[Bug target/99829] MVE: ICE in lra_assign at -O3

["thiago.bauermann at linaro dot org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99829

Thiago Jung Bauermann <thiago.bauermann at linaro dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |thiago.bauermann at linaro dot org

--- Comment #2 from Thiago Jung Bauermann <thiago.bauermann at linaro dot org> ---
We are still seeing this ICE in the Linaro CI:

spawn -ignore SIGHUP /path/to/install/bin/arm-eabi-g++
/path/to/gcc.git/gcc/testsuite/c-c++-common/torture/vshuf-v16qi.c -mthumb
-march=armv8.1-m.main+mve.fp+fp.dp -mtune=cortex-m55 -mfloat-abi=hard
-mfpu=auto -fdiagnostics-plain-output -nostdinc++
-I/path/to/builds/x86_64-pc-linux-gnu/arm-eabi/gcc-gcc.git~master-stage2/arm-eabi/libstdc++-v3/include/arm-eabi
-I/path/to/builds/x86_64-pc-linux-gnu/arm-eabi/gcc-gcc.git~master-stage2/arm-eabi/libstdc++-v3/include
-I/path/to/gcc.git/libstdc++-v3/libsupc++
-I/path/to/gcc.git/libstdc++-v3/include/backward
-I/path/to/gcc.git/libstdc++-v3/testsuite/util -fmessage-length=0 -O3 -g -S -o
vshuf-v16qi.s
during RTL pass: reload
In file included from
/path/to/gcc.git/gcc/testsuite/c-c++-common/torture/vshuf-v16qi.c:5:
/path/to/gcc.git/gcc/testsuite/c-c++-common/torture/vshuf-main.inc: In function
'int main()':
/path/to/gcc.git/gcc/testsuite/c-c++-common/torture/vshuf-main.inc:26:1:
internal compiler error: in lra_assign, at lra-assigns.cc:1657
0x10c07d1 lra_assign(bool&)
        ../../../../../../gcc/gcc/lra-assigns.cc:1657
0x10ba784 lra(_IO_FILE*, int)
        ../../../../../../gcc/gcc/lra.cc:2493
0x106fa8f do_reload
        ../../../../../../gcc/gcc/ira.cc:5973
0x106fa8f execute
        ../../../../../../gcc/gcc/ira.cc:6161
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.
compiler exited with status 1

This is with trunk from March 8, commit cebbaa2a8458 ("[PR113790][LRA]: Fixing
LRA ICE on riscv64")

The same problem also happens in other related tests:

FAIL: c-c++-common/torture/vshuf-v2di.c -O3 -g  (internal compiler error: in
lra_assign, at lra-assigns.cc:1657)
FAIL: c-c++-common/torture/vshuf-v4sf.c -O3 -g  (internal compiler error: in
lra_assign, at lra-assigns.cc:1657)
FAIL: c-c++-common/torture/vshuf-v4si.c -O3 -g  (internal compiler error: in
lra_assign, at lra-assigns.cc:1657)
FAIL: c-c++-common/torture/vshuf-v8hi.c -O3 -g  (internal compiler error: in
lra_assign, at lra-assigns.cc:1657)

GCC is configured with:

/path/to/gcc.git/configure \
    SHELL=/bin/bash \
    --with-mpc=/path/to/install \
    --with-mpfr=/path/to/install \
    --with-gmp=/path/to/install \
    --with-gnu-as \
    --with-gnu-ld \
    --disable-libmudflap \
    --enable-lto \
    --enable-shared \
    --without-included-gettext \
    --enable-nls \
    --with-system-zlib \
    --disable-sjlj-exceptions \
    --enable-gnu-unique-object \
    --enable-linker-build-id \
    --disable-libstdcxx-pch \
    --enable-c99 \
    --enable-clocale=gnu \
    --enable-libstdcxx-debug \
    --enable-long-long \
    --with-cloog=no \
    --with-ppl=no \
    --with-isl=no \
    --enable-threads=no \
    --disable-multiarch \
    --disable-multilib \
    --with-mode=thumb \
    --with-arch=armv8.1-m.main+mve.fp+fp.dp \
    --with-float=hard \
    --with-sysroot=/path/to/install/arm-eabi \
    --with-headers=yes \
    --with-native-system-header-dir=/include \
    --with-newlib \
    --enable-checking=yes \
    --disable-bootstrap \
    --enable-languages=c,c++,lto \
    --prefix=/path/to/install \
    --build=x86_64-pc-linux-gnu \
    --host=x86_64-pc-linux-gnu \
    --target=arm-eabi