Merge commit '449f84fea652' from llvm.org/main into next

Author: git apple-llvm automerger

flang/lib/Optimizer/CodeGen/Target.cpp

@@ -930,6 +930,13 @@ struct TargetAArch64 : public GenericTarget<TargetAArch64> {
         .Case<fir::VectorType>([&](auto) {
           TODO(loc, "passing vector argument to C by value is not supported");
           return NRegs{};
+        })
+        .Default([&](auto ty) {
+          if (fir::conformsWithPassByRef(ty))
+            return NRegs{1, false}; // Pointers take 1 integer register
+          TODO(loc, "unsupported component type for BIND(C), VALUE derived "
+                    "type argument");
+          return NRegs{};
         });
   }
 

flang/test/Fir/struct-passing-aarch64-byval.fir

@@ -71,3 +71,17 @@ func.func private @too_many_hfa(!fir.type<hfa_max{i:f128,j:f128,k:f128,l:f128}>,
 
 // CHECK-LABEL: func.func private @too_big(!fir.ref<!fir.type<too_big{i:!fir.array<5xi32>}>> {{{.*}}, llvm.byval = !fir.type<too_big{i:!fir.array<5xi32>}>})
 func.func private @too_big(!fir.type<too_big{i:!fir.array<5xi32>}>)
+
+// CHECK-LABEL: func.func private @pointer_type(!fir.ref<i64>, !fir.array<1xi64>)
+func.func private @pointer_type(!fir.ref<i64>, !fir.type<pointer_type{i:i64}>)
+
+// CHECK-LABEL: func.func private @pointer_type_too_many_int(!fir.ref<i64>, 
+// CHECK-SAME: !fir.array<2xi64>,
+// CHECK-SAME: !fir.array<2xi64>,
+// CHECK-SAME: !fir.array<2xi64>,
+// CHECK-SAME: !fir.ref<!fir.type<int_max{i:i64,j:i64}>> {{{.*}}, llvm.byval = !fir.type<int_max{i:i64,j:i64}>})
+func.func private @pointer_type_too_many_int(!fir.ref<i64>,
+                       !fir.type<int_max{i:i64,j:i64}>,
+                       !fir.type<int_max{i:i64,j:i64}>,
+                       !fir.type<int_max{i:i64,j:i64}>,
+                       !fir.type<int_max{i:i64,j:i64}>)