Bump QEMU to v8.1.0

[patrick-rivos]

QEMU v7.1.0 has an issue with some vector instructions. This manifests in the (trunk) GCC testsuite with failures like this:

qemu-riscv64: ../../qemu/target/riscv/translate.c:211: decode_save_opc: Assertion `ctx->insn_start != NULL' failed.
/scratch/tc-testing/colab-trunk/build-rv64gcv/../scripts/wrapper/qemu/riscv64-unknown-linux-gnu-run: line 15: 267862 Segmentation fault      (core dumped) QEMU_CPU="$(march-to-cpu-opt --get-riscv-tag $1)" qemu-riscv$xlen -r 5.10 "${qemu_args[@]}" -L ${RISC_V_SYSROOT} "$@"
FAIL: gcc.target/riscv/rvv/autovec/gather-scatter/scatter_store_run-3.c execution test

Bumping to v8.1.0 resolves these failures.

[kito-cheng]

Oh, yeah, IIRC I hit that some where before and then I bump my local qemu to latest, but seems like I never create PR to bump that. also this gcc fix are necessary for bare-metal testing, but anyway I am fine to bump that first.

Anyway, LGTM :P

[patrick-rivos]

Looks like this causes a few newlib failures - I'll look into why

/home/runner/work/riscv-gnu-toolchain/riscv-gnu-toolchain/scripts/testsuite-filter gcc newlib /home/runner/work/riscv-gnu-toolchain/riscv-gnu-toolchain/test/allowlist `find build-gcc-newlib-stage2/gcc/testsuite/ -name *.sum |paste -sd "," -`
		=== gcc: Unexpected fails for rv32gc ilp32d medlow ===
FAIL: gcc.c-torture/execute/20000822-1.c   -O0  execution test
FAIL: gcc.c-torture/execute/20000822-1.c   -O1  execution test
FAIL: gcc.c-torture/execute/20000822-1.c   -O2  execution test
FAIL: gcc.c-torture/execute/20000822-1.c   -O2 -flto -fno-use-linker-plugin -flto-partition=none  execution test
FAIL: gcc.c-torture/execute/20000822-1.c   -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects  execution test
FAIL: gcc.c-torture/execute/20000822-1.c   -O3 -g  execution test
FAIL: gcc.c-torture/execute/20000822-1.c   -Os  execution test
FAIL: gcc.c-torture/execute/921215-1.c   -O0  execution test
FAIL: gcc.c-torture/execute/931002-1.c   -O0  execution test
FAIL: gcc.c-torture/execute/nestfunc-1.c   -O0  execution test
FAIL: gcc.c-torture/execute/nestfunc-2.c   -O0  execution test
FAIL: gcc.c-torture/execute/nestfunc-3.c   -O0  execution test
FAIL: gcc.c-torture/execute/nestfunc-3.c   -O1  execution test
FAIL: gcc.c-torture/execute/nestfunc-3.c   -O2  execution test
FAIL: gcc.c-torture/execute/nestfunc-3.c   -O2 -flto -fno-use-linker-plugin -flto-partition=none  execution test
FAIL: gcc.c-torture/execute/nestfunc-3.c   -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects  execution test
FAIL: gcc.c-torture/execute/nestfunc-3.c   -O3 -fomit-frame-pointer -funroll-loops -fpeel-loops -ftracer -finline-functions  execution test
FAIL: gcc.c-torture/execute/nestfunc-3.c   -O3 -g  execution test
FAIL: gcc.c-torture/execute/nestfunc-3.c   -Os  execution test
FAIL: gcc.c-torture/execute/nestfunc-5.c   -O0  execution test
FAIL: gcc.c-torture/execute/nestfunc-5.c   -O1  execution test
FAIL: gcc.c-torture/execute/nestfunc-5.c   -O2  execution test
FAIL: gcc.c-torture/execute/nestfunc-5.c   -O2 -flto -fno-use-linker-plugin -flto-partition=none  execution test
FAIL: gcc.c-torture/execute/nestfunc-5.c   -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects  execution test
FAIL: gcc.c-torture/execute/nestfunc-5.c   -O3 -g  execution test
FAIL: gcc.c-torture/execute/nestfunc-5.c   -Os  execution test
FAIL: gcc.c-torture/execute/nestfunc-6.c   -O0  execution test
FAIL: gcc.c-torture/execute/nestfunc-6.c   -O1  execution test
FAIL: gcc.c-torture/execute/nestfunc-6.c   -O2  execution test
FAIL: gcc.c-torture/execute/nestfunc-6.c   -O2 -flto -fno-use-linker-plugin -flto-partition=none  execution test
FAIL: gcc.c-torture/execute/nestfunc-6.c   -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects  execution test
FAIL: gcc.c-torture/execute/nestfunc-6.c   -O3 -g  execution test
FAIL: gcc.c-torture/execute/nestfunc-6.c   -Os  execution test
FAIL: gcc.dg/trampoline-1.c execution test
FAIL: gcc.dg/torture/pr86389.c   -O0  execution test
FAIL: gcc.dg/torture/pr86389.c   -O1  execution test
FAIL: gcc.dg/torture/pr86389.c   -O2  execution test
FAIL: gcc.dg/torture/pr86389.c   -O2 -flto -fno-use-linker-plugin -flto-partition=none  execution test
FAIL: gcc.dg/torture/pr86389.c   -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects  execution test
FAIL: gcc.dg/torture/pr86389.c   -O3 -g  execution test
FAIL: gcc.dg/torture/pr86389.c   -Os  execution test
FAIL: gcc.dg/torture/stackalign/nested-5.c   -O0  execution test
FAIL: gcc.dg/torture/stackalign/nested-5.c   -O0 -fpic execution test
FAIL: gcc.dg/torture/stackalign/nested-5.c   -O1  execution test
FAIL: gcc.dg/torture/stackalign/nested-5.c   -O1 -fpic execution test
FAIL: gcc.dg/torture/stackalign/nested-5.c   -O2  execution test
FAIL: gcc.dg/torture/stackalign/nested-5.c   -O2 -flto -fno-use-linker-plugin -flto-partition=none  execution test
FAIL: gcc.dg/torture/stackalign/nested-5.c   -O2 -flto -fno-use-linker-plugin -flto-partition=none -fpic execution test
FAIL: gcc.dg/torture/stackalign/nested-5.c   -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects  execution test
FAIL: gcc.dg/torture/stackalign/nested-5.c   -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects -fpic execution test
FAIL: gcc.dg/torture/stackalign/nested-5.c   -O2 -fpic execution test
FAIL: gcc.dg/torture/stackalign/nested-5.c   -O3 -g  execution test
FAIL: gcc.dg/torture/stackalign/nested-5.c   -O3 -g -fpic execution test
FAIL: gcc.dg/torture/stackalign/nested-5.c   -Os  execution test
FAIL: gcc.dg/torture/stackalign/nested-5.c   -Os -fpic execution test
FAIL: gcc.dg/torture/stackalign/nested-6.c   -O0  execution test
FAIL: gcc.dg/torture/stackalign/nested-6.c   -O0 -fpic execution test
FAIL: gcc.dg/torture/stackalign/nested-6.c   -O1  execution test
FAIL: gcc.dg/torture/stackalign/nested-6.c   -O1 -fpic execution test
FAIL: gcc.dg/torture/stackalign/nested-6.c   -O2  execution test
FAIL: gcc.dg/torture/stackalign/nested-6.c   -O2 -flto -fno-use-linker-plugin -flto-partition=none  execution test
FAIL: gcc.dg/torture/stackalign/nested-6.c   -O2 -flto -fno-use-linker-plugin -flto-partition=none -fpic execution test
FAIL: gcc.dg/torture/stackalign/nested-6.c   -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects  execution test
FAIL: gcc.dg/torture/stackalign/nested-6.c   -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects -fpic execution test
FAIL: gcc.dg/torture/stackalign/nested-6.c   -O2 -fpic execution test
FAIL: gcc.dg/torture/stackalign/nested-6.c   -O3 -g  execution test
FAIL: gcc.dg/torture/stackalign/nested-6.c   -O3 -g -fpic execution test
FAIL: gcc.dg/torture/stackalign/nested-6.c   -Os  execution test
FAIL: gcc.dg/torture/stackalign/nested-6.c   -Os -fpic execution test
FAIL: gcc.dg/tree-ssa/tailcall-7-run.c execution test

               ========= Summary of gcc testsuite =========
                            | # of unexpected case / # of unique unexpected case
                            |          gcc |          g++ |     gfortran |
     rv32gc/ ilp32d/ medlow |   70 /    13 |    0 /     0 |      - |
make: *** [Makefile:1055: report-gcc-newlib] Error 1

[kito-cheng]

I guess those fails will gone after you apply the fix that I mention before to GCC will drop all fails, if so I am OK to put those fails to allowlist for now.

[patrick-rivos]

After cherry-picking that the GCC fix, all those listed failures are resolved. I've added the failures to the allowlist with a link to the fixing commit.

Weirdly enough we get a new failure with the cherry-picked commit, but it's fixed on trunk so I'm not going to worry about it :)

                === gcc: Unexpected fails for rv64gc lp64d medlow ===
FAIL: gcc.target/riscv/pr93304.c   -O2 -flto -fno-use-linker-plugin -flto-partition=none   scan-assembler-not t2
FAIL: gcc.target/riscv/pr93304.c   -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects   scan-assembler-not t2

               ========= Summary of gcc testsuite =========
                            | # of unexpected case / # of unique unexpected case
                            |          gcc |          g++ |     gfortran |
     rv64gc/  lp64d/ medlow |    2 /     1 |    0 /     0 |      - |
make: *** [Makefile:1055: report-gcc-newlib] Error 1

[kito-cheng]

Feel free to merge once you think OK :)