Imported Upstream version 6.10.0.49

Former-commit-id: 1d6753294b2993e1fbf92de9366bb9544db4189b

external/llvm-project/llvm/test/CodeGen/Thumb2/2009-11-01-CopyReg2RegBug.ll

@@ -0,0 +1,29 @@
+; RUN: llc < %s -mtriple=thumbv7-apple-darwin -relocation-model=pic -disable-fp-elim -mcpu=cortex-a8
+
+define void @get_initial_mb16x16_cost() nounwind {
+entry:
+  br i1 undef, label %bb4, label %bb1
+
+bb1:                                              ; preds = %entry
+  br label %bb7
+
+bb4:                                              ; preds = %entry
+  br i1 undef, label %bb7.thread, label %bb5
+
+bb5:                                              ; preds = %bb4
+  br label %bb7
+
+bb7.thread:                                       ; preds = %bb4
+  br label %bb8
+
+bb7:                                              ; preds = %bb5, %bb1
+  br i1 undef, label %bb8, label %bb10
+
+bb8:                                              ; preds = %bb7, %bb7.thread
+  %0 = phi double [ 5.120000e+02, %bb7.thread ], [ undef, %bb7 ] ; <double> [#uses=1]
+  %1 = fdiv double %0, undef                      ; <double> [#uses=0]
+  unreachable
+
+bb10:                                             ; preds = %bb7
+  ret void
+}