stats break down for fusable branch types

yjit.rb

@@ -365,6 +365,10 @@ def _print_stats(out: $stderr) # :nodoc:
       out.puts "branch_insn_count:     " + format_number(13, stats[:branch_insn_count])
       out.puts "branch_known_count:    " + format_number_pct(13, stats[:branch_known_count], stats[:branch_insn_count])
       out.puts "branch_fused_count:    " + format_number_pct(13, stats[:branch_fused_count], stats[:branch_insn_count])
+      out.puts "branch_fuse_lt:    "     + format_number_pct(13, stats[:branch_fuse_lt], stats[:branch_insn_count])
+      out.puts "branch_fuse_le:    "     + format_number_pct(13, stats[:branch_fuse_le], stats[:branch_insn_count])
+      out.puts "branch_fuse_gt:    "     + format_number_pct(13, stats[:branch_fuse_gt], stats[:branch_insn_count])
+      out.puts "branch_fuse_ge:    "     + format_number_pct(13, stats[:branch_fuse_ge], stats[:branch_insn_count])
 
       out.puts "freed_iseq_count:      " + format_number(13, stats[:freed_iseq_count])
       out.puts "invalidation_count:    " + format_number(13, stats[:invalidation_count])

yjit/src/codegen.rs

@@ -3361,6 +3361,18 @@ fn gen_fixnum_cmp(
             return None;
         }
 
+        if jit.next_insn_opcode() == YARVINSN_branchunless {
+            if bop == BOP_LT {
+                incr_counter!(branch_fuse_lt);
+            } else if bop == BOP_GT {
+                incr_counter!(branch_fuse_gt);
+            } else if bop == BOP_LE {
+                incr_counter!(branch_fuse_le);
+            } else if bop == BOP_GE {
+                incr_counter!(branch_fuse_ge);
+            }
+        }
+
         // Check that both operands are fixnums
         guard_two_fixnums(jit, asm, ocb);
 

yjit/src/stats.rs

@@ -556,6 +556,10 @@ make_counters! {
     branch_insn_count,
     branch_known_count,
     branch_fused_count,
+    branch_fuse_lt,
+    branch_fuse_le,
+    branch_fuse_gt,
+    branch_fuse_ge,
     max_inline_versions,
 
     freed_iseq_count,