From 2c41106ae4fd8e8b01f3e9c4ffe58f11263b318f Mon Sep 17 00:00:00 2001
From: Bernhard Urban <lewurm@gmail.com>
Date: Sun, 6 Jun 2010 21:14:43 +0200
Subject: [PATCH] gesamt: bugfix bei mehreren methodenaufrufen in einer Expr

---
 gesamt/chelper.c |  4 ++--
 gesamt/code.bfe  | 18 +++++++++++++++++-
 2 files changed, 19 insertions(+), 3 deletions(-)

diff --git a/gesamt/chelper.c b/gesamt/chelper.c
index 448b07b..25362dd 100644
--- a/gesamt/chelper.c
+++ b/gesamt/chelper.c
@@ -25,8 +25,8 @@ void func_header(char *s, int vars, int parms, int call)
 	need_stack = (vars || parms) && call;
 	if(need_stack) {
 		printf("\tpushq %%rbp\n"
-				"\tmovq %%rsp, %%rbp\n",
-				"\tsubq $%d, %%rsp\n", 8*(vars+parms));
+				"\tmovq %%rsp, %%rbp\n"
+				"\tsubq $%d, %%rsp\n", 8*(vars+parms+2 /* fuer rax und r10*/));
 	}
 }
 
diff --git a/gesamt/code.bfe b/gesamt/code.bfe
index 8e3dfde..9e85ee1 100644
--- a/gesamt/code.bfe
+++ b/gesamt/code.bfe
@@ -164,7 +164,9 @@ void gen_subspecial(struct treenode *bnode, short e)
 	KIDKIDREG2PARM(1,0);
 
 	if(e) {
-		printf("\tsubq $%d, %%%s\n", KIDKID_VAL(1,0), BN_REG);
+		if(KIDKID_VAL(1,0) != 0) {
+			printf("\tsubq $%d, %%%s\n", KIDKID_VAL(1,0), BN_REG);
+		}
 	} else {
 		printf("\tsubq %%%s, %%%s\n", KIDKID_REG(1,0), BN_REG);
 	}
@@ -189,7 +191,21 @@ void make_call(struct treenode *bnode)
 	for(j = bnode->paramges; j < bnode->paramges + bnode->vars; j++) {
 		printf("\tpushq %%%s\n", param_reg(j));
 	}
+	/* TODO: schoener machen... */
+	if(strcmp(BN_REG, "rax")!=0) {
+		printf("\tpushq %%rax\n");
+		if(strcmp(BN_REG, "r10")!=0) {
+			printf("\tpushq %%r10\n");
+		}
+	}
 	printf("\tcall %s\n", bnode->name);
+	if(strcmp(BN_REG, "rax")!=0) {
+		move("rax", BN_REG);
+		if(strcmp(BN_REG, "r10")!=0) {
+			printf("\tpopq %%r10\n");
+		}
+		printf("\tpopq %%rax\n");
+	}
 
 	/* vars poppen */
 	for(j = bnode->paramges + bnode->vars - 1; j >= bnode->paramges; j--) {
-- 
2.25.1