1. 18 Nov, 2017 5 commits
    • PR 83036 Make NEXTREC specifier for INQUIRE work for large record numbers · a7037861
      This is accomplished by making the NEXTREC specifier be a 8 byte
      integer where supported.
      
      I wasn't able to come up with a testcase that does not create a large
      file that could be added to the testsuite, but here's one which
      creates a 2 GB file:
      
      program nextrec
        implicit none
        integer(8) :: ii, n
        open(10, file="foo.dat", recl=1, access="direct", form="unformatted", &
             status="replace")
        do ii = 1, huge(1) + 2_8
           write(10, rec=ii) 'a'
        end do
        inquire(10, nextrec=n)
        if (n /= huge(1) + 3_8) then
           call abort()
        end if
        close(10, status="delete")
      end program nextrec
      
      Regtested on x86_64-pc-linux-gnu.
      
      gcc/fortran/ChangeLog:
      
      2017-11-18  Janne Blomqvist  <jb@gcc.gnu.org>
      
      	PR fortran/83036
      	* ioparm.def (IOPARM): Make nextrec a pintio.
      
      libgfortran/ChangeLog:
      
      2017-11-18  Janne Blomqvist  <jb@gcc.gnu.org>
      
      	PR fortran/83036
      	* io/io.h: Make nextrec a GFC_IO_INT*.
      ---
       gcc/fortran/ioparm.def | 2 +-
       libgfortran/io/io.h    | 3 +--
       2 files changed, 2 insertions(+), 3 deletions(-)
      
      diff --git a/gcc/fortran/ioparm.def b/gcc/fortran/ioparm.def
      index 5fc04bc..59cc7cd 100644
      --- a/gcc/fortran/ioparm.def
      +++ b/gcc/fortran/ioparm.def
      @@ -62,7 +62,7 @@ IOPARM (inquire, exist,		1 << 7,  pint4)
       IOPARM (inquire, opened,	1 << 8,  pint4)
       IOPARM (inquire, number,	1 << 9,  pint4)
       IOPARM (inquire, named,		1 << 10, pint4)
      -IOPARM (inquire, nextrec,	1 << 11, pint4)
      +IOPARM (inquire, nextrec,	1 << 11, pintio)
       IOPARM (inquire, recl_out,	1 << 12, pintio)
       IOPARM (inquire, strm_pos_out,	1 << 13, pintio)
       IOPARM (inquire, file,		1 << 14, char1)
      diff --git a/libgfortran/io/io.h b/libgfortran/io/io.h
      index 3330bce..d29b112 100644
      --- a/libgfortran/io/io.h
      +++ b/libgfortran/io/io.h
      @@ -388,8 +388,7 @@ typedef struct
       {
         st_parameter_common common;
         GFC_INTEGER_4 *exist, *opened, *number, *named;
      -  GFC_INTEGER_4 *nextrec;
      -  GFC_IO_INT  *recl_out, *strm_pos_out;
      +  GFC_IO_INT *nextrec, *recl_out, *strm_pos_out;
         CHARACTER1 (file);
         CHARACTER2 (access);
         CHARACTER1 (form);
      -- 
      2.7.4
      
      From-SVN: r254916
      Janne Blomqvist committed
    • PR 44292 Enable large record lengths in OPEN and INQUIRE statements · 831cf09d
      This is a straightforward change that we can do now that the ABI has
      been bumped (again!).
      
      Regtested on x86_64-pc-linux-gnu.
      
      gcc/fortran/ChangeLog:
      
      2017-11-18  Janne Blomqvist  <jb@gcc.gnu.org>
      
      	PR fortran/44292
      	* ioparm.def (IOPARM): Make recl_in intio, and recl_out pintio.
      
      libgfortran/ChangeLog:
      
      2017-11-18  Janne Blomqvist  <jb@gcc.gnu.org>
      
      	PR fortran/44292
      	* io/io.h: Make recl_in a GC_IO_INT and recl_out a type
      	GFC_IO_INT*.
      
      gcc/testsuite/ChangeLog:
      
      2017-11-18  Janne Blomqvist  <jb@gcc.gnu.org>
      
      	PR fortran/44292
      	* gfortran.dg/large_recl.f90: New test.
      
      From-SVN: r254915
      Janne Blomqvist committed
    • re PR fortran/83012 (Simply contiguous pointer function not recognized as contiguous) · a814e35b
      2017-11-18  Thomas Koenig  <tkoenig@gcc.gnu.org>
      
      	PR fortran/83012
      	* expr.c (gfc_is_simply_contiguous): If a function call through a
      	class variable is done through a reference, check the function's
      	interface.
      
      2017-11-18  Thomas Koenig  <tkoenig@gcc.gnu.org>
      
      	PR fortran/83012
      	* gfortran.dg/contiguous_5.f90: New test.
      
      From-SVN: r254914
      Thomas Koenig committed
    • hash-set.h (hash_set::empty): New. · cde30fe0
      	* hash-set.h (hash_set::empty): New.
      	* tree-ssa-threadbackward.h: Delete.
      	* tree-ssa-threadbackward.c (class thread_jumps): New.
      	Move max_threaded_paths into class.
      	(fsm_find_thread_path): Remove arguments that are now in class.
      	(profitable_jump_thread_path): Rename to...
      	(thread_jumps::profitable_jump_thread_path): ...this.
      	(convert_and_register_jump_thread_path): Rename to...
      	(thread_jumps::convert_and_register_current_path): ...this.
      	(check_subpath_and_update_thread_path): Rename to...
      	(thread_jumps::check_subpath_and_update_thread_path): ...this.
      	(register_jump_thread_path_if_profitable): Rename to...
      	(thread_jumps::register_jump_thread_path_if_profitable): ...this.
      	(handle_phi): Rename to...
      	(thread_jumps::handle_phi): ...this.
      	(handle_assignment): Rename to...
      	(thread_jumps::handle_assignment): ...this.
      	(fsm_find_control_statement_thread_paths): Rename to...
      	(thread_jumps::fsm_find_control_statement_thread_paths): ...this.
      	(find_jump_threads_backwards): Rename to...
      	(thread_jumps::find_jump_threads_backwards): ...this.
      	Initialize path local data.
      	(pass_thread_jumps::execute): Call find_jump_threads_backwards
      	from within thread_jumps class.
      	(pass_early_thread_jumps::execute): Same.
      
      From-SVN: r254913
      Aldy Hernandez committed
    • Daily bump. · f32e0e16
      From-SVN: r254912
      GCC Administrator committed
  2. 17 Nov, 2017 35 commits
    • Enable building libitm with Intel CET · c51081fc
      libitm/
      	* Makefile.in: Regenerate.
      	* acinclude.m4: Add enable.m4 and cet.m4.
      	* config/x86/sjlj.S: Include cet.h.
      	(_ITM_beginTransaction): Add _CET_ENDBR.
      	Save Shadow Stack pointer.
      	(GTM_longjmp): Add _CET_ENDBR. Restore Shadow Stack pointer.
      	* config/x86/target.h (struct gtm_jmpbuf):
      	Add new field for Shadow Stack pointer.
      	* configure: Regenerate.
      	* configure.ac: Set CET_FLAGS. Update XCFLAGS.
      	* configure.ac: Update libtool_VERSION for x86.
      	* testsuite/Makefile.in: Regenerate.
      
      From-SVN: r254908
      Igor Tsimbalist committed
    • Add extra field to gtm_jmpbuf on x86 only · cc03e55b
      Expand the gtm_jmpbuf structure by one word field to add
      Intel CET support further. The code in sjlj.S already
      allocates more space on the stack then gtm_jmpbuf needs.
      Use this extra space to absorb the new field.
      
      The structure is allocated on the stack in such a way
      that eip/rsp field is overlapped with return address on
      the stack. Locate the new field right before eip/rsp so
      code that accesses buffer fields relative to address of
      gtm_jmpbuf has its offsets unchanged.
      
      	* libitm/config/x86/target.h: Add new field (ssp).
      	* libitm/config/x86/sjlj.S: Change offsets.
      
      From-SVN: r254907
      Igor Tsimbalist committed
    • fmls.c: New test. · 7cac54fb
      2017-11-17  Steve Ellcey  <sellcey@cavium.com>
      
      	* gcc.target/aarch64/fmls.c: New test.
      
      From-SVN: r254906
      Steve Ellcey committed
    • aarch64-simd.md (fnma<mode>4): Move neg operator to canonical location. · a7fef189
      2017-11-17  Steve Ellcey  <sellcey@cavium.com>
      
      	* config/aarch64/aarch64-simd.md (fnma<mode>4): Move neg operator
      	to canonical location.
      
      From-SVN: r254905
      Steve Ellcey committed
    • Enable building libobjc with Intel CET · 7b7168cf
      libobjc/
      	* Makefile.in: Regenerate.
      	* aclocal.m4: Likeiwse.
      	* configure: Likewise.
      	* configure.ac: Set CET_FLAGS. Update XCFLAGS.
      
      From-SVN: r254904
      Igor Tsimbalist committed
    • pr81356.c: New test. · 667b43c1
      2017-11-17  Steve Ellcey  <sellcey@cavium.com>
      
      	* gcc.target/aarch64/pr81356.c: New test.
      
      From-SVN: r254903
      Steve Ellcey committed
    • Enable building libgfortran with Intel CET · 26724ef9
      libgfortran/
      	* acinclude.m4: Add enable.m4, cet.m4.
      	* Makefile.in: Regenerate.
      	* configure: Likewise.
      	* configure.ac: Set CET_FLAGS. Update AM_FCFLAGS,
      	AM_CFLAGS, CFLAGS.
      
      From-SVN: r254902
      Igor Tsimbalist committed
    • re PR target/81356 (__builtin_strcpy is not good for copying an empty string on aarch64) · 04959406
      2017-11-17  Steve Ellcey  <sellcey@cavium.com>
      
      	PR target/81356
      	* config/aarch64/aarch64.c (aarch64_use_by_pieces_infrastructure_p):
      	Remove.
      	(TARGET_USE_BY_PIECES_INFRASTRUCTURE_P): Remove define.
      
      From-SVN: r254901
      Steve Ellcey committed
    • Enable building libmpx with Intel CET · abccc074
      libmpx/
      	* Makefile.in: Regenerate.
      	* acinclude.m4: Add enable.m4 and cet.m4.
      	* configure: Regenerate.
      	* configure.ac: Set CET_FLAGS. Update XCFLAGS.
      	* mpxrt/Makefile.am: Update libmpx_la_CFLAGS.
      	* mpxrt/Makefile.in: Regenerate.
      	* mpxwrap/Makefile.am: Add AM_CFLAGS. Update
      	libmpxwrappers_la_CFLAGS.
      	* mpxwrap/Makefile.in: Regenerate.
      
      From-SVN: r254900
      Igor Tsimbalist committed
    • Enable building libquadmath with Intel CET · fda26abe
      libquadmath/
      	* Makefile.am: Update AM_CFLAGS.
      	* Makefile.in: Regenerate:
      	* acinclude.m4: Add enable.m4 and cet.m4.
      	* configure: Regenerate.
      	* configure.ac: Set CET_FLAGS. Update XCFLAGS.
      
      From-SVN: r254899
      Igor Tsimbalist committed
    • Enable building libssp with Intel CET · ff035ef6
      libssp/
      	* Makefile.am: Update AM_CFLAGS, update
      	libssp_nonshared_la_CFLAGS.
      	* Makefile.in: Regenerate.
      	* configure: Likewise.
      	* aclocal.m4: Likewise.
      	* configure.ac: Set CET_FLAGS. Update XCFLAGS.
      
      From-SVN: r254898
      Igor Tsimbalist committed
    • Enable building libvtv with Intel CET · 8e2fc055
      libvtv/
      	* acinclude.m4: Add enable.m4 and cet.m4.
      	* Makefile.in: Regenerate.
      	* testsuite/Makefile.in: Likewise.
      	* configure: Likewise.
      	* configure.ac: Set CET_FLAGS. Update XCFLAGS.
      	* testsuite/libvtv.cc/vtv.exp: Add scanlang.exp.
      
      From-SVN: r254897
      Igor Tsimbalist committed
    • Enable building libsanitizer with Intel CET · 9069eb28
      libsanitizer/
      	* acinclude.m4: Add enable.m4 and cet.m4.
      	* Makefile.in: Regenerate.
      	* asan/Makefile.am: Update AM_CXXFLAGS.
      	* asan/Makefile.in: Regenerate.
      	* configure: Likewise.
      	* configure.ac: Set CET_FLAGS. Update EXTRA_CFLAGS,
      	EXTRA_CXXFLAGS, EXTRA_ASFLAGS.
      	* interception/Makefile.am: Update AM_CXXFLAGS.
      	* interception/Makefile.in: Regenerate.
      	* libbacktrace/Makefile.am: Update AM_CFLAGS, AM_CXXFLAGS.
      	* libbacktrace/Makefile.in: Regenerate.
      	* lsan/Makefile.am: Update AM_CXXFLAGS.
      	* lsan/Makefile.in: Regenerate.
      	* sanitizer_common/Makefile.am: Update AM_CXXFLAGS,
      	AM_CCASFLAGS.
      	* sanitizer_common/sanitizer_linux_x86_64.S: Include cet.h.
      	Add _CET_ENDBR macro.
      	* sanitizer_common/Makefile.in: Regenerate.
      	* tsan/Makefile.am: Update AM_CXXFLAGS.
      	* tsan/Makefile.in: Regenerate.
      	* tsan/tsan_rtl_amd64.S Include cet.h. Add _CET_ENDBR macro.
      	* ubsan/Makefile.am: Update AM_CXXFLAGS.
      	* ubsan/Makefile.in: Regenerate.
      
      From-SVN: r254896
      Igor Tsimbalist committed
    • Enable building libstdc++-v3 with Intel CET · 36101de9
      libstdc++-v3/
      	* acinclude.m4: Add cet.m4.
      	* configure.ac: Set CET_FLAGS. Update EXTRA_CFLAGS,
      	EXTRA_CXX_FLAGS.
      	* libsupc++/Makefile.am: Use Add EXTRA_CFLAGS.
      	* Makefile.in: Regenerate.
      	* configure: Likewise.
      	* doc/Makefile.in: Likewise.
      	* include/Makefile.in: Likewise.
      	* libsupc++/Makefile.in: Likewise.
      	* po/Makefile.in: Likewise.
      	* python/Makefile.in: Likewise.
      	* src/Makefile.in: Likewise.
      	* src/c++11/Makefile.in: Likewise.
      	* src/c++98/Makefile.in: Likewise.
      	* src/filesystem/Makefile.in: Likewise.
      	* testsuite/Makefile.in: Likewise.
      
      From-SVN: r254895
      Igor Tsimbalist committed
    • Enable building libgomp with Intel CET · efe33ced
      libgomp/
      	* configure.ac: Set CET_FLAGS, update XCFLAGS and FCFLAGS.
      	* acinclude.m4: Add cet.m4.
      	* configure: Regenerate.
      	* Makefile.in: Likewise.
      	* testsuite/Makefile.in: Likewise.
      
      From-SVN: r254894
      Igor Tsimbalist committed
    • Enable building libatomic with Intel CET · efc643e9
      libatomic/
      	* configure.ac: Set CET_FLAGS, update XCFLAGS.
      	* acinclude.m4: Add cet.m4 and enable.m4.
      	* configure: Regenerate.
      	* Makefile.in: Likewise.
      	* testsuite/Makefile.in: Likewise.
      
      From-SVN: r254893
      Igor Tsimbalist committed
    • Enable building libbacktrace with Intel CET · 44685d37
      libbacktrace/
      	* configure.ac: Add CET_FLAGS to EXTRA_FLAGS.
      	* aclocal.m4: Regenerate.
      	* Makefile.in: Likewise.
      	* configure: Likewise.
      
      From-SVN: r254892
      Igor Tsimbalist committed
    • Use rcrt1.o%s/grcrt1.o%s to relocate static PIE · 5dbc0061
      crt1.o is used to create dynamic and non-PIE static executables.  Static
      PIE needs to link with rcrt1.o, instead of crt1.o, which is also used by
      musl libc and OpenBSD:
      
      https://gcc.gnu.org/ml/gcc/2015-06/msg00008.html
      
      to relocate static PIE at run-time.  When -pg is used with -static-pie,
      grcrt1.o should be used.
      
      	* config/gnu-user.h (GNU_USER_TARGET_STARTFILE_SPEC): Use
      	rcrt1.o%s/grcrt1.o%s for -static-pie.
      
      From-SVN: r254890
      H.J. Lu committed
    • i386.c (ix86_multiplication_cost, [...]): Break out from ... · 274c2d3f
      
      	* i386.c (ix86_multiplication_cost, ix86_division_cost,
      	ix86_shift_rotate_cost): Break out from ...
      	(ix86_rtx_costs): ... here.
      	(ix86_add_stmt_cost): Use rtx cost machinery to compute cost of
      	vector operations.
      
      	* gcc.target/i386/xop-imul64-vector.c: Disable vectorizer costmodel.
      
      From-SVN: r254889
      Jan Hubicka committed
    • predict.c (determine_unlikely_bbs): Set cgraph node count to 0 when entry block… · 650fe732
      predict.c (determine_unlikely_bbs): Set cgraph node count to 0 when entry block was promoted unlikely.
      
      
      	* predict.c (determine_unlikely_bbs): Set cgraph node count to 0
      	when entry block was promoted unlikely.
      	(estimate_bb_frequencies): Increase frequency scale.
      	* profile-count.h (profile_count): Export precision info.
      	* gcc.dg/tree-ssa/dump-2.c: Fixup template for profile precision
      	changes.
      	* gcc.dg/tree-ssa/pr77445-2.c: Fixup template for profile precision
      	changes.
      
      From-SVN: r254888
      Jan Hubicka committed
    • tree-tailcall.c (eliminate_tail_call): Be more careful about not disturbin profile of entry block. · db16c184
      
      	* tree-tailcall.c (eliminate_tail_call): Be more careful about not
      	disturbin profile of entry block.
      
      From-SVN: r254887
      Jan Hubicka committed
    • ipa-fnsummary.c (estimate_node_size_and_time): Be more tolerant for roundoff errors. · 3860f31d
      	* ipa-fnsummary.c (estimate_node_size_and_time): Be more tolerant for
      	roundoff errors.
      
      From-SVN: r254886
      Jan Hubicka committed
    • ipa-cp.c (update_profiling_info): Handle conversion to local profile. · 35cd23eb
      
      	* ipa-cp.c (update_profiling_info): Handle conversion to local
      	profile.
      	* tree-cfg.c (execute_fixup_cfg): Do fixup same way as inliner does.
      
      From-SVN: r254885
      Jan Hubicka committed
    • gimple-ssa-evrp.c (class evrp_range_analyzer): New class extracted from evrp_dom_walker class. · 6566b0fb
      	* gimple-ssa-evrp.c (class evrp_range_analyzer): New class extracted
      	from evrp_dom_walker class.  Various methods moved into new class.
      	(evrp_range_analyzer::evrp_range_analyzer): Constructor for new class.
      	(evrp_range_analyzer::enter): New method.
      	(evrp_range_analyzer::leave): New method.
      	(evrp_dom_walker): Remove delegators no longer needed by this class.
      	Replace vr_values data member with evrp_range_analyzer
      
      From-SVN: r254884
      Jeff Law committed
    • gimple-ssa-evrp.c (evrp_dom_walker::record_ranges_from_phis): New method… · 0dee5a2a
      gimple-ssa-evrp.c (evrp_dom_walker::record_ranges_from_phis): New method extracted from evrp_dom_walker::before_dom_children.
      
      	* gimple-ssa-evrp.c (evrp_dom_walker::record_ranges_from_phis): New
      	method extracted from evrp_dom_walker::before_dom_children.
      	(evrp_dom_walker::record_ranges_from_stmt): Likewise.
      	(evrp_dom_walker::record_ranges_from_incoming_edge): Likewise.
      
      From-SVN: r254883
      Jeff Law committed
    • gimple-ssa-evrp.c (evrp_dom_walker): Add cleanup method. · 271eeb18
      	* gimple-ssa-evrp.c (evrp_dom_walker): Add cleanup method.
      	Add private copy constructor and move assignment operators.
      	Privatize methods and class data where trivially possible.
      	(evrp_dom_walker::cleanup): New function, extracted from
      	execute_early_vrp.  Simplify access to class data.
      
      From-SVN: r254882
      Jeff Law committed
    • [PR c++/82836] Fixe testcase · 00fbd2dd
      https://gcc.gnu.org/ml/gcc-patches/2017-11/msg01515.html
      	* g++.dg/pr82836.C: Fix for c++17.
      
      From-SVN: r254881
      Nathan Sidwell committed
    • vr-values.h (get_output_for_vrp): Prototype. · f432e4fc
      	* vr-values.h (get_output_for_vrp): Prototype.
      	* vr-values.c (get_output_for_vrp): New function extracted from
      	vrp_visit_assignment_or_call and extract_range_from_stmt.
      	(vrp_visit_assignment_or_call): Use get_output_for_vrp.  Simplify.
      
      From-SVN: r254880
      Jeff Law committed
    • [AArch64] Adjust tuning parameters for Falkor · 4f2a94e6
      Disabling software prefetching and switching the autoprefetcher to weak improves
      CPU2017 rate and speed benchmarks for both int and fp sets on Falkor.
      
      SPECrate 2017 fp is up 0.38%
      SPECspeed 2017 fp is up 0.54%
      SPECrate 2017 int is up 3.02%
      SPECspeed 2017 int is up 3.16%
      
      There are only a couple individual regressions. The biggest one being about 4%
      in parest.
      
      For SPEC2006, we've noticed the following:
      
      SPECint is up 0.91%
      SPECfp is stable
      
      In the case of SPEC2006 we noticed both a big regression in mcf (about 20%)
      and a big improvement for hmmer (about 40%).
      
      Since the overall result is positive, we would like to make these new tuning
      settings the default for Falkor.
      
      We may revisit the software prefetcher setting in the future, in case we
      can adjust it enough so it provides us a good balance between improvements and
      regressions (mcf). But for now it is best if it stays off.
      
      2017-11-17  Luis Machado  <luis.machado@linaro.org>
      
      	gcc/
      	* config/aarch64/aarch64.c
      	(qdf24xx_prefetch_tune) <default_opt_level>: Set to -1.
      	(qdf24xx_tunings) <autoprefetcher_model>: Set to
      	tune_params::AUTOPREFETCHER_WEAK.
      
      From-SVN: r254879
      Luis Machado committed
    • re PR target/82641 (Unable to enable crc32 for a certain function with target… · ec132ef2
      re PR target/82641 (Unable to enable crc32 for a certain function with target attribute on ARM (aarch32))
      
      2017-11-17  Tamar Christina  <tamar.christina@arm.com>
      
      	PR target/82641
      	* config/arm/arm.c (arm_valid_target_attribute_rec):
      	Parse "arch=" and "+<ext>".
      	(arm_valid_target_attribute_tree): Re-init global options.
      	(arm_option_override): Make non-static.
      	(arm_options_perform_arch_sanity_checks): Make errors fatal.
      	* gcc/config/arm/arm-c.c (__ARM_FEATURE_CMSE): Support undef.
      	(__ARM_FEATURE_CRC32): Support undef.
      	* config/arm/arm_acle.h (__ARM_FEATURE_CRC32): Replace with pragma.
      	* doc/extend.texi (ARM Function Attributes): Add pragma and target.
      
      gcc/testsuite/
      2017-11-17  Tamar Christina  <tamar.christina@arm.com>
      
      	PR target/82641
      	* gcc.target/arm/pragma_arch_attribute.c: New.
      
      From-SVN: r254878
      Tamar Christina committed
    • gdbinit.in: add "break-on-diagnostic" command · 6e72eb34
      gcc/ChangeLog:
      	* gdbinit.in (break-on-diagnostic): New command.
      
      From-SVN: r254877
      David Malcolm committed
    • Add Intel CET support for EH in libgcc. · 6a10fff4
      Control-flow Enforcement Technology (CET), published by Intel,
      introduces the Shadow Stack feature, which ensures a return from a
      function is done to exactly the same location from where the function
      was called. When EH is present the control-flow transfer may skip some
      stack frames and the shadow stack has to be adjusted not to signal a
      violation of a control-flow transfer. It's done by counting a number
      of skiping frames and adjasting shadow stack pointer by this number.
      
      Having new semantic of the 'ret' instruction if CET is supported in HW
      the 'ret' instruction cannot be generated in ix86_expand_epilogue when
      we are returning after EH is processed. Added a code in
      ix86_expand_epilogue to adjust Shadow Stack pointer and to generate an
      indirect jump instead of 'ret'. As sp register is used during this
      adjustment thus the argument in pro_epilogue_adjust_stack is changed
      to update cfa_reg based on whether control-flow instrumentation is set.
      Without updating the cfa_reg field there is an assert later in dwarf2
      pass related to mismatch the stack register and cfa_reg value.
      
      gcc/
      	* config/i386/i386.c (ix86_expand_epilogue): Change simple
      	return to indirect jump for EH return if control-flow protection
      	is enabled. Change explicit 'false' argument in
      	pro_epilogue_adjust_stack with a value of flag_cf_protection.
      	* config/i386/i386.md (simple_return_indirect_internal): Remove
      	SImode restriction to support 64-bit.
      
      libgcc/
      	* config/i386/linux-unwind.h: Include
      	config/i386/shadow-stack-unwind.h.
      	* config/i386/shadow-stack-unwind.h: New file.
      	* unwind-dw2.c: (uw_install_context): Add a frame parameter and
      	pass it to _Unwind_Frames_Extra.
      	* unwind-generic.h (_Unwind_Frames_Extra): New.
      	* unwind.inc (_Unwind_RaiseException_Phase2): Add frames_p
      	parameter. Add local variable frames to count number of frames.
      	(_Unwind_ForcedUnwind_Phase2): Likewise.
      	(_Unwind_RaiseException): Add local variable frames to count
      	number of frames, pass it to _Unwind_RaiseException_Phase2 and
      	uw_install_context.
      	(_Unwind_ForcedUnwind): Likewise.
      	(_Unwind_Resume): Likewise.
      	(_Unwind_Resume_or_Rethrow): Likewise.
      
      From-SVN: r254876
      Igor Tsimbalist committed
    • combine: Add added_notes_insn · f1b7bc16
      This patch makes combine reconsider insns it added notes to.  This
      matters for example if the note is a REG_DEAD; without the note the
      setter of the register has to be kept around in the result of
      combinations, so it cannot be a 2->1 combination, and the cost of
      the result is higher than without that extra set, so try_combine may
      refuse the combination with the set, but allow it without the set.
      
      This fixes a regression for powerpc: pr69946.c has started to fail
      after the bitfield expansion changes.  GCC used to generate
      
              lwz 3,0(9)
              rlwinm 3,3,12,20,23
              ori 3,3,0x11
              rotldi 3,3,52
              bl bar
      
      but now it does
      
              lwz 3,0(9)
              rldicr 3,3,32,3
              srdi 3,3,48
              ori 3,3,0x110
              sldi 3,3,48
              bl bar
      
      (an instruction too many).  After this patch it is
      
              lwz 3,0(9)
              rlwinm 3,3,16,16,19
              ori 3,3,0x110
              sldi 3,3,48
              bl bar
      
      (the testcase still does not pass, it looks for very specific insns).
      
      
      	* combine.c (added_notes_insn): New.
      	(try_combine): Handle added_notes_insn like added_links_insn.
      	Rewrite return value code.
      	(distribute_notes): Set added_notes_insn to the earliest insn we added
      	a note to.
      
      From-SVN: r254875
      Segher Boessenkool committed
    • combine: Don't split insns if half is unused (PR82621) · 58b46683
      If we have a PARALLEL of two SETs, and one half is unused, we currently
      happily split that into two instructions (although the unused one is
      useless).  Worse, as PR82621 shows, combine will happily merge this
      insn into I3 even if some intervening insn sets the same register
      again, which is wrong.
      
      This fixes it by not splitting PARALLELs with REG_UNUSED notes.  It
      all is handled fine by combine in that case: just the "single set
      that is unused" case isn't handled properly.
      
      This also results in better code: combine will now actually throw
      away the unused SET.  (It still won't do that in an I3).
      
      
      	PR rtl-optimization/82621
      	* combine.c (try_combine): Do not split PARALLELs of two SETs if the
      	dest of one of those SETs is unused.
      
      From-SVN: r254874
      Segher Boessenkool committed