Test for solaris cc bug with bit-fields. With "cc -fast" (or, rather, "cc -xalias_level=basic -xO3", implied by "cc -fast") solaris cc compiles incorrect code for bit-field accesses, notably not rechecking data after functions calls in some situations. Using "-xalias_level=any" resolves the problem (as well as using any non-bit-field type). Tested cc version is "Sun C 5.9 SunOS_i386 2007/05/03" (Sun Studio 12).

new file mode 100644
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,21 @@
+
+FAST=	-fast
+#FAST=	-xalias_level=basic -xO3
+
+# no bug seen with:
+#FAST=	-fast -xalias_level=any
+
+test: t
+	./t
+
+clean:
+	rm t *.o
+
+t: t.o t2.o
+	cc -o t t.o t2.o ${FAST}
+
+t.o: t.c t.h
+	cc -c t.c ${FAST}
+
+t2.o: t2.c t.h
+	cc -c t2.c ${FAST}