block操作优化

internal/backends/compiler_wat/base.wat.go

@@ -89,16 +89,19 @@ const modBaseWat_wa = `
   local.get $ptr
 
   local.get $ptr
-  i32.const 1
-  i32.store offset=0 align=1
+  if
+    local.get $ptr
+    i32.const 1
+    i32.store offset=0 align=1
 
-  local.get $ptr
-  local.get $item_count
-  i32.store offset=4 align=1
+    local.get $ptr
+    local.get $item_count
+    i32.store offset=4 align=1
 
-  local.get $ptr
-  local.get $release_func
-  i32.store offset=8 align=1
+    local.get $ptr
+    local.get $release_func
+    i32.store offset=8 align=1
+  end
 )
 
 (func $$wa.RT.DupWatStack (param $p i32) (result i32) (result i32) ;;result0 = result1 = p
@@ -110,11 +113,14 @@ const modBaseWat_wa = `
   local.get $ptr
 
   local.get $ptr
-  local.get $ptr
-  i32.load offset=0 align=1
-  i32.const 1
-  i32.add
-  i32.store offset=0 align=1
+  if
+    local.get $ptr
+    local.get $ptr
+    i32.load offset=0 align=1
+    i32.const 1
+    i32.add
+    i32.store offset=0 align=1
+  end
 )
 
 (func $$wa.RT.Block.Release (param $ptr i32)

internal/backends/compiler_wat/wir/var_block.go

@@ -56,16 +56,13 @@ func (v *varBlock) emitLoadFromAddr(addr Value, offset int) (insts []wat.Inst) {
 }
 
 func (v *varBlock) emitStoreToAddr(addr Value, offset int) (insts []wat.Inst) {
-	insts = append(insts, v.push(v.name))
-	insts = append(insts, wat.NewInstCall("$wa.RT.Block.Retain"))
-	insts = append(insts, wat.NewInstDrop())
+	insts = append(insts, addr.EmitPush()...)
+	insts = append(insts, v.EmitPush()...)
 
 	insts = append(insts, addr.EmitPush()...)
 	insts = append(insts, wat.NewInstLoad(wat.I32{}, offset, 1))
 	insts = append(insts, wat.NewInstCall("$wa.RT.Block.Release"))
 
-	insts = append(insts, addr.EmitPush()...)
-	insts = append(insts, v.push(v.name))
 	insts = append(insts, wat.NewInstStore(toWatType(v.Type()), offset, 1))
 	return
 }