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compiler: do not introduce excessive locals on inline

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When function call-site parameter is an identifier,
we may load it directly. Currently it can be also modified,
this will be fixed in a separate commit.
This commit is contained in:
Evgeniy Stratonikov 2021-02-04 16:26:33 +03:00
parent 1ae0d022dd
commit 27e60455c7
3 changed files with 32 additions and 12 deletions
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25
pkg/compiler/vars.go
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@ -4,7 +4,12 @@ type varScope struct {
localsCnt int
argCnt int
arguments map[string]int
locals []map[string]int
locals []map[string]varInfo
}
type varInfo struct {
refType varType
index int
}
func newVarScope() varScope {
@ -14,17 +19,24 @@ func newVarScope() varScope {
}
func (c *varScope) newScope() {
c.locals = append(c.locals, map[string]int{})
c.locals = append(c.locals, map[string]varInfo{})
}
func (c *varScope) dropScope() {
c.locals = c.locals[:len(c.locals)-1]
}
func (c *varScope) addAlias(name string, vt varType, index int) {
c.locals[len(c.locals)-1][name] = varInfo{
refType: vt,
index: index,
}
}
func (c *varScope) getVarIndex(name string) (varType, int) {
for i := len(c.locals) - 1; i >= 0; i-- {
if i, ok := c.locals[i][name]; ok {
return varLocal, i
if vi, ok := c.locals[i][name]; ok {
return vi.refType, vi.index
}
}
if i, ok := c.arguments[name]; ok {
@ -56,7 +68,10 @@ func (c *varScope) newVariable(t varType, name string) int {
func (c *varScope) newLocal(name string) int {
idx := len(c.locals) - 1
m := c.locals[idx]
m[name] = c.localsCnt
m[name] = varInfo{
refType: varLocal,
index: c.localsCnt,
}
c.localsCnt++
c.locals[idx] = m
return c.localsCnt - 1