source: icGREP/icgrep-devel/llvm-3.8.0.src/test/Analysis/ValueTracking/pr24866.ll @ 5027

Last change on this file since 5027 was 5027, checked in by cameron, 3 years ago

Upgrade to llvm 3.8

File size: 2.2 KB
Line 
1; RUN: opt -S %s -value-tracking-dom-conditions -licm -load-combine | FileCheck %s
2; In pr24866.ll, we saw a crash when accessing a nullptr returned when
3; asking for a dominator tree Node.  This reproducer is really fragile,
4; but it's currently the best we have.
5
6%struct.c_derived_tbl.2.5.8.11.14.17.23.38.59.80.92.98.104.107.155.183 = type { [256 x i32], [256 x i8] }
7
8
9; Function Attrs: nounwind uwtable
10define void @encode_one_blockX2(%struct.c_derived_tbl.2.5.8.11.14.17.23.38.59.80.92.98.104.107.155.183* nocapture readonly %actbl) #0 {
11; CHECK-LABEL: @encode_one_blockX2
12entry:
13  br i1 false, label %L_KLOOP_01, label %L_KLOOP.preheader
14
15L_KLOOP_01:                                       ; preds = %while.end, %entry
16  br label %L_KLOOP.preheader
17
18L_KLOOP_08:                                       ; preds = %while.end
19  br label %L_KLOOP.preheader
20
21L_KLOOP.preheader:                                ; preds = %L_KLOOP_08, %L_KLOOP_01, %entry
22  %r.2.ph = phi i32 [ undef, %L_KLOOP_08 ], [ 0, %entry ], [ undef, %L_KLOOP_01 ]
23  br label %L_KLOOP
24
25L_KLOOP:                                          ; preds = %while.end, %L_KLOOP.preheader
26  %r.2 = phi i32 [ 0, %while.end ], [ %r.2.ph, %L_KLOOP.preheader ]
27  br i1 true, label %while.body, label %while.end
28
29while.body:                                       ; preds = %while.body, %L_KLOOP
30  br label %while.body
31
32while.end:                                        ; preds = %L_KLOOP
33  %shl105 = shl i32 %r.2, 4
34  %add106 = add nsw i32 %shl105, undef
35  %idxprom107 = sext i32 %add106 to i64
36  %arrayidx108 = getelementptr inbounds %struct.c_derived_tbl.2.5.8.11.14.17.23.38.59.80.92.98.104.107.155.183, %struct.c_derived_tbl.2.5.8.11.14.17.23.38.59.80.92.98.104.107.155.183* %actbl, i64 0, i32 0, i64 %idxprom107
37  %0 = load i32, i32* %arrayidx108, align 4
38  %arrayidx110 = getelementptr inbounds %struct.c_derived_tbl.2.5.8.11.14.17.23.38.59.80.92.98.104.107.155.183, %struct.c_derived_tbl.2.5.8.11.14.17.23.38.59.80.92.98.104.107.155.183* %actbl, i64 0, i32 1, i64 %idxprom107
39  %1 = load i8, i8* %arrayidx110, align 1
40  indirectbr i8* undef, [label %L_KLOOP_DONE, label %L_KLOOP_01, label %L_KLOOP_08, label %L_KLOOP]
41
42L_KLOOP_DONE:                                     ; preds = %while.end
43  ret void
44}
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