[ICE/unrelated compiler error] Incorrect stream direction causes errors

[IgWod]

When, mistakenly, the write (<<) operator is used with the input clause it cause an unrelated compiler error or ICE.

Example program:

#pragma omp task input(scenter_ref[id] << center_out[block_size])
{
  // ...
}

Possible compiler errors:

during GIMPLE pass: omplower                                                        
stream_simple.c:70:9: internal compiler error: in fold_convert_loc, at fold-const.c:2430                                                      
   70 | #pragma omp task input(scenter_ref[id] << center_out[block_size])                                                                    
      |         ^~~                                                                                                                                                                                              
0x7e8ef7 fold_convert_loc(unsigned int, tree_node*, tree_node*)                
        ../../gcc/fold-const.c:2429                                               
0x984e70 lower_send_clauses                                                                                         
        ../../gcc/omp-low.c:6978                               
0x984e70 lower_omp_taskreg                          
        ../../gcc/omp-low.c:10092                                  
0x976306 lower_omp_1                                                                                                
        ../../gcc/omp-low.c:11511                                                                                                                                                                                                             
0x976306 lower_omp                                                                                                                                                                                                                            
        ../../gcc/omp-low.c:11601                                                                                                                                                                                                             
0x975f1d lower_omp_1                                                                                                                                                                                                                          
        ../../gcc/omp-low.c:11445                                     
0x975f1d lower_omp                      
        ../../gcc/omp-low.c:11601                                                             
0x9766b0 lower_omp_1                                                                                                                        
        ../../gcc/omp-low.c:11437                                           
0x9766b0 lower_omp                                                              
        ../../gcc/omp-low.c:11601                                                                                                             
0x975f1d lower_omp_1                                                                                                                         
        ../../gcc/omp-low.c:11445                                                 
0x975f1d lower_omp                                                 
        ../../gcc/omp-low.c:11601                                                                                                             
0x975f1d lower_omp_1                                                                                                                                                                                                                          
        ../../gcc/omp-low.c:11445                                                                                                                                                                                                             
0x975f1d lower_omp                                                                                                                                                                                                                            
        ../../gcc/omp-low.c:11601                                                                                                                                                                                                             
0x9766b0 lower_omp_1                                                                                                                                                                                                                          
        ../../gcc/omp-low.c:11437                                                                                                                                                                                                             
0x9766b0 lower_omp                                                                                                                                                                                                                            
        ../../gcc/omp-low.c:11601                                                   
0x975f1d lower_omp_1                                      
        ../../gcc/omp-low.c:11445                                                             
0x975f1d lower_omp                                                                  
        ../../gcc/omp-low.c:11601                 
0x9766b0 lower_omp_1                                                              
        ../../gcc/omp-low.c:11437                                       
0x9766b0 lower_omp                                                                                                                          
        ../../gcc/omp-low.c:11601                                                 
0x9766b0 lower_omp_1                                                                          
        ../../gcc/omp-low.c:11437

or

stream_simple.c:75:9: error: Sharing clauses that require building a marshalling function are not allowed at this time. (passing ‘right_in’ to task not allowed, try using a pointer to shared data if possible).
   75 | #pragma omp task input(sleft_ref[id] >> left_in[1],                   \
      |         ^~~
Makefile:7: recipe for target 'stream_simple' failed

The latter happens when there is more than one stream in the clause.

The code is clearly incorrect, but this should result in a related compiler error (and not ICE).