motiejus/zig
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add while loop

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This commit is contained in:
Andrew Kelley
2015-12-24 14:37:43 -07:00
parent 2e74889c3c
commit a030b60aeb
7 changed files with 99 additions and 2 deletions
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27
src/codegen.cpp
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@@ -1006,6 +1006,31 @@ static LLVMValueRef gen_struct_val_expr(CodeGen *g, AstNode *node) {
return tmp_struct_ptr;
}
static LLVMValueRef gen_while_expr(CodeGen *g, AstNode *node) {
assert(node->type == NodeTypeWhileExpr);
assert(node->data.while_expr.condition);
assert(node->data.while_expr.body);
LLVMBasicBlockRef cond_block = LLVMAppendBasicBlock(g->cur_fn->fn_value, "WhileCond");
LLVMBasicBlockRef body_block = LLVMAppendBasicBlock(g->cur_fn->fn_value, "WhileBody");
LLVMBasicBlockRef end_block = LLVMAppendBasicBlock(g->cur_fn->fn_value, "WhileEnd");
add_debug_source_node(g, node);
LLVMBuildBr(g->builder, cond_block);
LLVMPositionBuilderAtEnd(g->builder, cond_block);
LLVMValueRef cond_val = gen_expr(g, node->data.while_expr.condition);
add_debug_source_node(g, node->data.while_expr.condition);
LLVMBuildCondBr(g->builder, cond_val, body_block, end_block);
LLVMPositionBuilderAtEnd(g->builder, body_block);
gen_expr(g, node->data.while_expr.body);
LLVMBuildBr(g->builder, cond_block);
LLVMPositionBuilderAtEnd(g->builder, end_block);
return nullptr;
}
static LLVMValueRef gen_expr_no_cast(CodeGen *g, AstNode *node) {
switch (node->type) {
case NodeTypeBinOpExpr:
@@ -1067,6 +1092,8 @@ static LLVMValueRef gen_expr_no_cast(CodeGen *g, AstNode *node) {
return LLVMConstNull(LLVMInt1Type());
case NodeTypeIfExpr:
return gen_if_expr(g, node);
case NodeTypeWhileExpr:
return gen_while_expr(g, node);
case NodeTypeAsmExpr:
return gen_asm_expr(g, node);
case NodeTypeNumberLiteral: