Fix stack growth and parameter passing

src/ast.c

@@ -964,6 +964,7 @@ static void spill2stack_visitor(AST **aptr, AST *stmt, AST *stmtPrev, AST *chunk
 			offset->nodeKind = AST_EXPR_PRIMITIVE;
 			offset->type = rsp->type;
 			offset->val = -this->stackGrowth; // This will be affected by the other part of this pass, so we must reverse
+			offset->stackGrowth = true;
 			
 			ASTExprBinaryOp *bop = calloc(1, sizeof(*bop));
 			bop->nodeKind = AST_EXPR_BINARY_OP;
@@ -981,10 +982,10 @@ static void spill2stack_visitor(AST **aptr, AST *stmt, AST *stmtPrev, AST *chunk
 			*aptr = (AST*) deref;
 		}
 		
-	} else if(a->nodeKind == AST_EXPR_BINARY_OP && a->exprBinOp.operands[0]->nodeKind == AST_EXPR_STACK_POINTER && a->exprBinOp.operands[1]->nodeKind == AST_EXPR_PRIMITIVE) {
+	} else if(a->nodeKind == AST_EXPR_PRIMITIVE && a->exprPrim.stackGrowth) {
 		
 		// Guaranteed to not require more dumbification
-		a->exprBinOp.operands[1]->exprPrim.val += this->stackGrowth;
+		a->exprPrim.val += this->stackGrowth;
 		
 	}
 }

src/ast.h

@@ -123,6 +123,9 @@ typedef struct {
 	ASTExpr;
 	
 	int val;
+	
+	// If true, increase this literal during stack growths
+	bool stackGrowth;
 } ASTExprPrimitive;
 
 typedef struct {

src/x86/cg.c

@@ -568,6 +568,7 @@ static void callee_saved_visitor(AST **nptr, AST *stmt, AST *stmtPrev, AST *chun
 			offset->nodeKind = AST_EXPR_PRIMITIVE;
 			offset->type = primitive_parse("u32");
 			offset->val = this->calleeOffsets[i];
+			offset->stackGrowth = true;
 			
 			ASTExprBinaryOp *sum = calloc(1, sizeof(*sum));
 			sum->nodeKind = AST_EXPR_BINARY_OP;
@@ -618,6 +619,7 @@ static void callee_saved_visitor(AST **nptr, AST *stmt, AST *stmtPrev, AST *chun
 			offset->nodeKind = AST_EXPR_PRIMITIVE;
 			offset->type = primitive_parse("u32");
 			offset->val = this->calleeOffsets[i];
+			offset->stackGrowth = true;
 			
 			ASTExprBinaryOp *sum = calloc(1, sizeof(*sum));
 			sum->nodeKind = AST_EXPR_BINARY_OP;

src/x86/dumberdowner.c

@@ -221,6 +221,9 @@ static void dumben_visitor(AST **nptr, AST *stmt, AST *stmtPrev, AST *chu, AST *
 					if(is_xop(call->args[i]) == XOP_NOT_XOP) {
 						call->args[i] = xopify(tlc, chu, stmtPrev, s, call->args[i]);
 						this->effective = 1;
+						
+						// Xopify one argument at a time otherwise stmtPrev becomes incorrect
+						break;
 					}
 				}
 			} else if(s->stmtAssign.to && s->stmtAssign.to->nodeKind == AST_EXPR_UNARY_OP && s->stmtAssign.to->exprUnOp.operator == UNOP_NEGATE && !ast_expression_equal(s->stmtAssign.what, s->stmtAssign.to->exprUnOp.operand)) {
@@ -373,6 +376,7 @@ static void pre_dumb_visitor(AST **nptr, AST *stmt, AST *stmtPrev, AST *chunk, A
 				offset->nodeKind = AST_EXPR_PRIMITIVE;
 				offset->type = primitive_parse("u32");
 				offset->val = 4 + i * 4;
+				offset->stackGrowth = true;
 				
 				ASTExprBinaryOp *sum = calloc(1, sizeof(*sum));
 				sum->nodeKind = AST_EXPR_BINARY_OP;