fix the quotient returned by sdivrem() for the case when LHS is negative and RHS is positive
based on a patch by Preston Briggs, with some modifications
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157231 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/unittests/ADT/APIntTest.cpp b/unittests/ADT/APIntTest.cpp
index 89b8aa9..49d7e70 100644
--- a/unittests/ADT/APIntTest.cpp
+++ b/unittests/ADT/APIntTest.cpp
@@ -171,6 +171,34 @@
EXPECT_EQ(zero, neg_one.srem(one));
EXPECT_EQ(zero, neg_one.urem(one));
EXPECT_EQ(zero, one.srem(neg_one));
+
+ // sdivrem
+ {
+ APInt q(8, 0);
+ APInt r(8, 0);
+ APInt one(8, 1);
+ APInt two(8, 2);
+ APInt nine(8, 9);
+ APInt four(8, 4);
+
+ EXPECT_EQ(nine.srem(two), one);
+ EXPECT_EQ(nine.srem(-two), one);
+ EXPECT_EQ((-nine).srem(two), -one);
+ EXPECT_EQ((-nine).srem(-two), -one);
+
+ APInt::sdivrem(nine, two, q, r);
+ EXPECT_EQ(four, q);
+ EXPECT_EQ(one, r);
+ APInt::sdivrem(-nine, two, q, r);
+ EXPECT_EQ(-four, q);
+ EXPECT_EQ(-one, r);
+ APInt::sdivrem(nine, -two, q, r);
+ EXPECT_EQ(-four, q);
+ EXPECT_EQ(one, r);
+ APInt::sdivrem(-nine, -two, q, r);
+ EXPECT_EQ(four, q);
+ EXPECT_EQ(-one, r);
+ }
}
TEST(APIntTest, fromString) {