lowering: fix has_fcall computation (#57395)

Previously didn't handle ccall or cfunction that were assigned to a
variable. Required for inlining correctness.

Fixes #57023

Author: vtjnash

src/method.c

@@ -485,8 +485,12 @@ jl_code_info_t *jl_new_code_info_from_ir(jl_expr_t *ir)
             is_flag_stmt = 1;
         else if (jl_is_expr(st) && ((jl_expr_t*)st)->head == jl_return_sym)
             jl_array_ptr_set(body, j, jl_new_struct(jl_returnnode_type, jl_exprarg(st, 0)));
-        else if (jl_is_expr(st) && (((jl_expr_t*)st)->head == jl_foreigncall_sym || ((jl_expr_t*)st)->head == jl_cfunction_sym))
-            li->has_fcall = 1;
+        else {
+            if (jl_is_expr(st) && ((jl_expr_t*)st)->head == jl_assign_sym)
+                st = jl_exprarg(st, 1);
+            if (jl_is_expr(st) && (((jl_expr_t*)st)->head == jl_foreigncall_sym || ((jl_expr_t*)st)->head == jl_cfunction_sym))
+                li->has_fcall = 1;
+        }
         if (is_flag_stmt)
             jl_array_uint32_set(li->ssaflags, j, 0);
         else {

test/core.jl

@@ -8443,3 +8443,8 @@ f_call_me() = invoke(f_invoke_me, f_invoke_me_ci)
 f_invalidate_me() = 2
 @test_throws ErrorException invoke(f_invoke_me, f_invoke_me_ci)
 @test_throws ErrorException f_call_me()
+
+myfun57023a(::Type{T}) where {T} = (x = @ccall mycfun()::Ptr{T}; x)
+@test only(code_lowered(myfun57023a)).has_fcall
+myfun57023b(::Type{T}) where {T} = (x = @cfunction myfun57023a Ptr{T} (Ref{T},); x)
+@test only(code_lowered(myfun57023b)).has_fcall