c383f4d655
Prior to this patch, variadic DIExpressions (i.e. ones that contain DW_OP_LLVM_arg) could only be created by salvaging debug values to create stack value expressions, resulting in a DBG_VALUE_LIST being created. As of the previous patch in this patch stack, DBG_INSTR_REF's syntax has been changed to match DBG_VALUE_LIST in preparation for supporting variadic expressions. This patch adds some minor changes needed to allow variadic expressions that aren't stack values to exist, and allows variadic expressions that are trivially reduceable to non-variadic expressions to be handled similarly to non-variadic expressions. Reviewed by: jmorse Differential Revision: https://reviews.llvm.org/D133926
104 lines
6.2 KiB
LLVM
104 lines
6.2 KiB
LLVM
; RUN: llc -start-after=codegenprepare -stop-before finalize-isel -o - %s \
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; RUN: -experimental-debug-variable-locations=false \
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; RUN: | FileCheck %s --check-prefixes=CHECK,DBGVALUE
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; RUN: llc -start-after=codegenprepare -stop-before finalize-isel -o - %s \
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; RUN: -experimental-debug-variable-locations=true \
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; RUN: | FileCheck %s --check-prefixes=CHECK,INSTRREF
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; This is a reproducer based on the test case from PR37321.
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; We verify that the fragment for the last DBG_VALUE is limited depending
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; on the size of the original fragment (and that we do not emit more
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; DBG_VALUE instructions than needed in case we cover the whole original
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; fragment with just a few DBG_VALUE instructions).
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; CHECK-LABEL: bb.{{.*}}.if.end36:
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; CHECK: [[REG1:%[0-9]+]]:gr32 = PHI
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; INSTRREF-SAME: debug-instr-number 1
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; CHECK-NEXT: [[REG2:%[0-9]+]]:gr32 = PHI
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; INSTRREF-SAME: debug-instr-number 2
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; CHECK-NEXT: [[REG3:%[0-9]+]]:gr32 = PHI
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; INSTRREF-SAME: debug-instr-number 3
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; INSTRREF-NEXT: DBG_INSTR_REF !13, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_fragment, 0, 32), dbg-instr-ref(1, 0)
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; INSTRREF-NEXT: DBG_INSTR_REF !13, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_fragment, 32, 32), dbg-instr-ref(2, 0)
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; INSTRREF-NEXT: DBG_INSTR_REF !13, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_fragment, 64, 16), dbg-instr-ref(3, 0)
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; INSTRREF-NEXT: DBG_INSTR_REF !12, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_fragment, 10, 32), dbg-instr-ref(1, 0)
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; INSTRREF-NEXT: DBG_INSTR_REF !12, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_fragment, 42, 13), dbg-instr-ref(2, 0)
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; DBGVALUE-NEXT: DBG_VALUE [[REG1]], $noreg, !13, !DIExpression(DW_OP_LLVM_fragment, 0, 32)
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; DBGVALUE-NEXT: DBG_VALUE [[REG2]], $noreg, !13, !DIExpression(DW_OP_LLVM_fragment, 32, 32)
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; DBGVALUE-NEXT: DBG_VALUE [[REG3]], $noreg, !13, !DIExpression(DW_OP_LLVM_fragment, 64, 16)
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; DBGVALUE-NEXT: DBG_VALUE [[REG1]], $noreg, !12, !DIExpression(DW_OP_LLVM_fragment, 10, 32)
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; DBGVALUE-NEXT: DBG_VALUE [[REG2]], $noreg, !12, !DIExpression(DW_OP_LLVM_fragment, 42, 13)
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; CHECK-NOT: DBG_
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target datalayout = "e-m:x-p:32:32-i64:64-f80:32-n8:16:32-a:0:32-S32"
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target triple = "i686-w64-windows-gnu"
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; Function Attrs: nounwind readnone
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define dso_local i64 @nextafterl(i80 %a) local_unnamed_addr #0 !dbg !6 {
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entry:
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br i1 undef, label %if.else, label %if.then13, !dbg !28
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if.then13: ; preds = %entry
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%u.sroa.0.8.insert.insert = or i80 %a, 2222, !dbg !29
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br label %if.end36, !dbg !33
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if.else: ; preds = %entry
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br label %if.end36
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if.end36: ; preds = %if.else, %if.then13
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%u.sroa.0.1.in = phi i80 [ %u.sroa.0.8.insert.insert, %if.then13 ], [ 1234567, %if.else ]
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call void @llvm.dbg.value(metadata i80 %u.sroa.0.1.in, metadata !13, metadata !DIExpression(DW_OP_LLVM_fragment, 0, 80)), !dbg !34
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call void @llvm.dbg.value(metadata i80 %u.sroa.0.1.in, metadata !12, metadata !DIExpression(DW_OP_LLVM_fragment, 10, 45)), !dbg !34
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%u.sroa.0.0.extract.ashr = ashr i80 %u.sroa.0.1.in, 8, !dbg !35
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%u.sroa.0.0.extract.trunc = trunc i80 %u.sroa.0.0.extract.ashr to i64, !dbg !35
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ret i64 %u.sroa.0.0.extract.trunc
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}
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; Function Attrs: nounwind readnone speculatable
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declare void @llvm.dbg.value(metadata, metadata, metadata) #1
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attributes #0 = { nounwind readnone }
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attributes #1 = { nounwind readnone speculatable }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!26, !27}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 7.0.0 (trunk 330808) (llvm/trunk 330813)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, globals: !3)
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!1 = !DIFile(filename: "pr37321.c", directory: "")
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!2 = !{}
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!3 = !{!4}
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!4 = !DIGlobalVariableExpression(var: !5, expr: !DIExpression())
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!5 = distinct !DIGlobalVariable(name: "normal_bit", scope: !6, file: !1, line: 31, type: !25, isLocal: true, isDefinition: true)
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!6 = distinct !DISubprogram(name: "nextafterl", scope: !1, file: !1, line: 17, type: !7, isLocal: false, isDefinition: true, scopeLine: 18, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !10)
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!7 = !DISubroutineType(types: !8)
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!8 = !{!9, !9, !9}
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!9 = !DIBasicType(name: "long double", size: 96, encoding: DW_ATE_float)
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!10 = !{!11, !12, !13}
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!11 = !DILocalVariable(name: "x", arg: 1, scope: !6, file: !1, line: 17, type: !9)
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!12 = !DILocalVariable(name: "y", arg: 2, scope: !6, file: !1, line: 17, type: !9)
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!13 = !DILocalVariable(name: "u", scope: !6, file: !1, line: 27, type: !14)
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!14 = distinct !DICompositeType(tag: DW_TAG_union_type, scope: !6, file: !1, line: 19, size: 128, elements: !15)
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!15 = !{!16, !17}
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!16 = !DIDerivedType(tag: DW_TAG_member, name: "ld", scope: !14, file: !1, line: 20, baseType: !9, size: 96)
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!17 = !DIDerivedType(tag: DW_TAG_member, name: "parts", scope: !14, file: !1, line: 26, baseType: !18, size: 128)
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!18 = distinct !DICompositeType(tag: DW_TAG_structure_type, scope: !14, file: !1, line: 21, size: 128, elements: !19)
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!19 = !{!20, !22, !24}
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!20 = !DIDerivedType(tag: DW_TAG_member, name: "mantissa", scope: !18, file: !1, line: 23, baseType: !21, size: 64)
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!21 = !DIBasicType(name: "long long unsigned int", size: 64, encoding: DW_ATE_unsigned)
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!22 = !DIDerivedType(tag: DW_TAG_member, name: "expn", scope: !18, file: !1, line: 24, baseType: !23, size: 16, offset: 64)
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!23 = !DIBasicType(name: "unsigned short", size: 16, encoding: DW_ATE_unsigned)
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!24 = !DIDerivedType(tag: DW_TAG_member, name: "pad", scope: !18, file: !1, line: 25, baseType: !23, size: 16, offset: 80)
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!25 = !DIDerivedType(tag: DW_TAG_const_type, baseType: !21)
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!26 = !{i32 2, !"Debug Info Version", i32 3}
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!27 = !{i32 1, !"wchar_size", i32 2}
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!28 = !DILocation(line: 47, column: 7, scope: !6)
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!29 = !DILocation(line: 51, column: 14, scope: !30)
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!30 = distinct !DILexicalBlock(scope: !31, file: !1, line: 50, column: 11)
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!31 = distinct !DILexicalBlock(scope: !32, file: !1, line: 48, column: 5)
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!32 = distinct !DILexicalBlock(scope: !6, file: !1, line: 47, column: 7)
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!33 = !DILocation(line: 51, column: 2, scope: !30)
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!34 = !DILocation(line: 27, column: 5, scope: !6)
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!35 = !DILocation(line: 63, column: 22, scope: !36)
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!36 = distinct !DILexicalBlock(scope: !6, file: !1, line: 62, column: 7)
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