update for 1.8 (#516)

- it seems like `:ccall` preserves may now include `SlotNumber` objects,
  and so we need to update `build_compiled_call!` accordingly
- JuliaLang/julia#43671 increased the number of
  statements of code that involves assignment to a global variable

src/optimize.jl

@@ -268,9 +268,8 @@ function build_compiled_call!(stmt::Expr, fcall, code, idx, nargs::Int, sparams:
     delete_idx = Int[]
     if fcall === :ccall
         cfunc, RetType, ArgType = lookup_stmt(code.code, stmt.args[1]), stmt.args[2], stmt.args[3]::SimpleVector
-        # The result of this is useful to have next to you when reading this code:
-        # f(x, y) =  ccall(:jl_value_ptr, Ptr{Cvoid}, (Float32,Any), x, y)
-        # @code_lowered f(2, 3)
+        # delete cconvert and unsafe_convert calls and forward the original values, since
+        # the same conversions will be applied within the generated compiled variant of this :foreigncall anyway
         args = []
         for (atype, arg) in zip(ArgType, stmt.args[6:6+nargs-1])
             if atype === Any
@@ -279,19 +278,23 @@ function build_compiled_call!(stmt::Expr, fcall, code, idx, nargs::Int, sparams:
                 if arg isa SSAValue
                     unsafe_convert_expr = code.code[arg.id]::Expr
                     push!(delete_idx, arg.id) # delete the unsafe_convert
-                    cconvert_stmt = unsafe_convert_expr.args[3]::SSAValue
-                    push!(delete_idx, cconvert_stmt.id) # delete the cconvert
-                    cconvert_expr = code.code[cconvert_stmt.id]::Expr
-                    push!(args, cconvert_expr.args[3])
+                    cconvert_val = unsafe_convert_expr.args[3]
+                    if isa(cconvert_val, SSAValue)
+                        push!(delete_idx, cconvert_val.id) # delete the cconvert
+                        newarg = (code.code[cconvert_val.id]::Expr).args[3]
+                        push!(args, newarg)
+                    else
+                        @assert isa(cconvert_val, SlotNumber)
+                        push!(args, cconvert_val)
+                    end
                 elseif arg isa SlotNumber
-                    index = findfirst(code.code) do expr
+                    idx = findfirst(code.code) do expr
                         Meta.isexpr(expr, :(=)) || return false
                         lhs = expr.args[1]
                         return lhs isa SlotNumber && lhs.id === arg.id
-                    end
-                    index = index::Int
-                    unsafe_convert_expr = code.code[index]::Expr
-                    push!(delete_idx, index) # delete the unsafe_convert
+                    end::Int
+                    unsafe_convert_expr = code.code[idx]::Expr
+                    push!(delete_idx, idx) # delete the unsafe_convert
                     push!(args, unsafe_convert_expr.args[2])
                 else
                     error("unexpected foreigncall argument type encountered: $(typeof(arg))")

test/interpret.jl

@@ -585,8 +585,11 @@ function call_cf()
     ccall(cf[1], Int, (Int, Int), 1, 2)
 end
 @test (@interpret call_cf()) == call_cf()
-frame = JuliaInterpreter.enter_call(call_cf)
-@test frame.framecode.methodtables[2] == Compiled()
+let mt = JuliaInterpreter.enter_call(call_cf).framecode.methodtables
+    @test any(1:length(mt)) do i
+        isassigned(mt, i) && mt[i] === Compiled()
+    end
+end
 
 # ccall with integer static parameter
 f_N() =  Array{Float64, 4}(undef, 1, 3, 2, 1)
@@ -597,8 +600,11 @@ f() = ccall((:clock, "libc"), Int32, ())
 try @interpret f()
 catch
 end
-frame = JuliaInterpreter.enter_call(f)
-@test frame.framecode.methodtables[1] == Compiled()
+let mt = JuliaInterpreter.enter_call(f).framecode.methodtables
+    @test any(1:length(mt)) do i
+        isassigned(mt, i) && mt[i] === Compiled()
+    end
+end
 
 # https://github.com/JuliaDebug/JuliaInterpreter.jl/issues/194
 f() =  Meta.lower(Main, Meta.parse("(a=1,0)"))
@@ -848,7 +854,7 @@ end
         src = lwr.args[1]::Core.CodeInfo
         frame = Frame(M, src; optimize=false)
         @test length(frame.framecode.src.code) == length(src.code)
-        @test JuliaInterpreter.finish_and_return!(frame, true) 
+        @test JuliaInterpreter.finish_and_return!(frame, true)
 
         M = Module()
         lwr = Meta.@lower M begin
@@ -868,7 +874,7 @@ end
         src = lwr.args[1]::Core.CodeInfo
         frame = Frame(M, src; optimize=false)
         @test length(frame.framecode.src.code) == length(src.code)
-        @test JuliaInterpreter.finish_and_return!(frame, true) 
+        @test JuliaInterpreter.finish_and_return!(frame, true)
     end
 
     iscallexpr(ex::Expr) = ex.head === :call

test/limits.jl

@@ -85,7 +85,11 @@ module EvalLimited end
         insert!(ex.args, 1, LineNumberNode(1, Symbol("fake.jl")))
     end
     modexs = collect(ExprSplitter(EvalLimited, ex))
-    nstmts = 100 # enough to ensure it gets into the loop but doesn't finish
+    @static if isdefined(Core, :get_binding_type)
+        nstmts = 10*12 + 20 # 10 * 12 statements per iteration + α
+    else
+        nstmts = 9*12 + 20 # 10 * 9 statements per iteration + α
+    end
     for (mod, ex) in modexs
         frame = Frame(mod, ex)
         @test isa(frame, Frame)
@@ -96,7 +100,7 @@ module EvalLimited end
             isa(ret, Aborted) && (push!(aborts, ret); break)
         end
     end
-    @test 8 < EvalLimited.s < 50  # with Compiled(), 9 statements per iteration
+    @test 10 ≤ EvalLimited.s < 50
     @test length(aborts) == 1
     @test aborts[1].at.line ∈ (2, 3, 4, 5)  # 2 corresponds to lowering of the for loop