[Bug target/111311] RISC-V regression testsuite errors with --param=riscv-autovec-preference=scalable

["patrick at rivosinc dot com" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111311

--- Comment #18 from Patrick O'Neill <patrick at rivosinc dot com> ---
2023-11-04 -> 2023-11-15 rv64gcv glibc on qemu status update:
gcc:
83 -> 46
g++:
13 -> 13
gfortran:
30 -> 14

All of these have been resolved failures, no new regressions replaced
resolved ones on rv64gcv during this time period.

Data from: https://github.com/patrick-rivos/gcc-postcommit-ci/issues/177

                === gcc: Unexpected fails for rv64gcv lp64d medlow ===
FAIL: c-c++-common/spec-barrier-1.c  -Wc++-compat  (test for excess errors)
FAIL: c-c++-common/vector-subscript-4.c  -Wc++-compat   scan-tree-dump-not
optimized "vector"
XPASS: gcc.dg/attr-alloc_size-11.c missing range info for short (test for
warnings, line 51)
XPASS: gcc.dg/attr-alloc_size-11.c missing range info for signed char (test for
warnings, line 50)
FAIL: gcc.dg/signbit-2.c scan-tree-dump optimized "\\s+>\\s+{ 0(, 0)+ }"
FAIL: gcc.dg/signbit-2.c scan-tree-dump-not optimized "\\s+>>\\s+31"
FAIL: gcc.dg/signbit-5.c execution test
XPASS: gcc.dg/uninit-pred-9_b.c bogus warning (test for bogus messages, line
20)
FAIL: gcc.dg/unroll-8.c scan-rtl-dump loop2_unroll "Not unrolling loop, doesn't
roll"
FAIL: gcc.dg/unroll-8.c scan-rtl-dump loop2_unroll "likely upper bound: 6"
FAIL: gcc.dg/unroll-8.c scan-rtl-dump loop2_unroll "realistic bound: -1"
FAIL: gcc.dg/var-expand1.c scan-rtl-dump loop2_unroll "Expanding Accumulator"
FAIL: gcc.dg/tree-prof/val-prof-1.c scan-tree-dump optimized "if \\(n_[0-9]* !=
257\\)"
FAIL: gcc.dg/tree-prof/val-prof-3.c scan-tree-dump optimized "if \\(_[0-9]* \\<
n_[0-9]*"
FAIL: gcc.dg/tree-prof/val-prof-4.c scan-tree-dump optimized "if \\(n_[0-9]*
\\>"
FAIL: gcc.dg/tree-ssa/copy-headers-8.c scan-tree-dump-times ch2 "Conditional
combines static and invariant" 1
FAIL: gcc.dg/tree-ssa/copy-headers-8.c scan-tree-dump-times ch2 "Will duplicate
bb" 2
FAIL: gcc.dg/tree-ssa/cunroll-16.c scan-tree-dump cunroll "optimized: loop with
[0-9]+ iterations completely unrolled"
FAIL: gcc.dg/tree-ssa/cunroll-16.c scan-tree-dump-not optimized "foo"
FAIL: gcc.dg/tree-ssa/gen-vect-34.c scan-tree-dump-times vect "vectorized 1
loops" 1
FAIL: gcc.dg/tree-ssa/loop-bound-1.c scan-tree-dump ivopts "bounded by 254"
FAIL: gcc.dg/tree-ssa/loop-bound-2.c scan-tree-dump ivopts "bounded by 254"
XPASS: gcc.dg/tree-ssa/pr84512.c scan-tree-dump optimized "return 285;"
FAIL: gcc.dg/tree-ssa/predcom-4.c scan-tree-dump-times pcom "Combination" 1
FAIL: gcc.dg/tree-ssa/predcom-4.c scan-tree-dump-times pcom "Unrolling 3
times." 1
FAIL: gcc.dg/tree-ssa/predcom-5.c scan-tree-dump-times pcom "Combination" 2
FAIL: gcc.dg/tree-ssa/predcom-5.c scan-tree-dump-times pcom "Unrolling 3
times." 1
FAIL: gcc.dg/tree-ssa/predcom-9.c scan-tree-dump pcom "Executing predictive
commoning without unrolling"
FAIL: gcc.dg/tree-ssa/reassoc-46.c scan-tree-dump-times optimized
"(?:vect_)?sum_[\\d._]+ = (?:(?:vect_)?_[\\d._]+ \\+
(?:vect_)?sum_[\\d._]+|(?:vect_)?sum_[\\d._]+ \\+ (?:vect_)?_[\\d._]+)" 1
FAIL: gcc.dg/tree-ssa/scev-10.c scan-tree-dump-times ivopts " 
Type:\\tREFERENCE ADDRESS\n" 1
FAIL: gcc.dg/tree-ssa/scev-11.c scan-tree-dump-times ivopts " 
Type:\\tREFERENCE ADDRESS\n" 2
FAIL: gcc.dg/tree-ssa/scev-14.c scan-tree-dump ivopts "Overflowness wrto loop
niter:\tNo-overflow"
FAIL: gcc.dg/tree-ssa/scev-9.c scan-tree-dump-times ivopts "  Type:\\tREFERENCE
ADDRESS\n" 1
FAIL: gcc.dg/tree-ssa/split-path-11.c scan-tree-dump-times split-paths "join
point for if-convertable half-diamond" 1
XPASS: gcc.dg/tree-ssa/ssa-fre-3.c scan-tree-dump fre1 "Replaced \\(int\\)
aa_.*with a_"
FAIL: gcc.dg/tree-ssa/update-threading.c scan-tree-dump-times optimized
"Invalid sum" 0
FAIL: gcc.dg/vect/pr103116-1.c -flto -ffat-lto-objects  scan-tree-dump vect
"Data access with gaps requires scalar epilogue loop"
FAIL: gcc.dg/vect/pr103116-1.c scan-tree-dump vect "Data access with gaps
requires scalar epilogue loop"
FAIL: gcc.dg/vect/pr103116-2.c -flto -ffat-lto-objects  scan-tree-dump vect
"peeling for gaps insufficient for access"
FAIL: gcc.dg/vect/pr103116-2.c scan-tree-dump vect "peeling for gaps
insufficient for access"
FAIL: gcc.target/riscv/rvv/autovec/gather-scatter/gather_load_run-12.c
execution test
FAIL: gcc.target/riscv/rvv/autovec/gather-scatter/gather_load_run-12.c
execution test
FAIL: gcc.target/riscv/rvv/autovec/gather-scatter/gather_load_run-12.c
execution test
FAIL: gcc.target/riscv/rvv/autovec/gather-scatter/gather_load_run-12.c
execution test
FAIL: gcc.target/riscv/rvv/autovec/gather-scatter/gather_load_run-12.c
execution test
FAIL: gcc.target/riscv/rvv/autovec/gather-scatter/gather_load_run-12.c
execution test
                === g++: Unexpected fails for rv64gcv lp64d medlow ===
FAIL: c-c++-common/spec-barrier-1.c  -std=gnu++14 (test for excess errors)
FAIL: c-c++-common/spec-barrier-1.c  -std=gnu++17 (test for excess errors)
FAIL: c-c++-common/spec-barrier-1.c  -std=gnu++20 (test for excess errors)
FAIL: c-c++-common/spec-barrier-1.c  -std=gnu++98 (test for excess errors)
FAIL: c-c++-common/vector-subscript-4.c  -std=gnu++14  scan-tree-dump-not
optimized "vector"
FAIL: c-c++-common/vector-subscript-4.c  -std=gnu++17  scan-tree-dump-not
optimized "vector"
FAIL: c-c++-common/vector-subscript-4.c  -std=gnu++20  scan-tree-dump-not
optimized "vector"
FAIL: c-c++-common/vector-subscript-4.c  -std=gnu++98  scan-tree-dump-not
optimized "vector"
FAIL: g++.dg/contracts/contracts-tmpl-spec2.C   output pattern test
XPASS: g++.dg/tree-ssa/pr83518.C  -std=gnu++14  scan-tree-dump optimized
"return 15;"
XPASS: g++.dg/tree-ssa/pr83518.C  -std=gnu++17  scan-tree-dump optimized
"return 15;"
XPASS: g++.dg/tree-ssa/pr83518.C  -std=gnu++20  scan-tree-dump optimized
"return 15;"
XPASS: g++.dg/tree-ssa/pr83518.C  -std=gnu++98  scan-tree-dump optimized
"return 15;"
                === gfortran: Unexpected fails for rv64gcv lp64d medlow ===
FAIL: gfortran.dg/ieee/ieee_6.f90   -O0  execution test
FAIL: gfortran.dg/ieee/ieee_6.f90   -O1  execution test
FAIL: gfortran.dg/ieee/ieee_6.f90   -O2  execution test
FAIL: gfortran.dg/ieee/ieee_6.f90   -O3 -fomit-frame-pointer -funroll-loops
-fpeel-loops -ftracer -finline-functions  execution test
FAIL: gfortran.dg/ieee/ieee_6.f90   -O3 -g  execution test
FAIL: gfortran.dg/ieee/ieee_6.f90   -Os  execution test
FAIL: gfortran.dg/ieee/modes_1.f90   -O0  execution test
FAIL: gfortran.dg/ieee/modes_1.f90   -O1  execution test
FAIL: gfortran.dg/ieee/modes_1.f90   -O2  execution test
FAIL: gfortran.dg/ieee/modes_1.f90   -O3 -fomit-frame-pointer -funroll-loops
-fpeel-loops -ftracer -finline-functions  execution test
FAIL: gfortran.dg/ieee/modes_1.f90   -O3 -g  execution test
FAIL: gfortran.dg/ieee/modes_1.f90   -Os  execution test
FAIL: gfortran.dg/vect/pr83232.f90   -O   scan-tree-dump-times slp1
"vectorizing stmts using SLP" 3
FAIL: gfortran.dg/vect/vect-8.f90   -O   scan-tree-dump-times vect "vectorized
2[234] loops" 1