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flow_test.go
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package cxgo
import (
"fmt"
"os"
"os/exec"
"path/filepath"
"strings"
"testing"
"github.com/stretchr/testify/require"
"github.com/gotranspile/cxgo/libs"
"github.com/gotranspile/cxgo/types"
)
func numStmt(n int) CStmt {
return NewCExprStmt1(&CallExpr{
Fun: FuncIdent{types.NewIdent("foo", types.UnkT(1))},
Args: []Expr{cIntLit(int64(n), 10)},
})
}
func varDecl(n int) CStmt {
return &CDeclStmt{&CVarDecl{
CVarSpec: CVarSpec{
Type: types.NamedT("bar", types.UnkT(1)),
Names: []*types.Ident{
types.NewIdent(fmt.Sprintf("foo%d", n), types.UnkT(1)),
},
Inits: []Expr{
cIntLit(int64(n), 10),
},
},
}}
}
func numCond(n int) BoolExpr {
return BoolIdent{types.NewIdent(fmt.Sprintf("%d", n), types.BoolT())}
}
func ret(n int) CStmt {
return &CReturnStmt{Expr: cIntLit(int64(n), 10)}
}
func newBlock(stmts ...CStmt) *BlockStmt {
return &BlockStmt{Stmts: stmts}
}
var casesControlFlow = []struct {
name string
tree []CStmt
exp string
dom string
flat string
}{
{
name: "return",
tree: []CStmt{
ret(1),
},
exp: `
n2[label="return 1",shape="box"];
n1->n2;
`,
dom: `
n2[label="return 1",shape="box"];
n1->n2;
`,
flat: `
return 1
`,
},
{
name: "no return",
tree: []CStmt{
numStmt(1),
},
exp: `
n2[label="foo(1)",shape="box"];
n3[label="return",shape="box"];
n1->n2;
n2->n3;
n3->n2[color="#99999955"];
`,
dom: `
n2[label="foo(1)",shape="box"];
n3[label="return",shape="box"];
n1->n2;
n2->n3;
`,
flat: `
foo(1)
goto L_1
L_1:
return
`,
},
{
name: "code and return",
tree: []CStmt{
numStmt(1),
ret(2),
},
exp: `
n2[label="foo(1)",shape="box"];
n3[label="return 2",shape="box"];
n1->n2;
n2->n3;
n3->n2[color="#99999955"];
`,
dom: `
n2[label="foo(1)",shape="box"];
n3[label="return 2",shape="box"];
n1->n2;
n2->n3;
`,
flat: `
foo(1)
goto L_1
L_1:
return 2
`,
},
{
name: "code and return 2",
tree: []CStmt{
numStmt(1),
numStmt(2),
ret(3),
},
exp: `
n2[label="foo(1)\nfoo(2)",shape="box"];
n3[label="return 3",shape="box"];
n1->n2;
n2->n3;
n3->n2[color="#99999955"];
`,
dom: `
n2[label="foo(1)\nfoo(2)",shape="box"];
n3[label="return 3",shape="box"];
n1->n2;
n2->n3;
`,
flat: `
foo(1)
foo(2)
goto L_1
L_1:
return 3
`,
},
{
name: "code with decls",
tree: []CStmt{
&CIfStmt{Cond: numCond(1), Then: newBlock(varDecl(1))},
varDecl(2),
ret(1),
},
exp: `
n2[label="if 1",shape="hexagon"];
n3[label="var foo1 bar = 1",shape="box"];
n4[label="var foo2 bar = 2",shape="box"];
n5[label="return 1",shape="box"];
n1->n2;
n2->n3[color="#00aa00"];
n2->n4[color="#aa0000"];
n3->n2[color="#99999955"];
n3->n4;
n4->n3[color="#99999955"];
n4->n2[color="#99999955"];
n4->n5;
n5->n4[color="#99999955"];
`,
dom: `
n2[label="if 1",shape="hexagon"];
n3[label="var foo1 bar = 1",shape="box"];
n4[label="var foo2 bar = 2",shape="box"];
n5[label="return 1",shape="box"];
n1->n2;
n2->n3;
n2->n4;
n4->n5;
`,
flat: `
var foo1 bar
var foo2 bar
if 1 {
goto L_1
} else {
goto L_2
}
L_1:
foo1 = 1
goto L_2
L_2:
foo2 = 2
goto L_3
L_3:
return 1
`,
},
{
name: "if",
tree: []CStmt{
&CIfStmt{Cond: numCond(1), Then: newBlock(numStmt(2))},
numStmt(3),
numStmt(4),
ret(5),
},
exp: `
n2[label="if 1",shape="hexagon"];
n3[label="foo(2)",shape="box"];
n4[label="foo(3)\nfoo(4)",shape="box"];
n5[label="return 5",shape="box"];
n1->n2;
n2->n3[color="#00aa00"];
n2->n4[color="#aa0000"];
n3->n2[color="#99999955"];
n3->n4;
n4->n3[color="#99999955"];
n4->n2[color="#99999955"];
n4->n5;
n5->n4[color="#99999955"];
`,
dom: `
n2[label="if 1",shape="hexagon"];
n3[label="foo(2)",shape="box"];
n4[label="foo(3)\nfoo(4)",shape="box"];
n5[label="return 5",shape="box"];
n1->n2;
n2->n3;
n2->n4;
n4->n5;
`,
flat: `
if 1 {
goto L_1
} else {
goto L_2
}
L_1:
foo(2)
goto L_2
L_2:
foo(3)
foo(4)
goto L_3
L_3:
return 5
`,
},
{
name: "if else",
tree: []CStmt{
&CIfStmt{Cond: numCond(1), Then: newBlock(numStmt(2)), Else: newBlock(numStmt(3))},
ret(4),
},
exp: `
n2[label="if 1",shape="hexagon"];
n3[label="foo(2)",shape="box"];
n4[label="return 4",shape="box"];
n5[label="foo(3)",shape="box"];
n1->n2;
n2->n3[color="#00aa00"];
n2->n5[color="#aa0000"];
n3->n2[color="#99999955"];
n3->n4;
n4->n3[color="#99999955"];
n4->n5[color="#99999955"];
n5->n2[color="#99999955"];
n5->n4;
`,
dom: `
n2[label="if 1",shape="hexagon"];
n3[label="foo(2)",shape="box"];
n4[label="return 4",shape="box"];
n5[label="foo(3)",shape="box"];
n1->n2;
n2->n3;
n2->n4;
n2->n5;
`,
flat: `
if 1 {
goto L_1
} else {
goto L_3
}
L_1:
foo(2)
goto L_2
L_2:
return 4
L_3:
foo(3)
goto L_2
`,
},
{
name: "if return else",
tree: []CStmt{
&CIfStmt{Cond: numCond(1), Then: newBlock(ret(2)), Else: newBlock(numStmt(3))},
ret(4),
},
exp: `
n2[label="if 1",shape="hexagon"];
n3[label="return 2",shape="box"];
n4[label="foo(3)",shape="box"];
n5[label="return 4",shape="box"];
n1->n2;
n2->n3[color="#00aa00"];
n2->n4[color="#aa0000"];
n3->n2[color="#99999955"];
n4->n2[color="#99999955"];
n4->n5;
n5->n4[color="#99999955"];
`,
dom: `
n2[label="if 1",shape="hexagon"];
n3[label="return 2",shape="box"];
n4[label="foo(3)",shape="box"];
n5[label="return 4",shape="box"];
n1->n2;
n2->n3;
n2->n4;
n4->n5;
`,
flat: `
if 1 {
goto L_1
} else {
goto L_2
}
L_1:
return 2
L_2:
foo(3)
goto L_3
L_3:
return 4
`,
},
{
name: "if else return",
tree: []CStmt{
&CIfStmt{Cond: numCond(1), Then: newBlock(numStmt(2)), Else: newBlock(ret(3))},
ret(4),
},
exp: `
n2[label="if 1",shape="hexagon"];
n3[label="foo(2)",shape="box"];
n4[label="return 4",shape="box"];
n5[label="return 3",shape="box"];
n1->n2;
n2->n3[color="#00aa00"];
n2->n5[color="#aa0000"];
n3->n2[color="#99999955"];
n3->n4;
n4->n3[color="#99999955"];
n5->n2[color="#99999955"];
`,
dom: `
n2[label="if 1",shape="hexagon"];
n3[label="foo(2)",shape="box"];
n4[label="return 4",shape="box"];
n5[label="return 3",shape="box"];
n1->n2;
n2->n3;
n2->n5;
n3->n4;
`,
flat: `
if 1 {
goto L_1
} else {
goto L_3
}
L_1:
foo(2)
goto L_2
L_2:
return 4
L_3:
return 3
`,
},
{
name: "if all return",
tree: []CStmt{
&CIfStmt{Cond: numCond(1), Then: newBlock(ret(2)), Else: newBlock(ret(3))},
},
exp: `
n2[label="if 1",shape="hexagon"];
n3[label="return 2",shape="box"];
n4[label="return 3",shape="box"];
n1->n2;
n2->n3[color="#00aa00"];
n2->n4[color="#aa0000"];
n3->n2[color="#99999955"];
n4->n2[color="#99999955"];
`,
dom: `
n2[label="if 1",shape="hexagon"];
n3[label="return 2",shape="box"];
n4[label="return 3",shape="box"];
n1->n2;
n2->n3;
n2->n4;
`,
flat: `
if 1 {
goto L_1
} else {
goto L_2
}
L_1:
return 2
L_2:
return 3
`,
},
{
name: "if all return unreachable",
tree: []CStmt{
&CIfStmt{Cond: numCond(1), Then: newBlock(ret(2)), Else: newBlock(ret(3))},
ret(4),
},
exp: `
n2[label="if 1",shape="hexagon"];
n3[label="return 2",shape="box"];
n4[label="return 3",shape="box"];
n1->n2;
n2->n3[color="#00aa00"];
n2->n4[color="#aa0000"];
n3->n2[color="#99999955"];
n4->n2[color="#99999955"];
`,
dom: `
n2[label="if 1",shape="hexagon"];
n3[label="return 2",shape="box"];
n4[label="return 3",shape="box"];
n1->n2;
n2->n3;
n2->n4;
`,
flat: `
if 1 {
goto L_1
} else {
goto L_2
}
L_1:
return 2
L_2:
return 3
`,
},
{
name: "switch",
tree: []CStmt{
&CSwitchStmt{
Cond: cIntLit(1, 10),
Cases: []*CCaseStmt{
{Expr: cIntLit(1, 10), Stmts: []CStmt{numStmt(1)}},
{Expr: cIntLit(2, 10), Stmts: []CStmt{numStmt(2)}},
{Expr: cIntLit(3, 10), Stmts: []CStmt{numStmt(3), &CBreakStmt{}}},
{Stmts: []CStmt{numStmt(4)}},
},
},
ret(1),
},
exp: `
n2[label="switch 1",shape="trapezium"];
n3[label="foo(1)",shape="box"];
n4[label="foo(2)",shape="box"];
n5[label="foo(3)",shape="box"];
n6[label="return 1",shape="box"];
n7[label="foo(4)",shape="box"];
n1->n2;
n2->n3[label="1"];
n2->n4[label="2"];
n2->n5[label="3"];
n2->n7[color="#aa0000"];
n3->n2[color="#99999955"];
n3->n4;
n4->n2[color="#99999955"];
n4->n3[color="#99999955"];
n4->n5;
n5->n2[color="#99999955"];
n5->n4[color="#99999955"];
n5->n6;
n6->n7[color="#99999955"];
n6->n5[color="#99999955"];
n7->n2[color="#99999955"];
n7->n6;
`,
dom: `
n2[label="switch 1",shape="trapezium"];
n3[label="foo(1)",shape="box"];
n4[label="foo(2)",shape="box"];
n5[label="foo(3)",shape="box"];
n6[label="return 1",shape="box"];
n7[label="foo(4)",shape="box"];
n1->n2;
n2->n3;
n2->n4;
n2->n5;
n2->n6;
n2->n7;
`,
flat: `
switch 1 {
case 1:
goto L_1
case 2:
goto L_2
case 3:
goto L_3
default:
goto L_5
}
L_1:
foo(1)
goto L_2
L_2:
foo(2)
goto L_3
L_3:
foo(3)
goto L_4
L_4:
return 1
L_5:
foo(4)
goto L_4
`,
},
{
name: "switch no default",
tree: []CStmt{
&CSwitchStmt{
Cond: cIntLit(1, 10),
Cases: []*CCaseStmt{
{Expr: cIntLit(1, 10), Stmts: []CStmt{numStmt(1)}},
{Expr: cIntLit(2, 10), Stmts: []CStmt{&CBreakStmt{}}},
{Expr: cIntLit(3, 10), Stmts: []CStmt{numStmt(3), &CBreakStmt{}}},
},
},
ret(1),
},
exp: `
n2[label="switch 1",shape="trapezium"];
n3[label="foo(1)",shape="box"];
n4[label="return 1",shape="box"];
n5[label="foo(3)",shape="box"];
n1->n2;
n2->n3[label="1"];
n2->n4[label="2"];
n2->n5[label="3"];
n2->n4[color="#aa0000"];
n3->n2[color="#99999955"];
n3->n4;
n4->n5[color="#99999955"];
n4->n2[color="#99999955"];
n4->n3[color="#99999955"];
n5->n2[color="#99999955"];
n5->n4;
`,
dom: `
n2[label="switch 1",shape="trapezium"];
n3[label="foo(1)",shape="box"];
n4[label="return 1",shape="box"];
n5[label="foo(3)",shape="box"];
n1->n2;
n2->n3;
n2->n4;
n2->n5;
`,
flat: `
switch 1 {
case 1:
goto L_1
case 2:
goto L_2
case 3:
goto L_3
default:
goto L_2
}
L_1:
foo(1)
goto L_2
L_2:
return 1
L_3:
foo(3)
goto L_2
`,
},
{
name: "goto",
tree: []CStmt{
numStmt(1),
&CIfStmt{
Cond: numCond(1),
Then: newBlock(
numStmt(2),
&CGotoStmt{Label: "L1"},
),
},
&CLabelStmt{Label: "L1"},
ret(3),
},
exp: `
n2[label="foo(1)",shape="box"];
n3[label="if 1",shape="hexagon"];
n4[label="foo(2)",shape="box"];
n5[label="return 3",shape="box"];
n1->n2;
n2->n3;
n3->n2[color="#99999955"];
n3->n4[color="#00aa00"];
n3->n5[color="#aa0000"];
n4->n3[color="#99999955"];
n4->n5;
n5->n4[color="#99999955"];
n5->n3[color="#99999955"];
`,
dom: `
n2[label="foo(1)",shape="box"];
n3[label="if 1",shape="hexagon"];
n4[label="foo(2)",shape="box"];
n5[label="return 3",shape="box"];
n1->n2;
n2->n3;
n3->n4;
n3->n5;
`,
flat: `
foo(1)
goto L_1
L_1:
if 1 {
goto L_2
} else {
goto L_3
}
L_2:
foo(2)
goto L_3
L_3:
return 3
`,
},
{
name: "goto loop",
tree: []CStmt{
numStmt(0),
&CLabelStmt{Label: "L1"},
&CIfStmt{
Cond: numCond(1),
Then: newBlock(
numStmt(1),
&CGotoStmt{Label: "L1"},
),
},
ret(3),
},
exp: `
n2[label="foo(0)",shape="box"];
n3[label="if 1",shape="hexagon"];
n4[label="foo(1)",shape="box"];
n5[label="return 3",shape="box"];
n1->n2;
n2->n3;
n3->n4[color="#99999955"];
n3->n2[color="#99999955"];
n3->n4[color="#00aa00"];
n3->n5[color="#aa0000"];
n4->n3[color="#99999955"];
n4->n3;
n5->n3[color="#99999955"];
`,
dom: `
n2[label="foo(0)",shape="box"];
n3[label="if 1",shape="hexagon"];
n4[label="foo(1)",shape="box"];
n5[label="return 3",shape="box"];
n1->n2;
n2->n3;
n3->n4;
n3->n5;
`,
flat: `
foo(0)
goto L_1
L_1:
if 1 {
goto L_2
} else {
goto L_3
}
L_2:
foo(1)
goto L_1
L_3:
return 3
`,
},
{
name: "for infinite empty",
tree: []CStmt{
&CForStmt{},
ret(2),
},
exp: `
n2[label="",shape="box"];
n1->n2;
n2->n2[color="#99999955"];
n2->n2;
`,
dom: `
n2[label="",shape="box"];
n1->n2;
`,
flat: `
L_1:
goto L_1
`,
},
{
name: "for infinite",
tree: []CStmt{
&CForStmt{Body: *newBlock(numStmt(1))},
ret(2),
},
exp: `
n2[label="foo(1)",shape="box"];
n1->n2;
n2->n2[color="#99999955"];
n2->n2;
`,
dom: `
n2[label="foo(1)",shape="box"];
n1->n2;
`,
flat: `
L_1:
foo(1)
goto L_1
`,
},
{
name: "for infinite break",
tree: []CStmt{
&CForStmt{Body: *newBlock(
numStmt(1),
&CBreakStmt{},
)},
ret(2),
},
exp: `
n2[label="foo(1)",shape="box"];
n3[label="return 2",shape="box"];
n1->n2;
n2->n3;
n3->n2[color="#99999955"];
`,
dom: `
n2[label="foo(1)",shape="box"];
n3[label="return 2",shape="box"];
n1->n2;
n2->n3;
`,
flat: `
foo(1)
goto L_1
L_1:
return 2
`,
},
{
name: "for infinite continue",
tree: []CStmt{
&CForStmt{Body: *newBlock(
numStmt(1),
&CContinueStmt{},
)},
ret(2),
},
exp: `
n2[label="foo(1)",shape="box"];
n1->n2;
n2->n2[color="#99999955"];
n2->n2;
`,
dom: `
n2[label="foo(1)",shape="box"];
n1->n2;
`,
flat: `
L_1:
foo(1)
goto L_1
`,
},
{
name: "for cond",
tree: []CStmt{
&CForStmt{Cond: cIntLit(1, 10), Body: *newBlock(
numStmt(1),
)},
ret(2),
},
exp: `
n2[label="if false",shape="hexagon"];
n3[label="foo(1)",shape="box"];
n4[label="return 2",shape="box"];
n1->n2;
n2->n3[color="#99999955"];
n2->n4[color="#00aa00"];
n2->n3[color="#aa0000"];
n3->n2[color="#99999955"];
n3->n2;
n4->n2[color="#99999955"];
`,
dom: `
n2[label="if false",shape="hexagon"];
n3[label="return 2",shape="box"];
n4[label="foo(1)",shape="box"];
n1->n2;
n2->n3;
n2->n4;
`,
flat: `
L_1:
if false {
goto L_2
} else {
goto L_3
}
L_2:
return 2
L_3:
foo(1)
goto L_1
`,
},
{
name: "for cond break",
tree: []CStmt{
&CForStmt{
Cond: cIntLit(1, 10),
Body: *newBlock(
&CIfStmt{
Cond: numCond(2),
Then: newBlock(
numStmt(3),
&CBreakStmt{},
),
},
numStmt(4),
),
},
ret(5),
},
exp: `
n2[label="if false",shape="hexagon"];
n3[label="foo(4)",shape="box"];
n4[label="if 2",shape="hexagon"];
n5[label="foo(3)",shape="box"];
n6[label="return 5",shape="box"];
n1->n2;
n2->n3[color="#99999955"];
n2->n6[color="#00aa00"];
n2->n4[color="#aa0000"];
n3->n4[color="#99999955"];
n3->n2;
n4->n2[color="#99999955"];
n4->n5[color="#00aa00"];
n4->n3[color="#aa0000"];
n5->n4[color="#99999955"];
n5->n6;
n6->n5[color="#99999955"];
n6->n2[color="#99999955"];
`,
dom: `
n2[label="if false",shape="hexagon"];
n3[label="return 5",shape="box"];
n4[label="if 2",shape="hexagon"];
n5[label="foo(3)",shape="box"];
n6[label="foo(4)",shape="box"];
n1->n2;
n2->n3;
n2->n4;
n4->n5;
n4->n6;
`,
flat: `
L_1:
if false {
goto L_2
} else {
goto L_3
}
L_2:
return 5
L_3:
if 2 {
goto L_4
} else {
goto L_5
}
L_4:
foo(3)
goto L_2
L_5:
foo(4)
goto L_1
`,
},
{
name: "for cond nested",
tree: []CStmt{
&CForStmt{Cond: cIntLit(2, 10), Body: *newBlock(
numStmt(2),
&CForStmt{Cond: cIntLit(3, 10), Body: *newBlock(
numStmt(3),
)},
)},
ret(1),
},
exp: `
n2[label="if 2 == 0",shape="hexagon"];
n3[label="if 3 == 0",shape="hexagon"];
n4[label="foo(3)",shape="box"];
n5[label="foo(2)",shape="box"];
n6[label="return 1",shape="box"];
n1->n2;
n2->n3[color="#99999955"];
n2->n6[color="#00aa00"];
n2->n5[color="#aa0000"];
n3->n4[color="#99999955"];
n3->n5[color="#99999955"];
n3->n2[color="#00aa00"];
n3->n4[color="#aa0000"];
n4->n3[color="#99999955"];
n4->n3;
n5->n2[color="#99999955"];
n5->n3;
n6->n2[color="#99999955"];
`,
dom: `
n2[label="if 2 == 0",shape="hexagon"];
n3[label="return 1",shape="box"];
n4[label="foo(2)",shape="box"];
n5[label="if 3 == 0",shape="hexagon"];
n6[label="foo(3)",shape="box"];
n1->n2;
n2->n3;
n2->n4;
n4->n5;
n5->n6;
`,
flat: `
L_1:
if 2 == 0 {
goto L_2
} else {
goto L_3
}
L_2:
return 1
L_3:
foo(2)
goto L_4
L_4:
if 3 == 0 {
goto L_1
} else {
goto L_5
}
L_5:
foo(3)
goto L_4
`,
},
{
name: "for cond nested 2",
tree: []CStmt{
&CForStmt{Cond: cIntLit(2, 10), Body: *newBlock(
numStmt(2),
&CForStmt{Cond: cIntLit(3, 10), Body: *newBlock(
numStmt(3),
)},
numStmt(4),
)},
ret(1),
},