Yannick Moy [Thu, 23 Mar 2023 14:45:09 +0000 (15:45 +0100)]
ada: Complete contracts of SPARK units
SPARK units in the standard library (both Ada and GNAT ones) should have
subprograms correctly annotated with contracts, so that a SPARK subprogram
should always return (not fail or raise an exception) under the conditions
expressed in its precondition, unless it is a procedure annotated with
Might_Not_Return.
gcc/ada/
* libgnat/a-calend.ads: Mark with SPARK_Mode=>Off the functions which may
raise Time_Error.
* libgnat/a-ngelfu.ads: Mark with SPARK_Mode=>Off the functions which may
lead to an overflow (which is not the case of Tan with one parameter for
example, or Arctanh or Arcoth, despite their mathematical range covering
the reals).
* libgnat/a-textio.ads: Remove Always_Return annotation from functions, as
this is now compulsory for functions to always return in SPARK.
* libgnat/i-cstrin.ads: Add Might_Not_Return annotation to Update procedure
which may not return.
Bob Duff [Mon, 27 Mar 2023 22:07:17 +0000 (18:07 -0400)]
ada: Fix crash on 'Img as generic actual function
'Image is allowed as an actual for a generic formal function.
This patch fixes a crash when 'Img is used instead of 'Image
in that context.
Misc cleanups.
gcc/ada/
* exp_put_image.adb (Build_Image_Call): Treat 'Img the same as
'Image.
* exp_imgv.adb (Expand_Image_Attribute): If Discard_Names, expand
to 'Image instead of 'Img.
* snames.ads-tmpl, par-ch4.adb, sem_attr.adb, sem_attr.ads:
Cleanups: Rename Attribute_Class_Array to be Attribute_Set. Remove
unnecessary qualifications. DRY: Don't repeat "True".
Piotr Trojanek [Wed, 29 Mar 2023 07:36:39 +0000 (09:36 +0200)]
ada: Remove redundant guard against empty lists
There is no need to guard against routine Contains being called on
No_Elist, because it will return False. Code cleanup related to handling
of primitive operations in GNATprove; semantics is unaffected.
Eric Botcazou [Sun, 26 Mar 2023 22:55:08 +0000 (00:55 +0200)]
ada: Fix double free on finalization of Vector in array aggregate
The handling of finalization is delicate during the expansion of aggregates
since the generated assignments must not cause the finalization of the RHS.
That's why the No_Ctrl_Actions flag is set on them and the adjustments are
generated manually.
This was not done in the case of an array of array with controlled component
when its subaggregates are not expanded in place but instead are replaced by
temporaries, leading to double free or memory corruption.
gcc/ada/
* exp_aggr.adb (Initialize_Array_Component): Remove obsolete code.
(Expand_Array_Aggregate): In the case where a temporary is created
and the parent is an assignment statement with No_Ctrl_Actions set,
set Is_Ignored_Transient on the temporary.
Eric Botcazou [Sat, 25 Mar 2023 20:42:11 +0000 (21:42 +0100)]
ada: Fix internal error on Big_Integer conversion ghost instance
The problem is that the ghost mode of the instance is used to analyze the
parent of the generic body, whose own ghost mode has nothing to do with it.
gcc/ada/
* sem_ch12.adb (Instantiate_Package_Body): Set the ghost mode to
that of the instance only after loading the generic's parent.
(Instantiate_Subprogram_Body): Likewise.
Piotr Trojanek [Thu, 23 Mar 2023 20:00:54 +0000 (21:00 +0100)]
ada: Cleanup expansion of membership operators into attribute Valid
Code cleanup; semantics is unaffected.
gcc/ada/
* exp_ch4.adb (Is_OK_Object_Reference): Replace loop with a call to
Unqual_Conv; consequently, change object from variable to constant;
replace an IF statement with an AND THEN expression.
Piotr Trojanek [Thu, 23 Mar 2023 19:15:19 +0000 (20:15 +0100)]
ada: Remove leftover code for counting protected entries
We used to count protected entries by iterating over component
declarations, but then switched to iterating over entities and
left some code that is no longer needed. Cleanup; semantics is
unaffected (maybe except fixing an assertion failure in developer
builds when there is pragma among entry family declarations).
gcc/ada/
* exp_ch9.adb
(Build_Entry_Count_Expression): Remove loop over component declaration;
consequently remove a parameter that is no longer used; adapt callers.
(Make_Task_Create_Call): Refine type of a local variable.
Eric Botcazou [Thu, 23 Mar 2023 13:35:57 +0000 (14:35 +0100)]
ada: Reorder components in Ada.Containers.Restricted_Doubly_Linked_Lists
An instantiation of the package compiled with -gnatw.q yields:
warning: in instantiation at a-crdlli.ads:317 [-gnatw.q]
warning: record layout may cause performance issues [-gnatw.q]
warning: in instantiation at a-crdlli.ads:317 [-gnatw.q]
warning:
component "Nodes" whose length depends on a discriminant [-gnatw.q]
warning: in instantiation at a-crdlli.ads:317 [-gnatw.q]
warning: comes too early and was moved down [-gnatw.q]
gcc/ada/
* libgnat/a-crdlli.ads (List): Move Nodes component to the end.
Eric Botcazou [Sun, 5 Mar 2023 17:30:34 +0000 (18:30 +0100)]
ada: Reject thin 'Unrestricted_Access value to aliased constrained array
This rejects the Unrestricted_Access attribute applied to an aliased array
with a constrained nominal subtype when its type is resolved to be a thin
pointer. The reason is that supporting this case would require the aliased
array to contain its bounds, and this is the case only for aliased arrays
whose nominal subtype is unconstrained.
gcc/ada/
* sem_attr.adb (Is_Thin_Pointer_To_Unc_Array): New predicate.
(Resolve_Attribute): Apply the static matching legality rule to an
Unrestricted_Access attribute applied to an aliased prefix if the
type is a thin pointer. Call Is_Thin_Pointer_To_Unc_Array for the
aliasing legality rule as well.
Piotr Trojanek [Tue, 5 Oct 2021 13:29:44 +0000 (15:29 +0200)]
ada: Fix handling of Global contracts inside generic subprograms
Routine Get_Argument works differently for generic units (as explained
in its comment), but it failed to reliably detect such units when their
kind is temporarily made non-generic (for resolving recursive calls, as
explained in the comment at the end of Is_Generic_Declaration_Or_Body).
With this patch the frontend will look at the decorated expression of
the Global contract attached to the Global aspect; previously it was
looking at the undecorated expression attached to the corresponding
pragma.
gcc/ada/
* sem_prag.adb (Get_Argument): Improve detection of generic units.
Piotr Trojanek [Fri, 17 Mar 2023 13:10:03 +0000 (14:10 +0100)]
ada: Cleanups in handling of aggregates
Assorted cleanups related to recent fixes of aggregate handling for
GNATprove; semantics is unaffected.
gcc/ada/
* sem_aggr.adb
(Resolve_Record_Aggregate): Remove useless assignment.
* sem_aux.adb
(Has_Variant_Part): Remove useless guard; this routine is only called
on type entities (and now will crash in other cases).
* sem_ch3.adb
(Create_Constrained_Components): Only assign Assoc_List when necessary;
tune whitespace.
(Is_Variant_Record): Refactor repeated calls to Parent.
* sem_util.adb
(Gather_Components): Assert that discriminant association has just one
choice in component_association; refactor repeated calls to Next.
* sem_util.ads
(Gather_Components): Tune whitespace in comment.
Piotr Trojanek [Tue, 21 Mar 2023 08:46:57 +0000 (09:46 +0100)]
ada: Fix iteration over component items with pragmas
Component items in a record declaration might include pragmas, which
must be ignored when detecting components with default expressions.
More a code cleanup than a bugfix, as it only affects artificial corner
cases. Found while fixing missing legality checks for variant component
declarations.
gcc/ada/
* sem_ch3.adb (Check_CPP_Type_Has_No_Defaults): Iterate with
First_Non_Pragma and Next_Non_Pragma.
* exp_dist.adb (Append_Record_Traversal): Likewise.
Eric Botcazou [Sat, 18 Mar 2023 23:24:54 +0000 (00:24 +0100)]
ada: Remove Is_Descendant_Of_Address flag from Standard_Address
It breaks the Allow_Integer_Address special mode.
Add new standard_address parameters to gigi and alphabetize others, this is
necessary when addresses are not treated like integers.
gcc/ada/
* back_end.adb (Call_Back_End): Add gigi_standard_address to the
signature of the gigi procedure and alphabetize other parameters.
Pass Standard_Address as actual parameter for it.
* cstand.adb (Create_Standard): Do not set Is_Descendant_Of_Address
on Standard_Address.
* gcc-interface/gigi.h (gigi): Add a standard_address parameter and
alphabetize others.
* gcc-interface/trans.cc (gigi): Likewise. Record a builtin address
type and save it as the type for Standard.Address.
Piotr Trojanek [Thu, 16 Mar 2023 09:39:37 +0000 (10:39 +0100)]
ada: Use context variables in expansion of aggregates
Code cleanup; semantics is unaffected.
gcc/ada/
* exp_aggr.adb
(Build_Constrained_Type): Remove local constants that were shadowing
equivalent global constants; replace a wrapper that calls
Make_Integer_Literal with a numeric literal; remove explicit
Aliased_Present parameter which is equivalent to the default value.
(Check_Bounds): Remove unused initial value.
(Expand_Array_Aggregate): Use aggregate type from the context.
Eric Botcazou [Fri, 3 Mar 2023 19:34:09 +0000 (20:34 +0100)]
ada: Fix missing finalization in library-level instance body
This extends the delaying mechanism present in the cases where the instance
is not at library level, so as to wait until after the instantiation of the
body is performed, before generating the finalizer of the compilation unit.
gcc/ada/
* einfo.ads (Delay_Cleanups): Document new usage.
* exp_ch7.ads (Build_Finalizer): New declaration.
* exp_ch7.adb (Build_Finalizer.Process_Declarations): Do not treat
library-level package instantiations specially.
(Build_Finalizer): Return early for package bodies and specs that
are not compilation units instead of using a more convoluted test.
(Expand_N_Package_Body): Do not build a finalizer if Delay_Cleanups
is set on the defining entity.
(Expand_N_Package_Declaration): Likewise.
* inline.ads (Pending_Body_Info): Reorder and add Fin_Scop.
(Add_Pending_Instantiation): Add Fin_Scop parameter.
* inline.adb (Add_Pending_Instantiation): Likewise and copy it into
the Pending_Body_Info appended to Pending_Instantiations.
(Add_Scope_To_Clean): Change parameter name to Scop and remove now
irrelevant processing.
(Cleanup_Scopes): Deal with scopes that are package specs or bodies.
(Instantiate_Body): For package instantiations, deal specially with
scopes that are package bodies and with scopes that are dynamic.
Pass the resulting scope to Add_Scope_To_Clean directly.
* sem_ch12.adb (Analyze_Package_Instantiation): In the case where a
body is needed, compute the enclosing finalization scope and pass it
in the call to Add_Pending_Instantiation.
(Inline_Instance_Body): Adjust aggregate passed in the calls to
Instantiate_Package_Body.
(Load_Parent_Of_Generic): Likewise.
Eric Botcazou [Wed, 15 Mar 2023 12:56:33 +0000 (13:56 +0100)]
ada: Fix another couple of unchecked conversions to Ada.Tags.Tag
They are problematic on platforms where the provenance of pointers must be
tracked throughout their lifetime.
gcc/ada/
* exp_sel.adb: Add clauses for Sem_Util, remove them for Opt, Sinfo
and Sinfo.Nodes.
(Build_K): Always use 'Tag of the object.
(Build_S_Assignment): Likewise.
Piotr Trojanek [Wed, 1 Feb 2023 20:47:32 +0000 (21:47 +0100)]
ada: Refine types for an accessibility-checking routine
Code cleanup related to work on expression functions for GNATprove
(which require accessibility checks even when they are not expanded
and thus have no explicit return statements).
gcc/ada/
* accessibility.adb
(Is_Formal_Of_Current_Function): This routine expects an entity
reference and not the entity itself, so its parameter is a Node_Id
and not an Entity_Id.
Eric Botcazou [Mon, 13 Mar 2023 11:03:47 +0000 (12:03 +0100)]
ada: Enhance Is_Null_Range and Not_Null_Range predicates
Both predicates bail out if the bounds of the range are not known at compile
time, whereas Compile_Time_Compare can deal with them in specific cases.
gcc/ada/
* sem_eval.ads (Is_Null_Range): Remove requirements of compile-time
known bounds and add WARNING line.
(Not_Null_Range): Remove requirements of compile-time known bounds.
* sem_eval.adb (Is_Null_Range): Fall back to Compile_Time_Compare.
(Not_Null_Range): Likewise.
* fe.h (Is_Null_Range): New predicate.
liuhongt [Tue, 16 May 2023 02:36:16 +0000 (10:36 +0800)]
Only use NO_REGS in cost calculation when !hard_regno_mode_ok for GENERAL_REGS and mode.
r14-172-g0368d169492017 replaces GENERAL_REGS with NO_REGS in cost
calculation when the preferred register class are not known yet.
It regressed powerpc PR109610 and PR109858, it looks too aggressive to use
NO_REGS when mode can be allocated with GENERAL_REGS.
The patch takes a step back, still use GENERAL_REGS when
hard_regno_mode_ok for mode and GENERAL_REGS, otherwise uses NO_REGS.
gcc/ChangeLog:
PR target/109610
PR target/109858
* ira-costs.cc (scan_one_insn): Only use NO_REGS in cost
calculation when !hard_regno_mode_ok for GENERAL_REGS and
mode, otherwise still use GENERAL_REGS.
Jonathan Wakely [Thu, 25 May 2023 20:17:19 +0000 (21:17 +0100)]
libstdc++: Add relational operators to __gnu_test::PointerBase
The Cpp17Allocator requirements say that an allocator's pointer and
const_pointer types must meet the Cpp17RandomAccessIterator
requirements. That means our PointerBase helper for defining fancy
pointer types should support the full set of relational operators.
Uros Bizjak [Thu, 25 May 2023 17:40:26 +0000 (19:40 +0200)]
i386: Use 2x-wider modes when emulating QImode vector instructions
Rewrite ix86_expand_vecop_qihi2 to expand fo 2x-wider (e.g. V16QI -> V16HImode)
instructions when available. Currently, the compiler generates following
assembly for V16QImode multiplication (-mavx2):
Patched compiler generates more optimized code involving multiplication
in 2x-wider mode in cases where missing truncate instruction has to be
emulated with a permutation (-mavx2):
The patch also adjusts cost calculation of V*QImode emulations to account
for generation of 2x-wider mode instructions.
gcc/ChangeLog:
* config/i386/i386-expand.cc (ix86_expand_vecop_qihi2):
Rewrite to expand to 2x-wider (e.g. V16QI -> V16HImode)
instructions when available. Emulate truncation via
ix86_expand_vec_perm_const_1 when native truncate insn
is not available.
(ix86_expand_vecop_qihi_partial) <case MULT>: Use pmovzx
when available. Trivially rename some variables.
(ix86_expand_vecop_qihi): Unconditionally call ix86_expand_vecop_qihi2.
* config/i386/i386.cc (ix86_multiplication_cost): Rewrite cost
calculation of V*QImode emulations to account for generation of
2x-wider mode instructions.
(ix86_shift_rotate_cost): Update cost calculation of V*QImode
emulations to account for generation of 2x-wider mode instructions.
Georg-Johann Lay [Tue, 23 May 2023 12:54:12 +0000 (14:54 +0200)]
target/104327: Allow more inlining between different optimization levels.
avr-common.cc introduces the following options that are set depending
on optimization level: -mgas-isr-prologues, -mmain-is-OS-task and
-fsplit-wide-types-early. The inliner thinks that different options
disallow cross-optimization inlining, so provide can_inline_p.
gcc/
PR target/104327
* config/avr/avr.cc (avr_can_inline_p): New static function.
(TARGET_CAN_INLINE_P): Define to that function.
Georg-Johann Lay [Thu, 25 May 2023 17:02:34 +0000 (19:02 +0200)]
target/82931: Make a pattern more generic to match more bit-transfers.
There is already a pattern in avr.md that matches single-bit transfers
from one register to another one, but it only handled bit 0 of 8-bit
registers. This change makes that pattern more generic so it matches
more of similar single-bit transfers.
gcc/
PR target/82931
* config/avr/avr.md (*movbitqi.0): Rename to *movbit<mode>.0-6.
Handle any bit position and use mode QISI.
* config/avr/avr.cc (avr_rtx_costs_1) [IOR]: Return a cost
of 2 insns for bit-transfer of respective style.
gcc/testsuite/
PR target/82931
* gcc.target/avr/pr82931.c: New test.
Ju-Zhe Zhong [Thu, 25 May 2023 14:42:35 +0000 (22:42 +0800)]
VECT: Add decrement IV iteration loop control by variable amount support
This patch is supporting decrement IV by following the flow designed by
Richard:
(1) In vect_set_loop_condition_partial_vectors, for the first iteration of:
call vect_set_loop_controls_directly.
(2) vect_set_loop_controls_directly calculates "step" as in your patch.
If rgc has 1 control, this step is the SSA name created for that
control. Otherwise the step is a fresh SSA name, as in your patch.
(3) vect_set_loop_controls_directly stores this step somewhere for later
use, probably in LOOP_VINFO. Let's use "S" to refer to this stored
step.
(4) After the vect_set_loop_controls_directly call above, and outside
the "if" statement that now contains vect_set_loop_controls_directly,
check whether rgc->controls.length () > 1. If so, use
vect_adjust_loop_lens_control to set the controls based on S.
Then the only caller of vect_adjust_loop_lens_control is
vect_set_loop_condition_partial_vectors. And the starting
step for vect_adjust_loop_lens_control is always S.
This patch has well tested for single-rgroup and multiple-rgroup (SLP)
and passed all testcase in RISC-V port.
Signed-off-by: Ju-Zhe Zhong <juzhe.zhong@rivai.ai> Co-Authored-By: Richard Sandiford <richard.sandiford@arm.com>
gcc/ChangeLog:
* tree-vect-loop-manip.cc (vect_adjust_loop_lens_control): New
function.
(vect_set_loop_controls_directly): Add decrement IV support.
(vect_set_loop_condition_partial_vectors): Ditto.
* tree-vect-loop.cc (_loop_vec_info::_loop_vec_info): New
variable.
* tree-vectorizer.h (LOOP_VINFO_USING_DECREMENTING_IV_P): New
macro.
gcc/testsuite/ChangeLog:
* gcc.target/riscv/rvv/autovec/partial/multiple_rgroup-3.c: New test.
* gcc.target/riscv/rvv/autovec/partial/multiple_rgroup-4.c: New test.
* gcc.target/riscv/rvv/autovec/partial/multiple_rgroup_run-3.c: New test.
* gcc.target/riscv/rvv/autovec/partial/multiple_rgroup_run-4.c: New test.
Kyrylo Tkachov [Thu, 25 May 2023 14:00:16 +0000 (15:00 +0100)]
aarch64: PR target/99195 Annotate complex FP patterns for vec-concat-zero
This patch annotates the complex add and mla patterns for vec-concat-zero.
Testing showed an interesting bug in our MD patterns where they were defined to match:
(plus:VHSDF (match_operand:VHSDF 1 "register_operand" "0")
(unspec:VHSDF [(match_operand:VHSDF 2 "register_operand" "w")
(match_operand:VHSDF 3 "register_operand" "w")
(match_operand:SI 4 "const_int_operand" "n")]
FCMLA))
but the canonicalisation rules for PLUS require the more "complex" operand to be first so
during combine when the new substituted patterns were attempted to be formed combine/recog would
try to match:
(plus:V2SF (unspec:V2SF [
(reg:V2SF 100)
(reg:V2SF 101)
(const_int 0 [0])
] UNSPEC_FCMLA270)
(reg:V2SF 99))
instead. This patch fixes the operands of the PLUS RTX in these patterns.
Similar patterns for the dot-product instructions already used the right order.
Bootstrapped and tested on aarch64-none-linux-gnu and aarch64_be-none-elf.
gcc/ChangeLog:
PR target/99195
* config/aarch64/aarch64-simd.md (aarch64_fcadd<rot><mode>): Rename to...
(aarch64_fcadd<rot><mode><vczle><vczbe>): ... This.
Fix canonicalization of PLUS operands.
(aarch64_fcmla<rot><mode>): Rename to...
(aarch64_fcmla<rot><mode><vczle><vczbe>): ... This.
Fix canonicalization of PLUS operands.
(aarch64_fcmla_lane<rot><mode>): Rename to...
(aarch64_fcmla_lane<rot><mode><vczle><vczbe>): ... This.
Fix canonicalization of PLUS operands.
(aarch64_fcmla_laneq<rot>v4hf): Rename to...
(aarch64_fcmla_laneq<rot>v4hf<vczle><vczbe>): ... This.
Fix canonicalization of PLUS operands.
(aarch64_fcmlaq_lane<rot><mode>): Fix canonicalization of PLUS operands.
gcc/testsuite/ChangeLog:
PR target/99195
* gcc.target/aarch64/simd/pr99195_9.c: New test.
Chris Sidebottom [Thu, 25 May 2023 13:57:34 +0000 (14:57 +0100)]
arm: Implement ACLE Data Intrinsics
This patch implements a number of scalar data processing intrinsics from ACLE
that were requested by some users. Some of these have fast single-instruction
sequences for Armv6 and later, but even for earlier versions they can still emit
an inline sequence or a call to libgcc (and ACLE recommends them being unconditionally
available).
Chris Sidebottom wrote most of the patch, I just cleaned it up, wired up some builtins
and adjusted the tests.
Bootstrapped and tested on arm-none-linux-gnueabihf.
Co-authored-by: Chris Sidebottom <chris.sidebottom@arm.com>
gcc/ChangeLog:
* gcc.target/arm/acle/data-intrinsics-armv6.c: New test.
* gcc.target/arm/acle/data-intrinsics-assembly.c: New test.
* gcc.target/arm/acle/data-intrinsics-rbit.c: New test.
* gcc.target/arm/acle/data-intrinsics.c: New test.
where M1 and M2 are of equal mode size. That is problematic for the splitter
vfp.md:no_literal_pool_df_immediate in the arm backend, which tries to pun an
lvalue DFmode pseudo into DImode and assign a constant to it with
emit_move_insn, as the new transformation simply undoes this, and we end up
splitting indefinitely.
This patch changes things around in the arm backend so that we use a
DImode temporary (instead of DFmode) and first load the DImode constant
into the pseudo, and then pun the pseudo into DFmode as an rvalue in a
reg -> reg move. I believe this should be semantically equivalent but
avoids the pathalogical behaviour seen in the PR.
gcc/ChangeLog:
PR target/109800
* config/arm/arm.md (movdf): Generate temporary pseudo in DImode
instead of DFmode.
* config/arm/vfp.md (no_literal_pool_df_immediate): Rather than punning an
lvalue DFmode pseudo into DImode, use a DImode pseudo and pun it into
DFmode as an rvalue.
gcc/testsuite/ChangeLog:
PR target/109800
* gcc.target/arm/pure-code/pr109800.c: New test.
Richard Biener [Thu, 25 May 2023 10:55:11 +0000 (12:55 +0200)]
target/109955 - handle pattern generated COND_EXPR without vcond
The following properly handles pattern matching generated COND_EXPRs
which can still have embedded compares in vectorizable_condition
which will always code generate the masked vector variant. We
were requiring vcond with embedded comparisons instead of also
allowing (as code generated) split compare and VEC_COND_EXPR.
This fixes some of the fallout when removing vcond{,u,eq} expanders
from the x86 backend.
PR target/109955
* tree-vect-stmts.cc (vectorizable_condition): For
embedded comparisons also handle the case when the target
only provides vec_cmp and vcond_mask.
arc: Make TLS Local Dynamic work like Global Dynamic model
Current ARC's TLS Local Dynamic model is using two anchors to access
data, namely `.tdata` and `.tbss`. This implementation is unnecessary
complicated. However, the TLS Local Dynamic model has better results
using Global Dynamic model and anchors.
gcc/ChangeLog;
* config/arc/arc.cc (arc_call_tls_get_addr): Simplify access using
TLS Local Dynamic.
Kyrylo Tkachov [Thu, 25 May 2023 08:48:33 +0000 (09:48 +0100)]
aarch64: Implement vector FP absolute compare intrinsics with builtins
While optimising some vector math library code with intrinsics we stumbled upon the issue in the testcase.
The compiler should be generating a FACGT instruction but instead we generate:
foo(__Float32x4_t, __Float32x4_t, __Float32x4_t):
fabs v0.4s, v0.4s
adrp x0, .LC0
ldr q31, [x0, #:lo12:.LC0]
fcmgt v0.4s, v0.4s, v31.4s
ret
This is because the vcagtq_f32 intrinsic is open-coded in arm_neon.h as
return vabsq_f32 (__a) > vabsq_f32 (__b)
thus relying on the optimisers to merge it back together. But since one of the arms of the comparison
is a vector constant the combine pass optimises the abs into it and tries matching:
(set (reg:V4SI 101)
(neg:V4SI (gt:V4SI (reg:V4SF 100)
(const_vector:V4SF [
(const_double:SF 1.0e+2 [0x0.c8p+7]) repeated x4
]))))
and
(set (reg:V4SI 101)
(neg:V4SI (gt:V4SI (abs:V4SF (reg:V4SF 104))
(reg:V4SF 103))))
instead of what we want:
(insn 13 9 14 2 (set (reg/i:V4SI 32 v0)
(neg:V4SI (gt:V4SI (abs:V4SF (reg:V4SF 98))
(abs:V4SF (reg:V4SF 96)))))
I don't really see a good way around that with our current implementation of these intrinsics.
Therefore this patch reimplements these intrinsics with aarch64 builtins that generate the RTL for these
instructions directly. Apparently we already had them defined in aarch64-simd-builtins.def and have been
using them for the fp16 case already.
I realise that this approach is against the general principle of expressing intrinsics in the higher-level constructs,
so I'm willing to listen to counter-arguments.
That said, the FACGT/FACGE instructions are as fast as the non-ABS comparison instructions on all microarchitectures that I know of
so it should always be a win to have them in the merged form rather than split the fabs step separately or try to hoist it.
And the testcase does come from real library code that we're trying to optimise.
With this patch for the testcase we generate:
foo:
adrp x0, .LC0
ldr q31, [x0, #:lo12:.LC0]
facgt v0.4s, v0.4s, v31.4s
ret
Javier Miranda [Tue, 28 Feb 2023 18:20:38 +0000 (18:20 +0000)]
ada: Missing warning on null-excluding array aggregate component
The compiler does not report warnings on the initialization
of arrays of null-excluding access type components by means
of iterated component association, when the expression
initializing each component is either a conditional
expression or a case expression that may initialize
some component with a null value.
gcc/ada/
* sem_aggr.adb
(Warn_On_Null_Component_Association): New subprogram.
(Empty_Range): Adding missing support for iterated component
association node.
(Resolve_Array_Aggregate): Report warning on iterated component
association that may initialize some component of an array of
null-excluding access type components with a null value.
* exp_ch4.adb
(Expand_N_Expression_With_Actions): Add missing type check since
the subtype of the EWA node and the subtype of the expression
may differ.
Tom Tromey [Wed, 8 Mar 2023 17:21:59 +0000 (10:21 -0700)]
ada: Require successful build of xsnamest
While experimenting, I introduced a compilation error into xsnamest.
This took a little while to track down because, while the error was in
the log, the build did not stop. This patch changes Make-generated.in
to require a successful build of this program.
gcc/ada/
* Make-generated.in (ada/stamp-snames): Check result of
gnatmake.
Eric Botcazou [Wed, 8 Mar 2023 22:02:34 +0000 (23:02 +0100)]
ada: Minor adjustments to Standard_Address
Standard_Address is an internal entity that is meant to be a clone of
System.Address built at compilation startup. It needs to be seen as a
bona-fide address by the code generator. For the sake of completeness,
it is also given its modulus, although this does not matter in practice.
gcc/ada/
* cstand.adb (Create_Standard): Set the Is_Descendant_Of_Address
flag on Standard_Address.
* freeze.adb (Freeze_Entity): Copy the modulus of System.Address
onto Standard_Address.
Eric Botcazou [Wed, 8 Mar 2023 17:11:31 +0000 (18:11 +0100)]
ada: Add size clause to System.Address
Standard'Address_Size is the value provided by the code generator for the
size of pointers, and it is set as the default size of every thin pointer
by the front-end. Now it is documented in the GNAT RM as having the value
of System.Address'Size, which is indeed the case on (correctly configured)
platforms where pointers contain exactly the number of bits that are needed
to address the memory space.
However, on platforms where pointers contain additional bits of metadata,
it has a larger value and the documented relation does not hold, which also
means that unchecked conversions between System.Address and pointers are
seen as potentially problematic. In order to fix the discrepancy on these
platforms, this change adds the obvious size clause to System.Address, which
is confirming on all the other (correctly configured) platforms.
Bob Duff [Wed, 8 Mar 2023 17:15:13 +0000 (12:15 -0500)]
ada: Switch from E_Void to Is_Not_Self_Hidden
We had previously used Ekind = E_Void to indicate that a declaration is
self-hidden. We now use the Is_Not_Self_Hidden flag instead. This allows
us to avoid many "vanishing fields", which are (possibly-latent) bugs,
and we now enable the assertions in Atree that detect such bugs.
gcc/ada/
* atree.adb (Check_Vanishing_Fields): Fix bug in the "blah type
only" cases. Remove the special cases for E_Void. Misc cleanup.
(Mutate_Nkind): Disallow mutating to the same kind.
(Mutate_Ekind): Disallow mutating to E_Void.
(From E_Void is still OK -- entities start out as E_Void by
default.) Fix bug in statistics gathering -- was setting the wrong
count. Enable Check_Vanishing_Fields for entities.
* sem_ch8.adb (Is_Self_Hidden): New function.
(Find_Direct_Name): Call Is_Self_Hidden to use the new
Is_Not_Self_Hidden flag to determine whether a declaration is
hidden from all visibility by itself. This replaces the old method
of checking E_Void.
(Find_Expanded_Name): Likewise.
(Find_Selected_Component): Likewise.
* sem_util.adb (Enter_Name): Remove setting of Ekind to E_Void.
* sem_ch3.adb: Set the Is_Not_Self_Hidden flag in appropriate
places. Comment fixes.
(Inherit_Component): Remove setting of Ekind to E_Void.
* sem_ch9.adb
(Analyze_Protected_Type_Declaration): Update comment. Skip Itypes,
which should not be turned into components.
* atree.ads (Mutate_Nkind): Document error case.
(Mutate_Ekind): Remove comments apologizing for E_Void mutations.
Document error cases.
Eric Botcazou [Wed, 8 Mar 2023 14:12:27 +0000 (15:12 +0100)]
ada: Decouple size of addresses and pointers from size of memory space
This decouples the size of the types representing addresses and pointers,
which is Standard'Address_Size, from the size of the memory space, which
is System.Memory_Size (more precisely log2 of it). They are tied through
the definition of System.Address:
type Address is mod Memory_Size;
so Standard'Address_Size >= log2 (System.Memory_Size) necessarily, but the
equality does not hold on platforms where addresses and pointers contain
additional bits of metadata.
gcc/ada/
* libgnat/a-ststio.adb (Set_Mode): Test System.Memory_Size.
* libgnat/g-debuti.ads (Address_64): Likewise.
* libgnat/i-c.ads: Add with clause for System.
(ptrdiff_t): Define based on the size of memory space.
(size_t): Likewise.
* libgnat/s-crtl.ads (size_t): Likewise.
(ssize_t): Likewise.
* libgnat/s-memory.ads (size_t): Likewise.
* libgnat/s-parame.ads (Size_Type): Likewise.
* libgnat/s-parame__hpux.ads (Size_Type): Likewise.
* libgnat/s-parame__posix2008.ads (Size_Type): Likewise.
* libgnat/s-parame__vxworks.ads (Size_Type): Likewise.
* libgnat/s-putima.adb (Signed_Address): Likewise.
(Unsigned_Address): Likewise.
* libgnat/s-stoele.ads (Storage_Offset): Likewise.
Piotr Trojanek [Wed, 8 Mar 2023 14:30:41 +0000 (15:30 +0100)]
ada: Fix copying of quantified expressions
While visiting the AST as part of routine New_Copy_Tree we maintain
an EWA_Level variable in a stack-like fashion. This worked fine for
expression with actions nodes but not for quantified expressions.
gcc/ada/
* sem_util.adb (Visit_Node): Decrement EWA_Level with the same condition
as when it was incremented.
Piotr Trojanek [Wed, 8 Mar 2023 10:41:42 +0000 (11:41 +0100)]
ada: Deconstruct a no longer used parameter of New_Copy_Tree
Parameter Scopes_In_EWA_OK of New_Copy_Tree was introduced in 2018 to
deal with expressions-with-actions (EWA) in the build-in-place
machinery. However, after changes made in 2022 it is no longer used by
any caller.
Cleanup related to handling of expression functions in GNATprove;
semantics is unaffected.
gcc/ada/
* sem_util.ads (New_Copy_Tree): Remove Scopes_In_EWA_OK from spec;
adapt comment.
* sem_util.adb (New_Copy_Tree): Remove Scopes_In_EWA_OK from body;
adapt code.
Piotr Trojanek [Tue, 7 Mar 2023 18:52:40 +0000 (19:52 +0100)]
ada: Simplify copying of node lists
When creating a copy of a node list we called Copy_Entity for entities
and Copy_Separate_Tree for other nodes. This was unnecessary, because
the Copy_Separate_Tree when called on entities will just do Copy_Entity.
Code cleanup; semantics is unaffected.
gcc/ada/
* atree.adb (Copy_List): Call Copy_Separate_Tree for both entities and
other nodes.
Steve Baird [Fri, 3 Mar 2023 00:51:57 +0000 (16:51 -0800)]
ada: Avoid duplicated streaming subprograms
In some common cases, a reference to Some_Type'Some_Streaming_Attribute
causes the needed subprogram to be generated "on demand". If there are
multiple such references (e.g., two calls to Some_Type'Write) then we
want to avoid generating multiple essentially-identical subprograms.
This change implies that a generated streaming subprogram may now have
multiple call sites, so we can no longer use the source position information
from the (one and only) call site. If an exception is raised during a
streaming operation, this can make a difference in the reported raise location.
gcc/ada/
* exp_attr.adb
(Cached_Streaming_Ops): A new package, providing maps to save
previously-generated Read/Write/Input/Output procedures.
(Expand_N_Attribute_Reference): When a new subprogram is generated
for a Read/Write/Input/Output attribute reference, record that
type/subp pair in the appropriate Cached_Streaming_Ops map.
(Find_Stream_Subprogram): Check the appropriate
Cached_Streaming_Ops map to see if an appropriate subprogram has
already been generated. If so, then return it. The appropriateness
test includes a call to a new nested subprogram,
In_Available_Context.
* exp_strm.ads, exp_strm.adb: Do not pass in a Loc parameter (or a
source-location-bearing Nod parameter) to the 16 procedures
provided for building streaming-related subprograms. Use the
source location of the type instead.
* exp_dist.adb, exp_ch3.adb: Adapt to Exp_Strm spec changes. For
these calls the source location of the type was already being
used.
Marc Poulhiès [Tue, 7 Mar 2023 15:35:48 +0000 (16:35 +0100)]
ada: Fix crash during function return analysis
The compiler would crash when checking type relation between the
function's return type and the type of the expression used in the return
statement. It would not work if the function's return type is an access
type and the expression is not.
gcc/ada/
* sem_ch6.adb (Analyze_Function_Return): Add missing
Is_Access_Type check before accessing the Designated_Type field.
Marc Poulhiès [Mon, 6 Mar 2023 11:15:13 +0000 (12:15 +0100)]
ada: Fix (again) incorrect handling of Aggregate aspect
Previous fix stopped the processing of the Aggregate aspect early,
skipping the call to Record_Rep_Item, making later call to
Resolve_Container_Aggregate fail.
Also, the previous fix would not handle correctly the case where the
type is private and the check for non-array type can only be done at the
freeze point with the full type.
Adapt the resolving of the aspect when the input is not correct and the
parameters can't be resolved.
gcc/ada/
* sem_ch13.adb (Analyze_One_Aspect): Call Record_Rep_Item.
(Check_Aspect_At_Freeze_Point): Check the aspect is specified on
non-array type only...
(Analyze_One_Aspect): ... instead of doing it too early here.
* sem_aggr.adb (Resolve_Container_Aggregate): Do nothing in case
the parameters failed to resolve.
Piotr Trojanek [Sat, 4 Mar 2023 17:07:33 +0000 (18:07 +0100)]
ada: Fix comments for recently added SPARK aspects
Implementation of contract Subprogram_Variant and Exceptional_Cases was
based on the existing code for Contract_Cases, i.e. on the existing
occurrences of Aspect_Contract_Cases, Name_Contract_Cases and
Pragma_Contract_Cases. However, occurrences of "Contract_Cases" itself
in the comments were not updated.
gcc/ada/
* contracts.adb
(Add_Pre_Post_Condition): Mention new aspects in the comment.
* contracts.ads
(Add_Contract_Item): Likewise.
(Analyze_Subprogram_Body_Stub_Contract): Likewise.
* sem_prag.adb
(Contract_Freeze_Error): Likewise.
(Ensure_Aggregate_Form): Likewise.
* sem_prag.ads
(Find_Related_Declaration_Or_Body): Likewise.
* sinfo.ads
(Is_Generic_Contract_Pragma): Likewise.
Piotr Trojanek [Fri, 3 Mar 2023 16:45:20 +0000 (17:45 +0100)]
ada: Add missing supportive code for recently added SPARK aspects
Fix minor inconsistencies with the recently added SPARK aspects
Exceptional_Cases and Subprogram_Variant, whose implementation is based
on Contract_Cases.
gcc/ada/
* aspects.ads
(Implementation_Defined_Aspect): Recently added aspects are
implementation-defined, just like Contract_Cases.
* sem_prag.ads
(Aspect_Specifying_Pragma): Recently added aspects have corresponding
pragmas, just like Contract_Cases.
(Pragma_Significant_To_Subprograms): Recently added aspects are
significant to subprograms, just like Contract_Cases.
Piotr Trojanek [Mon, 6 Mar 2023 11:50:04 +0000 (12:50 +0100)]
ada: Tune handling of attributes Old in contract Exceptional_Cases
Contract Exceptional_Cases allows formal parameters to appear *in*
prefixes of attributes Old, but the code only allowed them to appear
*as* prefixes of those attributes.
For example, we now accetp expressions like "X.all'Old" that were
previously rejected.
gcc/ada/
* sem_res.adb (Resolve_Entity_Name): Tune handling of formal parameters
in contract Exceptional_Cases.
Eric Botcazou [Sat, 4 Mar 2023 14:02:32 +0000 (15:02 +0100)]
ada: Small tweak to implementation of by-copy semantics for storage models
Get_Actual_Subtype can be used to access the Actual_Designated_Subtype of
explicit dereferences with a storage model. As a side effect, this also
handles the case where the prefix of the dereference is a formal parameter.
gcc/ada/
* exp_ch6.adb (Add_Simple_Call_By_Copy_Code): Use Get_Actual_Subtype
to retrieve the actual subtype for all actuals and do it in only one
place for all unconstrained composite formal types.
This patch adds documentation to the subprogram Replace_Type in
Sem_Ch3. In particular, references to relevant parts of the Ada
reference manual are added.
gcc/ada/
* sem_ch3.adb (Replace_Type): Add more documentation.
This patch does not change the behavior of the compiler, but is
intended to improve readability. It seizes an opportunity to move
a variable declaration to a smaller scope, so that it's clearer
that the variable is not used outside of that scope.
gcc/ada/
* sem_ch3.adb (Replace_Type): Reduce span of variable.
Bob Duff [Fri, 3 Mar 2023 14:46:34 +0000 (09:46 -0500)]
ada: Set Is_Not_Self_Hidden flag in more cases
More work-in-progress for changing E_Void checks to the flag.
gcc/ada/
* sem_ch9.adb (Analyze_Protected_Type_Declaration): Set the flag
for protected types.
(Analyze_Single_Protected_Declaration): Likewise, for singleton
protected objects.
(Analyze_Task_Type_Declaration): Set the flag for task types.
(Analyze_Single_Task_Declaration): Likewise, for singleton task
objects.
* sem_ch10.adb (Decorate_Type): Set the flag for types treated as
incomplete.
(Build_Shadow_Entity): Set the flag for shadow entities.
(Decorate_State): Set the flag for an abstract state.
(Build_Limited_Views): Set the flag for limited view of package.
* sem_attr.adb (Check_Not_Incomplete_Type): Disable the check when
this is a current instance.
This patch improves the way controlling access parameters are
handled in dispatch table wrappers. The constructions of both the
specifications and the bodies of wrappers are modified.
gcc/ada/
* freeze.adb (Build_DTW_Body): Add appropriate type conversions for
controlling access parameters.
* sem_util.adb (Build_Overriding_Spec): Fix designated types in
controlling access parameters.
Bob Duff [Thu, 2 Mar 2023 15:12:29 +0000 (10:12 -0500)]
ada: Add Entry_Cancel_Parameter to E_Label
...and other (minor) changes.
gcc/ada/
* gen_il-gen-gen_entities.adb (E_Label): Add
Entry_Cancel_Parameter. This is necessary because
Analyze_Implicit_Label_Declaration set the Ekind to E_Label.
Without this change, this field would fail the vanishing-fields
check in Atree (which is currently commented out).
* einfo.ads (Entry_Cancel_Parameter): Document for E_Label.
* sem_eval.adb (Why_Not_Static): Protect against previous errors
(no need to explain why something is not static if it's already
illegal for other reasons).
* sem_util.ads (Enter_Name): Fix misleading comment.
Piotr Trojanek [Thu, 2 Mar 2023 14:11:40 +0000 (15:11 +0100)]
ada: Tune warning about assignment just before a raise statement
Tune warning about a possibly ineffective assignment to a formal
parameter that happens just before a raise statement.
The warning is now emitted for parameters of all by-copy types and not
just of scalar types (this gives more warnings), but is suppressed for
aliased parameters (this removes some spurious warnings).
gcc/ada/
* sem_ch11.adb (Analyze_Raise_Expression): Tune warning condition.
* libgnat/g-dirope.ads (Open): Remove a potentially inaccurate comment.
* libgnat/g-dirope.adb (Open): Remove a potentially useless assignment;
the Dir output parameter should be assigned a null value anyway by the
preceding call to Free.
Marc Poulhiès [Tue, 28 Feb 2023 10:01:47 +0000 (11:01 +0100)]
ada: Fix SPARK context not restored when Load_Unit is failing
When Load_Unit fails to find the unit or encounters an error, the
Load_Fail procedure is called and an exception is raised, skipping the
restoration of the SPARK/Ghost context stored on procedure entry.
gcc/ada/
* rtsfind.adb (Load_RTU.Restore_SPARK_Context): New.
(Load_RTU): Use Restore_SPARK_Context on all exit paths.
* sem_ch6.adb (Analyze_Subprogram_Body_Helper): Initialize local
variable to Empty.
Piotr Trojanek [Tue, 7 Feb 2023 23:54:06 +0000 (00:54 +0100)]
ada: Restrict use of formal parameters within exceptional cases
Restrict references to formal parameters within the new SPARK aspect
Exceptional_Cases and allow occurrences of 'Old in this aspect.
gcc/ada/
* sem_attr.adb
(Analyze_Attribute_Old_Result): Allow uses of 'Old and 'Result within
the new aspect.
* sem_res.adb
(Within_Exceptional_Cases_Consequence): New utility routine.
(Resolve_Entity_Name): Restrict use of formal parameters within the
new aspect.
Aldy Hernandez [Wed, 24 May 2023 17:55:09 +0000 (19:55 +0200)]
Disallow setting of NANs in frange setter unless setting trees.
frange::set() is confusing in that we can set a NAN by specifying a
bound of +-NAN, even though we tecnically disallow NANs in the setter
because the kind can never be VR_NAN. This is a wart for
get_tree_range(), which builds a range out of a tree from the source,
to work correctly. It's ugly, and it showed its limitation while
implementing LTO streaming of ranges.
This patch disallows passing NAN bounds in frange::set() and fixes
get_tree_range.
gcc/ChangeLog:
* value-query.cc (range_query::get_tree_range): Set NAN directly
if necessary.
* value-range.cc (frange::set): Assert that bounds are not NAN.
Aldy Hernandez [Wed, 24 May 2023 17:53:53 +0000 (19:53 +0200)]
Hash known NANs correctly for franges.
We're ICEing when trying to hash a known NAN. This is unnoticeable
because the only user would be IPA, and even so, it currently doesn't
handle floats. However, handling floats is a flip of a switch, so
it's best to handle them already.
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