added tests as prepared by oliver

test/ref/spill.c

@@ -0,0 +1,55 @@
+/*
+  !!DESCRIPTION!! register spilling
+  !!ORIGIN!!      LCC 4.1 Testsuite
+  !!LICENCE!!     own, freely distributeable for non-profit. read CPYRIGHT.LCC
+*/
+
+#include <stdio.h>
+
+int main(void)
+{
+    printf("disassemble this program to check the generated code.\n");
+    return 0;
+}
+
+#ifdef NO_EMPTY_FUNC_ARGS
+        f(i){return i+i;}
+        f2(i){return f(i)+(i?f(i):1);}
+        f3(int i,int *p){
+        register r1=0,r2=0,r3=0,r4=0,r5=0,r6=0,r7=0,r8=0,r9=0,r10=0;
+                *p++=i?f(i):0;
+        }
+#else
+        f(i){i=f()+f();}
+        f2(i){i=f()+(i?f():1);}
+        f3(int i,int *p){
+        register r1=0,r2=0,r3=0,r4=0,r5=0,r6=0,r7=0,r8=0,r9=0,r10=0;
+                *p++=i?f():0;
+        }
+#endif
+
+#ifdef NO_FLOATS
+        signed a[10],b[10];
+#else
+        double a[10],b[10];
+#endif
+
+int i;
+
+f4(){
+register r6=0,r7=0,r8=0,r9=0,r10=0,r11=0;
+        i=a[i]+b[i] && i && a[i]-b[i];
+}
+/* f4 causes parent to spill child on vax when odd double regs are enabled */
+
+int j, k, m, n;
+#ifdef NO_FLOATS
+        signed *A, *B, x;
+#else
+        double *A, *B, x;
+#endif
+
+f5(){
+	x=A[k*m]*A[j*m]+B[k*n]*B[j*n];
+	x=A[k*m]*B[j*n]-B[k*n]*A[j*m];
+}