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| author | Andrew Hsieh <andrewhsieh@google.com> | 2014-09-03 15:53:59 +0000 |
|---|---|---|
| committer | Gerrit Code Review <noreply-gerritcodereview@google.com> | 2014-09-03 15:54:00 +0000 |
| commit | 54737a0f41ce0bf1e8f7f8d6d8e3170ef51e07c2 (patch) | |
| tree | afd56565c7170158a14ce5c2fa2a1c8752cf5cb2 /gcc-4.9/gcc/config/i386/i386.c | |
| parent | ecf187208f8ec68c49823080179fa1b5f448a35d (diff) | |
| parent | 55f9fbb03d0413cb8fe74e5ec5d6c2dd4280933e (diff) | |
| download | toolchain_gcc-54737a0f41ce0bf1e8f7f8d6d8e3170ef51e07c2.tar.gz toolchain_gcc-54737a0f41ce0bf1e8f7f8d6d8e3170ef51e07c2.tar.bz2 toolchain_gcc-54737a0f41ce0bf1e8f7f8d6d8e3170ef51e07c2.zip | |
Merge "[4.8, 4.9] Backport of additional SLM tuning."
Diffstat (limited to 'gcc-4.9/gcc/config/i386/i386.c')
| -rw-r--r-- | gcc-4.9/gcc/config/i386/i386.c | 32 |
1 files changed, 27 insertions, 5 deletions
diff --git a/gcc-4.9/gcc/config/i386/i386.c b/gcc-4.9/gcc/config/i386/i386.c index 70f18ad7b..8a1fbde2c 100644 --- a/gcc-4.9/gcc/config/i386/i386.c +++ b/gcc-4.9/gcc/config/i386/i386.c @@ -82,6 +82,7 @@ along with GCC; see the file COPYING3. If not see #include "context.h" #include "pass_manager.h" #include "target-globals.h" +#include "tree-vectorizer.h" static rtx legitimize_dllimport_symbol (rtx, bool); static rtx legitimize_pe_coff_extern_decl (rtx, bool); @@ -1739,7 +1740,7 @@ struct processor_costs slm_cost = { 1, /* scalar load_cost. */ 1, /* scalar_store_cost. */ 1, /* vec_stmt_cost. */ - 1, /* vec_to_scalar_cost. */ + 4, /* vec_to_scalar_cost. */ 1, /* scalar_to_vec_cost. */ 1, /* vec_align_load_cost. */ 2, /* vec_unalign_load_cost. */ @@ -1816,7 +1817,7 @@ struct processor_costs intel_cost = { 1, /* scalar load_cost. */ 1, /* scalar_store_cost. */ 1, /* vec_stmt_cost. */ - 1, /* vec_to_scalar_cost. */ + 4, /* vec_to_scalar_cost. */ 1, /* scalar_to_vec_cost. */ 1, /* vec_align_load_cost. */ 2, /* vec_unalign_load_cost. */ @@ -44300,7 +44301,7 @@ expand_vec_perm_even_odd_1 (struct expand_vec_perm_d *d, unsigned odd) gcc_unreachable (); case V8HImode: - if (TARGET_SSSE3) + if (TARGET_SSSE3 && !TARGET_SLOW_PSHUFB) return expand_vec_perm_pshufb2 (d); else { @@ -44323,7 +44324,7 @@ expand_vec_perm_even_odd_1 (struct expand_vec_perm_d *d, unsigned odd) break; case V16QImode: - if (TARGET_SSSE3) + if (TARGET_SSSE3 && !TARGET_SLOW_PSHUFB) return expand_vec_perm_pshufb2 (d); else { @@ -46493,6 +46494,16 @@ ix86_reassociation_width (unsigned int opc ATTRIBUTE_UNUSED, { int res = 1; + /* Vector part. */ + if (VECTOR_MODE_P (mode)) + { + if (TARGET_VECTOR_PARALLEL_EXECUTION) + return 2; + else + return 1; + } + + /* Scalar part. */ if (INTEGRAL_MODE_P (mode) && TARGET_REASSOC_INT_TO_PARALLEL) res = 2; else if (FLOAT_MODE_P (mode) && TARGET_REASSOC_FP_TO_PARALLEL) @@ -46592,7 +46603,6 @@ ix86_add_stmt_cost (void *data, int count, enum vect_cost_for_stmt kind, { unsigned *cost = (unsigned *) data; unsigned retval = 0; - tree vectype = stmt_info ? stmt_vectype (stmt_info) : NULL_TREE; int stmt_cost = ix86_builtin_vectorization_cost (kind, vectype, misalign); @@ -46603,6 +46613,18 @@ ix86_add_stmt_cost (void *data, int count, enum vect_cost_for_stmt kind, count *= 50; /* FIXME. */ retval = (unsigned) (count * stmt_cost); + + /* We need to multiply all vector stmt cost by 1.7 (estimated cost) + for Silvermont as it has out of order integer pipeline and can execute + 2 scalar instruction per tick, but has in order SIMD pipeline. */ + if (TARGET_SILVERMONT || TARGET_INTEL) + if (stmt_info && stmt_info->stmt) + { + tree lhs_op = gimple_get_lhs (stmt_info->stmt); + if (lhs_op && TREE_CODE (TREE_TYPE (lhs_op)) == INTEGER_TYPE) + retval = (retval * 17) / 10; + } + cost[where] += retval; return retval; |