gesamt: kleinere spielerein bezueglich stack

diff --git a/gesamt/code.bfe b/gesamt/code.bfe
index 33979ba71c1aed73be25d9e7cb0e8298e453f5bd..11c67347e8d92fcad8aae5667f03ca14789e1ce7 100644 (file)
--- a/gesamt/code.bfe
+++ b/gesamt/code.bfe
@@ -187,12 +187,17 @@ void assign_var(struct treenode *bnode)
        printf("\tsub $%d, %%%s\n", KIDKID_VAL(0,1), KID_REG(1));
 }
 
+/* ... dirty */
+static short sc[8] = {0};
 void make_call(struct treenode *bnode)
 {
        int j;
        printf("\t//params pushen\n");
        for(j = 0; j < bnode->soffset; j++) {
-               printf("\txchg %%%s, %d(%%rsp)\n", param_reg(j), j*8);
+               if(sc[j] == 1)
+                       printf("\txchg %%%s, %d(%%rsp)\n", param_reg(j), j*8);
+               else if (sc[j] == 0)
+                       printf("\tpushq %%%s\n", param_reg(j));
        }
        printf("\t//vars pushen\n");
        for(j = bnode->soffset; j < bnode->soffset + bnode->vars; j++) {
@@ -222,14 +227,24 @@ void make_call(struct treenode *bnode)
        }
 
        /* params poppen */
+       for(j = bnode->soffset - 1; j >= 0; j--) {
+               if(sc[j] == 0)
+                       printf("\tpopq %%%s\n", param_reg(j));
+       }
        for(j = 0; j < bnode->soffset; j++) {
-               printf("\tpopq %%%s\n", param_reg(j));
+               if(sc[j] > 0)
+                       printf("\tpopq %%%s\n", param_reg(j));
        }
+
+       /* clear stack_control array */
+       for(j = 0; j < sizeof sc / sizeof sc[0]; j++)
+               sc[j] = 0;
 }
 
 void prep_arg(struct treenode *bnode, int moveit)
 {
        printf("\t//args-nr-> %i (%%%s) [moveit= %i]\n", bnode->soffset, param_reg(bnode->soffset), moveit);
+       sc[bnode->soffset] = 1;
        if(moveit) { /* expr */
                if((BN_REG == (char *) NULL) || (bnode->kids[1] != TREENULL && bnode->kids[1]->op == O_ID && bnode->kids[1]->kids[0] == TREENULL && bnode->kids[1]->kids[1] == TREENULL)) {
                        if(bnode->kids[1]->name != (char *) NULL && strcmp(bnode->kids[1]->name,"this")!=0) {
@@ -237,6 +252,7 @@ void prep_arg(struct treenode *bnode, int moveit)
                                printf("\tpushq %%%s\n", KID_REG(1));
                        } else {
                                printf("\tpushq %%%s\n", param_reg(bnode->soffset));
+                               sc[bnode->soffset] = 2;
                        }
                } else {
                        printf("\tpushq %%%s\n", BN_REG);