Fixed bug in determining tiling cost.

Author: chriselrod

src/determinestrategy.jl

@@ -239,7 +239,7 @@ function evaluate_cost_tile(
         # Add to set of defined symbles
         push!(nested_loop_syms, itersym)
         if n == 1
-            iter = length(ls, itersym) * length(ls, order[2]) / N
+            iter = length(ls, itersym) * length(ls, order[2]) / W
         elseif n > 2
             iter *= Float64(length(ls, itersym))
         end
@@ -279,6 +279,7 @@ function evaluate_cost_tile(
     end
     Tstatic = isstaticloop(ls, tiled)
     Ustatic = isstaticloop(ls, unrolled)
+    # @show order, cost_vec, reg_pressure
     if Tstatic
         if Ustatic
             solve_tilesize(cost_vec, reg_pressure, looprangehint(ls, tiled), looprangehint(ls, unrolled))

test/runtests.jl

@@ -54,9 +54,13 @@ else
     (5,5)
 end
 @test LoopVectorization.choose_order(lsgemm) == (Symbol[:j,:i,:k], U, T)
+LoopVectorization.choose_order(lsgemm)
 LoopVectorization.lower(lsgemm)
 lsgemm.operations
 
+LoopVectorization.choose_tile(lsgemm)
+LoopVectorization.choose_unroll_order(lsgemm)
+
 ops = LoopVectorization.oporder(lsgemm);
 findall(length.(ops) .!= 0)