2 files changed, 61 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/MIR/X86/undefined-register-class.mir b/llvm/test/CodeGen/MIR/X86/undefined-register-class.mir
new file mode 100644
index 00000000000..a14d2303a7d
--- /dev/null
+++ b/llvm/test/CodeGen/MIR/X86/undefined-register-class.mir
@@ -0,0 +1,26 @@
+# RUN: not llc -march=x86-64 -start-after machine-sink -stop-after machine-sink -o /dev/null %s 2>&1 | FileCheck %s
+# This test ensures that the MIR parser reports an error when it encounters an
+# unknown register class.
+
+--- |
+
+  define i32 @test(i32 %a) {
+  entry:
+    ret i32 %a
+  }
+
+...
+---
+name:            test
+isSSA:           true
+tracksRegLiveness: true
+registers:
+  # CHECK: [[@LINE+1]]:20: use of undefined register class 'gr3200'
+  - {id: 0, class: 'gr3200'}
+body:
+  - id:          0
+    name:        entry
+    instructions:
+      - 'RETQ %eax'
+...
+
diff --git a/llvm/test/CodeGen/MIR/X86/virtual-registers.mir b/llvm/test/CodeGen/MIR/X86/virtual-registers.mir
new file mode 100644
index 00000000000..154c71335bb
--- /dev/null
+++ b/llvm/test/CodeGen/MIR/X86/virtual-registers.mir
@@ -0,0 +1,35 @@
+# RUN: llc -march=x86-64 -start-after machine-sink -stop-after machine-sink -o /dev/null %s | FileCheck %s
+# This test ensures that the MIR parser parses virtual register definitions
+# correctly.
+
+--- |
+
+  define i32 @bar(i32 %a) {
+  entry:
+    %0 = icmp sle i32 %a, 10
+    br i1 %0, label %less, label %exit
+
+  less:
+    ret i32 0
+
+  exit:
+    ret i32 %a
+  }
+
+...
+---
+name:            bar
+isSSA:           true
+tracksRegLiveness: true
+# CHECK:      registers:
+# CHECK-NEXT:   - { id: 0, class: gr32 }
+# CHECK-NEXT:   - { id: 1, class: gr32 }
+# CHECK-NEXT:   - { id: 2, class: gr32 }
+registers:
+  - { id: 0, class: gr32 }
+  - { id: 1, class: gr32 }
+  - { id: 2, class: gr32 }
+body:
+  - id: 0
+...
+