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add error for break outside loop

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also fix break in nested loops
This commit is contained in:
Andrew Kelley
2015-12-24 15:30:32 -07:00
parent 5ceaae288c
commit 44ca5e19dc
4 changed files with 35 additions and 10 deletions
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12
src/codegen.cpp
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@@ -1024,10 +1024,12 @@ static LLVMValueRef gen_while_expr(CodeGen *g, AstNode *node) {
LLVMBuildCondBr(g->builder, cond_val, body_block, end_block);
LLVMPositionBuilderAtEnd(g->builder, body_block);
g->cur_break_block = end_block;
g->break_block_stack.append(end_block);
gen_expr(g, node->data.while_expr.body);
g->cur_break_block = nullptr;
LLVMBuildBr(g->builder, cond_block);
g->break_block_stack.pop();
if (get_expr_type(node->data.while_expr.body)->id != TypeTableEntryIdUnreachable) {
LLVMBuildBr(g->builder, cond_block);
}
LLVMPositionBuilderAtEnd(g->builder, end_block);
return nullptr;
@@ -1035,10 +1037,10 @@ static LLVMValueRef gen_while_expr(CodeGen *g, AstNode *node) {
static LLVMValueRef gen_break(CodeGen *g, AstNode *node) {
assert(node->type == NodeTypeBreak);
assert(g->cur_break_block);
LLVMBasicBlockRef dest_block = g->break_block_stack.last();
add_debug_source_node(g, node);
return LLVMBuildBr(g->builder, g->cur_break_block);
return LLVMBuildBr(g->builder, dest_block);
}
static LLVMValueRef gen_expr_no_cast(CodeGen *g, AstNode *node) {