1 files changed, 48 insertions, 0 deletions
diff --git a/test/MC/AMDGPU/invalid-instructions-spellcheck.s b/test/MC/AMDGPU/invalid-instructions-spellcheck.s
new file mode 100644
index 000000000000..f4198f10f4b8
--- /dev/null
+++ b/test/MC/AMDGPU/invalid-instructions-spellcheck.s
@@ -0,0 +1,48 @@
+# RUN: not llvm-mc -triple amdgcn < %s 2>&1 | FileCheck %s
+
+# This tests the mnemonic spell checker.
+
+# First check what happens when an instruction is omitted:
+
+v2, v4, v6
+
+# CHECK:      unknown token in expression
+# CHECK-NEXT: v2, v4, v6
+# CHECK-NEXT:   ^
+
+# CHECK:      error: not a valid operand.
+# CHECK-NEXT: v2, v4, v6
+# CHECK-NEXT:     ^
+
+# We don't want to see a suggestion here; the edit distance is too large to
+# give sensible suggestions:
+
+aaaaaaaaaaaaaaa v1, v2, v3
+
+# CHECK:      error: invalid instruction
+# CHECK-NEXT: aaaaaaaaaaaaaaa v1, v2, v3
+# CHECK-NEXT: ^
+
+# Check that we get one suggestion: 'dsc_write_src2_b64' is 1 edit away, i.e. an deletion.
+
+dsc_write_src2_b64 v1, v2, v3
+
+# CHECK:      error: invalid instruction, did you mean: ds_write_src2_b64?
+# CHECK-NEXT: dsc_write_src2_b64 v1, v2, v3
+# CHECK-NEXT: ^
+
+# Check edit distance 1 and 2, just insertions:
+
+s_mov_b v1, v2
+
+# CHECK:      error: invalid instruction, did you mean: s_mov_b32, s_mov_b64?
+# CHECK-NEXT: s_mov_b v1, v2
+# CHECK-NEXT: ^
+
+# Check an instruction that is 2 edits away, and also has a lot of candidates:
+
+s_load_dwordx v1, v2, v3
+
+# CHECK:      error: invalid instruction, did you mean: s_load_dword, s_load_dwordx16, s_load_dwordx2, s_load_dwordx4, s_load_dwordx8?
+# CHECK-NEXT: s_load_dwordx v1, v2, v3
+# CHECK-NEXT: ^