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introduce align keyword

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* remove `@setGlobalAlign`
 * add align keyword for setting alignment on functions and
   variables.
 * loads and stores use alignment from pointer
 * memcpy, memset use alignment from pointer
 * add syntax for pointer alignment
 * slices can have volatile
 * add u2, i2 primitives
 * ignore preferred align and use abi align everywhere
 * back to only having alignOf builtin.
   preferredAlignOf is too tricky to be useful.
   See #432. Partial revert of
   e726925e80.

See #37
This commit is contained in:
Andrew Kelley
2017-08-29 07:30:22 -04:00
parent b8ed0cb374
commit c5c9d98065
20 changed files with 944 additions and 728 deletions
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38
src/ast_render.cpp
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@@ -65,10 +65,6 @@ static const char *prefix_op_str(PrefixOp prefix_op) {
case PrefixOpNegationWrap: return "-%";
case PrefixOpBoolNot: return "!";
case PrefixOpBinNot: return "~";
case PrefixOpAddressOf: return "&";
case PrefixOpConstAddressOf: return "&const ";
case PrefixOpVolatileAddressOf: return "&volatile ";
case PrefixOpConstVolatileAddressOf: return "&const volatile ";
case PrefixOpDereference: return "*";
case PrefixOpMaybe: return "?";
case PrefixOpError: return "%";
@@ -192,6 +188,8 @@ static const char *node_type_str(NodeType node_type) {
return "Symbol";
case NodeTypePrefixOpExpr:
return "PrefixOpExpr";
case NodeTypeAddrOfExpr:
return "AddrOfExpr";
case NodeTypeUse:
return "Use";
case NodeTypeBoolLiteral:
@@ -583,6 +581,38 @@ static void render_node_extra(AstRender *ar, AstNode *node, bool grouped) {
render_node_ungrouped(ar, node->data.prefix_op_expr.primary_expr);
break;
}
case NodeTypeAddrOfExpr:
{
fprintf(ar->f, "&");
if (node->data.addr_of_expr.align_expr != nullptr) {
fprintf(ar->f, "align ");
render_node_grouped(ar, node->data.addr_of_expr.align_expr);
if (node->data.addr_of_expr.bit_offset_start != nullptr) {
assert(node->data.addr_of_expr.bit_offset_end != nullptr);
Buf offset_start_buf = BUF_INIT;
buf_resize(&offset_start_buf, 0);
bigint_append_buf(&offset_start_buf, node->data.addr_of_expr.bit_offset_start, 10);
Buf offset_end_buf = BUF_INIT;
buf_resize(&offset_end_buf, 0);
bigint_append_buf(&offset_end_buf, node->data.addr_of_expr.bit_offset_end, 10);
fprintf(ar->f, ":%s:%s ", buf_ptr(&offset_start_buf), buf_ptr(&offset_end_buf));
} else {
fprintf(ar->f, " ");
}
}
if (node->data.addr_of_expr.is_const) {
fprintf(ar->f, "const ");
}
if (node->data.addr_of_expr.is_volatile) {
fprintf(ar->f, "volatile ");
}
render_node_ungrouped(ar, node->data.addr_of_expr.op_expr);
break;
}
case NodeTypeFnCallExpr:
{
if (node->data.fn_call_expr.is_builtin) {