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1; RUN: opt -loop-reduce -S < %s | FileCheck %s
2;
3; LTO of clang, which mistakenly uses no TargetLoweringInfo, causes a
4; miscompile. ReuseOrCreateCast replace ptrtoint operand with undef.
5; Reproducing the miscompile requires no triple, hence no "TTI".
6; rdar://13007381
7
8target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
9
10; Verify that nothing uses the "dead" ptrtoint from "undef".
11; CHECK-LABEL: @VerifyDiagnosticConsumerTest(
12; CHECK: bb:
13; "dead" ptrpoint not emitted (or dead code eliminated) with
14; current LSR cost model.
15; CHECK-NOT: = ptrtoint i8* undef to i64
16; CHECK: .lr.ph
17; CHECK: [[TMP:%[^ ]+]] = add i64 %tmp5, 1
18; CHECK: sub i64 [[TMP]], %tmp6
19; CHECK: ret void
20define void @VerifyDiagnosticConsumerTest() unnamed_addr nounwind uwtable align 2 {
21bb:
22  %tmp3 = call i8* @getCharData() nounwind
23  %tmp4 = call i8* @getCharData() nounwind
24  %tmp5 = ptrtoint i8* %tmp4 to i64
25  %tmp6 = ptrtoint i8* %tmp3 to i64
26  %tmp7 = sub i64 %tmp5, %tmp6
27  br i1 undef, label %bb87, label %.preheader
28
29.preheader:                                       ; preds = %bb10, %bb
30  br i1 undef, label %_ZNK4llvm9StringRef4findEcm.exit42.thread, label %bb10
31
32bb10:                                             ; preds = %.preheader
33  br i1 undef, label %_ZNK4llvm9StringRef4findEcm.exit42, label %.preheader
34
35_ZNK4llvm9StringRef4findEcm.exit42:               ; preds = %bb10
36  br i1 undef, label %_ZNK4llvm9StringRef4findEcm.exit42.thread, label %.lr.ph
37
38_ZNK4llvm9StringRef4findEcm.exit42.thread:        ; preds = %_ZNK4llvm9StringRef4findEcm.exit42, %.preheader
39  unreachable
40
41.lr.ph:                                           ; preds = %_ZNK4llvm9StringRef4findEcm.exit42
42  br label %bb36
43
44_ZNK4llvm9StringRef4findEcm.exit.loopexit:        ; preds = %bb63
45  %tmp21 = icmp eq i64 %i.0.i, -1
46  br i1 %tmp21, label %_ZNK4llvm9StringRef4findEcm.exit._crit_edge, label %bb36
47
48_ZNK4llvm9StringRef4findEcm.exit._crit_edge:      ; preds = %bb61, %_ZNK4llvm9StringRef4findEcm.exit.loopexit
49  unreachable
50
51bb36:                                             ; preds = %_ZNK4llvm9StringRef4findEcm.exit.loopexit, %.lr.ph
52  %loc.063 = phi i64 [ undef, %.lr.ph ], [ %i.0.i, %_ZNK4llvm9StringRef4findEcm.exit.loopexit ]
53  switch i8 undef, label %bb57 [
54    i8 10, label %bb48
55    i8 13, label %bb48
56  ]
57
58bb48:                                             ; preds = %bb36, %bb36
59  br label %bb58
60
61bb57:                                             ; preds = %bb36
62  br label %bb58
63
64bb58:                                             ; preds = %bb57, %bb48
65  %tmp59 = icmp ugt i64 %tmp7, undef
66  %tmp60 = select i1 %tmp59, i64 undef, i64 %tmp7
67  br label %bb61
68
69bb61:                                             ; preds = %bb63, %bb58
70  %i.0.i = phi i64 [ %tmp60, %bb58 ], [ %tmp67, %bb63 ]
71  %tmp62 = icmp eq i64 %i.0.i, %tmp7
72  br i1 %tmp62, label %_ZNK4llvm9StringRef4findEcm.exit._crit_edge, label %bb63
73
74bb63:                                             ; preds = %bb61
75  %tmp64 = getelementptr inbounds i8, i8* %tmp3, i64 %i.0.i
76  %tmp65 = load i8, i8* %tmp64, align 1
77  %tmp67 = add i64 %i.0.i, 1
78  br i1 undef, label %_ZNK4llvm9StringRef4findEcm.exit.loopexit, label %bb61
79
80bb87:                                             ; preds = %bb
81  ret void
82}
83
84declare i8* @getCharData()
85