1 ; RUN: opt < %s -simplifycfg -S | not grep bb17 2 ; PR1786 3 4 define i32 @main() { 5 entry: 6 %retval = alloca i32, align 4 ; <i32*> [#uses=1] 7 %i = alloca i32, align 4 ; <i32*> [#uses=7] 8 %z = alloca i32, align 4 ; <i32*> [#uses=4] 9 %z16 = alloca i32, align 4 ; <i32*> [#uses=4] 10 %"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0] 11 store i32 0, i32* %i 12 %toBool = icmp ne i8 1, 0 ; <i1> [#uses=1] 13 br i1 %toBool, label %cond_true, label %cond_false 14 15 cond_true: ; preds = %entry 16 store i32 0, i32* %z 17 br label %bb 18 19 bb: ; preds = %cond_next, %cond_true 20 %tmp = load i32, i32* %z ; <i32> [#uses=1] 21 %tmp1 = sub i32 %tmp, 16384 ; <i32> [#uses=1] 22 store i32 %tmp1, i32* %z 23 %tmp2 = load i32, i32* %i ; <i32> [#uses=1] 24 %tmp3 = add i32 %tmp2, 1 ; <i32> [#uses=1] 25 store i32 %tmp3, i32* %i 26 %tmp4 = load i32, i32* %i ; <i32> [#uses=1] 27 %tmp5 = icmp sgt i32 %tmp4, 262144 ; <i1> [#uses=1] 28 %tmp56 = zext i1 %tmp5 to i8 ; <i8> [#uses=1] 29 %toBool7 = icmp ne i8 %tmp56, 0 ; <i1> [#uses=1] 30 br i1 %toBool7, label %cond_true8, label %cond_next 31 32 cond_true8: ; preds = %bb 33 call void @abort( ) 34 unreachable 35 36 cond_next: ; preds = %bb 37 %tmp9 = load i32, i32* %z ; <i32> [#uses=1] 38 %tmp10 = icmp ne i32 %tmp9, 0 ; <i1> [#uses=1] 39 %tmp1011 = zext i1 %tmp10 to i8 ; <i8> [#uses=1] 40 %toBool12 = icmp ne i8 %tmp1011, 0 ; <i1> [#uses=1] 41 br i1 %toBool12, label %bb, label %bb13 42 43 bb13: ; preds = %cond_next 44 call void @exit( i32 0 ) 45 unreachable 46 47 cond_false: ; preds = %entry 48 %toBool14 = icmp ne i8 1, 0 ; <i1> [#uses=1] 49 br i1 %toBool14, label %cond_true15, label %cond_false33 50 51 cond_true15: ; preds = %cond_false 52 store i32 0, i32* %z16 53 br label %bb17 54 55 bb17: ; preds = %cond_next27, %cond_true15 56 %tmp18 = load i32, i32* %z16 ; <i32> [#uses=1] 57 %tmp19 = sub i32 %tmp18, 16384 ; <i32> [#uses=1] 58 store i32 %tmp19, i32* %z16 59 %tmp20 = load i32, i32* %i ; <i32> [#uses=1] 60 %tmp21 = add i32 %tmp20, 1 ; <i32> [#uses=1] 61 store i32 %tmp21, i32* %i 62 %tmp22 = load i32, i32* %i ; <i32> [#uses=1] 63 %tmp23 = icmp sgt i32 %tmp22, 262144 ; <i1> [#uses=1] 64 %tmp2324 = zext i1 %tmp23 to i8 ; <i8> [#uses=1] 65 %toBool25 = icmp ne i8 %tmp2324, 0 ; <i1> [#uses=1] 66 br i1 %toBool25, label %cond_true26, label %cond_next27 67 68 cond_true26: ; preds = %bb17 69 call void @abort( ) 70 unreachable 71 72 cond_next27: ; preds = %bb17 73 %tmp28 = load i32, i32* %z16 ; <i32> [#uses=1] 74 %tmp29 = icmp ne i32 %tmp28, 0 ; <i1> [#uses=1] 75 %tmp2930 = zext i1 %tmp29 to i8 ; <i8> [#uses=1] 76 %toBool31 = icmp ne i8 %tmp2930, 0 ; <i1> [#uses=1] 77 br i1 %toBool31, label %bb17, label %bb32 78 79 bb32: ; preds = %cond_next27 80 call void @exit( i32 0 ) 81 unreachable 82 83 cond_false33: ; preds = %cond_false 84 call void @exit( i32 0 ) 85 unreachable 86 87 cond_next34: ; No predecessors! 88 br label %cond_next35 89 90 cond_next35: ; preds = %cond_next34 91 br label %return 92 93 return: ; preds = %cond_next35 94 %retval36 = load i32, i32* %retval ; <i32> [#uses=1] 95 ret i32 %retval36 96 } 97 98 declare void @abort() 99 100 declare void @exit(i32) 101
