Re: [Tinycc-devel] Bug in tcc

[Daniel Glöckner]

Patch is attached.

save_reg tried to save a floating point value from the value stack
because its r2 contained 0 (== TREG_EAX), but r2 is valid only for
VT_LLONG.

  Daniel

diff -rud a/tcc.c b/tcc.c
--- a/tcc.c     Sun Sep 24 18:34:55 2006
+++ b/tcc.c     Sun Sep 24 18:35:16 2006
@@ -4585,7 +4585,8 @@
     l = 0;
     for(p=vstack;p<=vtop;p++) {
         if ((p->r & VT_VALMASK) == r ||
-            (p->r2 & VT_VALMASK) == r) {
+           ((p->type.t & VT_BTYPE) == VT_LLONG &&
+            (p->r2 & VT_VALMASK) == r)) {
             /* must save value on stack if not already done */
             if (!saved) {
                 /* NOTE: must reload 'r' because r might be equal to r2 */