[Bug target/94576] New: Regression build newlib for Arm64

[Bug target/94576] New: Regression build newlib for Arm64

[trass3r at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94576

            Bug ID: 94576
           Summary: Regression build newlib for Arm64
           Product: gcc
           Version: 10.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: trass3r at gmail dot com
  Target Milestone: ---

https://github.com/Trass3r/bleeding-edge-toolchain/runs/581839696

arm-none-eabi-gcc
-B/mnt/host/buildNative/newlib-3.1.0-nano/arm-none-eabi/thumb/v8.1-m.main+mve/hard/newlib/
-isystem
/mnt/host/buildNative/newlib-3.1.0-nano/arm-none-eabi/thumb/v8.1-m.main+mve/hard/newlib/targ-include
-isystem /mnt/host/sources/newlib-3.1.0/newlib/libc/include
-B/mnt/host/buildNative/newlib-3.1.0-nano/arm-none-eabi/thumb/v8.1-m.main+mve/hard/libgloss/arm
-L/mnt/host/buildNative/newlib-3.1.0-nano/arm-none-eabi/thumb/v8.1-m.main+mve/hard/libgloss/libnosys
-L/mnt/host/sources/newlib-3.1.0/libgloss/arm  -mthumb
-march=armv8.1-m.main+mve -mfloat-abi=hard -DPACKAGE_NAME=\"newlib\"
-DPACKAGE_TARNAME=\"newlib\" -DPACKAGE_VERSION=\"3.1.0\"
-DPACKAGE_STRING=\"newlib\ 3.1.0\" -DPACKAGE_BUGREPORT=\"\" -DPACKAGE_URL=\"\"
-I. -I/mnt/host/sources/newlib-3.1.0/newlib/libc/stdlib -fno-builtin
-D__NO_SYSCALLS__ -D_COMPILING_NEWLIB -DHAVE_INIT_FINI      -Os -pipe
-ffunction-sections -fdata-sections   -mthumb -march=armv8.1-m.main+mve
-mfloat-abi=hard -c -o lib_a-dtoa.o
/mnt/host/sources/newlib-3.1.0/newlib/libc/stdlib/dtoa.c

during RTL pass: reload
/mnt/host/sources/newlib-3.1.0/newlib/libc/stdlib/dtoa.c: In function
'_dtoa_r':
/mnt/host/sources/newlib-3.1.0/newlib/libc/stdlib/dtoa.c:858:1: internal
compiler error: maximum number of generated reload insns per insn achieved (90)
  858 | }
      | ^

Here's the function:
https://sourceware.org/git/?p=newlib-cygwin.git;a=blob;f=newlib/libc/stdlib/dtoa.c;h=c38f37afd014793a3e6604d94f7cf3a212fe1089;hb=572687310059534b2da9428ca19df992509c8a5d#l177

Last known working gcc version was from Apr 6, 2020, 3:55 PM GMT+2

[Bug target/94576] Regression build newlib for Arm64

[trass3r at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94576

--- Comment #1 from Trass3r <trass3r at gmail dot com> ---
Looks like it also happens with newlib-3.3:
https://github.com/Trass3r/bleeding-edge-toolchain/runs/582133302

[Bug target/94576] Regression build newlib for Arm64

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94576

Martin Liška <marxin at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |WAITING
   Last reconfirmed|                            |2020-04-14
                 CC|                            |marxin at gcc dot gnu.org
     Ever confirmed|0                           |1

--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Can you please attach pre-processed source file (-E option) and output of -v
option for the problematic object file?

[Bug target/94576] Regression build newlib for Arm64

[clyon at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94576

Christophe Lyon <clyon at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |clyon at gcc dot gnu.org

--- Comment #3 from Christophe Lyon <clyon at gcc dot gnu.org> ---
The title and target mention arm64/aarch64 but your description uses
arm-none-eabi-gcc, so it looks like the problem is when arm/aarch32 code.

Could you clarify?

There was a regression last week on aarch64 while building newlib, but it was a
different error it seems:
https://gcc.gnu.org/pipermail/gcc-patches/2020-April/543668.html
and it was fixed by:
https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=a615ea71bc8fbf31b9bc71cb373a7ca5b9cca44a

[Bug target/94576] Regression build newlib for Arm64

[trass3r at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94576

--- Comment #4 from Trass3r <trass3r at gmail dot com> ---
Created attachment 48268
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=48268&action=edit
preprocessed source

It's -march=armv8.1-m.main+mve. arm-none-eabi is just the configured target
name which hasn't been adapted.

-v output:

Using built-in specs.
COLLECT_GCC=./installNative/bin/arm-none-eabi-gcc
Target: arm-none-eabi
Configured with:
/mnt/c/Code/bleeding-edge-toolchain/build/sources/gcc-master/configure
--enable-languages=c --without-headers --target=arm-none-eabi
--prefix=/mnt/c/Code/bleeding-edge-toolchain/build/installNative
--libexecdir=/mnt/c/Code/bleeding-edge-toolchain/build/installNative/lib
--disable-decimal-float --disable-libffi --disable-libgomp --disable-libmudflap
--disable-libquadmath --disable-libssp --disable-libstdcxx-pch --disable-nls
--disable-shared --disable-threads --disable-tls --with-newlib --with-gnu-as
--with-gnu-ld
--with-sysroot=/mnt/c/Code/bleeding-edge-toolchain/build/installNative/arm-none-eabi
--with-system-zlib
--with-gmp=/mnt/c/Code/bleeding-edge-toolchain/build/buildNative/prerequisites/gmp-6.2.0
--with-mpfr=/mnt/c/Code/bleeding-edge-toolchain/build/buildNative/prerequisites/mpfr-4.0.2
--with-mpc=/mnt/c/Code/bleeding-edge-toolchain/build/buildNative/prerequisites/mpc-1.1.0
--with-isl=/mnt/c/Code/bleeding-edge-toolchain/build/buildNative/prerequisites/isl-0.22.1
--with-pkgversion=heads/master-0-gdecb4a8 --with-multilib-list=rmprofile
Thread model: single
Supported LTO compression algorithms: zlib
gcc version 10.0.1 20200414 (experimental) (heads/master-0-gdecb4a8)
COLLECT_GCC_OPTIONS='-B'
'/mnt/c/Code/bleeding-edge-toolchain/build/buildNative/newlib-3.3.0-nano/arm-none-eabi/thumb/v8.1-m.main+mve/hard/newlib/'
'-isystem'
'/mnt/c/Code/bleeding-edge-toolchain/build/buildNative/newlib-3.3.0-nano/arm-none-eabi/thumb/v8.1-m.main+mve/hard/newlib/targ-include'
'-isystem'
'/mnt/c/Code/bleeding-edge-toolchain/build/sources/newlib-3.3.0/newlib/libc/include'
'-B'
'/mnt/c/Code/bleeding-edge-toolchain/build/buildNative/newlib-3.3.0-nano/arm-none-eabi/thumb/v8.1-m.main+mve/hard/libgloss/arm'
'-L/mnt/c/Code/bleeding-edge-toolchain/build/buildNative/newlib-3.3.0-nano/arm-none-eabi/thumb/v8.1-m.main+mve/hard/libgloss/libnosys'
'-L/mnt/c/Code/bleeding-edge-toolchain/build/sources/newlib-3.3.0/libgloss/arm'
'-mfloat-abi=hard' '-D' 'PACKAGE_NAME="newlib"' '-D' 'PACKAGE_TARNAME="newlib"'
'-D' 'PACKAGE_VERSION="3.3.0"' '-D' 'PACKAGE_STRING="newlib 3.3.0"' '-D'
'PACKAGE_BUGREPORT=""' '-D' 'PACKAGE_URL=""' '-I' '.' '-I'
'/mnt/c/Code/bleeding-edge-toolchain/build/sources/newlib-3.3.0/newlib/libc/stdlib'
'-fno-builtin' '-D' '__NO_SYSCALLS__' '-D' '_COMPILING_NEWLIB' '-D'
'HAVE_INIT_FINI' '-Os' '-pipe' '-ffunction-sections' '-fdata-sections'
'-mthumb'  '-mfloat-abi=hard' '-c' '-o' 'lib_a-dtoa.o' '-v'
'-march=armv8.1-m.main+mve'

/mnt/c/Code/bleeding-edge-toolchain/build/installNative/lib/gcc/arm-none-eabi/10.0.1/cc1
-quiet -v -I . -I
/mnt/c/Code/bleeding-edge-toolchain/build/sources/newlib-3.3.0/newlib/libc/stdlib
-imultilib thumb/v8.1-m.main+mve/hard -D__USES_INITFINI__ -D
PACKAGE_NAME="newlib" -D PACKAGE_TARNAME="newlib" -D PACKAGE_VERSION="3.3.0" -D
PACKAGE_STRING="newlib 3.3.0" -D PACKAGE_BUGREPORT="" -D PACKAGE_URL="" -D
__NO_SYSCALLS__ -D _COMPILING_NEWLIB -D HAVE_INIT_FINI -isystem
/mnt/c/Code/bleeding-edge-toolchain/build/buildNative/newlib-3.3.0-nano/arm-none-eabi/thumb/v8.1-m.main+mve/hard/newlib/targ-include
-isystem
/mnt/c/Code/bleeding-edge-toolchain/build/sources/newlib-3.3.0/newlib/libc/include
/mnt/c/Code/bleeding-edge-toolchain/build/sources/newlib-3.3.0/newlib/libc/stdlib/dtoa.c
-quiet -dumpbase dtoa.c -mfloat-abi=hard -mthumb -mfloat-abi=hard
-march=armv8.1-m.main+mve -auxbase-strip lib_a-dtoa.o -Os -version -fno-builtin
-ffunction-sections -fdata-sections -o - |

/mnt/c/Code/bleeding-edge-toolchain/build/installNative/lib/gcc/arm-none-eabi/10.0.1/../../../../arm-none-eabi/bin/as
-v -I . -I
/mnt/c/Code/bleeding-edge-toolchain/build/sources/newlib-3.3.0/newlib/libc/stdlib
-march=armv8.1-m.main+mve -mfloat-abi=hard -mfloat-abi=hard -meabi=5 -o
lib_a-dtoa.o
GNU assembler version 2.34.50 (arm-none-eabi) using BFD version
(heads/master-0-gdecb4a8) 2.34.50.20200414
GNU C17 (heads/master-0-gdecb4a8) version 10.0.1 20200414 (experimental)
(arm-none-eabi)
        compiled by GNU C version 9.2.1 20191008, GMP version 6.2.0, MPFR
version 4.0.2, MPC version 1.1.0, isl version isl-0.22.1-GMP

GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
ignoring nonexistent directory
"/mnt/c/Code/bleeding-edge-toolchain/build/installNative/arm-none-eabi/usr/local/include"
ignoring nonexistent directory
"/mnt/c/Code/bleeding-edge-toolchain/build/installNative/lib/gcc/arm-none-eabi/10.0.1/../../../../arm-none-eabi/include"
ignoring nonexistent directory
"/mnt/c/Code/bleeding-edge-toolchain/build/installNative/arm-none-eabi/usr/include"
#include "..." search starts here:
#include <...> search starts here:
 .

/mnt/c/Code/bleeding-edge-toolchain/build/sources/newlib-3.3.0/newlib/libc/stdlib

/mnt/c/Code/bleeding-edge-toolchain/build/buildNative/newlib-3.3.0-nano/arm-none-eabi/thumb/v8.1-m.main+mve/hard/newlib/targ-include

/mnt/c/Code/bleeding-edge-toolchain/build/sources/newlib-3.3.0/newlib/libc/include

/mnt/c/Code/bleeding-edge-toolchain/build/installNative/lib/gcc/arm-none-eabi/10.0.1/include

/mnt/c/Code/bleeding-edge-toolchain/build/installNative/lib/gcc/arm-none-eabi/10.0.1/include-fixed
End of search list.
GNU C17 (heads/master-0-gdecb4a8) version 10.0.1 20200414 (experimental)
(arm-none-eabi)
        compiled by GNU C version 9.2.1 20191008, GMP version 6.2.0, MPFR
version 4.0.2, MPC version 1.1.0, isl version isl-0.22.1-GMP

GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
Compiler executable checksum: 05c35768bf3e95c0bfa673dce95ff527
during RTL pass: reload
/mnt/c/Code/bleeding-edge-toolchain/build/sources/newlib-3.3.0/newlib/libc/stdlib/dtoa.c:
In function '_dtoa_r':
/mnt/c/Code/bleeding-edge-toolchain/build/sources/newlib-3.3.0/newlib/libc/stdlib/dtoa.c:858:1:
internal compiler error: maximum number of generated reload insns per insn
achieved (90)

[Bug target/94576] Regression build newlib for Arm

[clyon at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94576

Christophe Lyon <clyon at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Target|aarch64                     |arm
            Summary|Regression build newlib for |Regression build newlib for
                   |Arm64                       |Arm

--- Comment #5 from Christophe Lyon <clyon at gcc dot gnu.org> ---
(In reply to Trass3r from comment #4)

> It's -march=armv8.1-m.main+mve. arm-none-eabi is just the configured target
> name which hasn't been adapted.
> 

Yes, I saw that, so it's definitely arm/aarch32 mode, *not* arm64/aarch64.

You are using armv8.1-m architecture in aarch32 mode.

[Bug target/94576] Regression build newlib for Arm

[trass3r at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94576

Trass3r <trass3r at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |RESOLVED
         Resolution|---                         |FIXED

--- Comment #6 from Trass3r <trass3r at gmail dot com> ---
Looks like it's been fixed already?
https://github.com/Trass3r/bleeding-edge-toolchain/actions/runs/82552193