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Some distinct metadata nodes, e.g DICompileUnit, have implicit nullptrs inside them. Iterating over them with dyn_cast leads to a crash, change the behavior so that the nullptr operands are skipped. Add the test distinct-metadata-nullptr.ll which will crash if null pointers are not handled correctly.
18 lines
830 B
LLVM
18 lines
830 B
LLVM
; Test checking that distinct metadata reduction pass handles null pointers properly.
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; This test will lead to a crash if nullptrs inside distinct metadata are not handled correctly, in this case inside DICompileUnit
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; RUN: llvm-reduce --delta-passes=distinct-metadata --aggressive-named-md-reduction --test FileCheck --test-arg %s --test-arg --input-file %s -o %t
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; CHECK: {{.*}}distinct !DICompileUnit{{.*}}
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!llvm.module.flags = !{!0, !1, !6}
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!llvm.dbg.cu = !{!4}
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!0 = !{i32 7, !"Dwarf Version", i32 4}
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!1 = !{i32 2, !"Source Lang Literal", !2}
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!2 = !{!3}
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!3 = !{!4, i32 33}
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!4 = distinct !DICompileUnit(language: DW_LANG_OpenCL, file: !5, producer: "foobar", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
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!5 = !DIFile(filename: "main.cpp", directory: "foodir")
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!6 = !{i32 2, !"Debug Info Version", i32 3}
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