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  1. 12 Jun, 2019 8 commits
    • Replace std::to_string for integers with optimized version · cd0b94e6 
      The std::to_chars functions from C++17 can be used to implement
std::to_string with much better performance than calling snprintf. Only
the __detail::__to_chars_len and __detail::__to_chars_10 functions are
needed for to_string, because it always outputs base 10 representations.

The return type of __detail::__to_chars_10 should not be declared before
C++17, so the function body is extracted into a new function that can be
reused by to_string and __detail::__to_chars_10.

The existing tests for to_chars rely on to_string to check for correct
answers. Now that they use the same code that doesn't actually ensure
correctness, so add new tests for std::to_string that compare against
printf output.

	* include/Makefile.am: Add new <bits/charconv.h> header.
	* include/Makefile.in: Regenerate.
	* include/bits/basic_string.h (to_string(int), to_string(unsigned))
	(to_string(long), to_string(unsigned long), to_string(long long))
	(to_string(unsigned long long)): Rewrite to use __to_chars_10_impl.
	* include/bits/charconv.h: New header.
	(__detail::__to_chars_len): Move here from <charconv>.
	(__detail::__to_chars_10_impl): New function extracted from
	__detail::__to_chars_10.
	* include/std/charconv (__cpp_lib_to_chars): Add, but comment out.
	(__to_chars_unsigned_type): New class template that reuses
	__make_unsigned_selector_base::__select to pick a type.
	(__unsigned_least_t): Redefine as __to_chars_unsigned_type<T>::type.
	(__detail::__to_chars_len): Move to new header.
	(__detail::__to_chars_10): Add inline specifier. Move code doing the
	output to __detail::__to_chars_10_impl and call that.
	* include/std/version (__cpp_lib_to_chars): Add, but comment out.
	* testsuite/21_strings/basic_string/numeric_conversions/char/
	to_string.cc: Fix reference in comment. Remove unused variable.
	* testsuite/21_strings/basic_string/numeric_conversions/char/
	to_string_int.cc: New test.

From-SVN: r272186
      Jonathan Wakely committed
    • Disable hash-table sanitization for mem stats maps. · ff7b3aa5 
      2019-06-12  Martin Liska  <mliska@suse.cz>

	* ggc-common.c (ggc_prune_overhead_list): Do not sanitize
	the created map.
	* hash-map.h: Add sanitize_eq_and_hash into ::hash_map.
	* mem-stats.h (mem_alloc_description::mem_alloc_description):
	Do not sanitize created maps.

From-SVN: r272183
      Martin Liska committed
    • Remove value_range_constant_singleton in favor of value_range::singleton_p. · 57bbc3e2 
      From-SVN: r272182
      Aldy Hernandez committed
    • re PR target/90811 ([nvptx] ptxas error on OpenMP offloaded code) · 26d7a5e6 
      	PR target/90811
	* cfgexpand.c (align_local_variable): Add really_expand argument,
	don't SET_DECL_ALIGN if it is false.
	(add_stack_var): Add really_expand argument, pass it through to
	align_local_variable.
	(expand_one_stack_var_1): Pass true as really_expand to
	align_local_variable.
	(expand_one_ssa_partition): Pass true as really_expand to
	add_stack_var.
	(expand_one_var): Pass really_expand through to add_stack_var.

From-SVN: r272181
      Jakub Jelinek committed
    • [arm] Implement usadv16qi and ssadv16qi standard names · 84ae7213 
      
This patch implements the usadv16qi and ssadv16qi standard names for arm.

The V16QImode variant is important as it is the most commonly used pattern:
reducing vectors of bytes into an int.
The midend expects the optab to compute the absolute differences of operands 1
and 2 and reduce them while widening along the way up to SImode. So the inputs
are V16QImode and the output is V4SImode.

I've based my solution on Aarch64 usadv16qi and ssadv16qi standard names
current implementation (r260437). This solution emits below sequence of
instructions:

        VABDL.u8        tmp, op1, op2   # op1, op2 lowpart
        VABAL.u8        tmp, op1, op2   # op1, op2 highpart
        VPADAL.u16      op3, tmp

So, for the code:

$ arm-none-linux-gnueabihf-gcc -S -O3 -march=armv8-a+simd -mfpu=auto -mfloat-abi=hard usadv16qi.c -dp

#define N 1024
unsigned char pix1[N];
unsigned char pix2[N];

int
foo (void)
{
  int i_sum = 0;
  int i;
  for (i = 0; i < N; i++)
    i_sum += __builtin_abs (pix1[i] - pix2[i]);
  return i_sum;
}

we now generate on arm:
foo:
        movw    r3, #:lower16:pix2      @ 57    [c=4 l=4]  *arm_movsi_vfp/3
        movt    r3, #:upper16:pix2      @ 58    [c=4 l=4]  *arm_movt/0
        vmov.i32        q9, #0  @ v4si  @ 3     [c=4 l=4]  *neon_movv4si/2
        movw    r2, #:lower16:pix1      @ 59    [c=4 l=4]  *arm_movsi_vfp/3
        movt    r2, #:upper16:pix1      @ 60    [c=4 l=4]  *arm_movt/0
        add     r1, r3, #1024   @ 8     [c=4 l=4]  *arm_addsi3/4
.L2:
        vld1.8  {q11}, [r3]!    @ 11    [c=8 l=4]  *movmisalignv16qi_neon_load
        vld1.8  {q10}, [r2]!    @ 10    [c=8 l=4]  *movmisalignv16qi_neon_load
        cmp     r1, r3  @ 21    [c=4 l=4]  *arm_cmpsi_insn/2
        vabdl.u8        q8, d20, d22    @ 12    [c=8 l=4]  neon_vabdluv8qi
        vabal.u8        q8, d21, d23    @ 15    [c=88 l=4]  neon_vabaluv8qi
        vpadal.u16      q9, q8  @ 16    [c=8 l=4]  neon_vpadaluv8hi
        bne     .L2             @ 22    [c=16 l=4]  arm_cond_branch
        vadd.i32        d18, d18, d19   @ 24    [c=120 l=4]  quad_halves_plusv4si
        vpadd.i32       d18, d18, d18   @ 25    [c=8 l=4]  neon_vpadd_internalv2si
        vmov.32 r0, d18[0]      @ 30    [c=12 l=4]  vec_extractv2sisi/1

instead of:
foo:
        @ args = 0, pretend = 0, frame = 0
        @ frame_needed = 0, uses_anonymous_args = 0
        @ link register save eliminated.
        movw    r3, #:lower16:pix1
        movt    r3, #:upper16:pix1
        vmov.i32        q9, #0  @ v4si
        movw    r2, #:lower16:pix2
        movt    r2, #:upper16:pix2
        add     r1, r3, #1024
.L2:
        vld1.8  {q8}, [r3]!
        vld1.8  {q11}, [r2]!
        vmovl.u8 q10, d16
        cmp     r1, r3
        vmovl.u8 q8, d17
        vmovl.u8 q12, d22
        vmovl.u8 q11, d23
        vsub.i16        q10, q10, q12
        vsub.i16        q8, q8, q11
        vabs.s16        q10, q10
        vabs.s16        q8, q8
        vaddw.s16       q9, q9, d20
        vaddw.s16       q9, q9, d21
        vaddw.s16       q9, q9, d16
        vaddw.s16       q9, q9, d17
        bne     .L2
        vadd.i32        d18, d18, d19
        vpadd.i32       d18, d18, d18
        vmov.32 r0, d18[0]

2019-06-12  Przemyslaw Wirkus  <przemyslaw.wirkus@arm.com>

        * config/arm/iterators.md (VABAL): New int iterator.
        * config/arm/neon.md (<sup>sadv16qi): New define_expand.
        * config/arm/unspecs.md ("unspec"): Define UNSPEC_VABAL_S, UNSPEC_VABAL_U
        values.

        * gcc.target/arm/ssadv16qi.c: New test.
        * gcc.target/arm/usadv16qi.c: Likewise.

From-SVN: r272180
      Przemyslaw Wirkus committed
    • Remove wrong assert about single value profiler. · d134323b 
      2019-06-12  Martin Liska  <mliska@suse.cz>

	* value-prof.c (stream_out_histogram_value): Only first value
	can't be negative.

From-SVN: r272179
      Martin Liska committed
    • re PR c/90760 (ICE on attributes section and alias in set_section, at symtab.c:1573) · f3139680 
      	PR c/90760
	* symtab.c (symtab_node::set_section): Allow being called on aliases
	as long as they aren't analyzed yet.

	* gcc.dg/pr90760.c: New test.

From-SVN: r272178
      Jakub Jelinek committed
    • Daily bump. · bfde1e21 
      From-SVN: r272177
      GCC Administrator committed
  3. 11 Jun, 2019 19 commits
  5. 10 Jun, 2019 13 commits