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compiler: use separate opcodes for string and number equality

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This commit is contained in:
Evgenii 2019-08-16 13:05:07 +03:00
parent 1e09037902
commit d58fbe0c88
1 changed files with 12 additions and 5 deletions
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15
pkg/vm/compiler/codegen.go
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@ -382,15 +382,22 @@ func (c *codegen) Visit(node ast.Node) ast.Visitor {
ast.Walk(c, n.X)
ast.Walk(c, n.Y)
// VM has separate opcode for string concatenation
if n.Op == token.ADD {
typ, ok := tinfo.Type.Underlying().(*types.Basic)
if ok && typ.Kind() == types.String {
switch {
case n.Op == token.ADD:
// VM has separate opcodes for number and string concatenation
if isStringType(tinfo.Type) {
emitOpcode(c.prog, vm.CAT)
} else {
emitOpcode(c.prog, vm.ADD)
}
case n.Op == token.EQL:
// VM has separate opcodes for number and string equality
if isStringType(tinfo.Type) {
emitOpcode(c.prog, vm.EQUAL)
} else {
emitOpcode(c.prog, vm.NUMEQUAL)
}
default:
c.convertToken(n.Op)
}
return nil