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libstdc++-v3/ChangeLog:
* testsuite/libstdc++-prettyprinters/chrono.cc: Only test
printer for chrono::zoned_time for cx11 ABI and tzdb effective
target.
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As noted in https://github.com/llvm/llvm-project/issues/62623 there are
no tsan interceptors for some of the new POSIX-1:202x APIs added by
https://austingroupbugs.net/view.php?id=1216 so tsan gives false
positive warnings for try_lock_for on timed mutexes.
Disable the uses of the new pthread_mutex_clocklock API when tsan is
active. This changes the semantics of the try_lock_for functions,
because it can change which clock is used for the wait. This means those
functions might be affected by system clock adjustments when tsan is
used, when they would not be affected otherwise.
Reviewed-by: Thomas Rodgers <trodgers@redhat.com>
Reviewed-by: Mike Crowe <mac@mcrowe.com>
libstdc++-v3/ChangeLog:
* acinclude.m4 (GLIBCXX_CHECK_PTHREAD_MUTEX_CLOCKLOCK): Define
_GLIBCXX_USE_PTHREAD_MUTEX_CLOCKLOCK in terms of _GLIBCXX_TSAN.
* configure: Regenerate.
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The output generated by "gnat --help-ada" should include descriptions for
the newly added -gnatw_s and -gnatw_S switches".
gcc/ada/
* usage.adb: Generate output text describing the -gnatw_s switch
(and the corresponding -gnatw_S switch).
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The current expansion of the 'Reduce attribute uses the resolution type of
the expression for the accumulator. Now this type can be unresolved or set
to a universal type, for example if it is itself the prefix of the 'Image
attribute, and this may yield a spurious type mismatch error in that case.
This changes the expansion to use the accumulator type instead as defined
by the RM 4.5.10 clause, albeit only in the prefixed case for now.
gcc/ada/
* exp_attr.adb (Expand_N_Attribute_Reference) <Attribute_Reduce>:
Use the canonical accumulator type as the type of the accumulator
in the prefixed case.
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This happens when the iterated component does not really iterate.
gcc/ada/
* exp_aggr.adb (Expand_Array_Aggregate): Do not set Warnings_Off on
the temporary created when in-place expansion is not possible.
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The problem is that the freeze node generated for the type of a static
subexpression present in the expression function is incorrectly placed
inside instead of outside the function.
gcc/ada/
* freeze.adb (Freeze_Expression): When the freezing is to be done
outside the current scope, skip any scope that is an internal loop.
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This happens because the array component depends on a discriminant.
gcc/ada/
* exp_imgv.adb (Rewrite_Object_Image): If the prefix is a component
that depends on a discriminant, create an actual subtype for it.
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The preanalysis of a predicate set on one of the record types was causing
premature freezing of another record type.
gcc/ada/
* sem_ch13.adb: Add with and use clauses for Expander.
(Resolve_Aspect_Expressions) <Aspect_Predicate>: Emulate a
bona-fide preanalysis setup before calling
Resolve_Aspect_Expression.
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Following changes in GNATprove, proofs need to be amended.
gcc/ada/
* libgnat/s-aridou.adb (Lemma_Div_Pow2): Add assertion.
* libgnat/s-arit32.adb (Lemma_Abs_Div_Commutation): Simplify.
* libgnat/s-expmod.adb (Lemma_Exp_Mod): Add assertions.
(Lemma_Euclidean_Mod): Add body to lemma.
(Lemma_Mult_Mod): Add assertion.
* libgnat/s-valueu.adb (Scan_Raw_Unsigned): Modify assertion.
* libgnat/s-vauspe.ads (Raw_Unsigned_Last_Ghost): Add
postcondition.
* libgnat/s-widthi.adb: Use more precise types.
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In Ada 2022, user-defined literal aspects are nonoverridable but the named
subprograms present in them can be overridden, including for untagged types.
gcc/ada/
* sem_res.adb (Has_Applicable_User_Defined_Literal): Apply the
same processing for derived untagged types as for tagged types.
* sem_util.ads (Corresponding_Primitive_Op): Adjust description.
* sem_util.adb (Corresponding_Primitive_Op): Handle untagged
types.
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gcc/ada/
* sem_attr.adb
(Analyze_Attribute_Old_Result): When preanalyzing a class-wide
condition, search in the scopes stack for the subprogram that has
the condition. This is required because returning the current
scope causes reporting spurious errors when the occurrence of the
attribute is found, for example, in a quantified expression.
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gcc/ada/
* exp_ch6.adb
(Needs_BIP_Alloc_Form): Return False for functions with foreign
convention since we never use build-in-place for such functions.
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When preanalyzing expressions in GNATprove mode, e.g. Pre/Post
contracts, we apply checks, because these expressions will never
be expanded. This didn't happen for aggregate expressions, most
likely because of an oversight.
gcc/ada/
* sem_util.adb (Aggregate_Constraint_Checks): Don't exit early
when preanalysing in GNATprove mode. Now the condition is
consistent with other similar conditions in other code.
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-gnatyD was documented in the user guide but not in `gnat --help-ada`.
gcc/ada/
* usage.adb (Usage): Document -gnatyD.
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Both record types need to have their components 'aliased' to match their
C version. The mismatch could be observed when using LTO:
warning: type of 'r_debug' does not match original declaration
[-Wlto-type-mismatch]
/usr/include/link.h:66:23: note: type 'struct r_debug' should match
type 'struct system__traceback__symbolic__module_name__build_...
...cache_for_all_modules__r_debug_type'
gcc/ada/
* libgnat/s-tsmona__linux.adb (link_map, r_debug_type): Add
'aliased' on all components.
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gcc/ada/
* libgnat/system-linux-ppc.ads: Add Support_Atomic_Primitives.
* libgnat/s-atopri__32.ads: Add 32 bit version of s-atopri.ads.
* Makefile.rtl: Use s-atopro__32.ads for ppc-linux.
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It avoids to recreate an actual subtype for an explicit dereference.
gcc/ada/
* sem_util.adb (Get_Actual_Subtype): For an explicit dereference,
return the Actual_Designated_Subtype if it is present.
(Get_Actual_Subtype_If_Available): Likewise.
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Similar to tags on warnings [-gnatwx], we add tags on style messages
[-gnatyx] when -gnatw.d is enabled.
gcc/ada/
* errout.ads: Update comment.
* errout.adb (Skip_Msg_Insertion_Warning): Update to take e.g.
-gnatyM into account.
* erroutc.adb (Get_Warning_Option, Get_Warning_Tag)
(Prescan_Message): Add support for Style tags.
* par-ch5.adb, par-ch6.adb, par-ch7.adb, par-endh.adb,
par-util.adb, style.adb, styleg.adb: Set tag on all style
messages.
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I found a couple of spots using the typo "patterm" rather than the
correct "pattern".
gcc/ada/
* doc/gnat_ugn/building_executable_programs_with_gnat.rst
(Switches_for_gnatbind): Fix typo.
* libgnat/g-spipat.ads: Fix typo.
* gnat_ugn.texi: Regenerate.
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This makes the following adjustments to the semantics and implementation of
storage models in the compiler:
1. By-copy semantics in subprogram calls: when an object accessed with a
nonnative storage model is passed as an actual parameter in a call to
a subprogram, an intermediate copy made on the host is passed instead.
2. More generally, any additional temporary required on the host by the
semantics of nonnative storage models is now created by the front-end
instead of the code generator.
3. All the temporaries created on the host for nonnative storage models
are allocated on the secondary stack instead of the primary stack.
As a result, this should simplify the implementation in code generators.
gcc/ada/
* exp_aggr.adb (Build_Assignment_With_Temporary): Adjust comment
and fix type of second parameter. Create the temporary on the
secondary stack by calling Build_Temporary_On_Secondary_Stack.
(Convert_Array_Aggr_In_Allocator): Adjust formatting.
(Expand_Array_Aggregate): Likewise.
* exp_ch4.adb (Expand_N_Allocator): Set Actual_Designated_Subtype
on the dereference in the initialization for all composite types.
* exp_ch5.adb (Expand_N_Assignment_Statement): Create a temporary
on the host for an assignment between nonnative storage models.
Suppress more checks when Suppress_Assignment_Checks is set.
* exp_ch6.adb (Add_Simple_Call_By_Copy_Code): Deal with actuals
that are dereferences with an Actual_Designated_Subtype. Add
support for nonnative storage models.
(Expand_Actuals): Create a copy if the actual is a dereference
with a nonnative storage model.
* exp_util.ads (Build_Temporary_On_Secondary_Stack): Declare.
* exp_util.adb (Build_Temporary_On_Secondary_Stack): New function.
* sem_ch5.adb (Analyze_Assignment.Set_Assignment_Type): Do not
build an actual subtype for dereferences with an
Actual_Designated_Subtype
* sinfo.ads (Actual_Designated_Subtype): Adjust documentation.
(Suppress_Assignment_Checks): Likewise.
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Invariant procedure bodies are created either by expansion of freezing
nodes (but only in ordinary compilation mode) or at the end of package
private declarations (but not for with private types in the type
derivation chain).
In GNATprove mode we didn't create invariant procedure bodies in
lightweight expansion, so we didn't create them at all when there were
private types in the type derivation chain.
This patch copies the relevant freezing part from ordinary to
lightweight expansion. This obviously involves code duplication,
but it seems better to duplicate whole sections that work properly
instead of small pieces that are incomplete. There are other pieces
of freezing that are similarly duplicated, so this patch doesn't make
the code substantially worse.
gcc/ada/
* exp_spark.adb (SPARK_Freeze_Type): Copy whole handling of DIC
and Type_Invariant from Freeze_Type.
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gcc/ada/
* sem_util.adb (Subprogram_Name): If what's passed is already an
entity, use that for the name.
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gcc/ada/
* doc/gnat_rm/standard_and_implementation_defined_restrictions.rst
(No_Dependence): Give examples of new No_Dependence restrictions.
* gnat_rm.texi: Regenerate.
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ASCII is special cased but this wasn't taking into account all cases
such as Standard.ASCII.
gcc/ada/
* snames.ads-tmpl (Name_ASCII): New.
* style.adb (Check_Identifier): Fix handling of ASCII.
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The support of superflat arrays in the language generates an overhead that
the code generator attempts to minimize, but it cannot handle too complex
cases and it would be helpful if the front-end could lend a hand.
This change introduces the Cannot_Be_Superflat flag on N_Range nodes for
this purpose, and sets it on the result of string concatenations when it
is guaranteed to be nonnull.
gcc/ada/
* gen_il-fields.ads (Opt_Field_Enum): Add Cannot_Be_Superflat.
* gen_il-gen-gen_nodes.adb (N_Range): Add Cannot_Be_Superflat as
semantical flag and change Includes_Infinities to semantical.
* sinfo.ads (Cannot_Be_Superflat): Document it for N_Range.
* exp_ch4.adb (Expand_Concatenate): Set Cannot_Be_Superflat on the
range of the result if the result cannot be null.
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We want the field to be initialized to No_Uint because we want to be
able to test in GNAT LLVM whether we've already set it so we can be
sure we only set it once.
gcc/ada/
* gen_il-gen-gen_nodes.adb (Present_Expr): Type is now Uint.
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Using Inline_For_Proof annotation on key expression functions makes
it possible to remove hundreds of lines of ghost code that were
previously needed to guide provers.
gcc/ada/
* libgnat/s-aridou.adb (Big3, Is_Mult_Decomposition)
(Is_Scaled_Mult_Decomposition): Add annotation for inlining.
(Double_Divide, Scaled_Divide): Simplify and remove ghost code.
(Prove_Multiplication): Add calls to lemmas to make proof go
through.
* libgnat/s-aridou.ads (Big, In_Double_Int_Range): Add annotation
for inlining.
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Proof of Superbounded internal unit requires a little more help.
gcc/ada/
* libgnat/a-strsup.adb: Add intermediate assertions.
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When using -gnatc, dependencies on preprocessor and config files
were not recorded.
gcc/ada/
* gnat1drv.adb: Ensure all dependencies are recorded even when not
generating code.
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Set Loop_Variant assertion policy to Ignore in both.
gcc/ada/
* libgnat/a-strsup.adb: Set assertion policy for Loop_Variant.
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Factor out Par_Vis/Install_Parent/Par_Installed in Instantiate_Package_Body
and Instantiate_Subprogram_Body.
gcc/ada/
* sem_ch12.adb (Instantiate_Package_Body): Simplify if/then/else.
(Instantiate_Subprogram_Body): Likewise.
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Use Assert_And_Cut to simplify proof of second part of the Scaled_Divide.
Add intermediate assertions and simplify where necessary.
gcc/ada/
* libgnat/s-aridou.adb:
(Big3): Remove override made useless.
(Lemma_Quot_Rem): Add new lemma and justify it, as no prover
manages to prove it.
(Lemma_Div_Pow2): Use new lemma Lemma_Quot_Rem.
(Prove_Scaled_Mult_Decomposition_Regroup3): Retype for
simplification.
(Scaled_Divide): Remove useless assertions.Decompose some
assertions with cut operations. Use Assert_And_Cut for second
half. Add assertions.
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This patch would like to align the stdint.h to the stdint-gcc.h for all
the RVV test files. Aka:
stdint.h => stdint-gcc.h
Signed-off-by: Pan Li <pan2.li@intel.com>
gcc/testsuite/ChangeLog:
* gcc.target/riscv/rvv/autovec/binop/shift-scalar-template.h:
Replace stdint.h with stdint-gcc.h.
* gcc.target/riscv/rvv/autovec/binop/shift-template.h: Ditto.
* gcc.target/riscv/rvv/autovec/binop/vadd-template.h: Ditto.
* gcc.target/riscv/rvv/autovec/binop/vand-template.h: Ditto.
* gcc.target/riscv/rvv/autovec/binop/vdiv-template.h: Ditto.
* gcc.target/riscv/rvv/autovec/binop/vmax-template.h: Ditto.
* gcc.target/riscv/rvv/autovec/binop/vmin-template.h: Ditto.
* gcc.target/riscv/rvv/autovec/binop/vmul-template.h: Ditto.
* gcc.target/riscv/rvv/autovec/binop/vor-template.h: Ditto.
* gcc.target/riscv/rvv/autovec/binop/vrem-template.h: Ditto.
* gcc.target/riscv/rvv/autovec/binop/vsub-template.h: Ditto.
* gcc.target/riscv/rvv/autovec/binop/vxor-template.h: Ditto.
* gcc.target/riscv/rvv/autovec/series-1.c: Ditto.
* gcc.target/riscv/rvv/autovec/vmv-imm-run.c: Ditto.
* gcc.target/riscv/rvv/autovec/vmv-imm-template.h: Ditto.
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Vectorize memset with a constant length of less than or equal to 64
bytes.
Do not perform a libc function call into memset in case the size is not
a compile-time constant but bounded and the upper bound is less than or
equal to 256 bytes.
gcc/ChangeLog:
* config/s390/s390-protos.h (s390_expand_setmem): Change
function signature.
* config/s390/s390.cc (s390_expand_setmem): For memset's less
than or equal to 256 byte do not perform a libc call.
* config/s390/s390.md: Change expander into a version which
takes 8 operands.
gcc/testsuite/ChangeLog:
* gcc.target/s390/memset-1.c: Test case memset1 makes use of
vst, now.
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gcc/ChangeLog:
* config/s390/s390-protos.h (s390_expand_movmem): New.
* config/s390/s390.cc (s390_expand_movmem): New.
* config/s390/s390.md (movmem<mode>): New.
(*mvcrl): New.
(mvcrl): New.
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Do not perform a libc function call into memcpy in case the size is not
a compile-time constant but bounded and the upper bound is less than or
equal to 256 bytes.
gcc/ChangeLog:
* config/s390/s390-protos.h (s390_expand_cpymem): Change
function signature.
* config/s390/s390.cc (s390_expand_cpymem): For memcpy's less
than or equal to 256 byte do not perform a libc call.
(s390_expand_insv): Adapt new function signature of
s390_expand_cpymem.
* config/s390/s390.md: Change expander into a version which
takes 8 operands.
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2023-05-16 Paul Thomas <pault@gcc.gnu.org>
gcc/fortran
PR fortran/105152
* interface.cc (gfc_compare_actual_formal): Emit an error if an
unlimited polymorphic actual is not matched either to an
unlimited or assumed type formal argument.
PR fortran/100193
* resolve.cc (resolve_ordinary_assign): Emit an error if the
var expression of an ordinary assignment is a proc pointer
component.
PR fortran/87496
* trans-array.cc (gfc_walk_array_ref): Provide assumed shape
arrays coming from interface mapping with a viable arrayspec.
PR fortran/103389
* trans-expr.cc (gfc_conv_intrinsic_to_class): Tidy up flagging
of unlimited polymorphic 'class_ts'.
(gfc_conv_gfc_desc_to_cfi_desc): Assumed type is unlimited
polymorphic and should accept any actual type.
PR fortran/104429
(gfc_conv_procedure_call): Replace dreadful kludge with a call
to gfc_finalize_tree_expr. Avoid dereferencing a void pointer
by giving it the pointer type of the actual argument.
PR fortran/82774
(alloc_scalar_allocatable_subcomponent): Shorten the function
name and replace the symbol argument with the se string length.
If a deferred length character length is either not present or
is not a variable, give the typespec a variable and assign the
string length to that. Use gfc_deferred_strlen to find the
hidden string length component.
(gfc_trans_subcomponent_assign): Convert the expression before
the call to alloc_scalar_allocatable_subcomponent so that a
good string length is provided.
(gfc_trans_structure_assign): Remove the unneeded derived type
symbol from calls to gfc_trans_subcomponent_assign.
gcc/testsuite/
PR fortran/105152
* gfortran.dg/pr105152.f90 : New test
PR fortran/100193
* gfortran.dg/pr100193.f90 : New test
PR fortran/87946
* gfortran.dg/pr87946.f90 : New test
PR fortran/103389
* gfortran.dg/pr103389.f90 : New test
PR fortran/104429
* gfortran.dg/pr104429.f90 : New test
PR fortran/82774
* gfortran.dg/pr82774.f90 : New test
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A bunch of tests explicitly pass in -fdelete-null-pointer-checks and
fail if the target keeps null pointer checks. Skip such tests by
adding a dg-skip-if for keeps_null_pointer_checks.
gcc/testsuite/ChangeLog:
* gcc.dg/attr-returns-nonnull.c: Skip if
keeps_null_pointer_checks.
* gcc.dg/init-compare-1.c: Likewise.
* gcc.dg/ipa/pr85734.c: Likewise.
* gcc.dg/ipa/propmalloc-1.c: Likewise.
* gcc.dg/ipa/propmalloc-2.c: Likewise.
* gcc.dg/ipa/propmalloc-3.c: Likewise.
* gcc.dg/ipa/propmalloc-4.c: Likewise.
* gcc.dg/tree-ssa/evrp11.c: Likewise.
* gcc.dg/tree-ssa/pr83648.c: Likewise.
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This is version 2 of https://gcc.gnu.org/pipermail/gcc-patches/2021-August/577394.html
which does not depend on adding gimple_truth_valued_p at this point.
Instead will use zero_one_valued_p which is already used for mult simplifications
to make sure that we only have [0,1] rather having the mistake of maybe having [-1,0]
as the range for signed bools.
This shows up in a few places in GCC itself but only at -O1, we miss the min/max conversion
because of PR 107888 (which I will be testing seperately).
OK? Bootstrapped and tested on x86_64-linux-gnu with no regressions.
Thanks,
Andrew Pinski
PR tree-optimization/109424
gcc/ChangeLog:
* match.pd: Add patterns for min/max of zero_one_valued
values to `&`/`|`.
gcc/testsuite/ChangeLog:
* gcc.dg/tree-ssa/bool-12.c: New test.
* gcc.dg/tree-ssa/bool-13.c: New test.
* gcc.dg/tree-ssa/minmax-20.c: New test.
* gcc.dg/tree-ssa/minmax-21.c: New test.
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This patch is adding rounding mode operand and FRM_REGNUM dependency
into floating-point instructions.
The floating-point instructions we added FRM and rounding mode operand:
1. vfadd/vfsub
2. vfwadd/vfwsub
3. vfmul
4. vfdiv
5. vfwmul
6. vfwmacc/vfwnmacc/vfwmsac/vfwnmsac
7. vfsqrt
8. floating-point conversions.
9. floating-point reductions.
10. floating-point ternary.
The floating-point instructions we did NOT add FRM and rounding mode
operand:
1. vfabs/vfneg/vfsqrt7/vfrec7
2. vfmin/vfmax
3. comparisons
4. vfclass
5. vfsgnj/vfsgnjn/vfsgnjx
6. vfmerge
7. vfmv.v.f
gcc/ChangeLog:
* config/riscv/riscv-protos.h (enum frm_field_enum): New enum.
* config/riscv/riscv-vector-builtins.cc
(function_expander::use_ternop_insn): Add default rounding mode.
(function_expander::use_widen_ternop_insn): Ditto.
* config/riscv/riscv.cc (riscv_hard_regno_nregs): Add FRM REGNUM.
(riscv_hard_regno_mode_ok): Ditto.
(riscv_conditional_register_usage): Ditto.
* config/riscv/riscv.h (DWARF_FRAME_REGNUM): Ditto.
(FRM_REG_P): Ditto.
(RISCV_DWARF_FRM): Ditto.
* config/riscv/riscv.md: Ditto.
* config/riscv/vector-iterators.md: split no frm and has frm operations.
* config/riscv/vector.md (@pred_<optab><mode>_scalar): New pattern.
(@pred_<optab><mode>): Ditto.
Signed-off-by: Juzhe-Zhong <juzhe.zhong@rivai.ai>
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For C2x it was decided that _Atomic would be completely ignored on
function return types (just as was done for qualifiers in C11 DR#423),
to eliminate the potential for an rvalue returned by a function having
_Atomic-qualified type when an rvalue resulting from lvalue-to-rvalue
conversion could not have such a type. Implement this for GCC.
Bootstrapped with no regressions for x86_64-pc-linux-gnu.
gcc/c/
* c-decl.cc (grokdeclarator): Ignore _Atomic on function return
type for C2x.
gcc/testsuite/
* gcc.dg/qual-return-9.c, gcc.dg/qual-return-10.c: New tests.
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WG14 decided that __has_c_attribute should return the same value
(equal to the intended __STDC_VERSION__ value) for all standard
attributes in C2x, with values associated with when an attribute was
added to the working draft (or had semantics added or changed in the
working draft) only being used in earlier stages of development of
that draft. The intent is that the values for existing attributes
increase in future standard versions only if there are new features /
semantic changes for those attributes. Implement this change for GCC.
Bootstrapped with no regressions for x86_64-pc-linux-gnu.
gcc/c-family/
* c-lex.cc (c_common_has_attribute): Use 202311 as
__has_c_attribute return for all C2x attributes.
gcc/testsuite/
* gcc.dg/c2x-has-c-attribute-2.c: Expect 202311L return value from
__has_c_attribute for all C2x attributes.
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gcc/fortran/ChangeLog:
PR fortran/109846
* expr.cc (gfc_check_vardef_context): Check appropriate pointer
attribute for CLASS vs. non-CLASS function result in variable
definition context.
gcc/testsuite/ChangeLog:
PR fortran/109846
* gfortran.dg/ptr-func-5.f90: New test.
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<tldr>
We can now have int_range<N, RESIZABLE=false> for automatically
resizable ranges. int_range_max is now int_range<3, true>
for a 69X reduction in size from current trunk, and 6.9X reduction from
GCC12. This incurs a 5% performance penalty for VRP that is more than
covered by our > 13% improvements recently.
</tldr>
int_range_max is the temporary range object we use in the ranger for
integers. With the conversion to wide_int, this structure bloated up
significantly because wide_ints are huge (80 bytes a piece) and are
about 10 times as big as a plain tree. Since the temporary object
requires 255 sub-ranges, that's 255 * 80 * 2, plus the control word.
This means the structure grew from 4112 bytes to 40912 bytes.
This patch adds the ability to resize ranges as needed, defaulting to
no resizing, while int_range_max now defaults to 3 sub-ranges (instead
of 255) and grows to 255 when the range being calculated does not fit.
For example:
int_range<1> foo; // 1 sub-range with no resizing.
int_range<5> foo; // 5 sub-ranges with no resizing.
int_range<5, true> foo; // 5 sub-ranges with resizing.
I ran some tests and found that 3 sub-ranges cover 99% of cases, so
I've set the int_range_max default to that:
typedef int_range<3, /*RESIZABLE=*/true> int_range_max;
We don't bother growing incrementally, since the default covers most
cases and we have a 255 hard-limit. This hard limit could be reduced
to 128, since my tests never saw a range needing more than 124, but we
could do that as a follow-up if needed.
With 3-subranges, int_range_max is now 592 bytes versus 40912 for
trunk, and versus 4112 bytes for GCC12! The penalty is 5.04% for VRP
and 3.02% for threading, with no noticeable change in overall
compilation (0.27%). This is more than covered by our 13.26%
improvements for the legacy removal + wide_int conversion.
I think this approach is a good alternative, while providing us with
flexibility going forward. For example, we could try defaulting to a
8 sub-ranges for a noticeable improvement in VRP. We could also use
large sub-ranges for switch analysis to avoid resizing.
Another approach I tried was always resizing. With this, we could
drop the whole int_range<N> nonsense, and have irange just hold a
resizable range. This simplified things, but incurred a 7% penalty on
ipa_cp. This was hard to pinpoint, and I'm not entirely convinced
this wasn't some artifact of valgrind. However, until we're sure,
let's avoid massive changes, especially since IPA changes are coming
up.
For the curious, a particular hot spot for IPA in this area was:
ipcp_vr_lattice::meet_with_1 (const value_range *other_vr)
{
...
...
value_range save (m_vr);
m_vr.union_ (*other_vr);
return m_vr != save;
}
The problem isn't the resizing (since we do that at most once) but the
fact that for some functions with lots of callers we end up a huge
range that gets copied and compared for every meet operation. Maybe
the IPA algorithm could be adjusted somehow??.
Anywhooo... for now there is nothing to worry about, since value_range
still has 2 subranges and is not resizable. But we should probably
think what if anything we want to do here, as I envision IPA using
infinite ranges here (well, int_range_max) and handling frange's, etc.
gcc/ChangeLog:
PR tree-optimization/109695
* value-range.cc (irange::operator=): Resize range.
(irange::union_): Same.
(irange::intersect): Same.
(irange::invert): Same.
(int_range_max): Default to 3 sub-ranges and resize as needed.
* value-range.h (irange::maybe_resize): New.
(~int_range): New.
(int_range::int_range): Adjust for resizing.
(int_range::operator=): Same.
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irange::union_ was being overly pessimistic in its return value. It
was returning false when the nonzero mask was possibly the same.
The reason for this is because the nonzero mask is not entirely kept
up to date. We avoid setting it up when a new range is set (from a
set, intersect, union, etc), because calculating a mask from a range
is measurably expensive. However, irange::get_nonzero_bits() will
always return the correct mask because it will calculate the nonzero
mask inherit in the mask on the fly and bitwise or it with the saved
mask. This was an optimization because last release it was a big
penalty to keep the mask up to date. This may not necessarily be the
case with the conversion to wide_int's. We should investigate.
Just to be clear, the result from get_nonzero_bits() is always correct
as seen by the user, but the wide_int in the irange does not contain
all the information, since part of the nonzero bits can be determined
by the range itself, on the fly.
The fix here is to make sure that the result the user sees (callers of
get_nonzero_bits()) changed when unioning bits. This allows
ipcp_vr_lattice::meet_with_1 to avoid unnecessary copies when
determining if a range changed.
This patch yields an 6.89% improvement to the ipa_cp pass. I'm
including the IPA changes in this patch, as it's a testcase of sorts for
the change.
gcc/ChangeLog:
* ipa-cp.cc (ipcp_vr_lattice::meet_with_1): Avoid unnecessary
range copying
* value-range.cc (irange::union_nonzero_bits): Return TRUE only
when range changed.
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This adds the feature-test macro for PR0849R8, as per
https://github.com/cplusplus/CWG/issues/281.
gcc/c-family/ChangeLog:
* c-cppbuiltin.cc (c_cpp_builtins): Predefine __cpp_auto_cast
for C++23.
gcc/testsuite/ChangeLog:
* g++.dg/cpp23/feat-cxx2b.C: Test __cpp_auto_cast.
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Since we are going to have fixed-point intrinsics that are modeling
rounding mode
https://github.com/riscv-non-isa/rvv-intrinsic-doc/pull/222
We should have operand to specify rounding mode in fixed-point instructions.
We don't support these modeling rounding mode intrinsics yet but we will
definetely support them later.
This is the preparing patch for new coming intrinsics.
gcc/ChangeLog:
* config/riscv/riscv-protos.h (enum vxrm_field_enum): New enum.
* config/riscv/riscv-vector-builtins.cc
(function_expander::use_exact_insn): Add default rounding mode operand.
* config/riscv/riscv.cc (riscv_hard_regno_nregs): Add VXRM_REGNUM.
(riscv_hard_regno_mode_ok): Ditto.
(riscv_conditional_register_usage): Ditto.
* config/riscv/riscv.h (DWARF_FRAME_REGNUM): Ditto.
(VXRM_REG_P): Ditto.
(RISCV_DWARF_VXRM): Ditto.
* config/riscv/riscv.md: Ditto.
* config/riscv/vector.md: Ditto
Signed-off-by: Juzhe-Zhong <juzhe.zhong@rivai.ai>
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We (RVV) is going to add a rounding mode operand into floating-point
instructions which have 11 operands.
Since we are going have intrinsic that is adding rounding mode argument:
https://github.com/riscv-non-isa/rvv-intrinsic-doc/pull/226
This is the patch that is adding rounding mode operand in RISC-V port:
https://gcc.gnu.org/pipermail/gcc-patches/2023-May/618573.html
You can see there are 11 operands in these patterns.
gcc/ChangeLog:
* optabs.cc (maybe_gen_insn): Add case to generate instruction
that has 11 operands.
Signed-off-by: Juzhe-Zhong <juzhe.zhong@rivai.ai>
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The non-atomic path does not have range information,
we have to adjust the assert handle that case, too.
libgcc/ChangeLog:
* unwind-dw2-fde.c: Fix assert in non-atomic path.
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