Imported Upstream version 6.10.0.49

Former-commit-id: 1d6753294b2993e1fbf92de9366bb9544db4189b

external/llvm-project/llvm/test/CodeGen/X86/mbp-false-cfg-break.ll

@@ -0,0 +1,39 @@
+; RUN: llc < %s -mtriple=x86_64-- | FileCheck %s
+
+define void @test(i1 %cnd) !prof !{!"function_entry_count", i64 1024} {
+; CHECK-LABEL: @test
+; Using the assembly comments to indicate block order..
+; CHECK: # %loop
+; CHECK: # %backedge
+; CHECK: # %exit
+; CHECK: # %rare
+; CHECK: # %rare.1
+
+  br i1 undef, label %rare.1, label %preheader, !prof !{!"branch_weights", i32 0, i32 1000}
+rare.1:
+  call void @foo()
+  br label %preheader
+
+preheader:
+  br label %loop
+
+loop:
+  %iv = phi i32 [0, %preheader], [%iv.next, %backedge]
+  call void @foo()
+  br i1 %cnd, label %backedge, label %rare, !prof !{!"branch_weights", i32 1000000, i32 1}
+rare:
+  call void @foo()
+  br label %backedge
+backedge:
+  call void @foo()
+  %iv.next = add i32 %iv, 1
+  %cmp = icmp eq i32 %iv.next, 200
+  br i1 %cmp, label %loop, label %exit, !prof !{!"branch_weights", i32 1000, i32 1}
+
+exit:
+  ret void
+
+}
+
+
+declare void @foo()