diff --git a/mlir/include/mlir/Support/MathExtras.h b/mlir/include/mlir/Support/MathExtras.h
--- a/mlir/include/mlir/Support/MathExtras.h
+++ b/mlir/include/mlir/Support/MathExtras.h
@@ -24,7 +24,8 @@
   assert(rhs != 0);
   // C/C++'s integer division rounds towards 0.
   int64_t x = (rhs > 0) ? -1 : 1;
-  return (lhs * rhs > 0) ? ((lhs + x) / rhs) + 1 : -(-lhs / rhs);
+  return (lhs > 0 && rhs > 0) || (lhs < 0 && rhs < 0) ? ((lhs + x) / rhs) + 1
+                                                      : -(-lhs / rhs);
 }
 
 /// Returns the result of MLIR's floordiv operation on constants. The RHS is
@@ -33,7 +34,8 @@
   assert(rhs != 0);
   // C/C++'s integer division rounds towards 0.
   int64_t x = (rhs < 0) ? 1 : -1;
-  return (lhs * rhs < 0) ? -((-lhs + x) / rhs) - 1 : lhs / rhs;
+  return (lhs > 0 && rhs < 0) || (lhs < 0 && rhs > 0) ? -((-lhs + x) / rhs) - 1
+                                                      : lhs / rhs;
 }
 
 /// Returns MLIR's mod operation on constants. MLIR's mod operation yields the
diff --git a/mlir/unittests/Support/MathExtrasTest.cpp b/mlir/unittests/Support/MathExtrasTest.cpp
--- a/mlir/unittests/Support/MathExtrasTest.cpp
+++ b/mlir/unittests/Support/MathExtrasTest.cpp
@@ -17,6 +17,7 @@
   EXPECT_THAT(ceilDiv(14, -3), Eq(-4));
   EXPECT_THAT(ceilDiv(-14, -3), Eq(5));
   EXPECT_THAT(ceilDiv(-14, 3), Eq(-4));
+  EXPECT_THAT(ceilDiv(1ll << 60, 1ll << 60), Eq(1));
 }
 
 TEST(MathExtrasTest, FloorDivTest) {
@@ -24,4 +25,5 @@
   EXPECT_THAT(floorDiv(14, -3), Eq(-5));
   EXPECT_THAT(floorDiv(-14, -3), Eq(4));
   EXPECT_THAT(floorDiv(-14, 3), Eq(-5));
+  EXPECT_THAT(floorDiv(1ll << 60, 1ll << 60), Eq(1));
 }