Imported Upstream version 6.10.0.49

Former-commit-id: 1d6753294b2993e1fbf92de9366bb9544db4189b

external/llvm-project/llvm/test/CodeGen/MIR/X86/undefined-ir-block-slot-in-blockaddress.mir

@@ -0,0 +1,29 @@
+# RUN: not llc -march=x86-64 -run-pass none -o /dev/null %s 2>&1 | FileCheck %s
+
+--- |
+
+  @addr = global i8* null
+
+  define void @test() {
+  entry:
+    store volatile i8* blockaddress(@test, %0), i8** @addr
+    %val = load volatile i8*, i8** @addr
+    indirectbr i8* %val, [label %0]
+
+    ret void
+  }
+
+...
+---
+name:            test
+body: |
+  bb.0.entry:
+    successors: %bb.1
+    ; CHECK: [[@LINE+1]]:51: use of undefined IR block '%ir-block.1'
+    %rax = LEA64r %rip, 1, _, blockaddress(@test, %ir-block.1), _
+    MOV64mr %rip, 1, _, @addr, _, killed %rax
+    JMP64m %rip, 1, _, @addr, _
+
+  bb.1 (address-taken):
+    RETQ
+...