[PATCH 3/7] OpenMP 4.0 offloading infrastructure: Offload tables.
gcc/ * Makefile.in (GTFILES): Add omp-low.h to list of GC files. * cgraphunit.c: Include omp-low.h. * doc/tm.texi: Regenerate. * doc/tm.texi.in (TARGET_RECORD_OFFLOAD_SYMBOL): Document. * gengtype.c (open_base_files): Add omp-low.h to ifiles. * lto-cgraph.c (output_offload_tables): New function. (input_offload_tables): Likewise. * lto-section-in.c (lto_section_name): Add "offload_table". * lto-section-names.h (OFFLOAD_VAR_TABLE_SECTION_NAME): Define. (OFFLOAD_FUNC_TABLE_SECTION_NAME): Likewise. * lto-streamer-out.c (lto_output): Call output_offload_tables. * lto-streamer.h (lto_section_type): Add LTO_section_offload_table. (output_offload_tables, input_offload_tables): Declare. * omp-low.c: Include common/common-target.h and lto-section-names.h. (offload_funcs, offload_vars): New global <tree, va_gc> vectors. (expand_omp_target): Add child_fn into offload_funcs vector. (add_decls_addresses_to_decl_constructor): New function. (omp_finish_file): Likewise. * omp-low.h (omp_finish_file, offload_funcs, offload_vars): Declare. * target.def (record_offload_symbol): New DEFHOOK. * toplev.c: Include omp-low.h. (compile_file): Call omp_finish_file. * varpool.c: Include omp-low.h. (varpool_node::get_create): Add decl into offload_vars vector. gcc/lto/ * lto/lto.c (read_cgraph_and_symbols): Call input_offload_tables. Co-Authored-By: Andrey Turetskiy <andrey.turetskiy@intel.com> Co-Authored-By: Bernd Schmidt <bernds@codesourcery.com> Co-Authored-By: Ilya Tocar <ilya.tocar@intel.com> Co-Authored-By: Michael Zolotukhin <michael.v.zolotukhin@intel.com> From-SVN: r217489
This commit is contained in:
Ilya Verbin
Kirill Yukhin
parent
3f341ee716
commit
ec6fe917cd
18 changed files with 267 additions and 2 deletions
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@ -7,6 +7,36 @@
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Andrey Turetskiy <andrey.turetskiy@intel.com>
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Michael Zolotukhin <michael.v.zolotukhin@intel.com>
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* Makefile.in (GTFILES): Add omp-low.h to list of GC files.
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* cgraphunit.c: Include omp-low.h.
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* doc/tm.texi: Regenerate.
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* doc/tm.texi.in (TARGET_RECORD_OFFLOAD_SYMBOL): Document.
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* gengtype.c (open_base_files): Add omp-low.h to ifiles.
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* lto-cgraph.c (output_offload_tables): New function.
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(input_offload_tables): Likewise.
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* lto-section-in.c (lto_section_name): Add "offload_table".
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* lto-section-names.h (OFFLOAD_VAR_TABLE_SECTION_NAME): Define.
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(OFFLOAD_FUNC_TABLE_SECTION_NAME): Likewise.
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* lto-streamer-out.c (lto_output): Call output_offload_tables.
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* lto-streamer.h (lto_section_type): Add LTO_section_offload_table.
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(output_offload_tables, input_offload_tables): Declare.
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* omp-low.c: Include common/common-target.h and lto-section-names.h.
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(offload_funcs, offload_vars): New global <tree, va_gc> vectors.
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(expand_omp_target): Add child_fn into offload_funcs vector.
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(add_decls_addresses_to_decl_constructor): New function.
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(omp_finish_file): Likewise.
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* omp-low.h (omp_finish_file, offload_funcs, offload_vars): Declare.
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* target.def (record_offload_symbol): New DEFHOOK.
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* toplev.c: Include omp-low.h.
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(compile_file): Call omp_finish_file.
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* varpool.c: Include omp-low.h.
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(varpool_node::get_create): Add decl into offload_vars vector.
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2014-11-13 Ilya Verbin <ilya.verbin@intel.com>
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Ilya Tocar <ilya.tocar@intel.com>
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Andrey Turetskiy <andrey.turetskiy@intel.com>
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Bernd Schmidt <bernds@codesourcery.com>
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* cgraph.c: Include context.h.
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(cgraph_node::create): Set node->offloadable and g->have_offload if
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decl have "omp declare target" attribute.
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@ -2320,6 +2320,7 @@ GTFILES = $(CPP_ID_DATA_H) $(srcdir)/input.h $(srcdir)/coretypes.h \
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$(srcdir)/tree-profile.c $(srcdir)/tree-nested.c \
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$(srcdir)/tree-parloops.c \
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$(srcdir)/omp-low.c \
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$(srcdir)/omp-low.h \
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$(srcdir)/targhooks.c $(out_file) $(srcdir)/passes.c $(srcdir)/cgraphunit.c \
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$(srcdir)/cgraphclones.c \
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$(srcdir)/tree-phinodes.c \
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@ -225,6 +225,7 @@ along with GCC; see the file COPYING3. If not see
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#include "dbgcnt.h"
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#include "tree-chkp.h"
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#include "lto-section-names.h"
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#include "omp-low.h"
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/* Queue of cgraph nodes scheduled to be added into cgraph. This is a
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secondary queue used during optimization to accommodate passes that
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@ -11396,6 +11396,12 @@ If defined, this function returns an appropriate alignment in bits for an atomic
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ISO C11 requires atomic compound assignments that may raise floating-point exceptions to raise exceptions corresponding to the arithmetic operation whose result was successfully stored in a compare-and-exchange sequence. This requires code equivalent to calls to @code{feholdexcept}, @code{feclearexcept} and @code{feupdateenv} to be generated at appropriate points in the compare-and-exchange sequence. This hook should set @code{*@var{hold}} to an expression equivalent to the call to @code{feholdexcept}, @code{*@var{clear}} to an expression equivalent to the call to @code{feclearexcept} and @code{*@var{update}} to an expression equivalent to the call to @code{feupdateenv}. The three expressions are @code{NULL_TREE} on entry to the hook and may be left as @code{NULL_TREE} if no code is required in a particular place. The default implementation leaves all three expressions as @code{NULL_TREE}. The @code{__atomic_feraiseexcept} function from @code{libatomic} may be of use as part of the code generated in @code{*@var{update}}.
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@end deftypefn
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@deftypefn {Target Hook} void TARGET_RECORD_OFFLOAD_SYMBOL (tree)
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Used when offloaded functions are seen in the compilation unit and no named
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sections are available. It is called once for each symbol that must be
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recorded in the offload function and variable table.
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@end deftypefn
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@defmac TARGET_SUPPORTS_WIDE_INT
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On older ports, large integers are stored in @code{CONST_DOUBLE} rtl
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@ -8169,6 +8169,8 @@ and the associated definitions of those functions.
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@hook TARGET_ATOMIC_ASSIGN_EXPAND_FENV
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@hook TARGET_RECORD_OFFLOAD_SYMBOL
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@defmac TARGET_SUPPORTS_WIDE_INT
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On older ports, large integers are stored in @code{CONST_DOUBLE} rtl
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@ -1843,7 +1843,7 @@ open_base_files (void)
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"tree-ssa.h", "reload.h", "cpp-id-data.h", "tree-chrec.h",
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"except.h", "output.h", "cfgloop.h", "target.h", "lto-streamer.h",
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"target-globals.h", "ipa-ref.h", "cgraph.h", "ipa-prop.h",
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"ipa-inline.h", "dwarf2out.h", NULL
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"ipa-inline.h", "dwarf2out.h", "omp-low.h", NULL
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};
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const char *const *ifp;
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outf_p gtype_desc_c;
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@ -61,6 +61,7 @@ along with GCC; see the file COPYING3. If not see
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#include "context.h"
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#include "pass_manager.h"
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#include "ipa-utils.h"
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#include "omp-low.h"
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/* True when asm nodes has been output. */
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bool asm_nodes_output = false;
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@ -1068,6 +1069,50 @@ read_string (struct lto_input_block *ib)
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return str;
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}
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/* Output function/variable tables that will allow libgomp to look up offload
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target code.
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OFFLOAD_FUNCS is filled in expand_omp_target, OFFLOAD_VARS is filled in
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varpool_node::get_create. In WHOPR (partitioned) mode during the WPA stage
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both OFFLOAD_FUNCS and OFFLOAD_VARS are filled by input_offload_tables. */
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void
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output_offload_tables (void)
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{
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if (vec_safe_is_empty (offload_funcs) && vec_safe_is_empty (offload_vars))
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return;
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struct lto_simple_output_block *ob
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= lto_create_simple_output_block (LTO_section_offload_table);
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for (unsigned i = 0; i < vec_safe_length (offload_funcs); i++)
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{
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streamer_write_enum (ob->main_stream, LTO_symtab_tags,
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LTO_symtab_last_tag, LTO_symtab_unavail_node);
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lto_output_fn_decl_index (ob->decl_state, ob->main_stream,
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(*offload_funcs)[i]);
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}
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for (unsigned i = 0; i < vec_safe_length (offload_vars); i++)
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{
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streamer_write_enum (ob->main_stream, LTO_symtab_tags,
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LTO_symtab_last_tag, LTO_symtab_variable);
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lto_output_var_decl_index (ob->decl_state, ob->main_stream,
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(*offload_vars)[i]);
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}
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streamer_write_uhwi_stream (ob->main_stream, 0);
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lto_destroy_simple_output_block (ob);
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/* In WHOPR mode during the WPA stage the joint offload tables need to be
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streamed to one partition only. That's why we free offload_funcs and
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offload_vars after the first call of output_offload_tables. */
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if (flag_wpa)
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{
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vec_free (offload_funcs);
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vec_free (offload_vars);
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}
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}
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/* Overwrite the information in NODE based on FILE_DATA, TAG, FLAGS,
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STACK_SIZE, SELF_TIME and SELF_SIZE. This is called either to initialize
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NODE or to replace the values in it, for instance because the first
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@ -1794,6 +1839,55 @@ input_symtab (void)
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}
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}
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/* Input function/variable tables that will allow libgomp to look up offload
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target code, and store them into OFFLOAD_FUNCS and OFFLOAD_VARS. */
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void
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input_offload_tables (void)
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{
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struct lto_file_decl_data **file_data_vec = lto_get_file_decl_data ();
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struct lto_file_decl_data *file_data;
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unsigned int j = 0;
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while ((file_data = file_data_vec[j++]))
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{
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const char *data;
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size_t len;
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struct lto_input_block *ib
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= lto_create_simple_input_block (file_data, LTO_section_offload_table,
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&data, &len);
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if (!ib)
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continue;
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enum LTO_symtab_tags tag
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= streamer_read_enum (ib, LTO_symtab_tags, LTO_symtab_last_tag);
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while (tag)
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{
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if (tag == LTO_symtab_unavail_node)
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{
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int decl_index = streamer_read_uhwi (ib);
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tree fn_decl
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= lto_file_decl_data_get_fn_decl (file_data, decl_index);
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vec_safe_push (offload_funcs, fn_decl);
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}
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else if (tag == LTO_symtab_variable)
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{
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int decl_index = streamer_read_uhwi (ib);
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tree var_decl
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= lto_file_decl_data_get_var_decl (file_data, decl_index);
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vec_safe_push (offload_vars, var_decl);
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}
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else
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fatal_error ("invalid offload table in %s", file_data->file_name);
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tag = streamer_read_enum (ib, LTO_symtab_tags, LTO_symtab_last_tag);
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}
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lto_destroy_simple_input_block (file_data, LTO_section_offload_table,
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ib, data, len);
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}
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}
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/* True when we need optimization summary for NODE. */
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static int
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@ -70,7 +70,8 @@ const char *lto_section_name[LTO_N_SECTION_TYPES] =
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"cgraphopt",
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"inline",
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"ipcp_trans",
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"icf"
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"icf",
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"offload_table"
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};
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@ -35,4 +35,7 @@ extern const char *section_name_prefix;
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#define LTO_SEGMENT_NAME "__GNU_LTO"
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#define OFFLOAD_VAR_TABLE_SECTION_NAME ".gnu.offload_vars"
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#define OFFLOAD_FUNC_TABLE_SECTION_NAME ".gnu.offload_funcs"
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#endif /* GCC_LTO_SECTION_NAMES_H */
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@ -2308,6 +2308,8 @@ lto_output (void)
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statements using the statement UIDs. */
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output_symtab ();
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output_offload_tables ();
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#ifdef ENABLE_CHECKING
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lto_bitmap_free (output);
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#endif
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@ -247,6 +247,7 @@ enum lto_section_type
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LTO_section_inline_summary,
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LTO_section_ipcp_transform,
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LTO_section_ipa_icf,
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LTO_section_offload_table,
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LTO_N_SECTION_TYPES /* Must be last. */
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};
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@ -822,6 +823,8 @@ bool lto_symtab_encoder_encode_initializer_p (lto_symtab_encoder_t,
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varpool_node *);
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void output_symtab (void);
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void input_symtab (void);
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void output_offload_tables (void);
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void input_offload_tables (void);
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bool referenced_from_other_partition_p (struct ipa_ref_list *,
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lto_symtab_encoder_t);
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bool reachable_from_other_partition_p (struct cgraph_node *,
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@ -3,6 +3,13 @@
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Andrey Turetskiy <andrey.turetskiy@intel.com>
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Michael Zolotukhin <michael.v.zolotukhin@intel.com>
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* lto/lto.c (read_cgraph_and_symbols): Call input_offload_tables.
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2014-11-13 Ilya Verbin <ilya.verbin@intel.com>
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Ilya Tocar <ilya.tocar@intel.com>
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Andrey Turetskiy <andrey.turetskiy@intel.com>
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Bernd Schmidt <bernds@codesourcery.com>
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* lto-object.c (lto_obj_add_section): Use section_name_prefix instead of
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LTO_SECTION_NAME_PREFIX.
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* lto-partition.c (lto_promote_cross_file_statics): Call
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@ -3034,6 +3034,8 @@ read_cgraph_and_symbols (unsigned nfiles, const char **fnames)
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/* Read the symtab. */
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input_symtab ();
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input_offload_tables ();
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/* Store resolutions into the symbol table. */
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ld_plugin_symbol_resolution_t *res;
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@ -77,6 +77,7 @@ along with GCC; see the file COPYING3. If not see
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#include "optabs.h"
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#include "cfgloop.h"
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#include "target.h"
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#include "common/common-target.h"
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#include "omp-low.h"
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#include "gimple-low.h"
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#include "tree-cfgcleanup.h"
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@ -87,6 +88,7 @@ along with GCC; see the file COPYING3. If not see
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#include "tree-eh.h"
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#include "cilk.h"
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#include "context.h"
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#include "lto-section-names.h"
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/* Lowering of OpenMP parallel and workshare constructs proceeds in two
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@ -235,6 +237,9 @@ static tree scan_omp_1_op (tree *, int *, void *);
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*handled_ops_p = false; \
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break;
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/* Holds offload tables with decls. */
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vec<tree, va_gc> *offload_funcs, *offload_vars;
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/* Convenience function for calling scan_omp_1_op on tree operands. */
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static inline tree
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@ -8409,6 +8414,9 @@ expand_omp_target (struct omp_region *region)
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DECL_STRUCT_FUNCTION (child_fn)->curr_properties = cfun->curr_properties;
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cgraph_node::add_new_function (child_fn, true);
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/* Add the new function to the offload table. */
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vec_safe_push (offload_funcs, child_fn);
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/* Fix the callgraph edges for child_cfun. Those for cfun will be
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fixed in a following pass. */
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push_cfun (child_cfun);
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@ -12423,4 +12431,91 @@ make_pass_omp_simd_clone (gcc::context *ctxt)
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return new pass_omp_simd_clone (ctxt);
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}
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/* Helper function for omp_finish_file routine. Takes decls from V_DECLS and
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adds their addresses and sizes to constructor-vector V_CTOR. */
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static void
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add_decls_addresses_to_decl_constructor (vec<tree, va_gc> *v_decls,
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vec<constructor_elt, va_gc> *v_ctor)
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{
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unsigned len = vec_safe_length (v_decls);
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for (unsigned i = 0; i < len; i++)
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{
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tree it = (*v_decls)[i];
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bool is_function = TREE_CODE (it) != VAR_DECL;
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CONSTRUCTOR_APPEND_ELT (v_ctor, NULL_TREE, build_fold_addr_expr (it));
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if (!is_function)
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CONSTRUCTOR_APPEND_ELT (v_ctor, NULL_TREE,
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fold_convert (const_ptr_type_node,
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DECL_SIZE_UNIT (it)));
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}
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}
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/* Create new symbols containing (address, size) pairs for global variables,
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marked with "omp declare target" attribute, as well as addresses for the
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functions, which are outlined target regions. */
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void
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omp_finish_file (void)
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{
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unsigned num_funcs = vec_safe_length (offload_funcs);
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unsigned num_vars = vec_safe_length (offload_vars);
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if (num_funcs == 0 && num_vars == 0)
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return;
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if (targetm_common.have_named_sections)
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{
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vec<constructor_elt, va_gc> *v_f, *v_v;
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vec_alloc (v_f, num_funcs);
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vec_alloc (v_v, num_vars * 2);
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add_decls_addresses_to_decl_constructor (offload_funcs, v_f);
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add_decls_addresses_to_decl_constructor (offload_vars, v_v);
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|
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tree vars_decl_type = build_array_type_nelts (pointer_sized_int_node,
|
||||
num_vars * 2);
|
||||
tree funcs_decl_type = build_array_type_nelts (pointer_sized_int_node,
|
||||
num_funcs);
|
||||
TYPE_ALIGN (vars_decl_type) = TYPE_ALIGN (pointer_sized_int_node);
|
||||
TYPE_ALIGN (funcs_decl_type) = TYPE_ALIGN (pointer_sized_int_node);
|
||||
tree ctor_v = build_constructor (vars_decl_type, v_v);
|
||||
tree ctor_f = build_constructor (funcs_decl_type, v_f);
|
||||
TREE_CONSTANT (ctor_v) = TREE_CONSTANT (ctor_f) = 1;
|
||||
TREE_STATIC (ctor_v) = TREE_STATIC (ctor_f) = 1;
|
||||
tree funcs_decl = build_decl (UNKNOWN_LOCATION, VAR_DECL,
|
||||
get_identifier (".offload_func_table"),
|
||||
funcs_decl_type);
|
||||
tree vars_decl = build_decl (UNKNOWN_LOCATION, VAR_DECL,
|
||||
get_identifier (".offload_var_table"),
|
||||
vars_decl_type);
|
||||
TREE_STATIC (funcs_decl) = TREE_STATIC (vars_decl) = 1;
|
||||
/* Do not align tables more than TYPE_ALIGN (pointer_sized_int_node),
|
||||
otherwise a joint table in a binary will contain padding between
|
||||
tables from multiple object files. */
|
||||
DECL_USER_ALIGN (funcs_decl) = DECL_USER_ALIGN (vars_decl) = 1;
|
||||
DECL_ALIGN (funcs_decl) = TYPE_ALIGN (funcs_decl_type);
|
||||
DECL_ALIGN (vars_decl) = TYPE_ALIGN (vars_decl_type);
|
||||
DECL_INITIAL (funcs_decl) = ctor_f;
|
||||
DECL_INITIAL (vars_decl) = ctor_v;
|
||||
set_decl_section_name (funcs_decl, OFFLOAD_FUNC_TABLE_SECTION_NAME);
|
||||
set_decl_section_name (vars_decl, OFFLOAD_VAR_TABLE_SECTION_NAME);
|
||||
|
||||
varpool_node::finalize_decl (vars_decl);
|
||||
varpool_node::finalize_decl (funcs_decl);
|
||||
}
|
||||
else
|
||||
{
|
||||
for (unsigned i = 0; i < num_funcs; i++)
|
||||
{
|
||||
tree it = (*offload_funcs)[i];
|
||||
targetm.record_offload_symbol (it);
|
||||
}
|
||||
for (unsigned i = 0; i < num_vars; i++)
|
||||
{
|
||||
tree it = (*offload_vars)[i];
|
||||
targetm.record_offload_symbol (it);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#include "gt-omp-low.h"
|
||||
|
|
|
|||
|
|
@ -27,5 +27,9 @@ extern void omp_expand_local (basic_block);
|
|||
extern void free_omp_regions (void);
|
||||
extern tree omp_reduction_init (tree, tree);
|
||||
extern bool make_gimple_omp_edges (basic_block, struct omp_region **, int *);
|
||||
extern void omp_finish_file (void);
|
||||
|
||||
extern GTY(()) vec<tree, va_gc> *offload_funcs;
|
||||
extern GTY(()) vec<tree, va_gc> *offload_vars;
|
||||
|
||||
#endif /* GCC_OMP_LOW_H */
|
||||
|
|
|
|||
|
|
@ -1779,6 +1779,14 @@ HOOK_VECTOR_END (vectorize)
|
|||
#undef HOOK_PREFIX
|
||||
#define HOOK_PREFIX "TARGET_"
|
||||
|
||||
DEFHOOK
|
||||
(record_offload_symbol,
|
||||
"Used when offloaded functions are seen in the compilation unit and no named\n\
|
||||
sections are available. It is called once for each symbol that must be\n\
|
||||
recorded in the offload function and variable table.",
|
||||
void, (tree),
|
||||
hook_void_tree)
|
||||
|
||||
/* Allow target specific overriding of option settings after options have
|
||||
been changed by an attribute or pragma or when it is reset at the
|
||||
end of the code affected by an attribute or pragma. */
|
||||
|
|
|
|||
|
|
@ -98,6 +98,7 @@ along with GCC; see the file COPYING3. If not see
|
|||
#include "insn-codes.h"
|
||||
#include "optabs.h"
|
||||
#include "tree-chkp.h"
|
||||
#include "omp-low.h"
|
||||
|
||||
#if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO)
|
||||
#include "dbxout.h"
|
||||
|
|
@ -601,6 +602,8 @@ compile_file (void)
|
|||
if (flag_check_pointer_bounds)
|
||||
chkp_finish_file ();
|
||||
|
||||
omp_finish_file ();
|
||||
|
||||
output_shared_constant_pool ();
|
||||
output_object_blocks ();
|
||||
finish_tm_clone_pairs ();
|
||||
|
|
|
|||
|
|
@ -50,6 +50,7 @@ along with GCC; see the file COPYING3. If not see
|
|||
#include "gimple.h"
|
||||
#include "lto-streamer.h"
|
||||
#include "context.h"
|
||||
#include "omp-low.h"
|
||||
|
||||
const char * const tls_model_names[]={"none", "tls-emulated", "tls-real",
|
||||
"tls-global-dynamic", "tls-local-dynamic",
|
||||
|
|
@ -171,6 +172,8 @@ varpool_node::get_create (tree decl)
|
|||
{
|
||||
node->offloadable = 1;
|
||||
g->have_offload = true;
|
||||
if (!in_lto_p)
|
||||
vec_safe_push (offload_vars, decl);
|
||||
}
|
||||
|
||||
node->register_symbol ();
|
||||
|
|
|
|||
Loading…
Add table
Reference in a new issue