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1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py2; RUN: opt < %s -passes=gvn -S | FileCheck %s3 4; This test checks that we don't hang trying to split a critical edge in scalar5; PRE when the control flow uses a callbr instruction.6 7define void @wombat(i64 %arg, ptr %arg1, i64 %arg2, ptr %arg3) {8; CHECK-LABEL: @wombat(9; CHECK-NEXT: bb:10; CHECK-NEXT: [[TMP5:%.*]] = or i64 [[ARG2:%.*]], [[ARG:%.*]]11; CHECK-NEXT: callbr void asm sideeffect "", "!i,!i"()12; CHECK-NEXT: to label [[BB6:%.*]] [label [[BB7:%.*]], label %bb.bb9_crit_edge]13; CHECK: bb.bb9_crit_edge:14; CHECK-NEXT: [[DOTPRE:%.*]] = trunc i64 [[TMP5]] to i3215; CHECK-NEXT: br label [[BB9:%.*]]16; CHECK: bb6:17; CHECK-NEXT: br label [[BB7]]18; CHECK: bb7:19; CHECK-NEXT: [[TMP8:%.*]] = trunc i64 [[TMP5]] to i3220; CHECK-NEXT: tail call void @barney(i32 [[TMP8]])21; CHECK-NEXT: br label [[BB9]]22; CHECK: bb9:23; CHECK-NEXT: [[TMP10_PRE_PHI:%.*]] = phi i32 [ [[DOTPRE]], [[BB_BB9_CRIT_EDGE:%.*]] ], [ [[TMP8]], [[BB7]] ]24; CHECK-NEXT: store i32 [[TMP10_PRE_PHI]], ptr [[ARG3:%.*]], align 425; CHECK-NEXT: ret void26;27bb:28 %tmp5 = or i64 %arg2, %arg29 callbr void asm sideeffect "", "!i,!i"()30 to label %bb6 [label %bb7, label %bb9]31 32bb6: ; preds = %bb33 br label %bb734 35bb7: ; preds = %bb6, %bb36 %tmp8 = trunc i64 %tmp5 to i3237 tail call void @barney(i32 %tmp8)38 br label %bb939 40bb9: ; preds = %bb7, %bb41 %tmp10 = trunc i64 %tmp5 to i3242 store i32 %tmp10, ptr %arg343 ret void44}45 46declare void @barney(i32)47