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// Copyright 2011 Google Inc. All Rights Reserved.
// This file is available under the Apache license.
package vm
import (
"strings"
"testing"
"github.com/kylelemons/godebug/pretty"
)
var testCodeGenPrograms = []struct {
name string
source string
prog []instr // expected bytecode
}{
// Composite literals require too many explicit conversions.
{"simple line counter",
"counter line_count\n/$/ { line_count++\n }\n",
[]instr{
instr{match, 0},
instr{jnm, 7},
instr{setmatched, false},
instr{mload, 0},
instr{dload, 0},
instr{inc, nil},
instr{setmatched, true}}},
{"count a",
"counter a_count\n/a$/ { a_count++\n }\n",
[]instr{
instr{match, 0},
instr{jnm, 7},
instr{setmatched, false},
instr{mload, 0},
instr{dload, 0},
instr{inc, nil},
instr{setmatched, true}}},
{"strptime and capref",
"counter foo\n" +
"/(.*)/ { strptime($1, \"2006-01-02T15:04:05\")\n" +
"foo++\n}\n",
[]instr{
instr{match, 0},
instr{jnm, 11},
instr{setmatched, false},
instr{push, 0},
instr{capref, 0},
instr{str, 0},
instr{strptime, 2},
instr{mload, 0},
instr{dload, 0},
instr{inc, nil},
instr{setmatched, true}}},
{"strptime and named capref",
"counter foo\n" +
"/(?P<date>.*)/ { strptime($date, \"2006-01-02T15:04:05\")\n" +
"foo++\n }\n",
[]instr{
instr{match, 0},
instr{jnm, 11},
instr{setmatched, false},
instr{push, 0},
instr{capref, 1},
instr{str, 0},
instr{strptime, 2},
instr{mload, 0},
instr{dload, 0},
instr{inc, nil},
instr{setmatched, true}}},
{"inc by and set",
"counter foo\ncounter bar\n" +
"/(.*)/ {\n" +
"foo += $1\n" +
"bar = $1\n" +
"}\n",
[]instr{
instr{match, 0},
instr{jnm, 17},
instr{setmatched, false},
instr{mload, 0},
instr{dload, 0},
instr{mload, 0},
instr{dload, 0},
instr{push, 0},
instr{capref, 0},
instr{add, nil},
instr{set, nil},
instr{mload, 1},
instr{dload, 0},
instr{push, 0},
instr{capref, 0},
instr{set, nil},
instr{setmatched, true}}},
{"cond expr gt",
"counter foo\n" +
"1 > 0 {\n" +
" foo++\n" +
"}\n",
[]instr{
instr{push, 1},
instr{push, 0},
instr{cmp, 1},
instr{jnm, 9},
instr{setmatched, false},
instr{mload, 0},
instr{dload, 0},
instr{inc, nil},
instr{setmatched, true}}},
{"cond expr lt",
"counter foo\n" +
"1 < 0 {\n" +
" foo++\n" +
"}\n",
[]instr{
instr{push, 1},
instr{push, 0},
instr{cmp, -1},
instr{jnm, 9},
instr{setmatched, false},
instr{mload, 0},
instr{dload, 0},
instr{inc, nil},
instr{setmatched, true}}},
{"cond expr eq",
"counter foo\n" +
"1 == 0 {\n" +
" foo++\n" +
"}\n",
[]instr{
instr{push, 1},
instr{push, 0},
instr{cmp, 0},
instr{jnm, 9},
instr{setmatched, false},
instr{mload, 0},
instr{dload, 0},
instr{inc, nil},
instr{setmatched, true}}},
{"cond expr le",
"counter foo\n" +
"1 <= 0 {\n" +
" foo++\n" +
"}\n",
[]instr{
instr{push, 1},
instr{push, 0},
instr{cmp, 1},
instr{jm, 9},
instr{setmatched, false},
instr{mload, 0},
instr{dload, 0},
instr{inc, nil},
instr{setmatched, true}}},
{"cond expr ge",
"counter foo\n" +
"1 >= 0 {\n" +
" foo++\n" +
"}\n",
[]instr{
instr{push, 1},
instr{push, 0},
instr{cmp, -1},
instr{jm, 9},
instr{setmatched, false},
instr{mload, 0},
instr{dload, 0},
instr{inc, nil},
instr{setmatched, true}}},
{"cond expr ne",
"counter foo\n" +
"1 != 0 {\n" +
" foo++\n" +
"}\n",
[]instr{
instr{push, 1},
instr{push, 0},
instr{cmp, 0},
instr{jm, 9},
instr{setmatched, false},
instr{mload, 0},
instr{dload, 0},
instr{inc, nil},
instr{setmatched, true}}},
{"nested cond",
"counter foo\n" +
"/(.*)/ {\n" +
" $1 <= 1 {\n" +
" foo++\n" +
" }\n" +
"}\n",
[]instr{
instr{match, 0},
instr{jnm, 14},
instr{setmatched, false},
instr{push, 0},
instr{capref, 0},
instr{push, 1},
instr{cmp, 1},
instr{jm, 13},
instr{setmatched, false},
instr{mload, 0},
instr{dload, 0},
instr{inc, nil},
instr{setmatched, true},
instr{setmatched, true}}},
{"deco",
"counter foo\n" +
"counter bar\n" +
"def foo {\n" +
" /.*/ {\n" +
" foo++\n" +
" next\n" +
" }\n" +
"}\n" +
"" +
"@foo { bar++\n }\n",
[]instr{
instr{match, 0},
instr{jnm, 10},
instr{setmatched, false},
instr{mload, 0},
instr{dload, 0},
instr{inc, nil},
instr{mload, 1},
instr{dload, 0},
instr{inc, nil},
instr{setmatched, true}}},
{"length",
"len(\"foo\") > 0 {\n" +
"}\n",
[]instr{
instr{str, 0},
instr{length, 1},
instr{push, 0},
instr{cmp, 1},
instr{jnm, 7},
instr{setmatched, false},
instr{setmatched, true}}},
{"bitwise", `
1 & 7 ^ 15 | 8
~ 16 << 2
1 >> 20
`,
[]instr{
instr{push, 1},
instr{push, 7},
instr{and, nil},
instr{push, 15},
instr{xor, nil},
instr{push, 8},
instr{or, nil},
instr{push, 16},
instr{not, nil},
instr{push, 2},
instr{shl, nil},
instr{push, 1},
instr{push, 20},
instr{shr, nil}}},
{"pow", `
counter a
counter b
a ** b
`,
[]instr{
instr{mload, 0},
instr{dload, 0},
instr{mload, 1},
instr{dload, 0},
instr{pow, nil}}},
{"indexed expr", `
counter a by b
a["string"]++
`,
[]instr{
instr{str, 0},
instr{mload, 0},
instr{dload, 1},
instr{inc, nil}}},
{"strtol", `
strtol("deadbeef", 16)
`,
[]instr{
instr{str, 0},
instr{push, 16},
instr{strtol, 2}}},
{"float", `
20.0
`,
[]instr{
instr{push, 20.0}}},
{"otherwise", `
counter a
otherwise {
a++
}
`,
[]instr{
instr{otherwise, nil},
instr{jnm, 7},
instr{setmatched, false},
instr{mload, 0},
instr{dload, 0},
instr{inc, nil},
instr{setmatched, true}}},
{"cond else",
`counter foo
counter bar
1 > 0 {
foo++
} else {
bar++
}`,
[]instr{
instr{push, 1},
instr{push, 0},
instr{cmp, 1},
instr{jnm, 10},
instr{setmatched, false},
instr{mload, 0},
instr{dload, 0},
instr{inc, nil},
instr{setmatched, true},
instr{jmp, 13},
instr{mload, 1},
instr{dload, 0},
instr{inc, nil},
},
},
{"mod",
`
3 % 1
`,
[]instr{
instr{push, 3},
instr{push, 1},
instr{mod, nil},
},
},
}
func TestCodegen(t *testing.T) {
for _, tc := range testCodeGenPrograms {
ast, err := Parse(tc.name, strings.NewReader(tc.source))
if err != nil {
t.Fatalf("Unexpected parse failure in %q: %s", tc.name, err)
}
err = Check(ast)
if err != nil {
t.Fatalf("Unexpected check failure in %q: %s", tc.name, err)
}
obj, err := CodeGen(tc.name, ast)
if err != nil {
t.Errorf("Compile errors for %q:\n%q", tc.name, err)
continue
}
diff := pretty.Compare(tc.prog, obj.prog)
if len(diff) > 0 {
t.Errorf("%s: VM prog doesn't match.\n%s", tc.name, diff)
}
}
}
|
