xuli [Tue, 24 Oct 2023 07:39:02 +0000 (07:39 +0000)]
RISC-V: Fix ICE of RVV vget/vset intrinsic[PR111935]
Calling vget/vset intrinsic without receiving a return value will cause
a crash. Because in this case e.target is null.
This patch should be backported to releases/gcc-13.
Iain Buclaw [Sun, 29 Oct 2023 19:13:14 +0000 (20:13 +0100)]
d: Fix ICE: verify_gimple_failed (conversion of register to a different size in 'view_convert_expr')
Static arrays in D are passed around by value, rather than decaying to a
pointer. On x86_64 __builtin_va_list is an exception to this rule, but
semantically it's still treated as a static array.
This makes certain assignment operations fail due a mismatch in types.
As all examples in the test program are rejected by C/C++ front-ends,
these are now errors in D too to be consistent.
PR d/110712
gcc/d/ChangeLog:
* d-codegen.cc (d_build_call): Update call to convert_for_argument.
* d-convert.cc (is_valist_parameter_type): New function.
(check_valist_conversion): New function.
(convert_for_assignment): Update signature. Add check whether
assigning va_list is permissible.
(convert_for_argument): Likewise.
* d-tree.h (convert_for_assignment): Update signature.
(convert_for_argument): Likewise.
* expr.cc (ExprVisitor::visit (AssignExp *)): Update call to
convert_for_assignment.
Iain Buclaw [Sat, 28 Oct 2023 22:27:49 +0000 (00:27 +0200)]
d: Fix ICE: in verify_gimple_in_seq on powerpc-darwin9 [PR112270]
This ICE was seen during stage2 on powerpc-darwin9 only. There were
still some uses of GCC's boolean_type_node in the D front-end, which
caused a type mismatch to trigger as D bool size is fixed to 1 byte on
all targets.
So two new nodes have been introduced - d_bool_false_node and
d_bool_true_node - which have replaced all remaining uses of
boolean_false_node and boolean_true_node respectively.
PR d/112270
gcc/d/ChangeLog:
* d-builtins.cc (d_build_d_type_nodes): Initialize d_bool_false_node,
d_bool_true_node.
* d-codegen.cc (build_array_struct_comparison): Use d_bool_false_node
instead of boolean_false_node.
* d-convert.cc (d_truthvalue_conversion): Use d_bool_false_node and
d_bool_true_node instead of boolean_false_node and boolean_true_node.
* d-tree.h (enum d_tree_index): Add DTI_BOOL_FALSE and DTI_BOOL_TRUE.
(d_bool_false_node): New macro.
(d_bool_true_node): New macro.
* modules.cc (build_dso_cdtor_fn): Use d_bool_false_node and
d_bool_true_node instead of boolean_false_node and boolean_true_node.
(register_moduleinfo): Use d_bool_type instead of boolean_type_node.
liuhongt [Wed, 18 Oct 2023 02:08:24 +0000 (10:08 +0800)]
Avoid compile time hog on vect_peel_nonlinear_iv_init for nonlinear induction vec_step_op_mul when iteration count is too big.
There's loop in vect_peel_nonlinear_iv_init to get init_expr *
pow (step_expr, skip_niters). When skipn_iters is too big, compile time
hogs. To avoid that, optimize init_expr * pow (step_expr, skip_niters) to
init_expr << (exact_log2 (step_expr) * skip_niters) when step_expr is
pow of 2, otherwise give up vectorization when skip_niters >=
TYPE_PRECISION (TREE_TYPE (init_expr)).
Also give up vectorization when niters_skip is negative which will be
used for fully masked loop.
gcc/ChangeLog:
PR tree-optimization/111820
PR tree-optimization/111833
* tree-vect-loop-manip.cc (vect_can_peel_nonlinear_iv_p): Give
up vectorization for nonlinear iv vect_step_op_mul when
step_expr is not exact_log2 and niters is greater than
TYPE_PRECISION (TREE_TYPE (step_expr)). Also don't vectorize
for nagative niters_skip which will be used by fully masked
loop.
(vect_can_advance_ivs_p): Pass whole phi_info to
vect_can_peel_nonlinear_iv_p.
* tree-vect-loop.cc (vect_peel_nonlinear_iv_init): Optimize
init_expr * pow (step_expr, skipn) to init_expr
<< (log2 (step_expr) * skipn) when step_expr is exact_log2.
gcc/testsuite/ChangeLog:
* gcc.target/i386/pr111820-1.c: New test.
* gcc.target/i386/pr111820-2.c: New test.
* gcc.target/i386/pr111820-3.c: New test.
* gcc.target/i386/pr103144-mul-1.c: Adjust testcase.
* gcc.target/i386/pr103144-mul-2.c: Adjust testcase.
Paul Thomas [Thu, 12 Oct 2023 06:26:59 +0000 (07:26 +0100)]
Fortran: Set hidden string length for pointer components [PR67740].
2023-10-11 Paul Thomas <pault@gcc.gnu.org>
gcc/fortran
PR fortran/67740
* trans-expr.cc (gfc_trans_pointer_assignment): Set the hidden
string length component for pointer assignment to character
pointer components.
gcc/testsuite/
PR fortran/67740
* gfortran.dg/pr67740.f90: New test
Lulu Cheng [Mon, 23 Oct 2023 01:07:32 +0000 (09:07 +0800)]
LoongArch: Define macro CLEAR_INSN_CACHE.
LoongArch's microstructure ensures cache consistency by hardware.
Due to out-of-order execution, "ibar" is required to ensure the visibility of the
store (invalidated icache) executed by this CPU before "ibar" (to the instance).
"ibar" will not invalidate the icache, so the start and end parameters are not Affect
"ibar" performance.
gcc/ChangeLog:
* config/loongarch/loongarch.h (CLEAR_INSN_CACHE): New definition.
chenxiaolong [Tue, 24 Oct 2023 06:40:14 +0000 (14:40 +0800)]
LoongArch: Implement __builtin_thread_pointer for TLS.
gcc/ChangeLog:
* config/loongarch/loongarch.md (get_thread_pointer<mode>):Adds the
instruction template corresponding to the __builtin_thread_pointer
function.
* doc/extend.texi:Add the __builtin_thread_pointer function support
description to the documentation.
gcc/testsuite/ChangeLog:
* gcc.target/loongarch/builtin_thread_pointer.c: New test.
Jonathan Wakely [Tue, 24 Oct 2023 15:56:30 +0000 (16:56 +0100)]
libstdc++: Build libstdc++_libbacktrace.a as PIC [PR111936]
In order for std::stacktrace to be used in a shared library, the
libbacktrace symbols need to be built with -fPIC. Add the libtool
-prefer-pic flag to the commands in src/libbacktrace/Makefile so that
the archive contains PIC objects.
Paul M. Bendixen [Fri, 21 Jul 2023 21:35:25 +0000 (23:35 +0200)]
libstdc++: Include cstdarg in freestanding
P1642 includes cstdarg in the full headers to include.
This commit includes it along with cstdalign and cstdbool that were
left out when updating in an earlier commit.
libstdc++/Changelog
* include/Makefile.am: Move cstdarg, cstdalign and cstdbool to
freestanding.
* include/Makefile.in: Regenerate.
Kewen Lin [Thu, 12 Oct 2023 05:05:03 +0000 (00:05 -0500)]
rs6000: Make 32 bit stack_protect support prefixed insn [PR111367]
As PR111367 shows, with prefixed insn supported, some of
checkings consider it's able to leverage prefixed insn
for stack protect related load/store, but since we don't
actually change the emitted assembly for 32 bit, it can
cause the assembler error as exposed.
Mike's commit r10-4547-gce6a6c007e5a98 has already handled
the 64 bit case (DImode), this patch is to treat the 32
bit case (SImode) by making use of mode iterator P and
ptrload attribute iterator, also fixes the constraints
to match the emitted operand formats.
PR target/111367
gcc/ChangeLog:
* config/rs6000/rs6000.md (stack_protect_setsi): Support prefixed
instruction emission and incorporate to stack_protect_set<mode>.
(stack_protect_setdi): Rename to ...
(stack_protect_set<mode>): ... this, adjust constraint.
(stack_protect_testsi): Support prefixed instruction emission and
incorporate to stack_protect_test<mode>.
(stack_protect_testdi): Rename to ...
(stack_protect_test<mode>): ... this, adjust constraint.
Benjamin Brock [Fri, 20 Oct 2023 17:07:50 +0000 (18:07 +0100)]
libstdc++: Workaround for LLVM-61763 in <ranges>
This patch adds a small workaround that avoids declaring constrained
friends when compiling with Clang, instead making some members public.
MSVC's standard library has implemented a similar workaround.
Signed-off-by: Benjamin Brock <brock@cs.berkeley.edu>
libstdc++-v3/ChangeLog:
* include/std/ranges (zip_view, adjacent_view): Implement
workaround for LLVM-61763.
Marek Polacek [Thu, 19 Oct 2023 20:32:10 +0000 (16:32 -0400)]
c-family: char8_t and aliasing in C vs C++ [PR111884]
In the PR, Joseph says that in C char8_t is not a distinct type. So
we should behave as if it can alias anything, like ordinary char.
In C, unsigned_char_type_node == char8_type_node, so with this patch
we return 0 instead of -1. And the following comment says:
/* The C standard guarantees that any object may be accessed via an
lvalue that has narrow character type (except char8_t). */
if (t == char_type_node
|| t == signed_char_type_node
|| t == unsigned_char_type_node)
return 0;
Which appears to be wrong, so I'm adjusting that as well.
PR c/111884
gcc/c-family/ChangeLog:
* c-common.cc (c_common_get_alias_set): Return -1 for char8_t only
in C++.
Lewis Hyatt [Wed, 18 Oct 2023 16:37:08 +0000 (12:37 -0400)]
c++: Make -Wunknown-pragmas controllable by #pragma GCC diagnostic [PR89038]
As noted on the PR, commit r13-1544, the fix for PR53431, did not handle
the specific case of -Wunknown-pragmas, because that warning is issued
during preprocessing, but not by libcpp directly (it comes from the
cb_def_pragma callback). Address that by handling this pragma in
addition to libcpp pragmas during the early pragma handler.
gcc/c-family/ChangeLog:
PR c++/89038
* c-pragma.cc (handle_pragma_diagnostic_impl): Handle
-Wunknown-pragmas during early processing.
gcc/testsuite/ChangeLog:
PR c++/89038
* c-c++-common/cpp/Wunknown-pragmas-1.c: New test.
While backporting another patch to an earlier release, I hit a
situation in which lra_eliminate_regs_1 would eliminate an address to:
(plus (reg:P R) (const_int 0))
This address compared not-equal to plain:
(reg:P R)
which caused an ICE in a later peephole2. (The ICE showed up in
gfortran.fortran-torture/compile/pr80464.f90 on the branch but seems
to be latent on trunk.)
These unfolded PLUSes shouldn't occur in the insn stream, and later code
in the same function tried to avoid them.
gcc/
PR target/111528
* lra-eliminations.cc (lra_eliminate_regs_1): Use simplify_gen_binary
rather than gen_rtx_PLUS.
Gaius Mulley [Wed, 18 Oct 2023 02:09:29 +0000 (03:09 +0100)]
PR modula2/111756: Re-building all-gcc after source changes fails to link
When having modula-2 enabled in a development tree and there are any
changes that trigger rebuilds in m2/ doing a 'make all-gcc' in the
build directory might fail due to lack of dependency tracking.
This patch introduces build dependencies into gcc/m2/Make-lang.in using
-M* options.
gcc/m2/ChangeLog:
PR modula2/111756
* Make-lang.in (CM2DEP): New define conditionally set if
($(CXXDEPMODE),depmode=gcc3).
(m2/gm2-gcc/%.o): Ensure $(@D)/$(DEPDIR) is created.
Add $(CM2DEP) to the $(COMPILER) command and use $(POSTCOMPILE).
(m2/gm2-gcc/m2configure.o): Ditto.
(m2/gm2-lang.o): Ditto.
(m2/m2pp.o): Ditto.
(m2/gm2-gcc/rtegraph.o): Ditto.
(m2/mc-boot/$(SRC_PREFIX)%.o): Ditto.
(m2/mc-boot-ch/$(SRC_PREFIX)%.o): Ditto.
(m2/mc-boot-ch/$(SRC_PREFIX)%.o): Ditto.
(m2/mc-boot/main.o): Ditto.
(mcflex.o): Ditto.
(m2/gm2-libs-boot/M2RTS.o): Ditto.
(m2/gm2-libs-boot/%.o): Ditto.
(m2/gm2-libs-boot/%.o): Ditto.
(m2/gm2-libs-boot/RTcodummy.o): Ditto.
(m2/gm2-libs-boot/RTintdummy.o): Ditto.
(m2/gm2-libs-boot/wrapc.o): Ditto.
(m2/gm2-libs-boot/UnixArgs.o): Ditto.
(m2/gm2-libs-boot/choosetemp.o): Ditto.
(m2/gm2-libs-boot/errno.o): Ditto.
(m2/gm2-libs-boot/dtoa.o): Ditto.
(m2/gm2-libs-boot/ldtoa.o): Ditto.
(m2/gm2-libs-boot/termios.o): Ditto.
(m2/gm2-libs-boot/SysExceptions.o): Ditto.
(m2/gm2-libs-boot/SysStorage.o): Ditto.
(m2/gm2-compiler-boot/M2GCCDeclare.o): Ditto.
(m2/gm2-compiler-boot/M2Error.o): Ditto.
(m2/gm2-compiler-boot/%.o): Ditto.
(m2/gm2-compiler-boot/%.o): Ditto.
(m2/gm2-compiler-boot/m2flex.o): Ditto.
(m2/gm2-compiler/m2flex.o): Ditto.
(m2/gm2-libs/choosetemp.o): Ditto.
(m2/boot-bin/mklink$(exeext)): Ditto.
(m2/pge-boot/%.o): Ditto.
(m2/pge-boot/%.o): Ditto.
* README: Remove out of date info.
* gm2-compiler/M2Quads.mod (BuildStringAdrParam): Correct
procedure end name.
* gm2-compiler/SymbolTable.mod (GetVarPointerCheck): Add
default FALSE return value.
Georg-Johann Lay [Tue, 17 Oct 2023 09:36:52 +0000 (11:36 +0200)]
LibF7: Implement fma / fmal.
libgcc/config/avr/libf7/
* libf7.h (F7_SIZEOF): New macro.
* libf7-asm.sx: Use F7_SIZEOF instead of magic number "10".
(F7MOD_D_fma_, __fma): New module and function.
(fma) [-mdouble=64]: Define as alias for __fma.
(fmal) [-mlong-double=64]: Define as alias for __fma.
* libf7-common.mk (F7_ASM_PARTS): Add D_fma.
rax is used to save and restore DFmode value. In RA both GENERAL_REGS
and SSE_REGS cost zero since we didn't disparage the
alternative in movdf_internal pattern, according to register
allocation order, GENERAL_REGS is allocated. The patch add ? for
alternative (r,v) and (v,r) just like we did for movsf/hf/bf_internal
pattern, after that we get optimal RA.
Kewen Lin [Mon, 16 Oct 2023 02:05:47 +0000 (21:05 -0500)]
rs6000: Use default target option node for callee by default [PR111380]
As PR111380 (and the discussion in related PRs) shows, for
now how function rs6000_can_inline_p treats the callee
without any target option node is wrong. It considers it's
always safe to inline this kind of callee, but actually its
target flags are from the command line options
(target_option_default_node), it's possible that the flags
of callee don't satisfy the condition of inlining, but it
is still inlined, then result in unexpected consequence.
As the associated test case pr111380-1.c shows, the caller
main is attributed with power8, but the callee foo is
compiled with power9 from command line, it's unexpected to
make main inline foo since foo can contain something that
requires power9 capability. Without this patch, for lto
(with -flto) we can get error message (as it forces the
callee to have a target option node), but for non-lto, it's
inlined unexpectedly.
This patch is to make callee adopt target_option_default_node
when it doesn't have a target option node, it can avoid wrong
inlining decision and fix the inconsistency between LTO and
non-LTO. It also aligns with what the other ports do.
PR target/111380
gcc/ChangeLog:
* config/rs6000/rs6000.cc (rs6000_can_inline_p): Adopt
target_option_default_node when the callee has no option
attributes, also simplify the existing code accordingly.
gcc/testsuite/ChangeLog:
* gcc.target/powerpc/pr111380-1.c: New test.
* gcc.target/powerpc/pr111380-2.c: New test.
Kewen Lin [Mon, 16 Oct 2023 02:05:40 +0000 (21:05 -0500)]
rs6000: Skip empty inline asm in rs6000_update_ipa_fn_target_info [PR111366]
PR111366 exposes one thing that can be improved in function
rs6000_update_ipa_fn_target_info is to skip the given empty
inline asm string, since it's impossible to adopt any
hardware features (so far HTM).
Since this rs6000_update_ipa_fn_target_info related approach
exists in GCC12 and later, the affected project highway has
updated its target pragma with ",htm", see the link:
https://github.com/google/highway/commit/15e63d61eb535f478bc
I'd not bother to consider an inline asm parser for now but
will file a separated PR for further enhancement.
Jakub Jelinek [Wed, 11 Oct 2023 06:58:29 +0000 (08:58 +0200)]
tree-ssa-strlen: optimization skips clobbering store [PR111519]
The following testcase is miscompiled, because count_nonzero_bytes incorrectly
uses get_strinfo information on a pointer from which an earlier instruction
loads SSA_NAME stored at the current instruction. get_strinfo shows a state
right before the current store though, so if there are some stores in between
the current store and the load, the string length information might have
changed.
The patch passes around gimple_vuse from the store and punts instead of using
strinfo on loads from MEM_REF which have different gimple_vuse from that.
2023-10-11 Richard Biener <rguenther@suse.de>
Jakub Jelinek <jakub@redhat.com>
PR tree-optimization/111519
* tree-ssa-strlen.cc (strlen_pass::count_nonzero_bytes): Add vuse
argument and pass it through to recursive calls and
count_nonzero_bytes_addr calls. Don't shadow the stmt argument, but
change stmt for gimple_assign_single_p statements for which we don't
immediately punt.
(strlen_pass::count_nonzero_bytes_addr): Add vuse argument and pass
it through to recursive calls and count_nonzero_bytes calls. Don't
use get_strinfo if gimple_vuse (stmt) is different from vuse. Don't
shadow the stmt argument.
Eric Botcazou [Tue, 26 Sep 2023 20:54:12 +0000 (22:54 +0200)]
ada: Fix infinite loop with multiple limited with clauses
This occurs when one of the types has an incomplete declaration in addition
to its full declaration in its package. In this case AI05-129 says that the
incomplete type is not part of the limited view of the package, i.e. only
the full view is. Now, in the GNAT implementation, it's the opposite in the
regular view of the package, i.e. the incomplete type is the visible one.
That's why the implementation needs to also swap the types on the visibility
chain while it is swapping the views when the clauses are either installed
or removed. This works correctly for the installation, but does not for the
removal, so this change rewrites the code doing the latter.
gcc/ada/
PR ada/111434
* sem_ch10.adb (Replace): New procedure to replace an entity with
another on the homonym chain.
(Install_Limited_With_Clause): Rename Non_Lim_View to Typ for the
sake of consistency. Call Replace to do the replacements and split
the code into the regular and the special cases. Add debuggging
output controlled by -gnatdi.
(Install_With_Clause): Print the Parent_With and Implicit_With flags
in the debugging output controlled by -gnatdi.
(Remove_Limited_With_Unit.Restore_Chain_For_Shadow (Shadow)): Rewrite
using a direct replacement of E4 by E2. Call Replace to do the
replacements. Add debuggging output controlled by -gnatdi.
Andrew Pinski [Thu, 5 Oct 2023 19:21:19 +0000 (12:21 -0700)]
MATCH: Fix infinite loop between `vec_cond(vec_cond(a,b,0), c, d)` and `a & b`
Match has a pattern which converts `vec_cond(vec_cond(a,b,0), c, d)`
into `vec_cond(a & b, c, d)` but since in this case a is a comparison
fold will change `a & b` back into `vec_cond(a,b,0)` which causes an
infinite loop.
The best way to fix this is to enable the patterns for vec_cond(*,vec_cond,*)
only for GIMPLE so we don't get an infinite loop for fold any more.
Paul Thomas [Wed, 4 Oct 2023 07:26:35 +0000 (08:26 +0100)]
Fortran: Alloc comp of non-finalizable type not finalized [PR111674]
2023-10-04 Paul Thomas <pault@gcc.gnu.org>
gcc/fortran
PR fortran/37336
PR fortran/111674
* trans-expr.cc (gfc_trans_scalar_assign): Finalize components
on deallocation if derived type is not finalizable.
gcc/testsuite/
PR fortran/37336
PR fortran/111674
* gfortran.dg/allocate_with_source_25.f90: Final count in tree
dump reverts from 4 to original 6.
* gfortran.dg/finalize_38.f90: Add test for fix of PR111674.
Tim Song [Wed, 6 Sep 2023 17:31:55 +0000 (19:31 +0200)]
libstdc++: Force _Hash_node_value_base methods inline to fix abi (PR111050)
https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=1b6f0476837205932613ddb2b3429a55c26c409d
changed _Hash_node_value_base to no longer derive from _Hash_node_base, which means
that its member functions expect _M_storage to be at a different offset. So explosions
result if an out-of-line definition is emitted for any of the member functions (say,
in a non-optimized build) and the resulting object file is then linked with code built
using older version of GCC/libstdc++.
Pat Haugen [Tue, 19 Sep 2023 18:19:59 +0000 (13:19 -0500)]
Disable generation of scalar modulo instructions.
It was recently discovered that the scalar modulo instructions can suffer
noticeable performance issues for certain input values. This patch disables
their generation since the equivalent div/mul/sub sequence does not suffer
the same problem.
gcc/
* config/rs6000/rs6000.cc (rs6000_rtx_costs): Check whether the
modulo instruction is disabled.
* config/rs6000/rs6000.h (RS6000_DISABLE_SCALAR_MODULO): New.
* config/rs6000/rs6000.md (mod<mode>3, *mod<mode>3): Check it.
(define_expand umod<mode>3): New.
(define_insn umod<mode>3): Rename to *umod<mode>3 and check if the modulo
instruction is disabled.
(umodti3, modti3): Check if the modulo instruction is disabled.
The problem here is after r6-7425-ga9fee7cdc3c62d0e51730,
the comparison to see if the transformation could be done was using the
wrong value. Instead of see if the inner was LE (for MIN and GE for MAX)
the outer value, it was comparing the inner to the value used in the comparison
which was wrong.
Committed to GCC 13 branch after bootstrapped and tested on x86_64-linux-gnu.
gcc/ChangeLog:
PR tree-optimization/111331
* tree-ssa-phiopt.cc (minmax_replacement):
Fix the LE/GE comparison for the
`(a CMP CST1) ? max<a,CST2> : a` optimization.
gcc/testsuite/ChangeLog:
PR tree-optimization/111331
* gcc.c-torture/execute/pr111331-1.c: New test.
* gcc.c-torture/execute/pr111331-2.c: New test.
* gcc.c-torture/execute/pr111331-3.c: New test.
Andrew Pinski [Sun, 24 Sep 2023 04:53:09 +0000 (21:53 -0700)]
Fix PR 110386: backprop vs ABSU_EXPR
The issue here is that when backprop tries to go
and strip sign ops, it skips over ABSU_EXPR but
ABSU_EXPR not only does an ABS, it also changes the
type to unsigned.
Since strip_sign_op_1 is only supposed to strip off
sign changing operands and not ones that change types,
removing ABSU_EXPR here is correct. We don't handle
nop conversions so this does cause any missed optimizations either.
Committed to the GCC 13 branch after bootstrapped and
tested on x86_64-linux-gnu with no regressions.
List official cores first so that -mcpu=native does not show a codename with
-v or in errors/warnings.
gcc/ChangeLog:
* config/aarch64/aarch64-cores.def (neoverse-n1): Place before ares.
(neoverse-v1): Place before zeus.
(neoverse-v2): Place before demeter.
* config/aarch64/aarch64-tune.md: Regenerate.
A MOPS memmove may corrupt registers since there is no copy of the input
operands to temporary registers. Fix this by calling
aarch64_expand_cpymem_mops.
Reviewed-by: Richard Sandiford <richard.sandiford@arm.com>
gcc/ChangeLog/
PR target/111121
* config/aarch64/aarch64.md (aarch64_movmemdi): Add new expander.
(movmemdi): Call aarch64_expand_cpymem_mops for correct expansion.
* config/aarch64/aarch64.cc (aarch64_expand_cpymem_mops): Add support
for memmove.
* config/aarch64/aarch64-protos.h (aarch64_expand_cpymem_mops): Add new
function.
Paul Dreik [Thu, 24 Aug 2023 10:43:43 +0000 (11:43 +0100)]
libstdc++: fix illegal pointer arithmetic in format [PR111102]
When parsing a format string, the width is parsed into an unsigned short
but the result is not checked in the case the format string is not a
char string (such as a wide string). In case the parse fails, a null
pointer is returned which is used for pointer arithmetic which is
undefined behaviour.
Signed-off-by: Paul Dreik <gccpatches@pauldreik.se>
libstdc++-v3/ChangeLog:
PR libstdc++/111102
* include/std/format (__format::__parse_integer): Check for
non-null pointer.
Jonathan Wakely [Thu, 27 Jul 2023 13:07:09 +0000 (14:07 +0100)]
libstdc++: Fix std::format alternate form for floating-point [PR108046]
A decimal point was being added to the end of the string for {:#.0}
because the __expc character was not being set, for the _Pres_none
presentation type, so __s.find(__expc) didn't the 'e' in "1e+01" and so
we created "1e+01." by appending the radix char to the end.
This can be fixed by ensuring that __expc='e' is set for the _Pres_none
case. I realized we can also set __expc='P' and __expc='E' when needed,
to save a call to std::toupper later.
For the {:#.0g} format, __expc='e' was being set and so the 'e' was
found in "1e+10" but then __z = __prec - __sigfigs would wraparound to
SIZE_MAX. That meant we would decide not to add a radix char because the
number of extra characters to insert would be 1+SIZE_MAX i.e. zero.
This can be fixed by using __z == 0 when __prec == 0.
libstdc++-v3/ChangeLog:
PR libstdc++/108046
* include/std/format (__formatter_fp::format): Ensure __expc is
always set for all presentation types. Set __z correctly for
zero precision.
* testsuite/std/format/functions/format.cc: Check problem cases.
Jonathan Wakely [Wed, 9 Aug 2023 10:11:31 +0000 (11:11 +0100)]
libstdc++: Fix constexpr functions to conform to older standards
Some constexpr functions were inadvertently relying on relaxed constexpr
rules from later standards.
libstdc++-v3/ChangeLog:
* include/bits/chrono.h (duration_cast): Do not use braces
around statements for C++11 constexpr rules.
* include/bits/stl_algobase.h (__lg): Rewrite as a single
statement for C++11 constexpr rules.
* include/experimental/bits/fs_path.h (path::string): Use
_GLIBCXX17_CONSTEXPR not _GLIBCXX_CONSTEXPR for 'if constexpr'.
* include/std/charconv (__to_chars_8): Initialize variable for
C++17 constexpr rules.
Eric Botcazou [Mon, 18 Sep 2023 07:14:46 +0000 (09:14 +0200)]
ada: Fix missing call to Finalize_Protection for simple protected objects
There is a glitch in Exp_Ch7.Build_Finalizer causing the finalizer to do
nothing for simple protected objects.
The change also removes redundant calls to the Is_Simple_Protected_Type
predicate and fixes a minor inconsistency between Requires_Cleanup_Actions
and Build_Finalizer for this case.
gcc/ada/
* exp_ch7.adb (Build_Finalizer.Process_Declarations): Remove call
to Is_Simple_Protected_Type as redundant.
(Build_Finalizer.Process_Object_Declaration): Do not retrieve the
corresponding record type for simple protected objects. Make the
flow of control more explicit in their specific processing.
* exp_util.adb (Requires_Cleanup_Actions): Return false for simple
protected objects present in library-level package bodies for the
sake of consistency with Build_Finalizer and remove call to
Is_Simple_Protected_Type as redundant.
Eric Botcazou [Thu, 7 Sep 2023 14:44:36 +0000 (16:44 +0200)]
ada: Fix wrong optimization of extended return for discriminated record type
This happens when the discriminants of the record type have default values.
gcc/ada/ChangeLog:
* inline.adb (Expand_Inlined_Call): In the case of a function call
that returns an unconstrained type and initializes an object, set
the No_Initialization flag on the new declaration of the object.
Eric Botcazou [Wed, 6 Sep 2023 07:37:29 +0000 (09:37 +0200)]
ada: Fix internal error on aggregate nested in container aggregate
This handles the case where a component association is present.
gcc/ada/
* exp_aggr.adb (Convert_To_Assignments): In the case of a
component association, call Is_Container_Aggregate on the parent's
parent.
(Expand_Array_Aggregate): Likewise.
Eric Botcazou [Tue, 5 Sep 2023 11:21:24 +0000 (13:21 +0200)]
ada: Fix internal error on expression function with Refined_Post aspect
This occurs when the expression function calls a protected function and the
-gnata switch is specified, because the compiler wrongly freezes the called
function when analyzing the expression function, a fallout of the wrapping
scheme used for the Post and Refined_Post aspects.
gcc/ada/
* sem_res.adb (Resolve_Call): When the target is an entity, do not
freeze it if the current scope is the inner wrapper function built
for an expression function with a Post or Refined_Post aspect.
Eric Botcazou [Sun, 27 Aug 2023 07:34:59 +0000 (09:34 +0200)]
ada: Fix late finalization for function call in delta aggregate
The problem occurs at library level because the temporary created for the
function call lives in the elaboration routine but is finalized only when
the package itself is.
It turns out that there is no need for this temporary, since the expansion
of delta aggregates already creates a (properly finalized) temporary.
gcc/ada/
* exp_ch6.adb (Expand_Ctrl_Function_Call): Also do nothing for the
expression of a delta aggregate.
Eric Botcazou [Mon, 21 Aug 2023 16:23:46 +0000 (18:23 +0200)]
ada: Fix assertion failure on very peculiar enumeration type
The compiler currently does not support the combination of a representation
clause on an enumeration type with a size clause whose value is greater than
the size of the largest machine scalar supported by the target.
Given that such a type would have little practical value, this change causes
the compiler to give a proper error message instead of aborting.
gcc/ada/
* freeze.adb (Freeze_Enumeration_Type): Give an error on a type with
both representation clause and too large size.
Eric Botcazou [Tue, 25 Jul 2023 21:03:22 +0000 (23:03 +0200)]
ada: Fix spurious error on 'Input of private type with Type_Invariant aspect
The problem is that it is necessary to break the privacy during the
expansion of the Input attribute, which may introduce a view mismatch
with the parameter of the routine checking the invariant of the type.
gcc/ada/
* exp_util.adb (Make_Invariant_Call): Convert the expression to
the type of the formal parameter if need be.
Eric Botcazou [Tue, 11 Jul 2023 11:29:55 +0000 (13:29 +0200)]
ada: Fix memory explosion on aggregate of nested packed array type
It occurs at compile time on an aggregate of a 2-dimensional packed array
type whose component type is itself a packed array, because the compiler
is trying to pack the intermediate aggregate and ends up rewriting a bunch
of subcomponents. This optimization was originally devised for the case of
a scalar component type so the change adds this restriction.
gcc/ada/
* exp_aggr.adb (Is_Two_Dim_Packed_Array): Return true only if the
component type of the array is scalar.
Eric Botcazou [Wed, 5 Jul 2023 20:04:07 +0000 (22:04 +0200)]
ada: Improve error message for ambiguous subprogram call
This restores the full listing of the types for the interpretations.
gcc/ada/
* sem_util.ads (Wrong_Type): Add Multiple parameter defaulting to
False and document it.
* sem_util.adb (Wrong_Type): Do not return early if an error has
already been posted on Expr and Multiple is True.
* sem_ch4.adb (Analyze_One_Call): Pass All_Errors_Mode as the
actual parameter for Multiple to Wrong_Type.
Eric Botcazou [Wed, 5 Jul 2023 17:49:40 +0000 (19:49 +0200)]
ada: Fix assertion failure introduced by latest change
The new processing is not properly guarded.
gcc/ada/
* sem_ch13.adb (Replace_Type_References_Generic.Visible_Component):
In the case of private discriminated types, explicitly check that we
have a private declaration before examining its discriminant part.
Eric Botcazou [Sun, 2 Jul 2023 08:07:55 +0000 (10:07 +0200)]
ada: Fix Valid_Scalars attribute applied to types from limited with
The attribute is wrongly computed as always True because, unlike for e.g.
private types, Validated_View does not look through the limited view.
gcc/ada/
* sem_util.ads (Validated_View): Document enhanced behavior.
* sem_util.adb (Validated_View): Return the nonlimited view, if any,
of types coming from a limited with.
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