(expand_increment): If pre-incrementing a promoted

variable, don't adjust OP0 since the result won't be used.

From-SVN: r7656

gcc/longlong.h

@@ -590,7 +590,7 @@
   (r) = __xx.__i.__l; (q) = __xx.__i.__h; })
 #endif /* __ns32000__ */
 
-#if (defined (__powerpc__) || defined (___IBMR2__)) && W_TYPE_SIZE == 32
+#if (defined (_ARCH_PPC) || defined (_IBMR2)) && W_TYPE_SIZE == 32
 #define add_ssaaaa(sh, sl, ah, al, bh, bl) \
   do {									\
     if (__builtin_constant_p (bh) && (bh) == 0)				\
@@ -659,7 +659,7 @@
   __asm__ ("{cntlz|cntlzw} %0,%1"					\
 	   : "=r" ((USItype)(count))					\
 	   : "r" ((USItype)(x)))
-#if defined (__powerpc__)
+#if defined (_ARCH_PPC)
 #define umul_ppmm(ph, pl, m0, m1) \
   do {									\
     USItype __m0 = (m0), __m1 = (m1);					\