[Frontend][OpenMP] Remove reduction from allowed clauses for target (#90754)

The "reduction" clause is not allowed on the "target" construct.

Author: kparzysz

clang/test/Analysis/cfg-openmp.cpp

@@ -195,21 +195,20 @@ void xxx(int argc) {
 #pragma omp single
   argc = x;
 // CHECK-NEXT:  [[#TARGET:]]:
-// CHECK-SAME:  [B1.[[#TARGET+10]]]
-// CHECK-NEXT:  [[#TARGET+1]]: [B1.[[#TARGET+10]]] (ImplicitCastExpr, LValueToRValue, int)
-// CHECK-NEXT:  [[#TARGET+2]]: [B1.[[#TARGET+9]]]
-// CHECK-NEXT:  [[#TARGET+3]]: [B1.[[#TARGET+9]]] = [B1.[[#TARGET+1]]]
+// CHECK-SAME:  [B1.[[#TARGET+9]]]
+// CHECK-NEXT:  [[#TARGET+1]]: [B1.[[#TARGET+9]]] (ImplicitCastExpr, LValueToRValue, int)
+// CHECK-NEXT:  [[#TARGET+2]]: [B1.[[#TARGET+8]]]
+// CHECK-NEXT:  [[#TARGET+3]]: [B1.[[#TARGET+8]]] = [B1.[[#TARGET+1]]]
 // CHECK-NEXT:  [[#TARGET+4]]: cond
 // CHECK-NEXT:  [[#TARGET+5]]: [B1.[[#TARGET+4]]] (ImplicitCastExpr, LValueToRValue, int)
 // CHECK-NEXT:  [[#TARGET+6]]: [B1.[[#TARGET+5]]] (ImplicitCastExpr, IntegralToBoolean, _Bool)
 // CHECK-NEXT:  [[#TARGET+7]]: fp
-// CHECK-NEXT:  [[#TARGET+8]]: rd
-// CHECK-NEXT:  [[#TARGET+9]]: argc
-// CHECK-NEXT:  [[#TARGET+10]]: x
-// CHECK-NEXT:  [[#TARGET+11]]: #pragma omp target depend(in : argc) if(cond) firstprivate(fp) reduction(-: rd)
+// CHECK-NEXT:  [[#TARGET+8]]: argc
+// CHECK-NEXT:  [[#TARGET+9]]: x
+// CHECK-NEXT:  [[#TARGET+10]]: #pragma omp target depend(in : argc) if(cond) firstprivate(fp)
 // CHECK-NEXT:    [B1.[[#TARGET+3]]];
 #pragma omp target depend(in \
-                          : argc) if(cond) firstprivate(fp) reduction(-:rd)
+                          : argc) if(cond) firstprivate(fp)
   argc = x;
 // CHECK-NEXT:  [[#TP:]]:
 // CHECK-SAME:  [B1.[[#TP+11]]]

clang/test/OpenMP/nvptx_target_cuda_mode_messages.cpp

@@ -46,23 +46,6 @@ int foo(int n, double *ptr) {
   return a;
 }
 
-template <typename tx>
-tx ftemplate(int n) {
-  tx a = 0;
-  tx b[10];
-
-#pragma omp target reduction(+ \
-                             : a, b) // expected-note {{defined as threadprivate or thread local}}
-  {
-    int e;                        // expected-note {{defined as threadprivate or thread local}}
-#pragma omp parallel shared(a, e) // expected-error 2 {{threadprivate or thread local variable cannot be shared}}
-    a += 1;
-    b[2] += 1;
-  }
-
-  return a;
-}
-
 static int fstatic(int n) {
   int a = 0;
   char aaa = 0;
@@ -101,7 +84,6 @@ int bar(int n, double *ptr) {
   S1 S;
   a += S.r1(n);
   a += fstatic(n);
-  a += ftemplate<int>(n); // expected-note {{in instantiation of function template specialization 'ftemplate<int>' requested here}}
 
   return a;
 }