From: Jan-Benedict Glaw <jbglaw@lug-owl.de>
To: Takayuki 'January June' Suwa <jjsuwa_sys3175@yahoo.co.jp>
Cc: GCC Patches <gcc-patches@gcc.gnu.org>
Subject: Re: [PATCH v3] xtensa: Prepare the transition from Reload to LRA
Date: Tue, 25 Oct 2022 22:09:57 +0200 [thread overview]
Message-ID: <20221025200957.v5yjre2fsbxqby43@lug-owl.de> (raw)
In-Reply-To: <3054719f-6688-211c-da07-93c0fbf7c038@yahoo.co.jp>
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Hi!
On Wed, 2022-10-19 17:16:24 +0900, Takayuki 'January June' Suwa via Gcc-patches <gcc-patches@gcc.gnu.org> wrote:
> * gcc/config/xtensa/xtensa.md: Add two new split patterns:
> - splits DImode immediate load into two SImode ones
> - puts out-of-constraint SImode constants into the constant pool
> --- a/gcc/config/xtensa/xtensa.md
> +++ b/gcc/config/xtensa/xtensa.md
> @@ -940,14 +940,9 @@
> because of offering further optimization opportunities. */
> if (register_operand (operands[0], DImode))
> {
> - rtx lowpart, highpart;
> -
> - if (TARGET_BIG_ENDIAN)
> - split_double (operands[1], &highpart, &lowpart);
> - else
> - split_double (operands[1], &lowpart, &highpart);
> - emit_insn (gen_movsi (gen_lowpart (SImode, operands[0]), lowpart));
> - emit_insn (gen_movsi (gen_highpart (SImode, operands[0]), highpart));
> + xtensa_split_DI_reg_imm (operands);
> + emit_move_insn (operands[0], operands[1]);
> + emit_move_insn (operands[2], operands[3]);
This results in a new warning for me:
[all 2022-10-25 16:04:19] g++ -fno-PIE -c -g -O2 -DIN_GCC -DCROSS_DIRECTORY_STRUCTURE -fno-exceptions -fno-rtti -fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual -Wmissing-format-attribute -Woverloaded-virtual -pedantic -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -Werror -fno-common -DHAVE_CONFIG_H -I. -I. -I../../gcc/gcc -I../../gcc/gcc/. -I../../gcc/gcc/../include -I../../gcc/gcc/../libcpp/include -I../../gcc/gcc/../libcody -I../../gcc/gcc/../libdecnumber -I../../gcc/gcc/../libdecnumber/dpd -I../libdecnumber -I../../gcc/gcc/../libbacktrace -o insn-emit.o -MT insn-emit.o -MMD -MP -MF ./.deps/insn-emit.TPo insn-emit.cc
[all 2022-10-25 16:04:22] ../../gcc/gcc/config/xtensa/xtensa.md: In function 'rtx_def* gen_movdi(rtx, rtx)':
[all 2022-10-25 16:04:22] ../../gcc/gcc/config/xtensa/xtensa.md:945:26: error: array subscript 3 is above array bounds of 'rtx_def* [2]' [-Werror=array-bounds]
[all 2022-10-25 16:04:22] 945 | emit_move_insn (operands[2], operands[3]);
[all 2022-10-25 16:04:22] | ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
[all 2022-10-25 16:04:22] ../../gcc/gcc/config/xtensa/xtensa.md:897:9: note: while referencing 'operands'
[all 2022-10-25 16:04:22] 897 | (set_attr "mode" "SF")
[all 2022-10-25 16:04:22] | ^~~~~~~~
[all 2022-10-25 16:04:22] ../../gcc/gcc/config/xtensa/xtensa.md:945:26: error: array subscript 2 is above array bounds of 'rtx_def* [2]' [-Werror=array-bounds]
[all 2022-10-25 16:04:22] 945 | emit_move_insn (operands[2], operands[3]);
[all 2022-10-25 16:04:22] | ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
[all 2022-10-25 16:04:22] ../../gcc/gcc/config/xtensa/xtensa.md:897:9: note: while referencing 'operands'
[all 2022-10-25 16:04:22] 897 | (set_attr "mode" "SF")
[all 2022-10-25 16:04:22] | ^~~~~~~~
I didn't yet actually check the warning, it may be bogus.
Thanks,
Jan-Benedict
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next prev parent reply other threads:[~2022-10-25 20:09 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-03 1:35 [PATCH] lower-subreg, expr: Mitigate inefficiencies derived from "(clobber (reg X))" followed by "(set (subreg (reg X)) (...))" Takayuki 'January June' Suwa
2022-08-03 7:52 ` Richard Sandiford
2022-08-03 11:17 ` Takayuki 'January June' Suwa
2022-08-04 9:49 ` Richard Sandiford
2022-08-04 12:35 ` Takayuki 'January June' Suwa
2022-08-05 16:20 ` Jeff Law
2022-10-14 11:06 ` [PATCH] xtensa: Prepare the transition from Reload to LRA Takayuki 'January June' Suwa
2022-10-16 5:03 ` Max Filippov
2022-10-18 2:57 ` [PATCH v2] " Takayuki 'January June' Suwa
2022-10-18 3:14 ` Max Filippov
2022-10-18 12:16 ` Max Filippov
2022-10-19 8:16 ` [PATCH v3] " Takayuki 'January June' Suwa
2022-10-19 11:31 ` Max Filippov
2022-10-25 20:09 ` Jan-Benedict Glaw [this message]
2022-10-26 3:23 ` Takayuki 'January June' Suwa
2022-10-26 6:27 ` [PATCH] xtensa: Fix out-of-bounds array access Takayuki 'January June' Suwa
2022-10-26 17:05 ` Max Filippov
2022-08-05 16:12 ` [PATCH] lower-subreg, expr: Mitigate inefficiencies derived from "(clobber (reg X))" followed by "(set (subreg (reg X)) (...))" Jeff Law
2022-08-03 17:23 ` Jeff Law
2022-08-04 9:39 ` Richard Sandiford
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