From: Tobias Grosser <tobias@grosser.es>
Date: Tue, 17 Feb 2015 07:39:25 +0000 (+0000)
Subject: Update isl to 0ae2b02 "isl_seq_combine: optimize for common case"
X-Git-Tag: llvmorg-3.7.0-rc1~11837
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=af4535451ffdcbd47350daa52f02b2d0683ce22a;p=platform%2Fupstream%2Fllvm.git

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
--- 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]);