compiler_rt: fix rare case in udivei4

Unsigned integers are never less than zero, and so zig
helpfully deleted the entire case. :D

Closes #14816

1 files changed, 20 insertions, 0 deletions

diff --git a/test/behavior/int_div.zig b/test/behavior/int_div.zig
index 6ae794d377..c8b600ba03 100644
--- a/test/behavior/int_div.zig
+++ b/test/behavior/int_div.zig
@@ -91,3 +91,23 @@ fn mod(comptime T: type, a: T, b: T) T {
 fn rem(comptime T: type, a: T, b: T) T {
     return @rem(a, b);
 }
+
+test "large integer division" {
+    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
+    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
+    if (builtin.zig_backend == .stage2_c) return error.SkipZigTest;
+    if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest;
+    if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest;
+    if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest;
+
+    {
+        var numerator: u256 = 99999999999999999997315645440;
+        var divisor: u256 = 10000000000000000000000000000;
+        try expect(numerator / divisor == 9);
+    }
+    {
+        var numerator: u256 = 99999999999999999999000000000000000000000;
+        var divisor: u256 = 10000000000000000000000000000000000000000;
+        try expect(numerator / divisor == 9);
+    }
+}