PR 22077.
Oked by Roger Sayle.
From-SVN: r101211
+2005-06-20 Roger Sayle <roger@eyesopen.com>
+2005-06-20 Fariborz Jahanian <fjahanian@apple.com>
+
+ * combine.c (simplify_set): Simplify setting of CC register
+ by removing redundant compare with 0 on RHS.
+
2005-06-20 Jan Beulich <jbeulich@novell.com>
* config/i386/netware-libgcc.def: Update copyright.
SUBST (SET_SRC (x), gen_rtx_COMPARE (compare_mode, op0, op1));
src = SET_SRC (x);
}
+ else if (GET_MODE (op0) == compare_mode && op1 == const0_rtx)
+ {
+ SUBST(SET_SRC (x), op0);
+ src = SET_SRC (x);
+ }
else
{
/* Otherwise, update the COMPARE if needed. */
--- /dev/null
+/* { dg-do compile { target powerpc-*-* } } */
+/* { dg-options "-O3 -maltivec" } */
+/* { dg-final { scan-assembler-not "mfcr" } } */
+
+#include <altivec.h>
+
+int foo(vector float x, vector float y) {
+ if (vec_all_eq(x,y)) return 3245;
+ else return 12;
+}