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compiler: use parameter directly in writeJumps

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`Next` doesn't longer copy parameter.

Signed-off-by: Evgeniy Stratonikov <evgeniy@nspcc.ru>
This commit is contained in:
Evgeniy Stratonikov 2021-08-13 11:58:21 +03:00
parent f5d1277bfd
commit dc9287bf5c
1 changed files with 4 additions and 10 deletions
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14
pkg/compiler/codegen.go
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@ -2097,20 +2097,17 @@ func (c *codegen) resolveFuncDecls(f *ast.File, pkg *types.Package) {
func (c *codegen) writeJumps(b []byte) ([]byte, error) {
ctx := vm.NewContext(b)
var offsets []int
for op, _, err := ctx.Next(); err == nil && ctx.IP() < len(b); op, _, err = ctx.Next() {
for op, param, err := ctx.Next(); err == nil && ctx.IP() < len(b); op, param, err = ctx.Next() {
switch op {
case opcode.JMP, opcode.JMPIFNOT, opcode.JMPIF, opcode.CALL,
opcode.JMPEQ, opcode.JMPNE,
opcode.JMPGT, opcode.JMPGE, opcode.JMPLE, opcode.JMPLT:
case opcode.TRYL:
nextIP := ctx.NextIP()
catchArg := b[nextIP-8:]
_, err := c.replaceLabelWithOffset(ctx.IP(), catchArg)
_, err := c.replaceLabelWithOffset(ctx.IP(), param)
if err != nil {
return nil, err
}
finallyArg := b[nextIP-4:]
_, err = c.replaceLabelWithOffset(ctx.IP(), finallyArg)
_, err = c.replaceLabelWithOffset(ctx.IP(), param[4:])
if err != nil {
return nil, err
}
@ -2118,10 +2115,7 @@ func (c *codegen) writeJumps(b []byte) ([]byte, error) {
opcode.JMPEQL, opcode.JMPNEL,
opcode.JMPGTL, opcode.JMPGEL, opcode.JMPLEL, opcode.JMPLTL,
opcode.CALLL, opcode.PUSHA, opcode.ENDTRYL:
// we can't use arg returned by ctx.Next() because it is copied
nextIP := ctx.NextIP()
arg := b[nextIP-4:]
offset, err := c.replaceLabelWithOffset(ctx.IP(), arg)
offset, err := c.replaceLabelWithOffset(ctx.IP(), param)
if err != nil {
return nil, err
}