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File _service:tar_scm:0067-Support-m-no-gather-m-no-scatter-to-enable-disable-v.patch of Package gcc
From c269629130cb23252da2db026ce9ed13f57f69f4 Mon Sep 17 00:00:00 2001 From: liuhongt <hongtao.liu@intel.com> Date: Thu, 10 Aug 2023 16:26:13 +0800 Subject: [PATCH 12/32] Support -m[no-]gather -m[no-]scatter to enable/disable vectorization for all gather/scatter instructions Rename original use_gather to use_gather_8parts, Support -mtune-ctrl={,^}use_gather to set/clear tune features use_gather_{2parts, 4parts, 8parts}. Support the new option -mgather as alias of -mtune-ctrl=, use_gather, ^use_gather. Similar for use_scatter. gcc/ChangeLog: * config/i386/i386-builtins.cc (ix86_vectorize_builtin_gather): Adjust for use_gather_8parts. * config/i386/i386-options.cc (parse_mtune_ctrl_str): Set/Clear tune features use_{gather,scatter}_{2parts, 4parts, 8parts} for -mtune-crtl={,^}{use_gather,use_scatter}. * config/i386/i386.cc (ix86_vectorize_builtin_scatter): Adjust for use_scatter_8parts * config/i386/i386.h (TARGET_USE_GATHER): Rename to .. (TARGET_USE_GATHER_8PARTS): .. this. (TARGET_USE_SCATTER): Rename to .. (TARGET_USE_SCATTER_8PARTS): .. this. * config/i386/x86-tune.def (X86_TUNE_USE_GATHER): Rename to (X86_TUNE_USE_GATHER_8PARTS): .. this. (X86_TUNE_USE_SCATTER): Rename to (X86_TUNE_USE_SCATTER_8PARTS): .. this. * config/i386/i386.opt: Add new options mgather, mscatter. (cherry picked from commit b2a927fb5343db363ea4361da0d6bcee227b6737) --- gcc/config/i386/i386-builtins.cc | 2 +- gcc/config/i386/i386-options.cc | 54 +++++++++++++++++++++++--------- gcc/config/i386/i386.cc | 2 +- gcc/config/i386/i386.h | 8 ++--- gcc/config/i386/i386.opt | 4 +++ gcc/config/i386/x86-tune.def | 4 +-- 6 files changed, 52 insertions(+), 22 deletions(-) diff --git a/gcc/config/i386/i386-builtins.cc b/gcc/config/i386/i386-builtins.cc index 050c6228a..8ed32e14f 100644 --- a/gcc/config/i386/i386-builtins.cc +++ b/gcc/config/i386/i386-builtins.cc @@ -1790,7 +1790,7 @@ ix86_vectorize_builtin_gather (const_tree mem_vectype, ? !TARGET_USE_GATHER_2PARTS : (known_eq (TYPE_VECTOR_SUBPARTS (mem_vectype), 4u) ? !TARGET_USE_GATHER_4PARTS - : !TARGET_USE_GATHER))) + : !TARGET_USE_GATHER_8PARTS))) return NULL_TREE; if ((TREE_CODE (index_type) != INTEGER_TYPE diff --git a/gcc/config/i386/i386-options.cc b/gcc/config/i386/i386-options.cc index 9617fc162..3df1f0c41 100644 --- a/gcc/config/i386/i386-options.cc +++ b/gcc/config/i386/i386-options.cc @@ -1705,20 +1705,46 @@ parse_mtune_ctrl_str (struct gcc_options *opts, bool dump) curr_feature_string++; clear = true; } - for (i = 0; i < X86_TUNE_LAST; i++) - { - if (!strcmp (curr_feature_string, ix86_tune_feature_names[i])) - { - ix86_tune_features[i] = !clear; - if (dump) - fprintf (stderr, "Explicitly %s feature %s\n", - clear ? "clear" : "set", ix86_tune_feature_names[i]); - break; - } - } - if (i == X86_TUNE_LAST) - error ("unknown parameter to option %<-mtune-ctrl%>: %s", - clear ? curr_feature_string - 1 : curr_feature_string); + + if (!strcmp (curr_feature_string, "use_gather")) + { + ix86_tune_features[X86_TUNE_USE_GATHER_2PARTS] = !clear; + ix86_tune_features[X86_TUNE_USE_GATHER_4PARTS] = !clear; + ix86_tune_features[X86_TUNE_USE_GATHER_8PARTS] = !clear; + if (dump) + fprintf (stderr, "Explicitly %s features use_gather_2parts," + " use_gather_4parts, use_gather_8parts\n", + clear ? "clear" : "set"); + + } + else if (!strcmp (curr_feature_string, "use_scatter")) + { + ix86_tune_features[X86_TUNE_USE_SCATTER_2PARTS] = !clear; + ix86_tune_features[X86_TUNE_USE_SCATTER_4PARTS] = !clear; + ix86_tune_features[X86_TUNE_USE_SCATTER_8PARTS] = !clear; + if (dump) + fprintf (stderr, "Explicitly %s features use_scatter_2parts," + " use_scatter_4parts, use_scatter_8parts\n", + clear ? "clear" : "set"); + } + else + { + for (i = 0; i < X86_TUNE_LAST; i++) + { + if (!strcmp (curr_feature_string, ix86_tune_feature_names[i])) + { + ix86_tune_features[i] = !clear; + if (dump) + fprintf (stderr, "Explicitly %s feature %s\n", + clear ? "clear" : "set", ix86_tune_feature_names[i]); + break; + } + } + + if (i == X86_TUNE_LAST) + error ("unknown parameter to option %<-mtune-ctrl%>: %s", + clear ? curr_feature_string - 1 : curr_feature_string); + } curr_feature_string = next_feature_string; } while (curr_feature_string); diff --git a/gcc/config/i386/i386.cc b/gcc/config/i386/i386.cc index 479fc6010..e75d37023 100644 --- a/gcc/config/i386/i386.cc +++ b/gcc/config/i386/i386.cc @@ -18937,7 +18937,7 @@ ix86_vectorize_builtin_scatter (const_tree vectype, ? !TARGET_USE_SCATTER_2PARTS : (known_eq (TYPE_VECTOR_SUBPARTS (vectype), 4u) ? !TARGET_USE_SCATTER_4PARTS - : !TARGET_USE_SCATTER)) + : !TARGET_USE_SCATTER_8PARTS)) return NULL_TREE; if ((TREE_CODE (index_type) != INTEGER_TYPE diff --git a/gcc/config/i386/i386.h b/gcc/config/i386/i386.h index 688aaabd3..aaa136ba0 100644 --- a/gcc/config/i386/i386.h +++ b/gcc/config/i386/i386.h @@ -403,10 +403,10 @@ extern unsigned char ix86_tune_features[X86_TUNE_LAST]; ix86_tune_features[X86_TUNE_USE_GATHER_4PARTS] #define TARGET_USE_SCATTER_4PARTS \ ix86_tune_features[X86_TUNE_USE_SCATTER_4PARTS] -#define TARGET_USE_GATHER \ - ix86_tune_features[X86_TUNE_USE_GATHER] -#define TARGET_USE_SCATTER \ - ix86_tune_features[X86_TUNE_USE_SCATTER] +#define TARGET_USE_GATHER_8PARTS \ + ix86_tune_features[X86_TUNE_USE_GATHER_8PARTS] +#define TARGET_USE_SCATTER_8PARTS \ + ix86_tune_features[X86_TUNE_USE_SCATTER_8PARTS] #define TARGET_FUSE_CMP_AND_BRANCH_32 \ ix86_tune_features[X86_TUNE_FUSE_CMP_AND_BRANCH_32] #define TARGET_FUSE_CMP_AND_BRANCH_64 \ diff --git a/gcc/config/i386/i386.opt b/gcc/config/i386/i386.opt index 498fb454d..b154110d8 100644 --- a/gcc/config/i386/i386.opt +++ b/gcc/config/i386/i386.opt @@ -1222,3 +1222,7 @@ Instructions number above which STFL stall penalty can be compensated. munroll-only-small-loops Target Var(ix86_unroll_only_small_loops) Init(0) Save Enable conservative small loop unrolling. + +mscatter +Target Alias(mtune-ctrl=, use_scatter, ^use_scatter) +Enable vectorization for scatter instruction. diff --git a/gcc/config/i386/x86-tune.def b/gcc/config/i386/x86-tune.def index 4392709fc..bdb455d20 100644 --- a/gcc/config/i386/x86-tune.def +++ b/gcc/config/i386/x86-tune.def @@ -488,13 +488,13 @@ DEF_TUNE (X86_TUNE_USE_SCATTER_4PARTS, "use_scatter_4parts", /* X86_TUNE_USE_GATHER: Use gather instructions for vectors with 8 or more elements. */ -DEF_TUNE (X86_TUNE_USE_GATHER, "use_gather", +DEF_TUNE (X86_TUNE_USE_GATHER_8PARTS, "use_gather_8parts", ~(m_ZNVER1 | m_ZNVER2 | m_ZNVER4 | m_ALDERLAKE | m_GENERIC | m_GDS)) /* X86_TUNE_USE_SCATTER: Use scater instructions for vectors with 8 or more elements. */ -DEF_TUNE (X86_TUNE_USE_SCATTER, "use_scatter", +DEF_TUNE (X86_TUNE_USE_SCATTER_8PARTS, "use_scatter_8parts", ~(m_ZNVER4)) /* X86_TUNE_AVOID_128FMA_CHAINS: Avoid creating loops with tight 128bit or -- 2.28.0.windows.1
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