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adding compilation of if-else statements

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cozis
2021-10-31 07:01:15 +00:00
parent 5e8fb7ef6b
commit 9eaa82297f
16 changed files with 269 additions and 25 deletions
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src/compiler/compile.c
+71 -2
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@@ -42,7 +42,8 @@ static _Bool emit_instr_for_node(ExeBuilder *exeb, Node *node, Error *error)
OperExprNode *oper = (OperExprNode*) expr;
for(Node *operand = oper->head; operand; operand = operand->next)
emit_instr_for_node(exeb, operand, error);
if(!emit_instr_for_node(exeb, operand, error))
return 0;
return ExeBuilder_Append(exeb, error,
exprkind_to_opcode(expr->kind),
@@ -84,10 +85,78 @@ static _Bool emit_instr_for_node(ExeBuilder *exeb, Node *node, Error *error)
break;
}
case NODE_IFELSE:
{
IfElseNode *ifelse = (IfElseNode*) node;
if(!emit_instr_for_node(exeb, ifelse->condition, error))
return 0;
if(ifelse->false_branch)
{
Promise *else_offset = Promise_New(ExeBuilder_GetAlloc(exeb), sizeof(long long int));
Promise *done_offset = Promise_New(ExeBuilder_GetAlloc(exeb), sizeof(long long int));
if(else_offset == NULL || done_offset == NULL)
{
Error_Report(error, 1, "No memory");
return 0;
}
Operand op = { .type = OPTP_PROMISE, .as_promise = else_offset };
if(!ExeBuilder_Append(exeb, error, OPCODE_JUMPIFNOTANDPOP, &op, 1, node->offset, node->length))
return 0;
if(!emit_instr_for_node(exeb, ifelse->true_branch, error))
return 0;
op = (Operand) { .type = OPTP_PROMISE, .as_promise = done_offset };
if(!ExeBuilder_Append(exeb, error, OPCODE_JUMP, &op, 1, node->offset, node->length))
return 0;
long long int temp = ExeBuilder_InstrCount(exeb);
Promise_Resolve(else_offset, &temp, sizeof(temp));
if(!emit_instr_for_node(exeb, ifelse->false_branch, error))
return 0;
temp = ExeBuilder_InstrCount(exeb);
Promise_Resolve(done_offset, &temp, sizeof(temp));
Promise_Free(else_offset);
Promise_Free(done_offset);
}
else
{
Promise *done_offset = Promise_New(ExeBuilder_GetAlloc(exeb), sizeof(long long int));
if(done_offset == NULL)
{
Error_Report(error, 1, "No memory");
return 0;
}
if(!ExeBuilder_Append(exeb, error, OPCODE_JUMPIFNOTANDPOP, &(Operand) { .type = OPTP_PROMISE, .as_promise = done_offset }, 1, node->offset, node->length))
return 0;
if(!emit_instr_for_node(exeb, ifelse->true_branch, error))
return 0;
long long int temp = ExeBuilder_InstrCount(exeb);
Promise_Resolve(done_offset, &temp, sizeof(temp));
Promise_Free(done_offset);
}
return 1;
}
default:
UNREACHABLE;
break;
return 0;
}
UNREACHABLE;
return 0;
}
Executable *compile(AST *ast, BPAlloc *alloc, Error *error)