When zbs is not available, there's nothing special with single-bit
immediates and we should perform reassociation as normal immediates.

gcc/ChangeLog:

	PR target/115921
	* config/riscv/riscv.md (<optab>_shift_reverse): Only check
	popcount_hwi if !TARGET_ZBS.

When the vsetvl instructions of the two RVV instructions are merged
using "use_max_sew", it is possible to update the sew of prev if
prev.sew < next.sew, but keep the original ratio, which is obviously
wrong. when the subsequent instructions are equal to the wrong ratio,
it is possible to generate the wrong "vsetvli zero,zero" instruction,
which will lead to unknown avl.

gcc/ChangeLog:

	* config/riscv/riscv-vsetvl.cc (demand_system::use_max_sew): Also
	set the ratio for PREV.

gcc/testsuite/ChangeLog:

	* gcc.target/riscv/rvv/base/bug-10.c: New test.

This seeming benign mistake caused a massive SPEC2017 Cactu regression
(2.1 trillion insn to 2.5 trillion) wiping out all the gains from my
recent sched1 improvement. Thankfully the issue was trivial to fix even
if hard to isolate.

On BPI3:

Before bug
----------
|  Performance counter stats for './cactusBSSN_r_base-1':
|
|       4,557,471.02 msec task-clock:u                     #    1.000 CPUs utilized
|              1,245      context-switches:u               #    0.273 /sec
|                  1      cpu-migrations:u                 #    0.000 /sec
|            205,376      page-faults:u                    #   45.064 /sec
|  7,291,944,801,307      cycles:u                         #    1.600 GHz
|  2,134,835,735,951      instructions:u                   #    0.29  insn per cycle
|     10,799,296,738      branches:u                       #    2.370 M/sec
|         15,308,966      branch-misses:u                  #    0.14% of all branches
|
|     4557.710508078 seconds time elapsed

Bug
---
|  Performance counter stats for './cactusBSSN_r_base-2':
|
|       4,801,813.79 msec task-clock:u                     #    1.000 CPUs utilized
|              8,066      context-switches:u               #    1.680 /sec
|                  1      cpu-migrations:u                 #    0.000 /sec
|            203,836      page-faults:u                    #   42.450 /sec
|  7,682,826,638,790      cycles:u                         #    1.600 GHz
|  2,503,133,291,344      instructions:u                   #    0.33  insn per cycle
   ^^^^^^^^^^^^^^^^^
|     10,799,287,796      branches:u                       #    2.249 M/sec
|         16,641,200      branch-misses:u                  #    0.15% of all branches
|
|     4802.616638386 seconds time elapsed
|

Fix
---
|  Performance counter stats for './cactusBSSN_r_base-3':
|
|       4,556,170.75 msec task-clock:u                     #    1.000 CPUs utilized
|              1,739      context-switches:u               #    0.382 /sec
|                  0      cpu-migrations:u                 #    0.000 /sec
|            203,458      page-faults:u                    #   44.655 /sec
|  7,289,854,613,923      cycles:u                         #    1.600 GHz
|  2,134,854,070,916      instructions:u                   #    0.29  insn per cycle
|     10,799,296,807      branches:u                       #    2.370 M/sec
|         15,403,357      branch-misses:u                  #    0.14% of all branches
|
|     4556.445490123 seconds time elapsed

Fixes: 46888571 ("RISC-V: Add cr and cf constraint")
Signed-off-by: Vineet Gupta <vineetg@rivosinc.com>

gcc/ChangeLog:
	* config/riscv/riscv.cc (riscv_register_move_cost): Remove buggy
	check.

Add support to the Fortran parser for the OpenMP syntax that allows a comma
after the directive name and between clauses of declare variant. The C and C++
parsers already support this syntax so only a new test is added.

gcc/fortran/ChangeLog:

	* openmp.cc (gfc_match_omp_declare_variant): Match comma after directive
	name and between clauses. Emit more useful diagnostics.

gcc/testsuite/ChangeLog:

	* gfortran.dg/gomp/declare-variant-2.f90: Remove error test for a comma
	after the directive name. Add tests for other invalid syntaxes (extra
	comma and invalid clause).
	* c-c++-common/gomp/adjust-args-5.c: New test.
	* gfortran.dg/gomp/adjust-args-11.f90: New test.