Add a test for #2197

Author: topecongiro

tests/target/issue-2197.rs

@@ -0,0 +1,12 @@
+// rustfmt-max_width: 79
+// rustfmt-wrap_comments: true
+// rustfmt-error_on_line_overflow: false
+
+/// ```rust
+/// unsafe fn sum_sse2(x: i32x4) -> i32 {
+///     let x = vendor::_mm_add_epi32(x, vendor::_mm_srli_si128(x.into(), 8).into());
+///     let x = vendor::_mm_add_epi32(x, vendor::_mm_srli_si128(x.into(), 4).into());
+///     vendor::_mm_cvtsi128_si32(x)
+/// }
+/// ```
+fn foo() {}