1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; RUN: opt < %s -passes=gvn -S | FileCheck %s 3 4; This test checks that we don't hang trying to split a critical edge in scalar 5; 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 i32 15; 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 i32 20; 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 4 25; CHECK-NEXT: ret void 26; 27bb: 28 %tmp5 = or i64 %arg2, %arg 29 callbr void asm sideeffect "", "!i,!i"() 30 to label %bb6 [label %bb7, label %bb9] 31 32bb6: ; preds = %bb 33 br label %bb7 34 35bb7: ; preds = %bb6, %bb 36 %tmp8 = trunc i64 %tmp5 to i32 37 tail call void @barney(i32 %tmp8) 38 br label %bb9 39 40bb9: ; preds = %bb7, %bb 41 %tmp10 = trunc i64 %tmp5 to i32 42 store i32 %tmp10, ptr %arg3 43 ret void 44} 45 46declare void @barney(i32) 47