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compiler: do not allocate slotes for unused "_" vars

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This commit is contained in:
Evgenii Stratonikov 2020-09-06 15:26:03 +03:00
parent 0b44a43043
commit 18369c489e
3 changed files with 29 additions and 7 deletions
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16
pkg/compiler/global_test.go
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@ -255,3 +255,19 @@ func TestConstDontUseSlots(t *testing.T) {
src := buf.String()
eval(t, src, big.NewInt(count))
}
func TestUnderscoreVarsDontUseSlots(t *testing.T) {
const count = 128
buf := bytes.NewBufferString("package foo\n")
for i := 0; i < count; i++ {
buf.WriteString(fmt.Sprintf("var _, n%d = 1, 1\n", i))
}
buf.WriteString("func Main() int { sum := 0\n")
for i := 0; i < count; i++ {
buf.WriteString(fmt.Sprintf("sum += n%d\n", i))
}
buf.WriteString("return sum }")
src := buf.String()
eval(t, src, big.NewInt(count))
}