Update isl to 0ae2b02 "isl_seq_combine: optimize for common case"

This is just a single commit that includes a performance optimization that
should improve dependence analysis time. Our performance bots should measure
this difference.

llvm-svn: 229476

diff --git a/polly/lib/External/isl/isl_seq.c b/polly/lib/External/isl/isl_seq.c
index fbbc26f..2159464 100644 (file)
--- a/polly/lib/External/isl/isl_seq.c
+++ b/polly/lib/External/isl/isl_seq.c
@@ -107,6 +107,14 @@ void isl_seq_combine(isl_int *dst, isl_int m1, isl_int *src1,
        int i;
        isl_int tmp;
 
+       if (dst == src1 && isl_int_is_one(m1)) {
+               if (isl_int_is_zero(m2))
+                       return;
+               for (i = 0; i < len; ++i)
+                       isl_int_addmul(src1[i], m2, src2[i]);
+               return;
+       }
+
        isl_int_init(tmp);
        for (i = 0; i < len; ++i) {
                isl_int_mul(tmp, m1, src1[i]);