inlining: minor optimizations

base/compiler/ssair/inlining.jl

@@ -334,27 +334,24 @@ function ir_inline_item!(compact::IncrementalCompact, idx::Int, argexprs::Vector
     end
     nargs_def = def.nargs::Int32
     isva = nargs_def > 0 && def.isva
-    sig = def.sig
     if isva
-        vararg = mk_tuplecall!(compact, argexprs[nargs_def:end], topline)
-        argexprs = Any[argexprs[1:(nargs_def - 1)]..., vararg]
+        argexprs = fix_va_argexprs!(compact, argexprs, nargs_def, topline)
     end
     if def.is_for_opaque_closure
         # Replace the first argument by a load of the capture environment
         argexprs[1] = insert_node_here!(compact,
             NewInstruction(Expr(:call, GlobalRef(Core, :getfield), argexprs[1], QuoteNode(:captures)),
             spec.ir.argtypes[1], topline))
     end
-    flag = compact.result[idx][:flag]
-    boundscheck_idx = boundscheck
-    if boundscheck_idx === :default || boundscheck_idx === :propagate
-        if (flag & IR_FLAG_INBOUNDS) != 0
-            boundscheck_idx = :off
+    if boundscheck === :default || boundscheck === :propagate
+        if (compact.result[idx][:flag] & IR_FLAG_INBOUNDS) != 0
+            boundscheck = :off
         end
     end
     # If the iterator already moved on to the next basic block,
     # temporarily re-open in again.
     local return_value
+    sig = def.sig
     # Special case inlining that maintains the current basic block if there's only one BB in the target
     if spec.linear_inline_eligible
         #compact[idx] = nothing
@@ -364,7 +361,7 @@ function ir_inline_item!(compact::IncrementalCompact, idx::Int, argexprs::Vector
             # face of rename_arguments! mutating in place - should figure out
             # something better eventually.
             inline_compact[idx′] = nothing
-            stmt′ = ssa_substitute!(idx′, stmt′, argexprs, sig, sparam_vals, linetable_offset, boundscheck_idx, compact)
+            stmt′ = ssa_substitute!(idx′, stmt′, argexprs, sig, sparam_vals, linetable_offset, boundscheck, compact)
             if isa(stmt′, ReturnNode)
                 val = stmt′.val
                 isa(val, SSAValue) && (compact.used_ssas[val.id] += 1)
@@ -390,7 +387,7 @@ function ir_inline_item!(compact::IncrementalCompact, idx::Int, argexprs::Vector
         inline_compact = IncrementalCompact(compact, spec.ir, compact.result_idx)
         for ((_, idx′), stmt′) in inline_compact
             inline_compact[idx′] = nothing
-            stmt′ = ssa_substitute!(idx′, stmt′, argexprs, sig, sparam_vals, linetable_offset, boundscheck_idx, compact)
+            stmt′ = ssa_substitute!(idx′, stmt′, argexprs, sig, sparam_vals, linetable_offset, boundscheck, compact)
             if isa(stmt′, ReturnNode)
                 if isdefined(stmt′, :val)
                     val = stmt′.val
@@ -441,6 +438,24 @@ function ir_inline_item!(compact::IncrementalCompact, idx::Int, argexprs::Vector
     return_value
 end
 
+function fix_va_argexprs!(compact::IncrementalCompact,
+    argexprs::Vector{Any}, nargs_def::Int, line_idx::Int32)
+    newargexprs = Any[]
+    for i in 1:(nargs_def-1)
+        push!(newargexprs, argexprs[i])
+    end
+    tuple_call = Expr(:call, TOP_TUPLE)
+    tuple_typs = Any[]
+    for i in nargs_def:length(argexprs)
+        arg = argexprs[i]
+        push!(tuple_call.args, arg)
+        push!(tuple_typs, argextype(arg, compact))
+    end
+    tuple_typ = tuple_tfunc(tuple_typs)
+    push!(newargexprs, insert_node_here!(compact, NewInstruction(tuple_call, tuple_typ, line_idx)))
+    return newargexprs
+end
+
 const FATAL_TYPE_BOUND_ERROR = ErrorException("fatal error in type inference (type bound)")
 
 function ir_inline_unionsplit!(compact::IncrementalCompact, idx::Int,
@@ -482,11 +497,12 @@ function ir_inline_unionsplit!(compact::IncrementalCompact, idx::Int,
         if !isa(case, ConstantCase)
             argexprs′ = copy(argexprs)
             for i = 1:length(mparams)
+                argex = argexprs[i]
+                (isa(argex, SSAValue) || isa(argex, Argument)) || continue
                 a, m = aparams[i], mparams[i]
-                (isa(argexprs[i], SSAValue) || isa(argexprs[i], Argument)) || continue
                 if !(a <: m)
                     argexprs′[i] = insert_node_here!(compact,
-                        NewInstruction(PiNode(argexprs′[i], m), m, line))
+                        NewInstruction(PiNode(argex, m), m, line))
                 end
             end
         end
@@ -1336,12 +1352,6 @@ function assemble_inline_todo!(ir::IRCode, state::InliningState)
     todo
 end
 
-function mk_tuplecall!(compact::IncrementalCompact, args::Vector{Any}, line_idx::Int32)
-    e = Expr(:call, TOP_TUPLE, args...)
-    etyp = tuple_tfunc(Any[argextype(args[i], compact) for i in 1:length(args)])
-    return insert_node_here!(compact, NewInstruction(e, etyp, line_idx))
-end
-
 function linear_inline_eligible(ir::IRCode)
     length(ir.cfg.blocks) == 1 || return false
     terminator = ir[SSAValue(last(ir.cfg.blocks[1].stmts))]