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

["juzhe.zhong at rivai dot ai" <gcc-bugzilla@gcc.gnu.org>]

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

--- Comment #4 from JuzheZhong <juzhe.zhong at rivai dot ai> ---
Update status:

All C++ FAILs are fixed.

There are only 38 FAILs in total:

FAIL: gcc.c-torture/unsorted/dump-noaddr.c.*r.vsetvl,  -O3 -fomit-frame-pointer
-funroll-loops -fpeel-loops -ftracer -finline-functions  compariso   n
FAIL: gcc.c-torture/unsorted/dump-noaddr.c.*r.vsetvl,  -O3 -g  comparison
FAIL: gcc.dg/Wstringop-overflow-70.c  (test for warnings, line 22)
FAIL: gcc.dg/pr104992.c scan-tree-dump-times optimized " % " 9
FAIL: gcc.dg/pr70252.c (internal compiler error: in
gimple_expand_vec_cond_expr, at gimple-isel.cc:284)
FAIL: gcc.dg/pr70252.c (test for excess errors)
FAIL: gcc.dg/pr92301.c execution test
FAIL: gcc.dg/signbit-2.c scan-tree-dump-not optimized "\\s+>>\\s+31"
FAIL: gcc.dg/signbit-5.c execution test
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-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/forwprop-40.c scan-tree-dump-times optimized
"BIT_FIELD_REF" 0
FAIL: gcc.dg/tree-ssa/forwprop-40.c scan-tree-dump-times optimized
"BIT_INSERT_EXPR" 0
FAIL: gcc.dg/tree-ssa/forwprop-41.c scan-tree-dump-times optimized
"BIT_FIELD_REF" 0
FAIL: gcc.dg/tree-ssa/forwprop-41.c scan-tree-dump-times optimized
"BIT_INSERT_EXPR" 1
FAIL: gcc.dg/tree-ssa/gen-vect-11b.c scan-tree-dump-times vect "vectorized 0
loops" 1
FAIL: gcc.dg/tree-ssa/gen-vect-11c.c scan-tree-dump-times vect "vectorized 0
loops" 1
FAIL: gcc.dg/tree-ssa/gen-vect-26.c scan-tree-dump-times vect "Alignment of
access forced using peeling" 1
FAIL: gcc.dg/tree-ssa/gen-vect-28.c scan-tree-dump-times vect "Alignment of
access forced using peeling" 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"
FAIL: gcc.dg/tree-ssa/predcom-2.c scan-tree-dump-times pcom "Unrolling 2
times." 2
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._]+|(?:v   ect_)?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
FAIL: gcc.target/riscv/rvv/base/vector-abi-9.c  (test for warnings, line 9)

Most of them are Dump FAIL which are because of missing VLS modes patterns.

Will address them soon