements. */
> diff --git a/gcc/testsuite/gcc.target/i386/avx2-gather-2.c b/gcc/testsuite/gcc.target/i386/avx2-gather-2.c
> index ad5ef73107c..978924b0f57 100644
> --- a/gcc/testsuite/gcc.target/i386/avx2-gather-2.c
> +++ b/gcc/testsuite/gcc.target/i386/avx2-gather-2.c
> @@ -1,5 +1,5 @@
> /* { dg-do compile } */
> -/* { dg-options "-O3 -fdump-tree-vect-details -march=skylake" } */
> +/* { dg-options "-O3 -fdump-tree-vect-details -march=skylake -mtune=haswell" } */
>
> #include "avx2-gather-1.c"
>
> diff --git a/gcc/testsuite/gcc.target/i386/avx2-gather-6.c b/gcc/testsuite/gcc.target/i386/avx2-gather-6.c
> index 47a95dbe989..0bb40ac14eb 100644
> --- a/gcc/testsuite/gcc.target/i386/avx2-gather-6.c
> +++ b/gcc/testsuite/gcc.target/i386/avx2-gather-6.c
> @@ -1,5 +1,5 @@
> /* { dg-do compile } */
> -/* { dg-options "-O3 -mavx2 -fno-common -fdump-tree-vect-details -mtune=skylake -fno-split-loops" } */
> +/* { dg-options "-O3 -mavx2 -fno-common -fdump-tree-vect-details -mtune=haswell -fno-split-loops" } */
>
> #include "avx2-gather-5.c"
>
> diff --git a/gcc/testsuite/gcc.target/i386/avx512f-pr88464-1.c b/gcc/testsuite/gcc.target/i386/avx512f-pr88464-1.c
> index 06d21bb0129..d1a2298618e 100644
> --- a/gcc/testsuite/gcc.target/i386/avx512f-pr88464-1.c
> +++ b/gcc/testsuite/gcc.target/i386/avx512f-pr88464-1.c
> @@ -1,6 +1,6 @@
> /* PR tree-optimization/88464 */
> /* { dg-do compile } */
> -/* { dg-options "-O3 -mavx512f -mprefer-vector-width=512 -mtune=skylake-avx512 -fdump-tree-vect-details" } */
> +/* { dg-options "-O3 -mavx512f -mprefer-vector-width=512 -mtune=haswell -fdump-tree-vect-details" } */
> /* { dg-final { scan-tree-dump-times "loop vectorized using 64 byte vectors" 4 "vect" } } */
> /* { dg-final { scan-tree-dump-times "vectorized 1 loops in function" 4 "vect" } } */
>
> diff --git a/gcc/testsuite/gcc.target/i386/avx512f-pr88464-5.c b/gcc/testsuite/gcc.target/i386/avx512f-pr88464-5.c
> index 462e951fdc1..d7b0b2b28cb 100644
> --- a/gcc/testsuite/gcc.target/i386/avx512f-pr88464-5.c
> +++ b/gcc/testsuite/gcc.target/i386/avx512f-pr88464-5.c
> @@ -1,6 +1,6 @@
> /* PR tree-optimization/88464 */
> /* { dg-do compile } */
> -/* { dg-options "-O3 -mavx512f -mprefer-vector-width=512 -mtune=skylake-avx512 -fdump-tree-vect-details" } */
> +/* { dg-options "-O3 -mavx512f -mprefer-vector-width=512 -mtune=haswell -fdump-tree-vect-details" } */
> /* { dg-final { scan-tree-dump-times "loop vectorized using 64 byte vectors" 4 "vect" } } */
> /* { dg-final { scan-tree-dump-times "vectorized 1 loops in function" 4 "vect" } } */
>
> diff --git a/gcc/testsuite/gcc.target/i386/avx512vl-pr88464-1.c b/gcc/testsuite/gcc.target/i386/avx512vl-pr88464-1.c
> index 55a28dddbf8..07439185ec1 100644
> --- a/gcc/testsuite/gcc.target/i386/avx512vl-pr88464-1.c
> +++ b/gcc/testsuite/gcc.target/i386/avx512vl-pr88464-1.c
> @@ -1,6 +1,6 @@
> /* PR tree-optimization/88464 */
> /* { dg-do compile } */
> -/* { dg-options "-O3 -mavx512vl -mprefer-vector-width=256 -mtune=skylake-avx512 -fdump-tree-vect-details" } */
> +/* { dg-options "-O3 -mavx512vl -mprefer-vector-width=256 -mtune=haswell -fdump-tree-vect-details" } */
> /* { dg-final { scan-tree-dump-times "loop vectorized using 32 byte vectors" 4 "vect" } } */
> /* { dg-final { scan-tree-dump-times "vectorized 1 loops in function" 4 "vect" } } */
>
> diff --git a/gcc/testsuite/gcc.target/i386/avx512vl-pr88464-11.c b/gcc/testsuite/gcc.target/i386/avx512vl-pr88464-11.c
> index 9696008855d..3a98108279a 100644
> --- a/gcc/testsuite/gcc.target/i386/avx512vl-pr88464-11.c
> +++ b/gcc/testsuite/gcc.target/i386/avx512vl-pr88464-11.c
> @@ -1,6 +1,6 @@
> /* PR tree-optimization/88464 */
> /* { dg-do compile } */
> -/* { dg-options "-O3 -mavx512vl -mprefer-vector-width=128 -mtune=skylake-avx512 -fdump-tree-vect-details" } */
> +/* { dg-options "-O3 -mavx512vl -mprefer-vector-width=128 -mtune=haswell -fdump-tree-vect-details" } */
> /* { dg-final { scan-tree-dump-times "loop vectorized using 16 byte vectors" 4 "vect" } } */
> /* { dg-final { scan-tree-dump-times "vectorized 1 loops in function" 4 "vect" } } */
>
> diff --git a/gcc/testsuite/gcc.target/i386/avx512vl-pr88464-3.c b/gcc/testsuite/gcc.target/i386/avx512vl-pr88464-3.c
> index 6b0c8a85957..ac669e04812 100644
> --- a/gcc/testsuite/gcc.target/i386/avx512vl-pr88464-3.c
> +++ b/gcc/testsuite/gcc.target/i386/avx512vl-pr88464-3.c
> @@ -1,6 +1,6 @@
> /* PR tree-optimization/88464 */
> /* { dg-do compile } */
> -/* { dg-options "-O3 -mavx512vl -mprefer-vector-width=128 -mtune=skylake-avx512 -fdump-tree-vect-details" } */
> +/* { dg-options "-O3 -mavx512vl -mprefer-vector-width=128 -mtune=haswell -fdump-tree-vect-details" } */
> /* { dg-final { scan-tree-dump-times "loop vectorized using 16 byte vectors" 4 "vect" } } */
> /* { dg-final { scan-tree-dump-times "vectorized 1 loops in function" 4 "vect" } } */
>
> diff --git a/gcc/testsuite/gcc.target/i386/avx512vl-pr88464-9.c b/gcc/testsuite/gcc.target/i386/avx512vl-pr88464-9.c
> index 3af568ab323..14a1083b6d1 100644
> --- a/gcc/testsuite/gcc.target/i386/avx512vl-pr88464-9.c
> +++ b/gcc/testsuite/gcc.target/i386/avx512vl-pr88464-9.c
> @@ -1,6 +1,6 @@
> /* PR tree-optimization/88464 */
> /* { dg-do compile } */
> -/* { dg-options "-O3 -mavx512vl -mprefer-vector-width=256 -mtune=skylake-avx512 -fdump-tree-vect-details" } */
> +/* { dg-options "-O3 -mavx512vl -mprefer-vector-width=256 -mtune=haswell -fdump-tree-vect-details" } */
> /* { dg-final { scan-tree-dump-times "loop vectorized using 32 byte vectors" 4 "vect" } } */
> /* { dg-final { scan-tree-dump-times "vectorized 1 loops in function" 4 "vect" } } */
>
> diff --git a/gcc/testsuite/gcc.target/i386/pr88531-1b.c b/gcc/testsuite/gcc.target/i386/pr88531-1b.c
> index 812c8a10fab..e6df789de90 100644
> --- a/gcc/testsuite/gcc.target/i386/pr88531-1b.c
> +++ b/gcc/testsuite/gcc.target/i386/pr88531-1b.c
> @@ -1,5 +1,5 @@
> /* { dg-do compile } */
> -/* { dg-options "-O3 -march=skylake -mfpmath=sse" } */
> +/* { dg-options "-O3 -march=skylake -mfpmath=sse -mtune=haswell" } */
>
> #include "pr88531-1a.c"
>
> diff --git a/gcc/testsuite/gcc.target/i386/pr88531-1c.c b/gcc/testsuite/gcc.target/i386/pr88531-1c.c
> index 43fc5913ed3..a093c87c01f 100644
> --- a/gcc/testsuite/gcc.target/i386/pr88531-1c.c
> +++ b/gcc/testsuite/gcc.target/i386/pr88531-1c.c
> @@ -1,5 +1,5 @@
> /* { dg-do compile } */
> -/* { dg-options "-O3 -march=skylake-avx512 -mfpmath=sse" } */
> +/* { dg-options "-O3 -march=skylake-avx512 -mfpmath=sse -mtune=haswell" } */
>
> #include "pr88531-1a.c"
>
> --
> 2.31.1
>
--
BR,
Hongtao
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2023-08-11 0:38 [PATCH] Software mitigation: Disable gather generation in vectorization for GDS affected Intel Processors liuhongt
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