9811ffe7d0
Revision c383f4d6550e enabled using variadic-form debug values to represent single-location, non-stack-value debug values, and a further patch made all DBG_INSTR_REFs use variadic form. Not all code paths were updated correctly to handle the new syntax however, with entry values in still expecting an expression that begins exactly DW_OP_LLVM_entry_value, 1. A function already exists to select non-variadic-like expressions; this patch adds an extra function to cheaply simplify such cases to non-variadic form, which we use prior to any entry-value processing to put DBG_INSTR_REFs and DBG_VALUEs down the same code path. We also use it for a few DIExpression functions that check for whether the first element(s) of a DIExpression match a particular pattern, so that they will return the same result for DIExpression(DW_OP_LLVM_arg, 0, <ops>) as for DIExpression(<ops>). Differential Revision: https://reviews.llvm.org/D158185
34 lines
1.4 KiB
LLVM
34 lines
1.4 KiB
LLVM
; RUN: llc -mtriple=x86_64-unknown-linux-gnu -filetype=obj -o - %s \
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; RUN: | llvm-dwarfdump - \
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; RUN: | FileCheck %s
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; CHECK: DW_TAG_variable
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; CHECK-NOT: DW_AT_location
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; CHECK-NEXT: DW_AT_name ("arr")
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; CHECK-NOT: DW_AT_location
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; CHECK: DW_TAG
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define dso_local void @test() !dbg !4 {
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entry:
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call void @llvm.dbg.value(metadata !DIArgList(i128 0), metadata !7, metadata !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 0, DW_OP_plus, DW_OP_stack_value, DW_OP_LLVM_fragment, 0, 127)), !dbg !12
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ret void, !dbg !12
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}
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declare void @llvm.dbg.value(metadata, metadata, metadata)
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!2, !3}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, runtimeVersion: 0, emissionKind: FullDebug, splitDebugInlining: false, nameTableKind: None)
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!1 = !DIFile(filename: "test.c", directory: "")
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!2 = !{i32 7, !"Dwarf Version", i32 4}
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!3 = !{i32 2, !"Debug Info Version", i32 3}
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!4 = distinct !DISubprogram(name: "test", scope: !1, file: !1, line: 1, type: !5, unit: !0)
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!5 = !DISubroutineType(types: !6)
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!6 = !{null}
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!7 = !DILocalVariable(name: "arr", scope: !4, file: !1, line: 1, type: !8)
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!8 = !DICompositeType(tag: DW_TAG_array_type, baseType: !9, size: 128, elements: !10)
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!9 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)
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!10 = !{!11}
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!11 = !DISubrange(count: 16)
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!12 = !DILocation(line: 1, column: 1, scope: !4)
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