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shader: Refactoring: Reduce calls of parseExpr at definings

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This commit is contained in:
Hajime Hoshi 2020-06-21 05:11:47 +09:00
parent 40e581c19f
commit ac9bb92885
3 changed files with 50 additions and 62 deletions
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96
internal/shader/shader.go
View File

@ -608,47 +608,7 @@ func (cs *compileState) parseBlock(outer *block, b *ast.BlockStmt, inParams, out
return nil, false
}
// TODO: Reduce calls of parseExpr
var rhsTypes []shaderir.Type
for i, e := range l.Lhs {
v := variable{
name: e.(*ast.Ident).Name,
}
if len(l.Lhs) == len(l.Rhs) {
ts, ok := cs.functionReturnTypes(block, l.Rhs[i])
if !ok {
_, ts, _, ok = cs.parseExpr(block, l.Rhs[i])
if !ok {
return nil, false
}
}
if len(ts) > 1 {
cs.addError(l.Pos(), fmt.Sprintf("single-value context and multiple-value context cannot be mixed"))
}
if len(ts) == 1 {
v.typ = ts[0]
}
} else {
if i == 0 {
var ok bool
rhsTypes, ok = cs.functionReturnTypes(block, l.Rhs[0])
if !ok {
_, rhsTypes, _, ok = cs.parseExpr(block, l.Rhs[0])
if !ok {
return nil, false
}
}
if len(rhsTypes) != len(l.Lhs) {
cs.addError(l.Pos(), fmt.Sprintf("single-value context and multiple-value context cannot be mixed"))
}
}
v.typ = rhsTypes[i]
}
block.vars = append(block.vars, v)
}
if !cs.assign(block, l.Pos(), l.Lhs, l.Rhs) {
if !cs.assign(block, l.Pos(), l.Lhs, l.Rhs, true) {
return nil, false
}
case token.ASSIGN:
@ -657,7 +617,7 @@ func (cs *compileState) parseBlock(outer *block, b *ast.BlockStmt, inParams, out
cs.addError(l.Pos(), fmt.Sprintf("single-value context and multiple-value context cannot be mixed"))
return nil, false
}
if !cs.assign(block, l.Pos(), l.Lhs, l.Rhs) {
if !cs.assign(block, l.Pos(), l.Lhs, l.Rhs, false) {
return nil, false
}
case token.ADD_ASSIGN, token.SUB_ASSIGN, token.MUL_ASSIGN, token.QUO_ASSIGN, token.REM_ASSIGN:
@ -768,21 +728,43 @@ func (cs *compileState) parseBlock(outer *block, b *ast.BlockStmt, inParams, out
return block, true
}
func (cs *compileState) assign(block *block, pos token.Pos, lhs, rhs []ast.Expr) bool {
func (cs *compileState) assign(block *block, pos token.Pos, lhs, rhs []ast.Expr, define bool) bool {
var rhsExprs []shaderir.Expr
for i := range lhs {
var rhsTypes []shaderir.Type
for i, e := range lhs {
// Prase RHS first for the order of the statements.
if len(lhs) == len(rhs) {
rhs, _, stmts, ok := cs.parseExpr(block, rhs[i])
r, origts, stmts, ok := cs.parseExpr(block, rhs[i])
if !ok {
return false
}
if len(rhs) > 1 {
cs.addError(pos, fmt.Sprintf("single-value context and multiple-value context cannot be mixed"))
}
block.ir.Stmts = append(block.ir.Stmts, stmts...)
lhs, _, stmts, ok := cs.parseExpr(block, lhs[i])
if define {
v := variable{
name: e.(*ast.Ident).Name,
}
ts, ok := cs.functionReturnTypes(block, rhs[i])
if !ok {
ts = origts
}
if len(ts) > 1 {
cs.addError(pos, fmt.Sprintf("single-value context and multiple-value context cannot be mixed"))
return false
}
if len(ts) == 1 {
v.typ = ts[0]
}
block.vars = append(block.vars, v)
}
if len(r) > 1 {
cs.addError(pos, fmt.Sprintf("single-value context and multiple-value context cannot be mixed"))
return false
}
l, _, stmts, ok := cs.parseExpr(block, lhs[i])
if !ok {
return false
}
@ -790,13 +772,13 @@ func (cs *compileState) assign(block *block, pos token.Pos, lhs, rhs []ast.Expr)
block.ir.Stmts = append(block.ir.Stmts, shaderir.Stmt{
Type: shaderir.Assign,
Exprs: []shaderir.Expr{lhs[0], rhs[0]},
Exprs: []shaderir.Expr{l[0], r[0]},
})
} else {
if i == 0 {
var stmts []shaderir.Stmt
var ok bool
rhsExprs, _, stmts, ok = cs.parseExpr(block, rhs[0])
rhsExprs, rhsTypes, stmts, ok = cs.parseExpr(block, rhs[0])
if !ok {
return false
}
@ -806,7 +788,15 @@ func (cs *compileState) assign(block *block, pos token.Pos, lhs, rhs []ast.Expr)
block.ir.Stmts = append(block.ir.Stmts, stmts...)
}
lhs, _, stmts, ok := cs.parseExpr(block, lhs[i])
if define {
v := variable{
name: e.(*ast.Ident).Name,
}
v.typ = rhsTypes[i]
block.vars = append(block.vars, v)
}
l, _, stmts, ok := cs.parseExpr(block, lhs[i])
if !ok {
return false
}
@ -814,7 +804,7 @@ func (cs *compileState) assign(block *block, pos token.Pos, lhs, rhs []ast.Expr)
block.ir.Stmts = append(block.ir.Stmts, shaderir.Stmt{
Type: shaderir.Assign,
Exprs: []shaderir.Expr{lhs[0], rhsExprs[i]},
Exprs: []shaderir.Expr{l[0], rhsExprs[i]},
})
}
}

8
internal/shader/testdata/define2.expected.vs vendored
View File

@ -3,12 +3,10 @@ void F0(out vec2 l0) {
vec2 l2 = vec2(0);
vec2 l3 = vec2(0);
vec2 l4 = vec2(0);
vec2 l5 = vec2(0);
vec2 l6 = vec2(0);
F1(l1);
l2 = (1.0) * (l1);
F1(l3);
l2 = (1.0) * (l3);
F1(l6);
l5 = (l6) * (1.0);
l4 = (l3) * (1.0);
l0 = l2;
return;
}

8
internal/shader/testdata/define_multiple.expected.vs vendored
View File

@ -3,10 +3,10 @@ void F0(in vec2 l0, out vec4 l1) {
float l3 = float(0);
float l4 = float(0);
float l5 = float(0);
F1(l4, l5);
l2 = l4;
l3 = l5;
l1 = vec4(l0, l2, l2);
F1(l2, l3);
l4 = l2;
l5 = l3;
l1 = vec4(l0, l4, l4);
return;
}