forked from OSchip/llvm-project
45 lines
2.2 KiB
LLVM
45 lines
2.2 KiB
LLVM
; RUN: opt -S %s -value-tracking-dom-conditions -licm -load-combine | FileCheck %s
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; In pr24866.ll, we saw a crash when accessing a nullptr returned when
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; asking for a dominator tree Node. This reproducer is really fragile,
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; but it's currently the best we have.
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%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] }
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; Function Attrs: nounwind uwtable
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define 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 {
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; CHECK-LABEL: @encode_one_blockX2
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entry:
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br i1 false, label %L_KLOOP_01, label %L_KLOOP.preheader
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L_KLOOP_01: ; preds = %while.end, %entry
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br label %L_KLOOP.preheader
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L_KLOOP_08: ; preds = %while.end
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br label %L_KLOOP.preheader
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L_KLOOP.preheader: ; preds = %L_KLOOP_08, %L_KLOOP_01, %entry
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%r.2.ph = phi i32 [ undef, %L_KLOOP_08 ], [ 0, %entry ], [ undef, %L_KLOOP_01 ]
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br label %L_KLOOP
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L_KLOOP: ; preds = %while.end, %L_KLOOP.preheader
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%r.2 = phi i32 [ 0, %while.end ], [ %r.2.ph, %L_KLOOP.preheader ]
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br i1 true, label %while.body, label %while.end
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while.body: ; preds = %while.body, %L_KLOOP
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br label %while.body
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while.end: ; preds = %L_KLOOP
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%shl105 = shl i32 %r.2, 4
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%add106 = add nsw i32 %shl105, undef
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%idxprom107 = sext i32 %add106 to i64
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%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
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%0 = load i32, i32* %arrayidx108, align 4
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%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
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%1 = load i8, i8* %arrayidx110, align 1
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indirectbr i8* undef, [label %L_KLOOP_DONE, label %L_KLOOP_01, label %L_KLOOP_08, label %L_KLOOP]
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L_KLOOP_DONE: ; preds = %while.end
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ret void
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}
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