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tint: Add sem::Expression

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A new base class for sem::ValueExpression, which other types of
expression can derive from.

Example: sem::TypeExpression - an expression that resolves to a type.

Bug: tint:1810
Change-Id: I90dfb66b265b67d9fdf0c04eb3dce2442c7e18ea
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/118404
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: James Price <jrprice@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>
This commit is contained in:
Ben Clayton
2023-02-05 22:59:40 +00:00
committed by Dawn LUCI CQ
parent ef1811a18b
commit 0b4a2f1f50
55 changed files with 295 additions and 156 deletions
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8
src/tint/transform/direct_variable_access.cc
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@@ -216,7 +216,7 @@ struct DirectVariableAccess::State {
// are grown and moved up the expression tree. After this stage, we are left with all the
// expression access chains to variables that we may need to transform.
for (auto* node : ctx.src->ASTNodes().Objects()) {
if (auto* expr = sem.Get<sem::ValueExpression>(node)) {
if (auto* expr = sem.GetVal(node)) {
AppendAccessChain(expr);
}
}
@@ -464,7 +464,7 @@ struct DirectVariableAccess::State {
[&](const ast::Let*) {
if (variable->Type()->Is<type::Pointer>()) {
// variable is a pointer-let.
auto* init = sem.Get(variable->Declaration()->initializer);
auto* init = sem.GetVal(variable->Declaration()->initializer);
// Note: We do not use take_chain() here, as we need to preserve the
// AccessChain on the let's initializer, as the let needs its
// initializer updated, and the let may be used multiple times. Instead
@@ -498,7 +498,7 @@ struct DirectVariableAccess::State {
// If this is a '&' or '*', simply move the chain to the unary op expression.
if (unary->op == ast::UnaryOp::kAddressOf ||
unary->op == ast::UnaryOp::kIndirection) {
take_chain(sem.Get(unary->expr));
take_chain(sem.GetVal(unary->expr));
}
}
});
@@ -990,7 +990,7 @@ struct DirectVariableAccess::State {
return nullptr; // Just clone the expression.
}
auto* expr = sem.Get(ast_expr);
auto* expr = sem.GetVal(ast_expr);
if (!expr) {
// No semantic node for the expression.
return nullptr; // Just clone the expression.