diff --git a/llvm/test/Transforms/GVN/PRE/pre-loop-load.ll b/llvm/test/Transforms/GVN/PRE/pre-loop-load.ll
new file mode 100644
index 0000000000000..ec31754afb4ad
--- /dev/null
+++ b/llvm/test/Transforms/GVN/PRE/pre-loop-load.ll
@@ -0,0 +1,636 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt -basic-aa -enable-load-pre -enable-pre -gvn -S < %s | FileCheck %s
+; RUN:  opt -aa-pipeline=basic-aa -enable-load-pre -enable-pre -passes=gvn -S < %s | FileCheck %s
+
+declare void @side_effect()
+declare i1 @side_effect_cond()
+
+declare i32 @personality_function()
+
+; TODO: We can PRE the load away from the hot path.
+define i32 @test_load_on_cold_path(i32* %p) {
+; CHECK-LABEL: @test_load_on_cold_path(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    br label [[LOOP:%.*]]
+; CHECK:       loop:
+; CHECK-NEXT:    [[IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[BACKEDGE:%.*]] ]
+; CHECK-NEXT:    [[X:%.*]] = load i32, i32* [[P:%.*]], align 4
+; CHECK-NEXT:    [[COND:%.*]] = icmp ne i32 [[X]], 0
+; CHECK-NEXT:    br i1 [[COND]], label [[HOT_PATH:%.*]], label [[COLD_PATH:%.*]]
+; CHECK:       hot_path:
+; CHECK-NEXT:    br label [[BACKEDGE]]
+; CHECK:       cold_path:
+; CHECK-NEXT:    call void @side_effect()
+; CHECK-NEXT:    br label [[BACKEDGE]]
+; CHECK:       backedge:
+; CHECK-NEXT:    [[IV_NEXT]] = add i32 [[IV]], [[X]]
+; CHECK-NEXT:    [[LOOP_COND:%.*]] = icmp ult i32 [[IV_NEXT]], 1000
+; CHECK-NEXT:    br i1 [[LOOP_COND]], label [[LOOP]], label [[EXIT:%.*]]
+; CHECK:       exit:
+; CHECK-NEXT:    ret i32 [[X]]
+;
+entry:
+  br label %loop
+
+loop:
+  %iv = phi i32 [ 0, %entry], [%iv.next, %backedge]
+  %x = load i32, i32* %p
+  %cond = icmp ne i32 %x, 0
+  br i1 %cond, label %hot_path, label %cold_path
+
+hot_path:
+  br label %backedge
+
+cold_path:
+  call void @side_effect()
+  br label %backedge
+
+backedge:
+  %iv.next = add i32 %iv, %x
+  %loop.cond = icmp ult i32 %iv.next, 1000
+  br i1 %loop.cond, label %loop, label %exit
+
+exit:
+  ret i32 %x
+}
+
+; PRE here is meaningless, so we should not do it.
+define i32 @test_load_on_both_paths(i32* %p) {
+; CHECK-LABEL: @test_load_on_both_paths(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    br label [[LOOP:%.*]]
+; CHECK:       loop:
+; CHECK-NEXT:    [[IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[BACKEDGE:%.*]] ]
+; CHECK-NEXT:    [[X:%.*]] = load i32, i32* [[P:%.*]], align 4
+; CHECK-NEXT:    [[COND:%.*]] = icmp ne i32 [[X]], 0
+; CHECK-NEXT:    br i1 [[COND]], label [[HOT_PATH:%.*]], label [[COLD_PATH:%.*]]
+; CHECK:       hot_path:
+; CHECK-NEXT:    call void @side_effect()
+; CHECK-NEXT:    br label [[BACKEDGE]]
+; CHECK:       cold_path:
+; CHECK-NEXT:    call void @side_effect()
+; CHECK-NEXT:    br label [[BACKEDGE]]
+; CHECK:       backedge:
+; CHECK-NEXT:    [[IV_NEXT]] = add i32 [[IV]], [[X]]
+; CHECK-NEXT:    [[LOOP_COND:%.*]] = icmp ult i32 [[IV_NEXT]], 1000
+; CHECK-NEXT:    br i1 [[LOOP_COND]], label [[LOOP]], label [[EXIT:%.*]]
+; CHECK:       exit:
+; CHECK-NEXT:    ret i32 [[X]]
+;
+entry:
+  br label %loop
+
+loop:
+  %iv = phi i32 [ 0, %entry], [%iv.next, %backedge]
+  %x = load i32, i32* %p
+  %cond = icmp ne i32 %x, 0
+  br i1 %cond, label %hot_path, label %cold_path
+
+hot_path:
+  call void @side_effect()
+  br label %backedge
+
+cold_path:
+  call void @side_effect()
+  br label %backedge
+
+backedge:
+  %iv.next = add i32 %iv, %x
+  %loop.cond = icmp ult i32 %iv.next, 1000
+  br i1 %loop.cond, label %loop, label %exit
+
+exit:
+  ret i32 %x
+}
+
+
+; We could PRE here, but it doesn't seem very profitable.
+define i32 @test_load_on_backedge(i32* %p) {
+; CHECK-LABEL: @test_load_on_backedge(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    br label [[LOOP:%.*]]
+; CHECK:       loop:
+; CHECK-NEXT:    [[IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[BACKEDGE:%.*]] ]
+; CHECK-NEXT:    [[X:%.*]] = load i32, i32* [[P:%.*]], align 4
+; CHECK-NEXT:    [[COND:%.*]] = icmp ne i32 [[X]], 0
+; CHECK-NEXT:    br i1 [[COND]], label [[HOT_PATH:%.*]], label [[COLD_PATH:%.*]]
+; CHECK:       hot_path:
+; CHECK-NEXT:    br label [[BACKEDGE]]
+; CHECK:       cold_path:
+; CHECK-NEXT:    br label [[BACKEDGE]]
+; CHECK:       backedge:
+; CHECK-NEXT:    [[IV_NEXT]] = add i32 [[IV]], [[X]]
+; CHECK-NEXT:    call void @side_effect()
+; CHECK-NEXT:    [[LOOP_COND:%.*]] = icmp ult i32 [[IV_NEXT]], 1000
+; CHECK-NEXT:    br i1 [[LOOP_COND]], label [[LOOP]], label [[EXIT:%.*]]
+; CHECK:       exit:
+; CHECK-NEXT:    ret i32 [[X]]
+;
+entry:
+  br label %loop
+
+loop:
+  %iv = phi i32 [ 0, %entry], [%iv.next, %backedge]
+  %x = load i32, i32* %p
+  %cond = icmp ne i32 %x, 0
+  br i1 %cond, label %hot_path, label %cold_path
+
+hot_path:
+  br label %backedge
+
+cold_path:
+  br label %backedge
+
+backedge:
+  %iv.next = add i32 %iv, %x
+  call void @side_effect()
+  %loop.cond = icmp ult i32 %iv.next, 1000
+  br i1 %loop.cond, label %loop, label %exit
+
+exit:
+  ret i32 %x
+}
+
+; TODO: We can PRE via splitting of the critical edge in the cold path.
+define i32 @test_load_on_exiting_cold_path_01(i32* %p) {
+; CHECK-LABEL: @test_load_on_exiting_cold_path_01(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    br label [[LOOP:%.*]]
+; CHECK:       loop:
+; CHECK-NEXT:    [[IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[BACKEDGE:%.*]] ]
+; CHECK-NEXT:    [[X:%.*]] = load i32, i32* [[P:%.*]], align 4
+; CHECK-NEXT:    [[COND:%.*]] = icmp ne i32 [[X]], 0
+; CHECK-NEXT:    br i1 [[COND]], label [[HOT_PATH:%.*]], label [[COLD_PATH:%.*]]
+; CHECK:       hot_path:
+; CHECK-NEXT:    br label [[BACKEDGE]]
+; CHECK:       cold_path:
+; CHECK-NEXT:    [[SIDE_COND:%.*]] = call i1 @side_effect_cond()
+; CHECK-NEXT:    br i1 [[SIDE_COND]], label [[BACKEDGE]], label [[COLD_EXIT:%.*]]
+; CHECK:       backedge:
+; CHECK-NEXT:    [[IV_NEXT]] = add i32 [[IV]], [[X]]
+; CHECK-NEXT:    [[LOOP_COND:%.*]] = icmp ult i32 [[IV_NEXT]], 1000
+; CHECK-NEXT:    br i1 [[LOOP_COND]], label [[LOOP]], label [[EXIT:%.*]]
+; CHECK:       exit:
+; CHECK-NEXT:    ret i32 [[X]]
+; CHECK:       cold_exit:
+; CHECK-NEXT:    ret i32 -1
+;
+entry:
+  br label %loop
+
+loop:
+  %iv = phi i32 [ 0, %entry], [%iv.next, %backedge]
+  %x = load i32, i32* %p
+  %cond = icmp ne i32 %x, 0
+  br i1 %cond, label %hot_path, label %cold_path
+
+hot_path:
+  br label %backedge
+
+cold_path:
+  %side_cond = call i1 @side_effect_cond()
+  br i1 %side_cond, label %backedge, label %cold_exit
+
+backedge:
+  %iv.next = add i32 %iv, %x
+  %loop.cond = icmp ult i32 %iv.next, 1000
+  br i1 %loop.cond, label %loop, label %exit
+
+exit:
+  ret i32 %x
+
+cold_exit:
+  ret i32 -1
+}
+
+; TODO: We can PRE via splitting of the critical edge in the cold path.
+define i32 @test_load_on_exiting_cold_path_02(i32* %p) gc "statepoint-example" personality i32 ()* @personality_function {
+; CHECK-LABEL: @test_load_on_exiting_cold_path_02(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    br label [[LOOP:%.*]]
+; CHECK:       loop:
+; CHECK-NEXT:    [[IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[BACKEDGE:%.*]] ]
+; CHECK-NEXT:    [[X:%.*]] = load i32, i32* [[P:%.*]], align 4
+; CHECK-NEXT:    [[COND:%.*]] = icmp ne i32 [[X]], 0
+; CHECK-NEXT:    br i1 [[COND]], label [[HOT_PATH:%.*]], label [[COLD_PATH:%.*]]
+; CHECK:       hot_path:
+; CHECK-NEXT:    br label [[BACKEDGE]]
+; CHECK:       cold_path:
+; CHECK-NEXT:    invoke void @side_effect()
+; CHECK-NEXT:    to label [[BACKEDGE]] unwind label [[COLD_EXIT:%.*]]
+; CHECK:       backedge:
+; CHECK-NEXT:    [[IV_NEXT]] = add i32 [[IV]], [[X]]
+; CHECK-NEXT:    [[LOOP_COND:%.*]] = icmp ult i32 [[IV_NEXT]], 1000
+; CHECK-NEXT:    br i1 [[LOOP_COND]], label [[LOOP]], label [[EXIT:%.*]]
+; CHECK:       exit:
+; CHECK-NEXT:    ret i32 [[X]]
+; CHECK:       cold_exit:
+; CHECK-NEXT:    [[LANDING_PAD:%.*]] = landingpad token
+; CHECK-NEXT:    cleanup
+; CHECK-NEXT:    ret i32 -1
+;
+entry:
+  br label %loop
+
+loop:
+  %iv = phi i32 [ 0, %entry], [%iv.next, %backedge]
+  %x = load i32, i32* %p
+  %cond = icmp ne i32 %x, 0
+  br i1 %cond, label %hot_path, label %cold_path
+
+hot_path:
+  br label %backedge
+
+cold_path:
+  invoke void @side_effect() to label %backedge unwind label %cold_exit
+
+backedge:
+  %iv.next = add i32 %iv, %x
+  %loop.cond = icmp ult i32 %iv.next, 1000
+  br i1 %loop.cond, label %loop, label %exit
+
+exit:
+  ret i32 %x
+
+cold_exit:
+  %landing_pad = landingpad token
+  cleanup
+  ret i32 -1
+}
+
+; Make sure we do not insert load into both cold path & backedge.
+define i32 @test_load_on_cold_path_and_backedge(i32* %p) {
+; CHECK-LABEL: @test_load_on_cold_path_and_backedge(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    br label [[LOOP:%.*]]
+; CHECK:       loop:
+; CHECK-NEXT:    [[IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[BACKEDGE:%.*]] ]
+; CHECK-NEXT:    [[X:%.*]] = load i32, i32* [[P:%.*]], align 4
+; CHECK-NEXT:    [[COND:%.*]] = icmp ne i32 [[X]], 0
+; CHECK-NEXT:    br i1 [[COND]], label [[HOT_PATH:%.*]], label [[COLD_PATH:%.*]]
+; CHECK:       hot_path:
+; CHECK-NEXT:    br label [[BACKEDGE]]
+; CHECK:       cold_path:
+; CHECK-NEXT:    call void @side_effect()
+; CHECK-NEXT:    br label [[BACKEDGE]]
+; CHECK:       backedge:
+; CHECK-NEXT:    [[IV_NEXT]] = add i32 [[IV]], [[X]]
+; CHECK-NEXT:    [[LOOP_COND:%.*]] = icmp ult i32 [[IV_NEXT]], 1000
+; CHECK-NEXT:    call void @side_effect()
+; CHECK-NEXT:    br i1 [[LOOP_COND]], label [[LOOP]], label [[EXIT:%.*]]
+; CHECK:       exit:
+; CHECK-NEXT:    ret i32 [[X]]
+;
+entry:
+  br label %loop
+
+loop:
+  %iv = phi i32 [ 0, %entry], [%iv.next, %backedge]
+  %x = load i32, i32* %p
+  %cond = icmp ne i32 %x, 0
+  br i1 %cond, label %hot_path, label %cold_path
+
+hot_path:
+  br label %backedge
+
+cold_path:
+  call void @side_effect()
+  br label %backedge
+
+backedge:
+  %iv.next = add i32 %iv, %x
+  %loop.cond = icmp ult i32 %iv.next, 1000
+  call void @side_effect()
+  br i1 %loop.cond, label %loop, label %exit
+
+exit:
+  ret i32 %x
+}
+
+; TODO: We can PRE the load away from the hot path. Make sure we only insert 1 load.
+define i32 @test_load_multi_block_cold_path(i32* %p) {
+; CHECK-LABEL: @test_load_multi_block_cold_path(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    br label [[LOOP:%.*]]
+; CHECK:       loop:
+; CHECK-NEXT:    [[IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[BACKEDGE:%.*]] ]
+; CHECK-NEXT:    [[X:%.*]] = load i32, i32* [[P:%.*]], align 4
+; CHECK-NEXT:    [[COND:%.*]] = icmp ne i32 [[X]], 0
+; CHECK-NEXT:    br i1 [[COND]], label [[HOT_PATH:%.*]], label [[COLD_PATH_1:%.*]]
+; CHECK:       hot_path:
+; CHECK-NEXT:    br label [[BACKEDGE]]
+; CHECK:       cold_path.1:
+; CHECK-NEXT:    call void @side_effect()
+; CHECK-NEXT:    call void @side_effect()
+; CHECK-NEXT:    call void @side_effect()
+; CHECK-NEXT:    br label [[BACKEDGE]]
+; CHECK:       backedge:
+; CHECK-NEXT:    [[IV_NEXT]] = add i32 [[IV]], [[X]]
+; CHECK-NEXT:    [[LOOP_COND:%.*]] = icmp ult i32 [[IV_NEXT]], 1000
+; CHECK-NEXT:    call void @side_effect()
+; CHECK-NEXT:    br i1 [[LOOP_COND]], label [[LOOP]], label [[EXIT:%.*]]
+; CHECK:       exit:
+; CHECK-NEXT:    ret i32 [[X]]
+;
+entry:
+  br label %loop
+
+loop:
+  %iv = phi i32 [ 0, %entry], [%iv.next, %backedge]
+  %x = load i32, i32* %p
+  %cond = icmp ne i32 %x, 0
+  br i1 %cond, label %hot_path, label %cold_path.1
+
+hot_path:
+  br label %backedge
+
+cold_path.1:
+  call void @side_effect()
+  br label %cold_path.2
+
+cold_path.2:
+  call void @side_effect()
+  br label %cold_path.3
+
+cold_path.3:
+  call void @side_effect()
+  br label %backedge
+
+backedge:
+  %iv.next = add i32 %iv, %x
+  %loop.cond = icmp ult i32 %iv.next, 1000
+  call void @side_effect()
+  br i1 %loop.cond, label %loop, label %exit
+
+exit:
+  ret i32 %x
+}
+
+; TODO: We can PRE via splitting of the critical edge in the cold path. Make sure we only insert 1 load.
+define i32 @test_load_on_multi_exiting_cold_path(i32* %p) {
+; CHECK-LABEL: @test_load_on_multi_exiting_cold_path(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    br label [[LOOP:%.*]]
+; CHECK:       loop:
+; CHECK-NEXT:    [[IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[BACKEDGE:%.*]] ]
+; CHECK-NEXT:    [[X:%.*]] = load i32, i32* [[P:%.*]], align 4
+; CHECK-NEXT:    [[COND:%.*]] = icmp ne i32 [[X]], 0
+; CHECK-NEXT:    br i1 [[COND]], label [[HOT_PATH:%.*]], label [[COLD_PATH_1:%.*]]
+; CHECK:       hot_path:
+; CHECK-NEXT:    br label [[BACKEDGE]]
+; CHECK:       cold_path.1:
+; CHECK-NEXT:    [[SIDE_COND_1:%.*]] = call i1 @side_effect_cond()
+; CHECK-NEXT:    br i1 [[SIDE_COND_1]], label [[COLD_PATH_2:%.*]], label [[COLD_EXIT:%.*]]
+; CHECK:       cold_path.2:
+; CHECK-NEXT:    [[SIDE_COND_2:%.*]] = call i1 @side_effect_cond()
+; CHECK-NEXT:    br i1 [[SIDE_COND_2]], label [[COLD_PATH_3:%.*]], label [[COLD_EXIT]]
+; CHECK:       cold_path.3:
+; CHECK-NEXT:    [[SIDE_COND_3:%.*]] = call i1 @side_effect_cond()
+; CHECK-NEXT:    br i1 [[SIDE_COND_3]], label [[BACKEDGE]], label [[COLD_EXIT]]
+; CHECK:       backedge:
+; CHECK-NEXT:    [[IV_NEXT]] = add i32 [[IV]], [[X]]
+; CHECK-NEXT:    [[LOOP_COND:%.*]] = icmp ult i32 [[IV_NEXT]], 1000
+; CHECK-NEXT:    br i1 [[LOOP_COND]], label [[LOOP]], label [[EXIT:%.*]]
+; CHECK:       exit:
+; CHECK-NEXT:    ret i32 [[X]]
+; CHECK:       cold_exit:
+; CHECK-NEXT:    ret i32 -1
+;
+entry:
+  br label %loop
+
+loop:
+  %iv = phi i32 [ 0, %entry], [%iv.next, %backedge]
+  %x = load i32, i32* %p
+  %cond = icmp ne i32 %x, 0
+  br i1 %cond, label %hot_path, label %cold_path.1
+
+hot_path:
+  br label %backedge
+
+cold_path.1:
+  %side_cond.1 = call i1 @side_effect_cond()
+  br i1 %side_cond.1, label %cold_path.2, label %cold_exit
+
+cold_path.2:
+  %side_cond.2 = call i1 @side_effect_cond()
+  br i1 %side_cond.2, label %cold_path.3, label %cold_exit
+
+cold_path.3:
+  %side_cond.3 = call i1 @side_effect_cond()
+  br i1 %side_cond.3, label %backedge, label %cold_exit
+
+backedge:
+  %iv.next = add i32 %iv, %x
+  %loop.cond = icmp ult i32 %iv.next, 1000
+  br i1 %loop.cond, label %loop, label %exit
+
+exit:
+  ret i32 %x
+
+cold_exit:
+  ret i32 -1
+}
+
+; TODO: PRE via splittinga backedge in the cold loop. Make sure we don't insert a load into an inner loop.
+define i32 @test_inner_loop(i32* %p) {
+; CHECK-LABEL: @test_inner_loop(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    br label [[LOOP:%.*]]
+; CHECK:       loop:
+; CHECK-NEXT:    [[IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[BACKEDGE:%.*]] ]
+; CHECK-NEXT:    [[X:%.*]] = load i32, i32* [[P:%.*]], align 4
+; CHECK-NEXT:    [[COND:%.*]] = icmp ne i32 [[X]], 0
+; CHECK-NEXT:    br i1 [[COND]], label [[HOT_PATH:%.*]], label [[COLD_PATH:%.*]]
+; CHECK:       hot_path:
+; CHECK-NEXT:    br label [[BACKEDGE]]
+; CHECK:       cold_path:
+; CHECK-NEXT:    br label [[INNER_LOOP:%.*]]
+; CHECK:       inner_loop:
+; CHECK-NEXT:    call void @side_effect()
+; CHECK-NEXT:    br i1 undef, label [[INNER_LOOP]], label [[BACKEDGE]]
+; CHECK:       backedge:
+; CHECK-NEXT:    [[IV_NEXT]] = add i32 [[IV]], [[X]]
+; CHECK-NEXT:    [[LOOP_COND:%.*]] = icmp ult i32 [[IV_NEXT]], 1000
+; CHECK-NEXT:    br i1 [[LOOP_COND]], label [[LOOP]], label [[EXIT:%.*]]
+; CHECK:       exit:
+; CHECK-NEXT:    ret i32 [[X]]
+;
+entry:
+  br label %loop
+
+loop:
+  %iv = phi i32 [ 0, %entry], [%iv.next, %backedge]
+  %x = load i32, i32* %p
+  %cond = icmp ne i32 %x, 0
+  br i1 %cond, label %hot_path, label %cold_path
+
+hot_path:
+  br label %backedge
+
+cold_path:
+  br label %inner_loop
+
+inner_loop:
+  call void @side_effect()
+  br i1 undef, label %inner_loop, label %backedge
+
+backedge:
+  %iv.next = add i32 %iv, %x
+  %loop.cond = icmp ult i32 %iv.next, 1000
+  br i1 %loop.cond, label %loop, label %exit
+
+exit:
+  ret i32 %x
+}
+
+; TODO: We can PRE here, but profitablility depends on frequency of cold blocks. Conservatively, we should not do it unless there is a reason.
+define i32 @test_multiple_cold_paths(i32* %p) {
+; CHECK-LABEL: @test_multiple_cold_paths(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    br label [[LOOP:%.*]]
+; CHECK:       loop:
+; CHECK-NEXT:    [[IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[BACKEDGE:%.*]] ]
+; CHECK-NEXT:    [[X:%.*]] = load i32, i32* [[P:%.*]], align 4
+; CHECK-NEXT:    [[COND_1:%.*]] = icmp ne i32 [[X]], 0
+; CHECK-NEXT:    br i1 [[COND_1]], label [[HOT_PATH_1:%.*]], label [[COLD_PATH_1:%.*]]
+; CHECK:       hot_path.1:
+; CHECK-NEXT:    br label [[DOM_1:%.*]]
+; CHECK:       cold_path.1:
+; CHECK-NEXT:    call void @side_effect()
+; CHECK-NEXT:    br label [[DOM_1]]
+; CHECK:       dom.1:
+; CHECK-NEXT:    [[COND_2:%.*]] = icmp ne i32 [[X]], 1
+; CHECK-NEXT:    br i1 [[COND_2]], label [[HOT_PATH_2:%.*]], label [[COLD_PATH_2:%.*]]
+; CHECK:       hot_path.2:
+; CHECK-NEXT:    br label [[DOM_2:%.*]]
+; CHECK:       cold_path.2:
+; CHECK-NEXT:    call void @side_effect()
+; CHECK-NEXT:    br label [[DOM_2]]
+; CHECK:       dom.2:
+; CHECK-NEXT:    [[COND_3:%.*]] = icmp ne i32 [[X]], 2
+; CHECK-NEXT:    br i1 [[COND_3]], label [[HOT_PATH_3:%.*]], label [[COLD_PATH_3:%.*]]
+; CHECK:       hot_path.3:
+; CHECK-NEXT:    br label [[BACKEDGE]]
+; CHECK:       cold_path.3:
+; CHECK-NEXT:    call void @side_effect()
+; CHECK-NEXT:    br label [[BACKEDGE]]
+; CHECK:       backedge:
+; CHECK-NEXT:    [[IV_NEXT]] = add i32 [[IV]], [[X]]
+; CHECK-NEXT:    [[LOOP_COND:%.*]] = icmp ult i32 [[IV_NEXT]], 1000
+; CHECK-NEXT:    br i1 [[LOOP_COND]], label [[LOOP]], label [[EXIT:%.*]]
+; CHECK:       exit:
+; CHECK-NEXT:    ret i32 [[X]]
+;
+entry:
+  br label %loop
+
+loop:
+  %iv = phi i32 [ 0, %entry], [%iv.next, %backedge]
+  %x = load i32, i32* %p
+  %cond.1 = icmp ne i32 %x, 0
+  br i1 %cond.1, label %hot_path.1, label %cold_path.1
+
+hot_path.1:
+  br label %dom.1
+
+cold_path.1:
+  call void @side_effect()
+  br label %dom.1
+
+dom.1:
+  %cond.2 = icmp ne i32 %x, 1
+  br i1 %cond.2, label %hot_path.2, label %cold_path.2
+
+hot_path.2:
+  br label %dom.2
+
+cold_path.2:
+  call void @side_effect()
+  br label %dom.2
+
+dom.2:
+  %cond.3 = icmp ne i32 %x, 2
+  br i1 %cond.3, label %hot_path.3, label %cold_path.3
+
+hot_path.3:
+  br label %backedge
+
+cold_path.3:
+  call void @side_effect()
+  br label %backedge
+
+backedge:
+  %iv.next = add i32 %iv, %x
+  %loop.cond = icmp ult i32 %iv.next, 1000
+  br i1 %loop.cond, label %loop, label %exit
+
+exit:
+  ret i32 %x
+}
+
+; TODO: We can PRE via split of critical edge.
+define i32 @test_side_exit_after_merge(i32* %p) {
+; CHECK-LABEL: @test_side_exit_after_merge(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    br label [[LOOP:%.*]]
+; CHECK:       loop:
+; CHECK-NEXT:    [[IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[BACKEDGE:%.*]] ]
+; CHECK-NEXT:    [[X:%.*]] = load i32, i32* [[P:%.*]], align 4
+; CHECK-NEXT:    [[COND:%.*]] = icmp ne i32 [[X]], 0
+; CHECK-NEXT:    br i1 [[COND]], label [[HOT_PATH:%.*]], label [[COLD_PATH:%.*]]
+; CHECK:       hot_path:
+; CHECK-NEXT:    br label [[BACKEDGE]]
+; CHECK:       cold_path:
+; CHECK-NEXT:    [[COND_1:%.*]] = icmp ne i32 [[IV]], 1
+; CHECK-NEXT:    br i1 [[COND_1]], label [[DO_CALL:%.*]], label [[SIDE_EXITING:%.*]]
+; CHECK:       do_call:
+; CHECK-NEXT:    [[SIDE_COND:%.*]] = call i1 @side_effect_cond()
+; CHECK-NEXT:    br label [[SIDE_EXITING]]
+; CHECK:       side_exiting:
+; CHECK-NEXT:    [[SIDE_COND_PHI:%.*]] = phi i1 [ [[SIDE_COND]], [[DO_CALL]] ], [ true, [[COLD_PATH]] ]
+; CHECK-NEXT:    br i1 [[SIDE_COND_PHI]], label [[BACKEDGE]], label [[COLD_EXIT:%.*]]
+; CHECK:       backedge:
+; CHECK-NEXT:    [[IV_NEXT]] = add i32 [[IV]], [[X]]
+; CHECK-NEXT:    [[LOOP_COND:%.*]] = icmp ult i32 [[IV_NEXT]], 1000
+; CHECK-NEXT:    br i1 [[LOOP_COND]], label [[LOOP]], label [[EXIT:%.*]]
+; CHECK:       exit:
+; CHECK-NEXT:    ret i32 [[X]]
+; CHECK:       cold_exit:
+; CHECK-NEXT:    ret i32 -1
+;
+entry:
+  br label %loop
+
+loop:
+  %iv = phi i32 [ 0, %entry], [%iv.next, %backedge]
+  %x = load i32, i32* %p
+  %cond = icmp ne i32 %x, 0
+  br i1 %cond, label %hot_path, label %cold_path
+
+hot_path:
+  br label %backedge
+
+cold_path:
+  %cond.1 = icmp ne i32 %iv, 1
+  br i1 %cond.1, label %do_call, label %side_exiting
+
+do_call:
+  %side_cond = call i1 @side_effect_cond()
+  br label %side_exiting
+
+side_exiting:
+  %side_cond_phi = phi i1 [%side_cond, %do_call], [true, %cold_path]
+  br i1 %side_cond_phi, label %backedge, label %cold_exit
+
+backedge:
+  %iv.next = add i32 %iv, %x
+  %loop.cond = icmp ult i32 %iv.next, 1000
+  br i1 %loop.cond, label %loop, label %exit
+
+exit:
+  ret i32 %x
+
+cold_exit:
+  ret i32 -1
+}