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cf8ee33937
The "null-pointer-is-valid" attribute needs to be checked by many pointer-related combines. To make the check more efficient, convert it from a string into an enum attribute. In the future, this attribute may be replaced with data layout properties. Differential Revision: https://reviews.llvm.org/D78862
25 lines
1.1 KiB
LLVM
25 lines
1.1 KiB
LLVM
; RUN: opt -S -simplifycfg < %s | FileCheck %s
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define void @foo() nounwind ssp #0 !dbg !0 {
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; CHECK: store i32 42, i32* null
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; CHECK-NOT: call void @llvm.trap()
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; CHECK: ret void
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store i32 42, i32* null, !dbg !5
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ret void, !dbg !7
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}
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attributes #0 = { null_pointer_is_valid }
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!llvm.dbg.cu = !{!2}
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!llvm.module.flags = !{!10}
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!0 = distinct !DISubprogram(name: "foo", line: 3, isLocal: false, isDefinition: true, virtualIndex: 6, isOptimized: false, unit: !2, file: !8, scope: !1, type: !3)
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!1 = !DIFile(filename: "foo.c", directory: "/private/tmp")
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!2 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "Apple clang version 3.0 (tags/Apple/clang-206.1) (based on LLVM 3.0svn)", isOptimized: true, emissionKind: FullDebug, file: !8, enums: !{}, retainedTypes: !{})
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!3 = !DISubroutineType(types: !4)
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!4 = !{null}
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!5 = !DILocation(line: 4, column: 2, scope: !6)
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!6 = distinct !DILexicalBlock(line: 3, column: 12, file: !8, scope: !0)
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!7 = !DILocation(line: 5, column: 1, scope: !6)
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!8 = !DIFile(filename: "foo.c", directory: "/private/tmp")
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!10 = !{i32 1, !"Debug Info Version", i32 3}
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