diff --git a/src/test/run-make/repr128-dwarf/Makefile b/src/test/run-make/repr128-dwarf/Makefile
new file mode 100644
index 00000000000..a840e3ee6d8
--- /dev/null
+++ b/src/test/run-make/repr128-dwarf/Makefile
@@ -0,0 +1,16 @@
+# ignore-windows
+# This test should be replaced with one in src/test/debuginfo once GDB or LLDB support 128-bit
+# enums.
+
+include ../../run-make-fulldeps/tools.mk
+
+all:
+	$(RUSTC) -Cdebuginfo=2 lib.rs -o $(TMPDIR)/repr128.rlib
+	"$(LLVM_BIN_DIR)"/llvm-dwarfdump -n U128A $(TMPDIR)/repr128.rlib | $(CGREP) "DW_AT_const_value	(<0x10> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 )"
+	"$(LLVM_BIN_DIR)"/llvm-dwarfdump -n U128B $(TMPDIR)/repr128.rlib | $(CGREP) "DW_AT_const_value	(<0x10> 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 )"
+	"$(LLVM_BIN_DIR)"/llvm-dwarfdump -n U128C $(TMPDIR)/repr128.rlib | $(CGREP) "DW_AT_const_value	(<0x10> 00 00 00 00 00 00 00 00 01 00 00 00 00 00 00 00 )"
+	"$(LLVM_BIN_DIR)"/llvm-dwarfdump -n U128D $(TMPDIR)/repr128.rlib | $(CGREP) "DW_AT_const_value	(<0x10> ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff )"
+	"$(LLVM_BIN_DIR)"/llvm-dwarfdump -n I128A $(TMPDIR)/repr128.rlib | $(CGREP) "DW_AT_const_value	(<0x10> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 )"
+	"$(LLVM_BIN_DIR)"/llvm-dwarfdump -n I128B $(TMPDIR)/repr128.rlib | $(CGREP) "DW_AT_const_value	(<0x10> ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff )"
+	"$(LLVM_BIN_DIR)"/llvm-dwarfdump -n I128C $(TMPDIR)/repr128.rlib | $(CGREP) "DW_AT_const_value	(<0x10> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 80 )"
+	"$(LLVM_BIN_DIR)"/llvm-dwarfdump -n I128D $(TMPDIR)/repr128.rlib | $(CGREP) "DW_AT_const_value	(<0x10> ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff 7f )"
diff --git a/src/test/run-make/repr128-dwarf/lib.rs b/src/test/run-make/repr128-dwarf/lib.rs
new file mode 100644
index 00000000000..63675441d4b
--- /dev/null
+++ b/src/test/run-make/repr128-dwarf/lib.rs
@@ -0,0 +1,23 @@
+#![crate_type = "lib"]
+#![feature(repr128)]
+
+// Use .to_le() to ensure that the bytes are in the same order on both little- and big-endian
+// platforms.
+
+#[repr(u128)]
+pub enum U128Enum {
+    U128A = 0_u128.to_le(),
+    U128B = 1_u128.to_le(),
+    U128C = (u64::MAX as u128 + 1).to_le(),
+    U128D = u128::MAX.to_le(),
+}
+
+#[repr(i128)]
+pub enum I128Enum {
+    I128A = 0_i128.to_le(),
+    I128B = (-1_i128).to_le(),
+    I128C = i128::MIN.to_le(),
+    I128D = i128::MAX.to_le(),
+}
+
+pub fn f(_: U128Enum, _: I128Enum) {}