; RUN: llc -march=x86-64 -mcpu=corei7 -disable-cgp-select2branch < %s ; We should not crash on this test. target 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" target triple = "i386-apple-darwin9.0.0" @global = external constant [411 x i8], align 1 define void @snork() nounwind { bb: br i1 undef, label %bb26, label %bb27 bb26: ; preds = %bb48, %bb26, %bb switch i32 undef, label %bb26 [ i32 142771596, label %bb28 ] bb27: ; preds = %bb48, %bb switch i32 undef, label %bb49 [ i32 142771596, label %bb28 ] bb28: ; preds = %bb27, %bb26 %tmp = load i32, i32* null %tmp29 = trunc i32 %tmp to i8 store i8* undef, i8** undef %tmp30 = load i32, i32* null %tmp31 = icmp eq i32 %tmp30, 0 %tmp32 = getelementptr inbounds [411 x i8], [411 x i8]* @global, i32 0, i32 undef %tmp33 = load i8, i8* %tmp32, align 1 %tmp34 = getelementptr inbounds [411 x i8], [411 x i8]* @global, i32 0, i32 0 %tmp35 = load i8, i8* %tmp34, align 1 %tmp36 = select i1 %tmp31, i8 %tmp35, i8 %tmp33 %tmp37 = select i1 undef, i8 %tmp29, i8 %tmp36 %tmp38 = zext i8 %tmp37 to i32 %tmp39 = select i1 undef, i32 0, i32 %tmp38 %tmp40 = getelementptr inbounds i32, i32* null, i32 %tmp39 %tmp41 = load i32, i32* %tmp40, align 4 %tmp42 = load i32, i32* undef, align 4 %tmp43 = load i32, i32* undef %tmp44 = xor i32 %tmp42, %tmp43 %tmp45 = lshr i32 %tmp44, 8 %tmp46 = lshr i32 %tmp44, 7 call void @spam() unreachable bb47: ; No predecessors! ret void bb48: ; No predecessors! br i1 undef, label %bb27, label %bb26 bb49: ; preds = %bb49, %bb27 br label %bb49 bb50: ; preds = %bb50 br label %bb50 } declare void @spam() noreturn nounwind