truncdfhf2.c:52:1: internal compiler error: in as_a, at machmode.h:381 #610

abrodkin · 2024-05-08T18:05:35Z

On attempt to compile ARC GNU tools for ARC-V using GCC from https://github.com/foss-for-synopsys-dwc-arc-processors/gcc-arcv/commit/97a9f06441fd59c6f87803ded8410536495d145e got the following ICE.

Consider preprocessed input file truncdfhf2.zip and compile it in the following way:

.../riscv32-elf/build/build-cc-gcc-core/./gcc/xgcc -B.../riscv32-elf/build/build-cc-gcc-core/./gcc/ -g -mcmodel=medlow -O2 truncdfhf2.i -c

during RTL pass: vartrack
.../riscv32-elf/src/gcc/libgcc/soft-fp/truncdfhf2.c: In function '__truncdfhf2':
.../riscv32-elf/src/gcc/libgcc/soft-fp/truncdfhf2.c:52:1: internal compiler error: in as_a, at machmode.h:381
   52 | }
      | ^
0xa99b42 scalar_int_mode as_a<scalar_int_mode>(machine_mode)
        .../riscv32-elf/src/gcc/gcc/machmode.h:381
0xa9a05f scalar_int_mode as_a<scalar_int_mode>(machine_mode)
        .../riscv32-elf/src/gcc/gcc/rtl.h:3213
0xa9a05f num_sign_bit_copies1
        .../riscv32-elf/src/gcc/gcc/rtlanal.cc:5476
0x128543e num_sign_bit_copies1
        .../riscv32-elf/src/gcc/gcc/rtlanal.cc:5669
0x1285231 num_sign_bit_copies1
        .../riscv32-elf/src/gcc/gcc/rtlanal.cc:5527
0x12c99c8 simplify_const_relational_operation(rtx_code, machine_mode, rtx_def*, rtx_def*)
        .../riscv32-elf/src/gcc/gcc/simplify-rtx.cc:6380
0x12c386e simplify_context::simplify_relational_operation(rtx_code, machine_mode, machine_mode, rtx_def*, rtx_def*)
        .../riscv32-elf/src/gcc/gcc/simplify-rtx.cc:5830
0x12c2a24 simplify_relational_operation(rtx_code, machine_mode, machine_mode, rtx_def*, rtx_def*)
        .../riscv32-elf/src/gcc/gcc/rtl.h:3508
0x12c2a24 simplify_rtx(rtx_def const*)
        .../riscv32-elf/src/gcc/gcc/simplify-rtx.cc:7998
0xdffdc7 cselib_expand_value_rtx_1
        .../riscv32-elf/src/gcc/gcc/cselib.cc:2128
0xe0105e cselib_expand_value_rtx_cb(rtx_def*, bitmap_head*, int, rtx_def* (*)(rtx_def*, bitmap_head*, int, void*), void*)
        .../riscv32-elf/src/gcc/gcc/cselib.cc:1836
0x165df17 vt_expand_var_loc_chain
        .../riscv32-elf/src/gcc/gcc/var-tracking.cc:8403
0x165e4e8 vt_expand_loc_callback
        .../riscv32-elf/src/gcc/gcc/var-tracking.cc:8566
0xdfffb1 cselib_expand_value_rtx_1
        .../riscv32-elf/src/gcc/gcc/cselib.cc:1988
0xdffd61 cselib_expand_value_rtx_1
        .../riscv32-elf/src/gcc/gcc/cselib.cc:2026
0xe0105e cselib_expand_value_rtx_cb(rtx_def*, bitmap_head*, int, rtx_def* (*)(rtx_def*, bitmap_head*, int, void*), void*)
        .../riscv32-elf/src/gcc/gcc/cselib.cc:1836
0x165df17 vt_expand_var_loc_chain
        .../riscv32-elf/src/gcc/gcc/var-tracking.cc:8403
0x165e4e8 vt_expand_loc_callback
        .../riscv32-elf/src/gcc/gcc/var-tracking.cc:8566
0xdfffb1 cselib_expand_value_rtx_1
        .../riscv32-elf/src/gcc/gcc/cselib.cc:1988
0xe0105e cselib_expand_value_rtx_cb(rtx_def*, bitmap_head*, int, rtx_def* (*)(rtx_def*, bitmap_head*, int, void*), void*)
        .../riscv32-elf/src/gcc/gcc/cselib.cc:1836
Please submit a full bug report, with preprocessed source (by using -freport-bug).
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.

For the record the following Crosstool-NG (taken from foss-for-synopsys-dwc-arc-processors/crosstool-ng@963a7fb commit) defconfig was used:

CT_CONFIG_VERSION="4"
CT_EXPERIMENTAL=y
CT_PREFIX_DIR="riscv32-unknown-elf"
# CT_LOG_PROGRESS_BAR is not set
CT_ARCH_RISCV=y
CT_ARCH_TUNE="rocket"
CT_OMIT_TARGET_VENDOR=y
CT_MULTILIB=y
CT_ARCH_ARCH="rv32imafd_zicond_zicsr_zifencei_zihintpause_zfa_zfh_zfhmin_zca_zcb_zcf_zcmp_zcmt_zba_zbb_zbc_zbs"
CT_ARCH_ABI="ilp32d"
CT_TARGET_CFLAGS="-Os -mcmodel=medlow"
# CT_SHOW_CT_VERSION is not set
CT_TOOLCHAIN_PKGVERSION="RISC-V elf toolchain - build 6596"
CT_TARGET_ALIAS="riscv32-elf"
CT_BINUTILS_SRC_DEVEL=y
CT_BINUTILS_DEVEL_URL="https://github.com/foss-for-synopsys-dwc-arc-processors/binutils-gdb"
CT_BINUTILS_DEVEL_REVISION="4183914f8d5307d6b0ffe6a47344e546fab3bdf1"
CT_NEWLIB_SRC_DEVEL=y
CT_NEWLIB_DEVEL_URL="https://github.com/foss-for-synopsys-dwc-arc-processors/newlib"
CT_NEWLIB_DEVEL_REVISION="b6a8d03ce1c807ab8f369e819cc46edfe410cbd4"
CT_LIBC_NEWLIB_TARGET_CFLAGS="-O2 -D_POSIX_MODE -ffunction-sections -fdata-sections -Os -mcmodel=medlow"
CT_LIBC_NEWLIB_IO_C99FMT=y
CT_LIBC_NEWLIB_IO_LL=y
CT_LIBC_NEWLIB_IO_FLOAT=y
CT_LIBC_NEWLIB_IO_LDBL=y
CT_LIBC_NEWLIB_REGISTER_FINI=y
CT_GCC_SRC_DEVEL=y
CT_GCC_DEVEL_URL="[email protected]:foss-for-synopsys-dwc-arc-processors/gcc-arcv.git"
CT_GCC_DEVEL_REVISION="97a9f06441fd59c6f87803ded8410536495d145e"
CT_GCC_V_13=y
CT_CC_GCC_CONFIG_TLS=y
# CT_CC_GCC_USE_GRAPHITE is not set
# CT_CC_GCC_ENABLE_TARGET_OPTSPACE is not set
# CT_CC_GCC_TM_CLONE_REGISTRY is not set
CT_CC_LANG_CXX=y
CT_DEBUG_GDB=y
CT_GDB_SRC_DEVEL=y
CT_GDB_DEVEL_URL="https://sourceware.org/git/binutils-gdb.git"
CT_GDB_DEVEL_REVISION="e53a8e8685685c97588f8319d993ea6cd5635e47"
# CT_GDB_CROSS_PYTHON is not set
CT_COMP_LIBS_NEWLIB_NANO=y
CT_NEWLIB_NANO_SRC_DEVEL=y
CT_NEWLIB_NANO_DEVEL_URL="https://github.com/foss-for-synopsys-dwc-arc-processors/newlib"
CT_NEWLIB_NANO_DEVEL_REVISION="b6a8d03ce1c807ab8f369e819cc46edfe410cbd4"
CT_LIBC_NEWLIB_NANO_TARGET_CFLAGS="-Os -ffunction-sections -fdata-sections -Os -mcmodel=medlow"
# CT_LIBC_NEWLIB_NANO_FVWRITE_IN_STREAMIO is not set
# CT_LIBC_NEWLIB_NANO_MULTITHREAD is not set

The text was updated successfully, but these errors were encountered:

abrodkin · 2024-05-08T18:17:10Z

There's a similar issue in the GCC bugzilla: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113637 with the corresponding fix https://gcc.gnu.org/git/gitweb.cgi?p=gcc.git;h=457d2b59b58e5998e1e6967316d4e3e8f24edeed. Which we apparently have in the sources I used for that experiment. So that must be something new.

abrodkin · 2024-05-27T17:37:01Z

Even easier reproduction with any recent GCC:

$ riscv64-elf-gcc -march=rv32imafd_zicsr_zifencei_zihintpause_zicond_zfa_zfh_zca_zcb_zcmt_zcmp_zcf_zba_zbb_zbc_zbs -mabi=ilp32d -O2 -g truncdfhf2.i

during RTL pass: vartrack
../../../libgcc/soft-fp/truncdfhf2.c: In function '__truncdfhf2':
../../../libgcc/soft-fp/truncdfhf2.c:52:1: internal compiler error: in as_a, at machmode.h:381
   52 | }
      | ^
Please submit a full bug report, with preprocessed source (by using -freport-bug).
See <https://gcc.gnu.org/bugs/> for instructions.

shahab-vahedi · 2024-06-19T08:12:21Z

I cannot reproduce this on my end. what's the output of riscv64-elf-gcc -### ?

abrodkin · 2024-06-19T22:21:02Z

I cannot reproduce this on my end. what's the output of riscv64-elf-gcc -### ?

On my attempt to reproduce that problem bumped into a new thing related to how GCC 14.x-based toolchain got built, see #628.

Anyway, just to double-check, have you tried the following command on https://github.com/foss-for-synopsys-dwc-arc-processors/toolchain/files/15253048/truncdfhf2.zip?

$ riscv64-elf-gcc -march=rv32imafd_zicsr_zifencei_zihintpause_zicond_zfa_zfh_zca_zcb_zcmt_zcmp_zcf_zba_zbb_zbc_zbs -mabi=ilp32d -O2 -g truncdfhf2.i

Note that long -march string which really makes a difference.

shahab-vahedi · 2024-06-20T14:16:22Z

still no output of that command for me

kolerov · 2024-06-25T15:12:42Z

@abrodkin I tried the latest engineering build 2024.06-eng004 with this command. I changed imafd to imafc and ilp32d to ilp32f because it is not built with that imafd/ilp32d combination. I didn't face any issue. Note that the latest build uses GCC from https://github.com/foss-for-synopsys-dwc-arc-processors/gcc that is much newer than gcc-arcv.

riscv64-elf-gcc -march=rv32imafc_zicsr_zifencei_zihintpause_zicond_zfa_zfh_zca_zcb_zcmt_zcmp_zcf_zba_zbb_zbc_zbs -mabi=ilp32f -O2 -g -c truncdfhf2.i

abrodkin · 2024-06-25T21:57:26Z

Indeed, with GCC14 the the following happens with old command line:

$ riscv64-elf-gcc -march=rv32imafd_zicsr_zifencei_zihintpause_zicond_zfa_zfh_zca_zcb_zcmt_zcmp_zcf_zba_zbb_zbc_zbs -mabi=ilp32d -O2 -g truncdfhf2.i
riscv64-elf-gcc: fatal error: Cannot find suitable multilib set for '-march=rv32imafd_zicond_zicsr_zifencei_zihintpause_zfa_zfh_zfhmin_zca_zcb_zcf_zcmp_zcmt_zba_zbb_zbc_zbs'/'-mabi=ilp32d'
compilation terminated.

So the following needs to be used:

riscv64-elf-gcc -march=rv32imafc_zicsr_zifencei_zihintpause_zicond_zfa_zfh_zca_zcb_zcmt_zcmp_zcf_zba_zbb_zbc_zbs -mabi=ilp32f -O2 -g -c truncdfhf2.i

kolerov · 2024-06-26T19:31:59Z

Though I could not reproduce the issue, I faced another one with this configuration:

CT_CONFIG_VERSION="4"
CT_EXPERIMENTAL=y
CT_PREFIX_DIR="riscv64-unknown-elf"
# CT_LOG_PROGRESS_BAR is not set
CT_ARCH_RISCV=y
CT_ARCH_TUNE="rocket"
CT_MULTILIB=y
CT_ARCH_64=y
CT_ARCH_ARCH="rv32imafd_zicsr_zifencei_zihintpause_zicond_zfa_zfh_zca_zcb_zcmt_zcmp_zcf_zba_zbb_zbc_zbs"
CT_ARCH_ABI="ilp32d"
CT_TARGET_CFLAGS="-Os"
# CT_SHOW_CT_VERSION is not set
CT_TOOLCHAIN_PKGVERSION="RISC-V elf toolchain - build 6838"
#CT_TARGET_VENDOR="snps"
CT_TARGET_ALIAS="riscv64-elf"
CT_BINUTILS_SRC_DEVEL=y
CT_BINUTILS_DEVEL_URL="https://github.com/foss-for-synopsys-dwc-arc-processors/binutils-gdb.git"
CT_BINUTILS_DEVEL_REVISION="a0ceb30a3a291b7226edd4e209a0f72542722907"
CT_NEWLIB_SRC_DEVEL=y
CT_NEWLIB_DEVEL_URL="https://github.com/foss-for-synopsys-dwc-arc-processors/newlib.git"
CT_NEWLIB_DEVEL_REVISION="caed0fed9a76aab87f93b9e2f0257d3e5d7f8288"
CT_LIBC_NEWLIB_TARGET_CFLAGS="-O2 -D_POSIX_MODE -ffunction-sections -fdata-sections"
CT_LIBC_NEWLIB_IO_C99FMT=y
CT_LIBC_NEWLIB_IO_LL=y
CT_LIBC_NEWLIB_IO_FLOAT=y
CT_LIBC_NEWLIB_IO_LDBL=y
CT_LIBC_NEWLIB_REGISTER_FINI=y
CT_GCC_SRC_DEVEL=y
CT_GCC_DEVEL_URL="https://github.com/foss-for-synopsys-dwc-arc-processors/gcc.git"
CT_GCC_DEVEL_REVISION="01fd9cd939ca8805369aa3a78d5fd6541f286438"
CT_GCC_V_13=y
CT_CC_GCC_MULTILIB_GENERATOR="rv32i-ilp32--;rv32iac-ilp32--;rv32im-ilp32--;rv32imac-ilp32--;rv32imafc-ilp32f--;rv64imac-lp64--;rv64imafdc-lp64d--;"
CT_CC_GCC_CONFIG_TLS=y
# CT_CC_GCC_USE_GRAPHITE is not set
# CT_CC_GCC_ENABLE_TARGET_OPTSPACE is not set
# CT_CC_GCC_TM_CLONE_REGISTRY is not set
CT_CC_LANG_CXX=y
CT_DEBUG_GDB=y
CT_GDB_SRC_DEVEL=y
CT_GDB_DEVEL_URL="https://github.com/foss-for-synopsys-dwc-arc-processors/binutils-gdb.git"
CT_GDB_DEVEL_REVISION="445de3297bb5e53c31e031d6bbd29377f81c06dd"
# CT_GDB_CROSS_PYTHON is not set
CT_COMP_LIBS_NEWLIB_NANO=y
CT_NEWLIB_NANO_SRC_DEVEL=y
CT_NEWLIB_NANO_DEVEL_URL="https://github.com/foss-for-synopsys-dwc-arc-processors/newlib.git"
CT_NEWLIB_NANO_DEVEL_REVISION="caed0fed9a76aab87f93b9e2f0257d3e5d7f8288"
CT_LIBC_NEWLIB_NANO_TARGET_CFLAGS="-Os -ffunction-sections -fdata-sections"
# CT_LIBC_NEWLIB_NANO_FVWRITE_IN_STREAMIO is not set
# CT_LIBC_NEWLIB_NANO_MULTITHREAD is not set

To reproduce this file may be used (libm_a-er_lgamma.zip):

$ riscv64-unknown-elf-cc -fno-builtin -march=rv32id_zfa -mabi=ilp32  -mtune=rocket -c libm_a-er_lgamma.i -o libm_a-er_lgamma.o -Os -g
during RTL pass: vartrack
/home/ykolerov/workspace/development/riscv/github-610/build/.build/riscv64-unknown-elf/src/newlib/newlib/libm/math/er_lgamma.c: In function '__ieee754_lgamma_r':
/home/ykolerov/workspace/development/riscv/github-610/build/.build/riscv64-unknown-elf/src/newlib/newlib/libm/math/er_lgamma.c:319:1: internal compiler error: in simplify_const_unary_operation, at simplify-rtx.cc:2291
  319 | }
      | ^
0x9fb419 simplify_const_unary_operation(rtx_code, machine_mode, rtx_def*, machine_mode)
        /home/ykolerov/workspace/development/riscv/github-610/build/.build/riscv64-unknown-elf/src/gcc/gcc/simplify-rtx.cc:2291
0x1045d81 simplify_context::simplify_unary_operation(rtx_code, machine_mode, rtx_def*, machine_mode)
        /home/ykolerov/workspace/development/riscv/github-610/build/.build/riscv64-unknown-elf/src/gcc/gcc/simplify-rtx.cc:889
0x1045d81 simplify_context::simplify_gen_unary(rtx_code, machine_mode, rtx_def*, machine_mode)
        /home/ykolerov/workspace/development/riscv/github-610/build/.build/riscv64-unknown-elf/src/gcc/gcc/simplify-rtx.cc:360
0x10461a5 simplify_context::simplify_truncation(machine_mode, rtx_def*, machine_mode)
        /home/ykolerov/workspace/development/riscv/github-610/build/.build/riscv64-unknown-elf/src/gcc/gcc/simplify-rtx.cc:652
0x1044d70 simplify_context::simplify_unary_operation_1(rtx_code, machine_mode, rtx_def*)
        /home/ykolerov/workspace/development/riscv/github-610/build/.build/riscv64-unknown-elf/src/gcc/gcc/simplify-rtx.cc:1232
0x1041bb1 simplify_context::simplify_unary_operation(rtx_code, machine_mode, rtx_def*, machine_mode)
        /home/ykolerov/workspace/development/riscv/github-610/build/.build/riscv64-unknown-elf/src/gcc/gcc/simplify-rtx.cc:893
0x1041bb1 simplify_unary_operation(rtx_code, machine_mode, rtx_def*, machine_mode)
        /home/ykolerov/workspace/development/riscv/github-610/build/.build/riscv64-unknown-elf/src/gcc/gcc/rtl.h:3486
0x1041bb1 simplify_rtx(rtx_def const*)
        /home/ykolerov/workspace/development/riscv/github-610/build/.build/riscv64-unknown-elf/src/gcc/gcc/simplify-rtx.cc:7979
0xbe9eaf cselib_expand_value_rtx_1
        /home/ykolerov/workspace/development/riscv/github-610/build/.build/riscv64-unknown-elf/src/gcc/gcc/cselib.cc:2128
0xbebad2 cselib_expand_value_rtx_cb(rtx_def*, bitmap_head*, int, rtx_def* (*)(rtx_def*, bitmap_head*, int, void*), void*)
        /home/ykolerov/workspace/development/riscv/github-610/build/.build/riscv64-unknown-elf/src/gcc/gcc/cselib.cc:1836
0x136b608 vt_expand_var_loc_chain
        /home/ykolerov/workspace/development/riscv/github-610/build/.build/riscv64-unknown-elf/src/gcc/gcc/var-tracking.cc:8403
0x136c796 vt_expand_loc_callback
        /home/ykolerov/workspace/development/riscv/github-610/build/.build/riscv64-unknown-elf/src/gcc/gcc/var-tracking.cc:8566
0xbea0ec cselib_expand_value_rtx_1
        /home/ykolerov/workspace/development/riscv/github-610/build/.build/riscv64-unknown-elf/src/gcc/gcc/cselib.cc:1988
0xbe9e49 cselib_expand_value_rtx_1
        /home/ykolerov/workspace/development/riscv/github-610/build/.build/riscv64-unknown-elf/src/gcc/gcc/cselib.cc:2026
0xbebad2 cselib_expand_value_rtx_cb(rtx_def*, bitmap_head*, int, rtx_def* (*)(rtx_def*, bitmap_head*, int, void*), void*)
        /home/ykolerov/workspace/development/riscv/github-610/build/.build/riscv64-unknown-elf/src/gcc/gcc/cselib.cc:1836
0x136b608 vt_expand_var_loc_chain
        /home/ykolerov/workspace/development/riscv/github-610/build/.build/riscv64-unknown-elf/src/gcc/gcc/var-tracking.cc:8403
0x136c796 vt_expand_loc_callback
        /home/ykolerov/workspace/development/riscv/github-610/build/.build/riscv64-unknown-elf/src/gcc/gcc/var-tracking.cc:8566
0xbea0ec cselib_expand_value_rtx_1
        /home/ykolerov/workspace/development/riscv/github-610/build/.build/riscv64-unknown-elf/src/gcc/gcc/cselib.cc:1988
0xbebad2 cselib_expand_value_rtx_cb(rtx_def*, bitmap_head*, int, rtx_def* (*)(rtx_def*, bitmap_head*, int, void*), void*)
        /home/ykolerov/workspace/development/riscv/github-610/build/.build/riscv64-unknown-elf/src/gcc/gcc/cselib.cc:1836
0x136b608 vt_expand_var_loc_chain
        /home/ykolerov/workspace/development/riscv/github-610/build/.build/riscv64-unknown-elf/src/gcc/gcc/var-tracking.cc:8403
Please submit a full bug report, with preprocessed source (by using -freport-bug).
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.

If -g or _zfa is removed from options, this issue disappears. I will report this bug to GCC, but that means that RISC-V toolchain is not ready yet for building the a toolchain with complex combinations of extensions.

kolerov · 2024-07-03T08:39:26Z

I marked this issue as related to non-Synopsys code. Moreover, this bug requires a further investigation that does not fit in this release. A temporary workaround is building a toolchain without complex configurations or try to find a configuration that leads to a successful building of a toolchain.

abrodkin · 2024-07-03T12:55:50Z

@kolerov that needs to go into known issues so that our users are aware of that. Also would be super nice to file an upstream bug for that.

kolerov · 2024-07-03T14:03:48Z

@abrodkin I mentioned this issue as known in 2024.06 RC1 release notes.

abrodkin added bug component: gcc arc-v Issues related to RISC-V-based ARC-V processors labels May 8, 2024

abrodkin assigned shahab-vahedi May 8, 2024

abrodkin added this to the 2024.06 milestone Jun 19, 2024

abrodkin assigned kolerov Jun 25, 2024

shahab-vahedi assigned artemiy-volkov and kolerov and unassigned kolerov Jun 25, 2024

kolerov added the general Issues related to non-Synopsys code label Jul 3, 2024

kolerov removed this from the 2024.06 milestone Jul 3, 2024

abrodkin added the release notes Items to mention in release notes label Jul 3, 2024

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truncdfhf2.c:52:1: internal compiler error: in as_a, at machmode.h:381 #610

truncdfhf2.c:52:1: internal compiler error: in as_a, at machmode.h:381 #610

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truncdfhf2.c:52:1: internal compiler error: in as_a, at machmode.h:381 #610

truncdfhf2.c:52:1: internal compiler error: in as_a, at machmode.h:381 #610

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