1; RUN: llc -mcpu=corei7 -disable-cgp-select2branch < %s 2 3; We should not crash on this test. 4 5target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128-n8:16:32" 6target triple = "x86_64-apple-darwin9.0.0" 7 8@global = external constant [411 x i8], align 1 9 10define void @snork() nounwind { 11bb: 12 br i1 undef, label %bb26, label %bb27 13 14bb26: ; preds = %bb48, %bb26, %bb 15 switch i32 undef, label %bb26 [ 16 i32 142771596, label %bb28 17 ] 18 19bb27: ; preds = %bb48, %bb 20 switch i32 undef, label %bb49 [ 21 i32 142771596, label %bb28 22 ] 23 24bb28: ; preds = %bb27, %bb26 25 %tmp = load i32, ptr null 26 %tmp29 = trunc i32 %tmp to i8 27 store ptr undef, ptr undef 28 %tmp30 = load i32, ptr null 29 %tmp31 = icmp eq i32 %tmp30, 0 30 %tmp32 = getelementptr inbounds [411 x i8], ptr @global, i32 0, i32 undef 31 %tmp33 = load i8, ptr %tmp32, align 1 32 %tmp35 = load i8, ptr @global, align 1 33 %tmp36 = select i1 %tmp31, i8 %tmp35, i8 %tmp33 34 %tmp37 = select i1 undef, i8 %tmp29, i8 %tmp36 35 %tmp38 = zext i8 %tmp37 to i32 36 %tmp39 = select i1 undef, i32 0, i32 %tmp38 37 %tmp40 = getelementptr inbounds i32, ptr null, i32 %tmp39 38 %tmp41 = load i32, ptr %tmp40, align 4 39 %tmp42 = load i32, ptr undef, align 4 40 %tmp43 = load i32, ptr undef 41 %tmp44 = xor i32 %tmp42, %tmp43 42 %tmp45 = lshr i32 %tmp44, 8 43 %tmp46 = lshr i32 %tmp44, 7 44 call void @spam() 45 unreachable 46 47bb47: ; No predecessors! 48 ret void 49 50bb48: ; No predecessors! 51 br i1 undef, label %bb27, label %bb26 52 53bb49: ; preds = %bb49, %bb27 54 br label %bb49 55 56bb50: ; preds = %bb50 57 br label %bb50 58} 59 60declare void @spam() noreturn nounwind 61