This is my attempt at reviving the old patch
https://gcc.gnu.org/pipermail/gcc-patches/2019-January/514632.html
I have followed on Kyrill's comment upstream on the link above and I
am using the recommended option iii that he mentioned.
"1) Adjust the copy_limit to 256 bits after checking
AARCH64_EXTRA_TUNE_NO_LDP_STP_QREGS in the tuning.
2) Adjust aarch64_copy_one_block_and_progress_pointers to handle
256-bit moves. by iii:
iii) Emit explicit V4SI (or any other 128-bit vector mode) pairs
ldp/stps. This wouldn't need any adjustments to MD patterns,
but would make aarch64_copy_one_block_and_progress_pointers
more complex as it would now have two paths, where one
handles two adjacent memory addresses in one calls."
gcc/ChangeLog:
* config/aarch64/aarch64.c (aarch64_gen_store_pair): Add case
for E_V4SImode.
(aarch64_gen_load_pair): Likewise.
(aarch64_copy_one_block_and_progress_pointers): Handle 256 bit copy.
(aarch64_expand_cpymem): Expand copy_limit to 256bits where
appropriate.
gcc/testsuite/ChangeLog:
* gcc.target/aarch64/cpymem-q-reg_1.c: New test.
* gcc.target/aarch64/large_struct_copy_2.c: Update for ldp q regs.
With the pr96628-part1.f90 source and -ftree-slp-vectorize, we run into an
ICE due to the fact that V2DI mode is not handled in nvptx_gen_shuffle.
Fix this by adding handling of V2DI as well as V2SI mode in
nvptx_gen_shuffle.
Build and reg-tested on x86_64 with nvptx accelerator.
gcc/ChangeLog:
PR target/96428
* config/nvptx/nvptx.c (nvptx_gen_shuffle): Handle V2SI/V2DI.
libgomp/ChangeLog:
PR target/96428
* testsuite/libgomp.oacc-fortran/pr96628-part1.f90: New test.
* testsuite/libgomp.oacc-fortran/pr96628-part2.f90: New test.
.VEC_CONVERT is a const internal call, so normally if the lhs is not used,
we'd DCE it far before getting to veclower, but with -O0 (or perhaps
-fno-tree-dce and some other -fno-* options) it can happen.
But as the internal fn needs the lhs to know the type to which the
conversion is done (and I think that is a reasonable representation, having
some magic another argument and having to create constants with that type
looks overkill to me), we just should DCE those calls ourselves.
During veclower, we can't really remove insns, as the callers would be
upset, so this just replaces it with a GIMPLE_NOP.
2020-08-04 Jakub Jelinek <jakub@redhat.com>
PR middle-end/96426
* tree-vect-generic.c (expand_vector_conversion): Replace .VEC_CONVERT
call with GIMPLE_NOP if there is no lhs.
* gcc.c-torture/compile/pr96426.c: New test.
In debug stmts, we are less strict about what is and what is not accepted
there, so this patch just punts on optimization of a debug stmt rather than
ICEing.
2020-08-04 Jakub Jelinek <jakub@redhat.com>
PR debug/96354
* gimple-fold.c (maybe_canonicalize_mem_ref_addr): Add IS_DEBUG
argument. Return false instead of gcc_unreachable if it is true and
get_addr_base_and_unit_offset returns NULL.
(fold_stmt_1) <case GIMPLE_DEBUG>: Adjust caller.
* g++.dg/opt/pr96354.C: New test.
2020-08-04 Jakub Jelinek <jakub@redhat.com>
* omp-expand.c (expand_omp_for_init_counts): For triangular loops
compute number of iterations at runtime more efficiently.
(expand_omp_for_init_vars): Adjust immediate dominators.
(extract_omp_for_update_vars): Likewise.
gcc/ChangeLog:
* vr-values.c (test_for_singularity): Use irange API.
(simplify_using_ranges::simplify_cond_using_ranges_1): Do not
special case VR_RANGE.
Anti ranges of ~[MIN,X] are automatically canonicalized to [X+1,MAX],
at creation time. There is no need to handle them specially.
Tested by adding a gcc_unreachable and bootstrapping/testing.
gcc/ChangeLog:
* builtins.c (determine_block_size): Remove ad-hoc range canonicalization.
v5 update as comments:
1. Move const_rhs out of loop;
2. Iterate from int size for read_mode.
This patch could optimize(works for char/short/int/void*):
6: r119:TI=[r118:DI+0x10]
7: [r118:DI]=r119:TI
8: r121:DI=[r118:DI+0x8]
=>
6: r119:TI=[r118:DI+0x10]
16: r122:DI=r119:TI#8
Final ASM will be as below without partial load after full store(stxv+ld):
ld 10,16(3)
mr 9,3
ld 3,24(3)
std 10,0(9)
std 3,8(9)
blr
It could achieve ~25% performance improvement for typical cases on
Power9. Bootstrap and regression tested on Power9-LE.
For AArch64, one ldr is replaced by mov with this patch:
ldp x2, x3, [x0, 16]
stp x2, x3, [x0]
ldr x0, [x0, 8]
=>
mov x1, x0
ldp x2, x0, [x0, 16]
stp x2, x0, [x1]
gcc/ChangeLog:
2020-08-04 Xionghu Luo <luoxhu@linux.ibm.com>
PR rtl-optimization/71309
* dse.c (find_shift_sequence): Use subreg of shifted from high part
register to avoid loading from address.
gcc/testsuite/ChangeLog:
2020-08-04 Xionghu Luo <luoxhu@linux.ibm.com>
PR rtl-optimization/71309
* gcc.target/powerpc/pr71309.c: New test.
This accomodates increased space required by use of the xsavec
instruction in the dynamic linker trampoline.
libgcc/ChangeLog:
* config/i386/morestack.S (BACKOFF) [x86_64]: Add 2048 bytes.
It should be skipped then.
2020-08-03 Segher Boessenkool <segher@kernel.crashing.org>
gcc/testsuite/
* gcc.target/powerpc/vector_float.c: Skip if not lp64.
This is DR 2032 which says that the restrictions regarding template
parameter packs and default arguments apply to variable templates as
well, but we weren't detecting that.
gcc/cp/ChangeLog:
DR 2032
PR c++/96218
* pt.c (check_default_tmpl_args): Also consider variable
templates.
gcc/testsuite/ChangeLog:
DR 2032
PR c++/96218
* g++.dg/cpp1y/var-templ67.C: New test.
As mentioned in the PR, the fallback path when LSE is unavailable writes
incorrect registers to the memory if the previous content compares equal
to x0, x1 - it writes copy of x0, x1 from the start of function, but it
should write x2, x3.
2020-08-03 Jakub Jelinek <jakub@redhat.com>
PR target/96402
* config/aarch64/lse.S (__aarch64_cas16_acq_rel): Use x2, x3 instead
of x(tmp0), x(tmp1) in STXP arguments.
* gcc.target/aarch64/pr96402.c: New test.
This prevents a ... token in code examples from being turned into a
single HORIZONTAL ELLIPSIS glyph (e.g. via the HTML … entity).
gcc/ChangeLog:
* doc/cpp.texi (Variadic Macros): Use the exact ... token in
code examples.
Standalone attach and detach clauses should not create present/release
mappings for Fortran array descriptors (e.g. used when we have a pointer
to an array), both because it is unnecessary and because those mappings
will be incorrectly subject to reference counting. Simply omitting the
mappings means we just use GOMP_MAP_TO_PSET and GOMP_MAP_{ATTACH,DETACH}
mappings for array descriptors.
That requires a tweak in gimplify.c, since we may now see GOMP_MAP_TO_PSET
without a preceding data-movement mapping.
2020-08-03 Julian Brown <julian@codesourcery.com>
Thomas Schwinge <thomas@codesourcery.com>
gcc/fortran/
* trans-openmp.c (gfc_trans_omp_clauses): Don't create present/release
mappings for array descriptors.
gcc/
* gimplify.c (gimplify_omp_target_update): Allow GOMP_MAP_TO_PSET
without a preceding data-movement mapping.
gcc/testsuite/
* gfortran.dg/goacc/attach-descriptor.f90: Update pattern output. Add
scanning of gimplify dump.
libgomp/
* testsuite/libgomp.oacc-fortran/attach-descriptor-1.f90: Don't run for
shared-memory devices. Extend with further checking.
Co-Authored-By: Thomas Schwinge <thomas@codesourcery.com>
Work on the Arm64 port shows that these two macros can be declared
ahead of the version in darwin.h which needs to override (for X86
and PPC this wasn't needed).
gcc/ChangeLog:
* config/darwin.h (ASM_DECLARE_FUNCTION_NAME): UNDEF before
use.
(DEF_MIN_OSX_VERSION): Only define if there's no existing
def.
The common code that selects suitable sections for literals needs
to inspect the machine_mode. For some sub-targets that might be
represented as a poly-int.
There was a workaround in place that allowed for cases where the poly
int had only one component. This removes the workaround and handles
the cases where we care about the machine_mode size.
gcc/ChangeLog:
* config/darwin.c (IN_TARGET_CODE): Remove.
(darwin_mergeable_constant_section): Handle poly-int machine modes.
(machopic_select_rtx_section): Likewise.
This patch removes the generation of HSAIL from the compiler, the HSA
offloading plugin from libgomp and the associated testsuite tests and
infrastructure bits from the respective testsuites.
Apart from removal of the obvious files, I removed bits that I found
by searching for HSA related terms and by re-tracing my steps and
looking at the patches that introduced HSA in the first place. I did
not remove everything these patches brought in, for example:
- the mechanism to pass offload-target specific info from the application to
the offloading plugin - but the same mechanism is also used to
communicate number of teams and the thread limit to all offload targets.
- run_func hook in gomp_device_descr stays too, although now it is
not used. If some future offload target would like the ability to
refuse to offload some functions, it can use it. It is easy to
remove as a follow-up if it is considered clutter, though.
- configure options --with-hsa-runtime=PATH, -with-hsa-runtime-include=PATH
and --with-hsa-runtime-lib=PATH rmeain because GCN uses them too.
- Surprisingly, GOMP_TARGET_ARG_HSA_KERNEL_ATTRIBUTES (a constant
from gomp-constants.h) appears in the source of the amdgcn libgomp
plugin, although I tend to think that code path is not ever used
and this patch certainly removes it from the compiler.
Nevertheless, it seems it has potential value beyond HSAIL and so
I've kept it, it can of course always be easily removed in the
future of GCN folk abandon it too.
- I assume constants OFFLOAD_TARGET_TYPE_HSA and GOMP_DEVICE_HSA
need to stay indefinitely too just so that no future offload
target picks that number.
- I have kept dg-require-effective-target
offload_device_nonshared_as requirement of thests which have it.
It is quite probable I missed some small HSA artifacts but those
should be easy to remove later as we find them.
include/ChangeLog:
2020-07-24 Martin Jambor <mjambor@suse.cz>
* gomp-constants.h (GOMP_VERSION_HSA): Remove.
gcc/ChangeLog:
2020-07-24 Martin Jambor <mjambor@suse.cz>
* hsa-brig-format.h: Moved to brig/brigfrontend.
* hsa-brig.c: Removed.
* hsa-builtins.def: Likewise.
* hsa-common.c: Likewise.
* hsa-common.h: Likewise.
* hsa-dump.c: Likewise.
* hsa-gen.c: Likewise.
* hsa-regalloc.c: Likewise.
* ipa-hsa.c: Likewise.
* omp-grid.c: Likewise.
* omp-grid.h: Likewise.
* Makefile.in (BUILTINS_DEF): Remove hsa-builtins.def.
(OBJS): Remove hsa-common.o, hsa-gen.o, hsa-regalloc.o, hsa-brig.o,
hsa-dump.o, ipa-hsa.c and omp-grid.o.
(GTFILES): Removed hsa-common.c and omp-expand.c.
* builtins.def: Remove processing of hsa-builtins.def.
(DEF_HSA_BUILTIN): Remove.
* common.opt (flag_disable_hsa): Remove.
(-Whsa): Ignore.
* config.in (ENABLE_HSA): Removed.
* configure.ac: Removed handling configuration for hsa offloading.
(ENABLE_HSA): Removed.
* configure: Regenerated.
* doc/install.texi (--enable-offload-targets): Remove hsa from the
example.
(--with-hsa-runtime): Reword to reference any HSA run-time, not
specifically HSA offloading.
* doc/invoke.texi (Option Summary): Remove -Whsa.
(Warning Options): Likewise.
(Optimize Options): Remove hsa-gen-debug-stores.
* doc/passes.texi (Regular IPA passes): Remove section on IPA HSA
pass.
* gimple-low.c (lower_stmt): Remove GIMPLE_OMP_GRID_BODY case.
* gimple-pretty-print.c (dump_gimple_omp_for): Likewise.
(dump_gimple_omp_block): Likewise.
(pp_gimple_stmt_1): Likewise.
* gimple-walk.c (walk_gimple_stmt): Likewise.
* gimple.c (gimple_build_omp_grid_body): Removed function.
(gimple_copy): Remove GIMPLE_OMP_GRID_BODY case.
* gimple.def (GIMPLE_OMP_GRID_BODY): Removed.
* gimple.h (gf_mask): Removed GF_OMP_PARALLEL_GRID_PHONY,
OMP_FOR_KIND_GRID_LOOP, GF_OMP_FOR_GRID_PHONY,
GF_OMP_FOR_GRID_INTRA_GROUP, GF_OMP_FOR_GRID_GROUP_ITER and
GF_OMP_TEAMS_GRID_PHONY. Renumbered GF_OMP_FOR_KIND_SIMD and
GF_OMP_TEAMS_HOST.
(gimple_build_omp_grid_body): Removed declaration.
(gimple_has_substatements): Remove GIMPLE_OMP_GRID_BODY case.
(gimple_omp_for_grid_phony): Removed.
(gimple_omp_for_set_grid_phony): Likewise.
(gimple_omp_for_grid_intra_group): Likewise.
(gimple_omp_for_grid_intra_group): Likewise.
(gimple_omp_for_grid_group_iter): Likewise.
(gimple_omp_for_set_grid_group_iter): Likewise.
(gimple_omp_parallel_grid_phony): Likewise.
(gimple_omp_parallel_set_grid_phony): Likewise.
(gimple_omp_teams_grid_phony): Likewise.
(gimple_omp_teams_set_grid_phony): Likewise.
(CASE_GIMPLE_OMP): Remove GIMPLE_OMP_GRID_BODY case.
* lto-section-in.c (lto_section_name): Removed hsa.
* lto-streamer.h (lto_section_type): Removed LTO_section_ipa_hsa.
* lto-wrapper.c (compile_images_for_offload_targets): Remove special
handling of hsa.
* omp-expand.c: Do not include hsa-common.h and gt-omp-expand.h.
(parallel_needs_hsa_kernel_p): Removed.
(grid_launch_attributes_trees): Likewise.
(grid_launch_attributes_trees): Likewise.
(grid_create_kernel_launch_attr_types): Likewise.
(grid_insert_store_range_dim): Likewise.
(grid_get_kernel_launch_attributes): Likewise.
(get_target_arguments): Remove code passing HSA grid sizes.
(grid_expand_omp_for_loop): Remove.
(grid_arg_decl_map): Likewise.
(grid_remap_kernel_arg_accesses): Likewise.
(grid_expand_target_grid_body): Likewise.
(expand_omp): Remove call to grid_expand_target_grid_body.
(omp_make_gimple_edges): Remove GIMPLE_OMP_GRID_BODY case.
* omp-general.c: Do not include hsa-common.h.
(omp_maybe_offloaded): Do not check for HSA offloading.
(omp_context_selector_matches): Likewise.
* omp-low.c: Do not include hsa-common.h and omp-grid.h.
(build_outer_var_ref): Remove handling of GIMPLE_OMP_GRID_BODY.
(scan_sharing_clauses): Remove handling of OMP_CLAUSE__GRIDDIM_.
(scan_omp_parallel): Remove handling of the phoney variant.
(check_omp_nesting_restrictions): Remove handling of
GIMPLE_OMP_GRID_BODY and GF_OMP_FOR_KIND_GRID_LOOP.
(scan_omp_1_stmt): Remove handling of GIMPLE_OMP_GRID_BODY.
(lower_omp_for_lastprivate): Remove handling of gridified loops.
(lower_omp_for): Remove phony loop handling.
(lower_omp_taskreg): Remove phony construct handling.
(lower_omp_teams): Likewise.
(lower_omp_grid_body): Removed.
(lower_omp_1): Remove GIMPLE_OMP_GRID_BODY case.
(execute_lower_omp): Do not call omp_grid_gridify_all_targets.
* opts.c (common_handle_option): Do not handle hsa when processing
OPT_foffload_.
* params.opt (hsa-gen-debug-stores): Remove.
* passes.def: Remove pass_ipa_hsa and pass_gen_hsail.
* timevar.def: Remove TV_IPA_HSA.
* toplev.c: Do not include hsa-common.h.
(compile_file): Do not call hsa_output_brig.
* tree-core.h (enum omp_clause_code): Remove OMP_CLAUSE__GRIDDIM_.
(tree_omp_clause): Remove union field dimension.
* tree-nested.c (convert_nonlocal_omp_clauses): Remove the
OMP_CLAUSE__GRIDDIM_ case.
(convert_local_omp_clauses): Likewise.
* tree-pass.h (make_pass_gen_hsail): Remove declaration.
(make_pass_ipa_hsa): Likewise.
* tree-pretty-print.c (dump_omp_clause): Remove GIMPLE_OMP_GRID_BODY
case.
* tree.c (omp_clause_num_ops): Remove the element corresponding to
OMP_CLAUSE__GRIDDIM_.
(omp_clause_code_name): Likewise.
(walk_tree_1): Remove GIMPLE_OMP_GRID_BODY case.
* tree.h (OMP_CLAUSE__GRIDDIM__DIMENSION): Remove.
(OMP_CLAUSE__GRIDDIM__SIZE): Likewise.
(OMP_CLAUSE__GRIDDIM__GROUP): Likewise.
gcc/fortran/ChangeLog:
2020-07-24 Martin Jambor <mjambor@suse.cz>
* f95-lang.c (gfc_init_builtin_functions): Remove processing of
hsa-builtins.def.
gcc/brig/ChangeLog:
2020-07-24 Martin Jambor <mjambor@suse.cz>
* brigfrontend/brig-util.h (hsa_type_packed_p): Declared.
* brigfrontend/brig-util.cc (hsa_type_packed_p): Moved here from
removed gcc/hsa-common.c.
libgomp/ChangeLog:
2020-07-24 Martin Jambor <mjambor@suse.cz>
* plugin/Makefrag.am: Remove configuration of HSA plugin.
* aclocal.m4: Regenerated.
* Makefile.in: Regenerated.
* config.h.in: Regenerated.
* configure: Regenerated.
* plugin/configfrag.ac: Likewise.
* plugin/hsa_ext_finalize.h: Removed.
* plugin/plugin-hsa.c: Likewise.
* testsuite/Makefile.in: Regenerated.
* testsuite/lib/libgomp.exp
(offload_target_to_openacc_device_type): Remove hsa case.
(check_effective_target_hsa_offloading_selected_nocache): Removed
(check_effective_target_hsa_offloading_selected): Likewise.
(libgomp_init): Do not add -Wno-hsa to additional_flags.
* testsuite/libgomp.hsa.c/alloca-1.c: Removed test.
* testsuite/libgomp.hsa.c/bitfield-1.c: Likewise.
* testsuite/libgomp.hsa.c/bits-insns.c: Likewise.
* testsuite/libgomp.hsa.c/builtins-1.c: Likewise.
* testsuite/libgomp.hsa.c/c.exp: Likewise.
* testsuite/libgomp.hsa.c/complex-1.c: Likewise.
* testsuite/libgomp.hsa.c/complex-align-2.c: Likewise.
* testsuite/libgomp.hsa.c/formal-actual-args-1.c: Likewise.
* testsuite/libgomp.hsa.c/function-call-1.c: Likewise.
* testsuite/libgomp.hsa.c/get-level-1.c: Likewise.
* testsuite/libgomp.hsa.c/gridify-1.c: Likewise.
* testsuite/libgomp.hsa.c/gridify-2.c: Likewise.
* testsuite/libgomp.hsa.c/gridify-3.c: Likewise.
* testsuite/libgomp.hsa.c/gridify-4.c: Likewise.
* testsuite/libgomp.hsa.c/memory-operations-1.c: Likewise.
* testsuite/libgomp.hsa.c/pr69568.c: Likewise.
* testsuite/libgomp.hsa.c/pr82416.c: Likewise.
* testsuite/libgomp.hsa.c/rotate-1.c: Likewise.
* testsuite/libgomp.hsa.c/staticvar.c: Likewise.
* testsuite/libgomp.hsa.c/switch-1.c: Likewise.
* testsuite/libgomp.hsa.c/switch-branch-1.c: Likewise.
* testsuite/libgomp.hsa.c/switch-sbr-2.c: Likewise.
* testsuite/libgomp.hsa.c/tiling-1.c: Likewise.
* testsuite/libgomp.hsa.c/tiling-2.c: Likewise.
gcc/testsuite/ChangeLog:
2020-07-24 Martin Jambor <mjambor@suse.cz>
* lib/target-supports.exp (check_effective_target_offload_hsa):
Removed.
* c-c++-common/gomp/gridify-1.c: Removed test.
* c-c++-common/gomp/gridify-2.c: Likewise.
* c-c++-common/gomp/gridify-3.c: Likewise.
* c-c++-common/gomp/hsa-indirect-call-1.c: Likewise.
* gfortran.dg/gomp/gridify-1.f90: Likewise.
* gcc.dg/gomp/gomp.exp: Do not pass -Wno-hsa to tests.
* g++.dg/gomp/gomp.exp: Likewise.
* gfortran.dg/gomp/gomp.exp: Likewise.
The test case bb-slp-20.c in the gcc testsuit will cause an
ICE in the expand pass due to the lack of a pattern for
subtraction of the VNx2SI mode. This patch solve this problem
by adding support for unpacked sub.
gcc/ChangeLog:
* config/aarch64/aarch64-sve.md (sub<mode>3): Add support for
unpacked vectors.
The MSP430 GAS option "-md" is supposed to indicate that the CRT startup
code should copy data from ROM to RAM at startup. However, this option
has no effect; GAS handles the related behaviour automatically.
gcc/ChangeLog:
* config/msp430/msp430.h (ASM_SPEC): Don't pass on "-md" option.
SMS is performed before reload, and each insn in SMS schedule uses
pseudo-register. After reload, regrename pass try to adjust the hard
registers with def/use chain created by build_def_use. For now, regrename
pass isn't aware of VLIW bundles created by SMS, it may updated a register
which may not be really unused, which will causes invalid VLIW bundles.
Before the final schedule, we recheck the validation of VLIW bundles and
reschedule the conflicted insns to avoid the above issue. Rescheduling
the conflicted insns will destroy SMS schedule of the kernel loop, which
would be harmful to performance.
2020-08-03 Yunde Zhong <zhongyunde@huawei.com>
gcc/
PR rtl-optimization/95696
* regrename.c (regrename_analyze): New param include_all_block_p
with default value TRUE. If set to false, avoid disrupting SMS
schedule.
* regrename.h (regrename_analyze): Adjust prototype.
Unused global UNDEFs can have side-effects in some circumstances so
the following patch avoids them by treating them the same as other
to be discarded DEFs - make them local.
2020-08-03 Richard Biener <rguenther@suse.de>
PR lto/96385
libiberty/
* simple-object-elf.c
(simple_object_elf_copy_lto_debug_sections): Localize global
UNDEFs and reuse the prevailing name.
This patch add support for Fujitsu A64FX, as the first step of adding
A64FX machine model.
A64FX is used in FUJITSU Supercomputer PRIMEHPC FX1000,
PRIMEHPC FX700, and supercomputer Fugaku.
The official microarchitecture information of A64FX can be read at
https://github.com/fujitsu/A64FX.
2020-08-03 Qian jianhua <qianjh@cn.fujitsu.com>
gcc/
* config/aarch64/aarch64-cores.def (a64fx): New core.
* config/aarch64/aarch64-tune.md: Regenerated.
* config/aarch64/aarch64.c (a64fx_prefetch_tune, a64fx_tunings): New.
* doc/invoke.texi: Add a64fx to the list.
The following patch avoids simplifying x-0.0 to x when -fsignaling-nans
is specified, which resolves PR rtl-optimization 61494. Indeed, running
the test program attached to that PR now reports no failures.
2020-08-02 Roger Sayle <roger@nextmovesoftware.com>
gcc/ChangeLog
PR rtl-optimization/61494
* simplify-rtx.c (simplify_binary_operation_1) [MINUS]: Don't
simplify x - 0.0 with -fsignaling-nans.
This patch silences a number of unused parameter warnings whilst
compiling both generic-match.c and gimple-match.c. The problem is
that multiple (polymorphic) functions are generated for generic_simplify
and gimple_simplify, each handling tree codes with a specific number
of children. Currently, there are no simplifications for tree codes
with four or five children, leading to functions with "empty" bodies
and unused function arguments. This patch detects those cases, and
generates stub functions (with anonymous arguments) to silence these
warnings.
2020-08-03 Roger Sayle <roger@nextmovesoftware.com>
gcc/ChangeLog
* genmatch.c (decision_tree::gen): Emit stub functions for
tree code operand counts that have no simplifications.
(main): Correct comment typo.
The only two changes which aren't obvious are s/dirified/specified/ and
s/edirially/especially/ which appear to be caused by a s/spec/dir/ edit
that went too far.
gcc/ChangeLog:
* gimple-ssa-sprintf.c: Fix typos in comments.
My previous fix added an unchecked call to fgets in the new function readline.
fgets can fail when there's an error reading the file in which case it returns
NULL. It also returns NULL when the next character is EOF.
The EOF case is already covered by the existing code but the error case isn't.
This fixes it by returning the empty string on error.
Also I now use strnlen instead of strlen to make sure we never read outside the
buffer.
This was flagged by Matthew Malcomson during his hwasan work.
gcc/ChangeLog:
* config/aarch64/driver-aarch64.c (readline): Check return value fgets.
This makes us error when the ! operator modifier is encountered
when not targeting GIMPLE.
2020-08-03 Richard Biener <rguenther@suse.de>
* genmatch.c (parser::gimple): New.
(parser::parser): Initialize gimple flag member.
(parser::parse_expr): Error on ! operator modifier when
not targeting GIMPLE.
(main): Pass down gimple flag to parser ctor.
* doc/match-and-simplify.texi: Amend accordingly.
Moves no frame access error to own function, adding use of it for both
when get_framedecl() cannot find a path to the outer function frame, and
guarding get_decl_tree() from recursively calling itself.
gcc/d/ChangeLog:
PR d/96254
* d-codegen.cc (error_no_frame_access): New.
(get_frame_for_symbol): Use fdparent name in error message.
(get_framedecl): Replace call to assert with error.
* d-tree.h (error_no_frame_access): Declare.
* decl.cc (get_decl_tree): Detect recursion and error.
gcc/testsuite/ChangeLog:
PR d/96254
* gdc.dg/pr96254a.d: New test.
* gdc.dg/pr96254b.d: New test.
