--- /dev/null
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt -S -codegenprepare -mtriple=aarch64-none-linux-gnu < %s | FileCheck %s
+
+@_MergedGlobals = external dso_local global <{ i32, i32 }>, align 4
+
+define dso_local i32 @f(i1 %a, i8 %b) local_unnamed_addr {
+; CHECK-LABEL: @f(
+; CHECK-NEXT: br label [[TMP6:%.*]]
+; CHECK: 1:
+; CHECK-NEXT: br i1 [[A:%.*]], label [[TMP2:%.*]], label [[TMP6]]
+; CHECK: 2:
+; CHECK-NEXT: [[TMP3:%.*]] = phi i32* [ getelementptr inbounds (<{ i32, i32 }>, <{ i32, i32 }>* @_MergedGlobals, i32 0, i32 1), [[TMP1:%.*]] ], [ [[TMP16:%.*]], [[TMP14:%.*]] ]
+; CHECK-NEXT: [[TMP4:%.*]] = phi i32* [ getelementptr inbounds (<{ i32, i32 }>, <{ i32, i32 }>* @_MergedGlobals, i32 0, i32 1), [[TMP1]] ], [ [[TMP15:%.*]], [[TMP14]] ]
+; CHECK-NEXT: ret i32 0
+; CHECK: 5:
+; CHECK-NEXT: br label [[TMP6]]
+; CHECK: 6:
+; CHECK-NEXT: [[TMP7:%.*]] = phi i32* [ getelementptr inbounds (<{ i32, i32 }>, <{ i32, i32 }>* @_MergedGlobals, i32 0, i32 0), [[TMP0:%.*]] ], [ [[TMP3]], [[TMP5:%.*]] ], [ getelementptr inbounds (<{ i32, i32 }>, <{ i32, i32 }>* @_MergedGlobals, i32 0, i32 1), [[TMP1]] ]
+; CHECK-NEXT: [[TMP8:%.*]] = phi i32* [ getelementptr inbounds (<{ i32, i32 }>, <{ i32, i32 }>* @_MergedGlobals, i32 0, i32 0), [[TMP0]] ], [ [[TMP4]], [[TMP5]] ], [ getelementptr inbounds (<{ i32, i32 }>, <{ i32, i32 }>* @_MergedGlobals, i32 0, i32 1), [[TMP1]] ]
+; CHECK-NEXT: br label [[TMP9:%.*]]
+; CHECK: 9:
+; CHECK-NEXT: [[TMP10:%.*]] = phi i32* [ [[TMP16]], [[TMP14]] ], [ [[TMP7]], [[TMP6]] ]
+; CHECK-NEXT: [[TMP11:%.*]] = phi i32* [ [[TMP16]], [[TMP14]] ], [ [[TMP8]], [[TMP6]] ]
+; CHECK-NEXT: [[TMP12:%.*]] = phi i32* [ [[TMP15]], [[TMP14]] ], [ [[TMP8]], [[TMP6]] ]
+; CHECK-NEXT: br i1 [[A]], label [[TMP14]], label [[TMP13:%.*]]
+; CHECK: 13:
+; CHECK-NEXT: store i32 5, i32* [[TMP11]], align 4
+; CHECK-NEXT: br label [[TMP14]]
+; CHECK: 14:
+; CHECK-NEXT: [[TMP15]] = phi i32* [ [[TMP12]], [[TMP13]] ], [ [[TMP10]], [[TMP9]] ]
+; CHECK-NEXT: [[TMP16]] = phi i32* [ [[TMP11]], [[TMP13]] ], [ [[TMP10]], [[TMP9]] ]
+; CHECK-NEXT: br i1 [[A]], label [[TMP2]], label [[TMP9]]
+;
+ br label %11
+
+1: ; No predecessors!
+ br i1 %a, label %2, label %10
+
+2: ; preds = %22, %1
+ %3 = phi i32* [ getelementptr inbounds (<{ i32, i32 }>, <{ i32, i32 }>* @_MergedGlobals, i32 0, i32 1), %1 ], [ %21, %22 ]
+ %4 = phi i32* [ getelementptr inbounds (<{ i32, i32 }>, <{ i32, i32 }>* @_MergedGlobals, i32 0, i32 1), %1 ], [ %20, %22 ]
+ ret i32 0
+
+5: ; No predecessors!
+ %6 = icmp ugt i8 %b, 50
+ br label %7
+
+7: ; preds = %10, %5
+ %8 = phi i32* [ %3, %5 ], [ getelementptr inbounds (<{ i32, i32 }>, <{ i32, i32 }>* @_MergedGlobals, i32 0, i32 1), %10 ]
+ %9 = phi i32* [ %4, %5 ], [ getelementptr inbounds (<{ i32, i32 }>, <{ i32, i32 }>* @_MergedGlobals, i32 0, i32 1), %10 ]
+ br label %11
+
+10: ; preds = %1
+ br label %7
+
+11: ; preds = %7, %0
+ %12 = phi i32* [ getelementptr inbounds (<{ i32, i32 }>, <{ i32, i32 }>* @_MergedGlobals, i32 0, i32 0), %0 ], [ %8, %7 ]
+ %13 = phi i32* [ getelementptr inbounds (<{ i32, i32 }>, <{ i32, i32 }>* @_MergedGlobals, i32 0, i32 0), %0 ], [ %9, %7 ]
+ br label %14
+
+14: ; preds = %19, %11
+ %15 = phi i32* [ %21, %19 ], [ %12, %11 ]
+ %16 = phi i32* [ %21, %19 ], [ %13, %11 ]
+ %17 = phi i32* [ %20, %19 ], [ %13, %11 ]
+ br i1 %a, label %19, label %18
+
+18: ; preds = %14
+ store i32 5, i32* %16, align 4
+ br label %19
+
+19: ; preds = %18, %14
+ %20 = phi i32* [ %17, %18 ], [ %15, %14 ]
+ %21 = phi i32* [ %16, %18 ], [ %15, %14 ]
+ br i1 %a, label %22, label %14
+
+22: ; preds = %19
+ br label %2
+}