Bill Schmidt [Mon, 2 Oct 2017 18:09:20 +0000 (18:09 +0000)]
backport: re PR tree-optimization/82337 (ICE: SSA corruption at tree-ssa-coalesce.c:1010)
[gcc]
2017-10-02 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
Backport from mainline
2017-09-29 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
PR tree-optimization/82337
* gimple-ssa-strength-reduction.c (find_phi_def): Don't record a
phi definition if the PHI result appears in an abnormal PHI.
(find_basis_for_base_expr): Don't record a basis if the LHS of the
basis appears in an abnormal PHI.
[gcc]
2017-10-02 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
Backport from mainline
2017-09-29 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
PR tree-optimization/82337
* gcc.c-torture/compile/pr82337.c: New file.
Alan Modra [Thu, 21 Sep 2017 12:57:24 +0000 (22:27 +0930)]
PR81996, __builtin_return_address(0) fails
rs6000_return_addr assumes that the stack link is at frame+0, which is
true for count>0. For count==0, rs6000_return_addr is called with
frame==frame_pointer_rtx and the stack link is *not* at frame+0 if
-fstack-protector-all or -fsanitize=address because rs6000.h sets
FRAME_GROWS_DOWNWARD for those options.
PR target/81996
* gcc/config/rs6000/rs6000.c (rs6000_return_addr): Use
stack_pointer_rtx for count 0. Update comments. Break up
large rtl expression.
As described in PR71951, if libgcc is built with -fomit-frame-pointer,
unwinding crashes, for example while doing a backtrace. The underlying
reason is the Dwarf unwinder does not setup the frame pointer register
in the initialization code. When later unwinding a function that uses
the frame pointer, it tries to read FP using _Unwind_GetGR, and this
crashes if has never restored FP. To unwind correctly the first frame
must save and restore FP (it is unwound in a special way so that it
uses SP instead of FP). This is done by adding -fno-omit-frame-pointer.
i386.c (fold_builtin_cpu): Add M_AMDFAM17H to processor_model and "amdfam17h" to arch_names_table.
* config/i386/i386.c (fold_builtin_cpu): Add M_AMDFAM17H
to processor_model and "amdfam17h" to arch_names_table.
* doc/extend.texi (__builtin_cpu_is): Document amdfam17h CPU name.
Richard Biener [Mon, 18 Sep 2017 11:07:50 +0000 (11:07 +0000)]
backport: [multiple changes]
2017-09-18 Richard Biener <rguenther@suse.de>
Backport from mainline
2017-08-28 Richard Biener <rguenther@suse.de>
PR tree-optimization/81977
* tree-ssa-sccvn.c (vn_reference_lookup_3): Fix look through
memcpy.
* g++.dg/torture/pr81977.C: New testcase.
2017-09-04 Richard Biener <rguenther@suse.de>
PR tree-optimization/82084
* fold-const.h (can_native_encode_string_p): Declare.
* fold-const.c (can_native_encode_string_p): Factor out from ...
(native_encode_string): ... here.
* tree-vect-stmts.c (vectorizable_store): Call it to avoid
vectorizing stores from constants we later cannot handle.
* g++.dg/torture/pr82084.C: New testcase.
2017-07-25 Richard Biener <rguenther@suse.de>
PR middle-end/81505
* fold-const.c (fold_negate_const): TREE_OVERFLOW should be
sticky.
Jakub Jelinek [Fri, 15 Sep 2017 21:40:51 +0000 (23:40 +0200)]
backport: re PR target/82112 (internal compiler error: in fold_convert_loc, at fold-const.c:2262)
Backported from mainline
2017-09-12 Jakub Jelinek <jakub@redhat.com>
PR target/82112
* c-common.c (sync_resolve_size): Instead of c_dialect_cxx ()
assertion check that in the condition.
(get_atomic_generic_size): Likewise. Before testing if parameter
has pointer type, if it has array type, call for C++
default_conversion to perform array-to-pointer conversion.
* c-c++-common/pr82112.c: New test.
* gcc.dg/pr82112.c: New test.
Jakub Jelinek [Fri, 15 Sep 2017 21:34:10 +0000 (23:34 +0200)]
backport: re PR middle-end/81052 (ICE in verify_dominators, at dominance.c:1184)
Backported from mainline
2017-08-03 Jakub Jelinek <jakub@redhat.com>
PR middle-end/81052
* omp-low.c (diagnose_sb_0): Handle flag_openmp_simd like flag_openmp.
(pass_diagnose_omp_blocks::gate): Enable also for flag_openmp_simd.
Backported from mainline
2017-07-27 Jakub Jelinek <jakub@redhat.com>
PR c/45784
* c-omp.c (c_finish_omp_for): If the condition is wrapped in
rhs of COMPOUND_EXPR(s), skip them and readd their lhs into
new COMPOUND_EXPRs around the rhs of the comparison.
* testsuite/libgomp.c/pr45784.c: New test.
* testsuite/libgomp.c++/pr45784.C: New test.
Jakub Jelinek [Fri, 15 Sep 2017 21:32:05 +0000 (23:32 +0200)]
backport: re PR target/81766 (ICE in maybe_add_or_update_dep_1, at sched-deps.c:924 caused by r250815)
Backported from mainline
2017-08-08 Richard Biener <rguenther@suse.de>
PR middle-end/81766
* function.c (thread_prologue_and_epilogue_insns): Restore
behavior of always calling find_many_sub_basic_blocks on
the inserted prologue.
* gcc.target/i386/pr81766.c: New testcase.
2017-08-02 Jakub Jelinek <jakub@redhat.com>
PR middle-end/79499
* function.c (thread_prologue_and_epilogue_insns): Determine blocks
for find_many_sub_basic_blocks bitmap by looking up BLOCK_FOR_INSN
of first NONDEBUG_INSN_P in each of the split_prologue_seq and
prologue_seq sequences - if any.
Jakub Jelinek [Fri, 15 Sep 2017 21:30:04 +0000 (23:30 +0200)]
backport: re PR target/81225 (ICE with -mavx512ifma -O3 -ffloat-store)
Backported from mainline
2017-06-30 Jakub Jelinek <jakub@redhat.com>
PR target/81225
* config/i386/sse.md (vec_extract_lo_<mode><mask_name>): For
V8FI, V16FI and VI8F_256 iterators, use <store_mask_predicate> instead
of nonimmediate_operand and <store_mask_constraint> instead of m for
the input operand. For V8FI iterator, always split if input is a MEM.
For V16FI and V8SF_256 iterators, don't test if both operands are MEM
if <mask_applied>. For VI4F_256 iterator, use <store_mask_predicate>
instead of register_operand and <store_mask_constraint> instead of v for
the input operand. Make sure both operands aren't MEMs for if not
<mask_applied>.
Martin Liska [Fri, 15 Sep 2017 09:21:42 +0000 (11:21 +0200)]
Backport r251530
2017-09-15 Martin Liska <mliska@suse.cz>
Backport from mainline
2017-08-30 Martin Liska <mliska@suse.cz>
PR inline-asm/82001
* ipa-icf-gimple.c (func_checker::compare_tree_list_operand):
Rename to ...
(func_checker::compare_asm_inputs_outputs): ... this function.
(func_checker::compare_gimple_asm): Use the function to compare
also ASM constrains.
* ipa-icf-gimple.h: Rename the function.
2017-09-15 Martin Liska <mliska@suse.cz>
Backport from mainline
2017-08-30 Martin Liska <mliska@suse.cz>
PR inline-asm/82001
* gcc.dg/ipa/pr82001.c: New test.
Martin Liska [Fri, 15 Sep 2017 09:17:18 +0000 (11:17 +0200)]
Backport r251020
2017-09-15 Martin Liska <mliska@suse.cz>
Backport from mainline
2017-08-10 Martin Liska <mliska@suse.cz>
PR c++/81355
* c-attribs.c (handle_target_attribute):
Report warning for an empty string argument of target attribute.
2017-09-15 Martin Liska <mliska@suse.cz>
Backport from mainline
2017-08-10 Martin Liska <mliska@suse.cz>
Martin Liska [Fri, 15 Sep 2017 09:15:32 +0000 (11:15 +0200)]
Backport r250951
2017-09-15 Martin Liska <mliska@suse.cz>
Backport from mainline
2017-08-08 Martin Liska <mliska@suse.cz>
PR tree-opt/81696
* ipa-icf-gimple.c (func_checker::compare_cst_or_decl): Consider
LABEL_DECLs that can be from a different function.
2017-09-15 Martin Liska <mliska@suse.cz>
Backport from mainline
2017-08-08 Martin Liska <mliska@suse.cz>
PR tree-opt/81696
* gcc.dg/ipa/pr81696.c: New test.
Bill Schmidt [Tue, 12 Sep 2017 21:03:42 +0000 (21:03 +0000)]
backport: re PR target/81833 (PowerPC: VSX: Miscompiles ffmpeg's scalarproduct_int16_vsx at -O1)
[gcc]
2017-09-12 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
Backport from mainline
2017-09-05 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
PR target/81833
* config/rs6000/altivec.md (altivec_vsum2sws): Convert from a
define_insn to a define_expand.
(altivec_vsum2sws_direct): New define_insn.
(altivec_vsumsws): Convert from a define_insn to a define_expand.
[gcc/testsuite]
2017-09-12 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
Backport from mainline
2017-09-05 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
PR target/81833
* gcc.target/powerpc/pr81833-1.c: New file.
* gcc.target/powerpc/pr81833-2.c: New file.
Max Filippov [Mon, 11 Sep 2017 21:49:34 +0000 (21:49 +0000)]
xtensa: fix PR target/82181
2017-09-11 Max Filippov <jcmvbkbc@gmail.com>
gcc/
Backport from mainline
* config/xtensa/xtensa.c (xtensa_mem_offset): Check that both
words of DImode object are reachable by xtensa_uimm8x4 access.
backport: re PR sanitizer/81066 (sanitizer_stoptheworld_linux_libcdep.cc:276:22: error: aggregate ‘sigaltstack handler_stack’ has incomplete type and cannot be defined)
2017-09-07 Matthias Klose <doko@ubuntu.com>
Backported from mainline
2017-07-14 Jakub Jelinek <jakub@redhat.com>
Bill Schmidt [Wed, 6 Sep 2017 18:44:51 +0000 (18:44 +0000)]
backport: re PR tree-optimization/81987 (ICE in verify_ssa with -O3 -march=skylake-avx512)
[gcc]
2017-09-06 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
Backport from mainline:
2017-08-30 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
PR tree-optimization/81987
* gimple-ssa-strength-reduction.c (insert_initializers): Don't
insert an initializer in a location not dominated by the stride
definition.
[gcc/testsuite]
2017-09-06 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
Backport from mainline:
2017-08-30 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
PR tree-optimization/81987
* g++.dg/torture/pr81987.C: New file.
Eric Botcazou [Tue, 5 Sep 2017 08:31:50 +0000 (08:31 +0000)]
trans.c (Call_to_gnu): If this is a function call and there is no target...
* gcc-interface/trans.c (Call_to_gnu): If this is a function call and
there is no target, do not create a temporary for the return value for
an allocator either.
Jonathan Wakely [Mon, 4 Sep 2017 16:52:30 +0000 (17:52 +0100)]
PR libstdc++/81751 don't call fflush(NULL)
Backport from mainline
2017-08-09 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/79820
PR libstdc++/81751
* config/io/basic_file_stdio.cc (sys_open(FILE*, ios_base::openmode)):
Call fflush on the stream instead of calling sync() while _M_cfile is
null. Restore original value of errno.
* testsuite/ext/stdio_filebuf/char/79820.cc: New.
* testsuite/ext/stdio_filebuf/char/81751.cc: New.
Michael Meissner [Wed, 30 Aug 2017 13:38:27 +0000 (13:38 +0000)]
backport: re PR target/81593 (Optimize PowerPC vector set from vector extract)
[gcc]
2017-08-30 Michael Meissner <meissner@linux.vnet.ibm.com>
Back port from trunk
2017-08-07 Michael Meissner <meissner@linux.vnet.ibm.com>
PR target/81593
* config/rs6000/vsx.md (vsx_concat_<mode>_1): New combiner insns
to recognize inserting into a vector from a double word element
that was extracted from another vector, and eliminate extra
XXPERMDI instructions.
(vsx_concat_<mode>_2): Likewise.
(vsx_concat_<mode>_3): Likewise.
(vsx_set_<mode>, VSX_D): Rewrite vector set in terms of vector
concat to allow optimizing inserts from previous extracts.
[gcc/testsuite]
2017-08-30 Michael Meissner <meissner@linux.vnet.ibm.com>
Back port from trunk
2017-08-07 Michael Meissner <meissner@linux.vnet.ibm.com>
PR target/81593
* gcc.target/powerpc/vec-setup.h: New tests to test various
combinations of setting up vectors of 2 double word elements.
* gcc.target/powerpc/vec-setup-long.c: Likewise.
* gcc.target/powerpc/vec-setup-double.c: Likewise.
* gcc.target/powerpc/vec-setup-be-long.c: Likewise.
* gcc.target/powerpc/vec-setup-be-double.c: Likewise.
* gcc.target/powerpc/vsx-extract-6.c: New tests for optimzing
vector inserts from vector extracts.
* gcc.target/powerpc/vsx-extract-7.c: Likewise.
Michael Meissner [Tue, 29 Aug 2017 21:06:21 +0000 (21:06 +0000)]
<add missing ChangeLogs>
[gcc]
2017-07-13 Michael Meissner <meissner@linux.vnet.ibm.com>
Back port from trunk
2017-07-12 Michael Meissner <meissner@linux.vnet.ibm.com>
PR target/81193
* config/rs6000/rs6000-c.c (rs6000_cpu_cpp_builtins): If GLIBC
provides the hardware capability bits, define the macro
__BUILTIN_CPU_SUPPORTS__.
* config/rs6000/rs6000.c (cpu_expand_builtin): Generate a warning
if GLIBC does not provide the hardware capability bits. Add a
gcc_unreachable call if the built-in cpu function is neither
__builtin_cpu_is nor __builtin_cpu_supports.
* doc/extend.texi (PowerPC built-in functions): Document that
GLIBC 2.23 or newer is needed by __builtin_cpu_is and
__builtin_cpu_supports. Document the macros defined by GCC if the
newer GLIBC is available.
[gcc/testsuite]
2017-07-13 Michael Meissner <meissner@linux.vnet.ibm.com>
Back port from trunk
2017-06-28 Michael Meissner <meissner@linux.vnet.ibm.com>
PR target/81193
* lib/target-supports.exp
(check_ppc_cpu_supports_hw_available): New test to make sure
__builtin_cpu_supports works on power7 and newer.
Back port from trunk
2017-07-12 Michael Meissner <meissner@linux.vnet.ibm.com>
PR target/81193
* gcc.target/powerpc/cpu-builtin-1.c: Add guard against using
__builtin_cpu_supports with old GLIBC's.
Alan Modra [Tue, 29 Aug 2017 08:27:02 +0000 (17:57 +0930)]
[RS6000] linux startfile/endfile
These need to match the gnu-user.h definitions to support
--enable-default-pie. Otherwise we end up linking the wrong startup
files when defaulting to PIE.
PR target/81170
PR target/81295
* config/rs6000/sysv4.h (STARTFILE_LINUX_SPEC): Upgrade to
match gnu-user.h startfile.
(ENDFILE_LINUX_SPEC): Similarly.
Alan Modra [Tue, 29 Aug 2017 08:25:17 +0000 (17:55 +0930)]
PR driver/81523: Make -static override -pie
-static and -pie together behave differently depending on whether GCC is
configured with --enable-default-pie. On x86, "-static -pie" fails to
create executable when --enable-default-pie isn't used, but creates a
static executable when --enable-default-pie is used. This patch makes
-static completely override -pie to create a static executable, regardless
if --enable-default-pie is used to configure GCC.
PR target/81170
PR target/81295
PR driver/81523
* gcc.c (NO_PIE_SPEC): Delete.
(PIE_SPEC): Define as !no-pie/pie. Move static|shared|r
exclusion..
(LINK_PIE_SPEC): ..to here.
(LINK_COMMAND_SPEC): Support -no-pie.
* config/gnu-user.h (GNU_USER_TARGET_STARTFILE_SPEC): Correct
chain of crtbegin*.o selection, update for PIE_SPEC changes and
format.
(GNU_USER_TARGET_ENDFILE_SPEC): Similarly.
* config/sol2.h (STARTFILE_CRTBEGIN_SPEC): Similarly.
(ENDFILE_CRTEND_SPEC): Similarly.
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