[llvm] r331464 - Reapply "[SelectionDAG] Selection of DBG_VALUE using a PHI node result (pt 2)"
Bjorn Pettersson via llvm-commits
llvm-commits at lists.llvm.org
Thu May 3 10:04:17 PDT 2018
Author: bjope
Date: Thu May 3 10:04:16 2018
New Revision: 331464
URL: http://llvm.org/viewvc/llvm-project?rev=331464&view=rev
Log:
Reapply "[SelectionDAG] Selection of DBG_VALUE using a PHI node result (pt 2)"
Summary:
This reverts SVN r331441 (reapplies r331337), together with a fix
in to handle an already existing fragment expression in the
dbg.value that must be fragmented due to a split PHI node.
This should solve the problem seen in PR37321, which was the
reason for the revert of r331337.
The situation in PR37321 is that we have a PHI node like this
%u.sroa = phi i80 [ %u.sroa.x, %if.x ],
[ %u.sroa.y, %if.y ],
[ %u.sroa.z, %if.z ]
and a dbg.value like this
call void @llvm.dbg.value(metadata i80 %u.sroa,
metadata !13,
metadata !DIExpression(DW_OP_LLVM_fragment, 0, 80))
The phi node is split into three 32-bit PHI nodes
%30:gr32 = PHI %11:gr32, %bb.4, %14:gr32, %bb.5, %27:gr32, %bb.8
%31:gr32 = PHI %12:gr32, %bb.4, %15:gr32, %bb.5, %28:gr32, %bb.8
%32:gr32 = PHI %13:gr32, %bb.4, %16:gr32, %bb.5, %29:gr32, %bb.8
but since the original value only is 80 bits we need to adjust the size
of the last fragment expression, and with this patch we get
DBG_VALUE debug-use %30:gr32, debug-use $noreg, !"u", !DIExpression(DW_OP_LLVM_fragment, 0, 32)
DBG_VALUE debug-use %31:gr32, debug-use $noreg, !"u", !DIExpression(DW_OP_LLVM_fragment, 32, 32)
DBG_VALUE debug-use %32:gr32, debug-use $noreg, !"u", !DIExpression(DW_OP_LLVM_fragment, 64, 16)
Reviewers: vsk, aprantl, mstorsjo
Reviewed By: aprantl
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D46384
Added:
llvm/trunk/test/DebugInfo/X86/sdag-dbgvalue-phi-use-3.ll
llvm/trunk/test/DebugInfo/X86/sdag-dbgvalue-phi-use-4.ll
Modified:
llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h
Modified: llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp?rev=331464&r1=331463&r2=331464&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp (original)
+++ llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp Thu May 3 10:04:16 2018
@@ -5257,12 +5257,48 @@ SelectionDAGBuilder::visitIntrinsicCall(
// PHI nodes have already been selected, so we should know which VReg that
// is assigns to already.
if (isa<PHINode>(V)) {
- auto It = FuncInfo.ValueMap.find(V);
- if (It != FuncInfo.ValueMap.end()) {
- unsigned Reg = It->second;
- SDV = DAG.getVRegDbgValue(Variable, Expression, Reg, false, dl,
- SDNodeOrder);
- DAG.AddDbgValue(SDV, nullptr, false);
+ auto VMI = FuncInfo.ValueMap.find(V);
+ if (VMI != FuncInfo.ValueMap.end()) {
+ unsigned Reg = VMI->second;
+ // The PHI node may be split up into several MI PHI nodes (in
+ // FunctionLoweringInfo::set).
+ RegsForValue RFV(V->getContext(), TLI, DAG.getDataLayout(), Reg,
+ V->getType(), false);
+ if (RFV.occupiesMultipleRegs()) {
+ unsigned I = 0;
+ unsigned Offset = 0;
+ unsigned BitsToDescribe = 0;
+ if (auto VarSize = Variable->getSizeInBits())
+ BitsToDescribe = *VarSize;
+ if (auto Fragment = Expression->getFragmentInfo())
+ BitsToDescribe = Fragment->SizeInBits;
+ for (auto CountAndVT : zip_first(RFV.RegCount, RFV.RegVTs)) {
+ unsigned RegCount = std::get<0>(CountAndVT);
+ MVT RegisterVT = std::get<1>(CountAndVT);
+ unsigned RegisterSize = RegisterVT.getSizeInBits();
+ for (unsigned E = I + RegCount; I != E; ++I) {
+ // Bail out if all bits already are described.
+ if (Offset >= BitsToDescribe)
+ break;
+ unsigned FragmentSize = (Offset + RegisterSize > BitsToDescribe)
+ ? BitsToDescribe - Offset
+ : RegisterSize;
+ auto FragmentExpr = DIExpression::createFragmentExpression(
+ Expression, Offset, FragmentSize);
+ if (!FragmentExpr)
+ continue;
+ // The vregs are guaranteed to be allocated in sequence.
+ SDV = DAG.getVRegDbgValue(Variable, *FragmentExpr, Reg + I,
+ false, dl, SDNodeOrder);
+ DAG.AddDbgValue(SDV, nullptr, false);
+ Offset += RegisterSize;
+ }
+ }
+ } else {
+ SDV = DAG.getVRegDbgValue(Variable, Expression, Reg, false, dl,
+ SDNodeOrder);
+ DAG.AddDbgValue(SDV, nullptr, false);
+ }
return nullptr;
}
}
Modified: llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h?rev=331464&r1=331463&r2=331464&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h (original)
+++ llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h Thu May 3 10:04:16 2018
@@ -1048,6 +1048,11 @@ struct RegsForValue {
void AddInlineAsmOperands(unsigned Kind, bool HasMatching,
unsigned MatchingIdx, const SDLoc &dl,
SelectionDAG &DAG, std::vector<SDValue> &Ops) const;
+
+ /// Check if the total RegCount is greater than one.
+ bool occupiesMultipleRegs() const {
+ return std::accumulate(RegCount.begin(), RegCount.end(), 0) > 1;
+ }
};
} // end namespace llvm
Added: llvm/trunk/test/DebugInfo/X86/sdag-dbgvalue-phi-use-3.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/DebugInfo/X86/sdag-dbgvalue-phi-use-3.ll?rev=331464&view=auto
==============================================================================
--- llvm/trunk/test/DebugInfo/X86/sdag-dbgvalue-phi-use-3.ll (added)
+++ llvm/trunk/test/DebugInfo/X86/sdag-dbgvalue-phi-use-3.ll Thu May 3 10:04:16 2018
@@ -0,0 +1,169 @@
+; RUN: llc -start-after=codegenprepare -stop-before expand-isel-pseudos -o - %s | FileCheck %s
+
+; This test case was generated from the following phi-split.c program,
+; using: clang phi-split.c -g -O1 -S -o - --target=i386 -emit-llvm
+; --------------------------------------
+; long long end = 10;
+;
+; int main() {
+; long long x = 9;
+; long long y = 13;
+; for (long long u = 0; u < end; ++u) {
+; x += y;
+; y = y * 3;
+; }
+;
+; volatile long long arr[80];
+; for (long long q = 0; q < 64; ++q) {
+; arr[q] = q + 3;
+; }
+;
+; return x;
+; }
+; --------------------------------------
+;
+
+; ModuleID = 'phi-split.c'
+source_filename = "phi-split.c"
+target datalayout = "e-m:e-p:32:32-f64:32:64-f80:32-n8:16:32-S128"
+target triple = "i386"
+
+ at end = dso_local local_unnamed_addr global i64 10, align 8, !dbg !0
+
+; Function Attrs: nounwind
+define dso_local i32 @main() local_unnamed_addr #0 !dbg !12 {
+; CHECK-LABEL: name: main
+entry:
+ %arr = alloca [80 x i64], align 8
+ call void @llvm.dbg.value(metadata i64 9, metadata !17, metadata !DIExpression()), !dbg !28
+ call void @llvm.dbg.value(metadata i64 13, metadata !18, metadata !DIExpression()), !dbg !29
+ call void @llvm.dbg.value(metadata i64 0, metadata !19, metadata !DIExpression()), !dbg !30
+ %0 = load i64, i64* @end, align 8, !dbg !31
+ %cmp20 = icmp sgt i64 %0, 0, !dbg !37
+ br i1 %cmp20, label %for.body.lr.ph, label %for.cond.cleanup, !dbg !38
+
+for.body.lr.ph: ; preds = %entry
+ %1 = load i64, i64* @end, align 8
+ br label %for.body, !dbg !38
+
+for.cond.cleanup.loopexit: ; preds = %for.body
+ %extract.t = trunc i64 %add to i32, !dbg !38
+ br label %for.cond.cleanup, !dbg !39
+
+for.cond.cleanup: ; preds = %for.cond.cleanup.loopexit, %entry
+ %x.0.lcssa.off0 = phi i32 [ 9, %entry ], [ %extract.t, %for.cond.cleanup.loopexit ]
+ call void @llvm.dbg.value(metadata i64 undef, metadata !17, metadata !DIExpression()), !dbg !28
+ %2 = bitcast [80 x i64]* %arr to i8*, !dbg !39
+ call void @llvm.dbg.value(metadata i64 0, metadata !26, metadata !DIExpression()), !dbg !41
+ br label %for.body4, !dbg !42
+
+for.body: ; preds = %for.body.lr.ph, %for.body
+; CHECK-LABEL: bb.{{.*}}.for.body:
+; CHECK: [[REG2:%[0-9]+]]:gr32 = PHI
+; CHECK-NEXT: [[REG3:%[0-9]+]]:gr32 = PHI
+; CHECK-NEXT: [[REG4:%[0-9]+]]:gr32 = PHI
+; CHECK-NEXT: [[REG5:%[0-9]+]]:gr32_nosp = PHI
+; CHECK-NEXT: [[REG6:%[0-9]+]]:gr32 = PHI
+; CHECK-NEXT: [[REG7:%[0-9]+]]:gr32 = PHI
+; CHECK-NEXT: DBG_VALUE debug-use [[REG2]], debug-use $noreg, !19, !DIExpression(DW_OP_LLVM_fragment, 0, 32)
+; CHECK-NEXT: DBG_VALUE debug-use [[REG3]], debug-use $noreg, !19, !DIExpression(DW_OP_LLVM_fragment, 32, 32)
+; CHECK-NEXT: DBG_VALUE debug-use [[REG4]], debug-use $noreg, !18, !DIExpression(DW_OP_LLVM_fragment, 0, 32)
+; CHECK-NEXT: DBG_VALUE debug-use [[REG5]], debug-use $noreg, !18, !DIExpression(DW_OP_LLVM_fragment, 32, 32)
+; CHECK-NEXT: DBG_VALUE debug-use [[REG6]], debug-use $noreg, !17, !DIExpression(DW_OP_LLVM_fragment, 0, 32)
+; CHECK-NEXT: DBG_VALUE debug-use [[REG7]], debug-use $noreg, !17, !DIExpression(DW_OP_LLVM_fragment, 32, 32)
+ %u.023 = phi i64 [ 0, %for.body.lr.ph ], [ %inc, %for.body ]
+ %y.022 = phi i64 [ 13, %for.body.lr.ph ], [ %mul, %for.body ]
+ %x.021 = phi i64 [ 9, %for.body.lr.ph ], [ %add, %for.body ]
+ call void @llvm.dbg.value(metadata i64 %u.023, metadata !19, metadata !DIExpression()), !dbg !30
+ call void @llvm.dbg.value(metadata i64 %y.022, metadata !18, metadata !DIExpression()), !dbg !29
+ call void @llvm.dbg.value(metadata i64 %x.021, metadata !17, metadata !DIExpression()), !dbg !28
+ %add = add nuw nsw i64 %y.022, %x.021, !dbg !43
+ %mul = mul nsw i64 %y.022, 3, !dbg !45
+ %inc = add nuw nsw i64 %u.023, 1, !dbg !46
+ call void @llvm.dbg.value(metadata i64 %inc, metadata !19, metadata !DIExpression()), !dbg !30
+ call void @llvm.dbg.value(metadata i64 %mul, metadata !18, metadata !DIExpression()), !dbg !29
+ call void @llvm.dbg.value(metadata i64 %add, metadata !17, metadata !DIExpression()), !dbg !28
+ %cmp = icmp slt i64 %inc, %1, !dbg !37
+ br i1 %cmp, label %for.body, label %for.cond.cleanup.loopexit, !dbg !38, !llvm.loop !47
+
+for.cond.cleanup3: ; preds = %for.body4
+ ret i32 %x.0.lcssa.off0, !dbg !50
+
+for.body4: ; preds = %for.cond.cleanup, %for.body4
+ %q.019 = phi i64 [ 0, %for.cond.cleanup ], [ %inc7, %for.body4 ]
+ call void @llvm.dbg.value(metadata i64 %q.019, metadata !26, metadata !DIExpression()), !dbg !41
+ %add5 = add nuw nsw i64 %q.019, 3, !dbg !51
+ %idxprom = trunc i64 %q.019 to i32, !dbg !54
+ %arrayidx = getelementptr inbounds [80 x i64], [80 x i64]* %arr, i32 0, i32 %idxprom, !dbg !54
+ store volatile i64 %add5, i64* %arrayidx, align 8, !dbg !55
+ %inc7 = add nuw nsw i64 %q.019, 1, !dbg !56
+ call void @llvm.dbg.value(metadata i64 %inc7, metadata !26, metadata !DIExpression()), !dbg !41
+ %cmp2 = icmp ult i64 %inc7, 64, !dbg !57
+ br i1 %cmp2, label %for.body4, label %for.cond.cleanup3, !dbg !42, !llvm.loop !58
+}
+
+; Function Attrs: nounwind readnone speculatable
+declare void @llvm.dbg.value(metadata, metadata, metadata) #1
+
+attributes #0 = { nounwind }
+attributes #1 = { nounwind readnone speculatable }
+
+!llvm.dbg.cu = !{!2}
+!llvm.module.flags = !{!7, !8, !9, !10}
+!llvm.ident = !{!11}
+
+!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
+!1 = distinct !DIGlobalVariable(name: "end", scope: !2, file: !3, line: 1, type: !6, isLocal: false, isDefinition: true)
+!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 7.0.0 (x)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5)
+!3 = !DIFile(filename: "phi-split.c", directory: "")
+!4 = !{}
+!5 = !{!0}
+!6 = !DIBasicType(name: "long long int", size: 64, encoding: DW_ATE_signed)
+!7 = !{i32 1, !"NumRegisterParameters", i32 0}
+!8 = !{i32 2, !"Dwarf Version", i32 4}
+!9 = !{i32 2, !"Debug Info Version", i32 3}
+!10 = !{i32 1, !"wchar_size", i32 4}
+!11 = !{!"clang version 7.0.0 (x)"}
+!12 = distinct !DISubprogram(name: "main", scope: !3, file: !3, line: 3, type: !13, isLocal: false, isDefinition: true, scopeLine: 3, isOptimized: true, unit: !2, variables: !16)
+!13 = !DISubroutineType(types: !14)
+!14 = !{!15}
+!15 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
+!16 = !{!17, !18, !19, !21, !26}
+!17 = !DILocalVariable(name: "x", scope: !12, file: !3, line: 4, type: !6)
+!18 = !DILocalVariable(name: "y", scope: !12, file: !3, line: 5, type: !6)
+!19 = !DILocalVariable(name: "u", scope: !20, file: !3, line: 6, type: !6)
+!20 = distinct !DILexicalBlock(scope: !12, file: !3, line: 6, column: 3)
+!21 = !DILocalVariable(name: "arr", scope: !12, file: !3, line: 11, type: !22)
+!22 = !DICompositeType(tag: DW_TAG_array_type, baseType: !23, size: 5120, elements: !24)
+!23 = !DIDerivedType(tag: DW_TAG_volatile_type, baseType: !6)
+!24 = !{!25}
+!25 = !DISubrange(count: 80)
+!26 = !DILocalVariable(name: "q", scope: !27, file: !3, line: 12, type: !6)
+!27 = distinct !DILexicalBlock(scope: !12, file: !3, line: 12, column: 3)
+!28 = !DILocation(line: 4, column: 13, scope: !12)
+!29 = !DILocation(line: 5, column: 13, scope: !12)
+!30 = !DILocation(line: 6, column: 18, scope: !20)
+!31 = !DILocation(line: 6, column: 29, scope: !32)
+!32 = distinct !DILexicalBlock(scope: !20, file: !3, line: 6, column: 3)
+!37 = !DILocation(line: 6, column: 27, scope: !32)
+!38 = !DILocation(line: 6, column: 3, scope: !20)
+!39 = !DILocation(line: 11, column: 3, scope: !12)
+!40 = !DILocation(line: 11, column: 22, scope: !12)
+!41 = !DILocation(line: 12, column: 18, scope: !27)
+!42 = !DILocation(line: 12, column: 3, scope: !27)
+!43 = !DILocation(line: 7, column: 7, scope: !44)
+!44 = distinct !DILexicalBlock(scope: !32, file: !3, line: 6, column: 39)
+!45 = !DILocation(line: 8, column: 11, scope: !44)
+!46 = !DILocation(line: 6, column: 34, scope: !32)
+!47 = distinct !{!47, !38, !48}
+!48 = !DILocation(line: 9, column: 3, scope: !20)
+!50 = !DILocation(line: 16, column: 3, scope: !12)
+!51 = !DILocation(line: 13, column: 16, scope: !52)
+!52 = distinct !DILexicalBlock(scope: !53, file: !3, line: 12, column: 38)
+!53 = distinct !DILexicalBlock(scope: !27, file: !3, line: 12, column: 3)
+!54 = !DILocation(line: 13, column: 5, scope: !52)
+!55 = !DILocation(line: 13, column: 12, scope: !52)
+!56 = !DILocation(line: 12, column: 33, scope: !53)
+!57 = !DILocation(line: 12, column: 27, scope: !53)
+!58 = distinct !{!58, !42, !59}
+!59 = !DILocation(line: 14, column: 3, scope: !27)
Added: llvm/trunk/test/DebugInfo/X86/sdag-dbgvalue-phi-use-4.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/DebugInfo/X86/sdag-dbgvalue-phi-use-4.ll?rev=331464&view=auto
==============================================================================
--- llvm/trunk/test/DebugInfo/X86/sdag-dbgvalue-phi-use-4.ll (added)
+++ llvm/trunk/test/DebugInfo/X86/sdag-dbgvalue-phi-use-4.ll Thu May 3 10:04:16 2018
@@ -0,0 +1,90 @@
+; RUN: llc -start-after=codegenprepare -stop-before expand-isel-pseudos -o - %s | FileCheck %s
+
+; This is a reproducer based on the test case from PR37321.
+
+; We verify that the fragment for the last DBG_VALUE is limited depending
+; on the size of the original fragment (and that we do not emit more
+; DBG_VALUE instructions than needed in case we cover the whole original
+; fragment with just a few DBG_VALUE instructions).
+
+; CHECK-LABEL: bb.{{.*}}.if.end36:
+; CHECK: [[REG1:%[0-9]+]]:gr32 = PHI
+; CHECK-NEXT: [[REG2:%[0-9]+]]:gr32 = PHI
+; CHECK-NEXT: [[REG3:%[0-9]+]]:gr32 = PHI
+; CHECK-NEXT: DBG_VALUE debug-use [[REG1]], debug-use $noreg, !13, !DIExpression(DW_OP_LLVM_fragment, 0, 32)
+; CHECK-NEXT: DBG_VALUE debug-use [[REG2]], debug-use $noreg, !13, !DIExpression(DW_OP_LLVM_fragment, 32, 32)
+; CHECK-NEXT: DBG_VALUE debug-use [[REG3]], debug-use $noreg, !13, !DIExpression(DW_OP_LLVM_fragment, 64, 16)
+; CHECK-NEXT: DBG_VALUE debug-use [[REG1]], debug-use $noreg, !12, !DIExpression(DW_OP_LLVM_fragment, 10, 32)
+; CHECK-NEXT: DBG_VALUE debug-use [[REG2]], debug-use $noreg, !12, !DIExpression(DW_OP_LLVM_fragment, 42, 13)
+; CHECK-NOT: DBG_VALUE
+
+target datalayout = "e-m:x-p:32:32-i64:64-f80:32-n8:16:32-a:0:32-S32"
+target triple = "i686-w64-windows-gnu"
+
+; Function Attrs: nounwind readnone
+define dso_local i64 @nextafterl(i80 %a) local_unnamed_addr #0 !dbg !6 {
+entry:
+ br i1 undef, label %if.else, label %if.then13, !dbg !28
+
+if.then13: ; preds = %entry
+ %u.sroa.0.8.insert.insert = or i80 %a, 2222, !dbg !29
+ br label %if.end36, !dbg !33
+
+if.else: ; preds = %entry
+ br label %if.end36
+
+if.end36: ; preds = %if.else, %if.then13
+ %u.sroa.0.1.in = phi i80 [ %u.sroa.0.8.insert.insert, %if.then13 ], [ 1234567, %if.else ]
+ call void @llvm.dbg.value(metadata i80 %u.sroa.0.1.in, metadata !13, metadata !DIExpression(DW_OP_LLVM_fragment, 0, 80)), !dbg !34
+ call void @llvm.dbg.value(metadata i80 %u.sroa.0.1.in, metadata !12, metadata !DIExpression(DW_OP_LLVM_fragment, 10, 45)), !dbg !34
+ %u.sroa.0.0.extract.ashr = ashr i80 %u.sroa.0.1.in, 8, !dbg !35
+ %u.sroa.0.0.extract.trunc = trunc i80 %u.sroa.0.0.extract.ashr to i64, !dbg !35
+ ret i64 %u.sroa.0.0.extract.trunc
+}
+
+; Function Attrs: nounwind readnone speculatable
+declare void @llvm.dbg.value(metadata, metadata, metadata) #1
+
+attributes #0 = { nounwind readnone }
+attributes #1 = { nounwind readnone speculatable }
+
+!llvm.dbg.cu = !{!0}
+!llvm.module.flags = !{!26, !27}
+
+!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)
+!1 = !DIFile(filename: "pr37321.c", directory: "")
+!2 = !{}
+!3 = !{!4}
+!4 = !DIGlobalVariableExpression(var: !5, expr: !DIExpression())
+!5 = distinct !DIGlobalVariable(name: "normal_bit", scope: !6, file: !1, line: 31, type: !25, isLocal: true, isDefinition: true)
+!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, variables: !10)
+!7 = !DISubroutineType(types: !8)
+!8 = !{!9, !9, !9}
+!9 = !DIBasicType(name: "long double", size: 96, encoding: DW_ATE_float)
+!10 = !{!11, !12, !13}
+!11 = !DILocalVariable(name: "x", arg: 1, scope: !6, file: !1, line: 17, type: !9)
+!12 = !DILocalVariable(name: "y", arg: 2, scope: !6, file: !1, line: 17, type: !9)
+!13 = !DILocalVariable(name: "u", scope: !6, file: !1, line: 27, type: !14)
+!14 = distinct !DICompositeType(tag: DW_TAG_union_type, scope: !6, file: !1, line: 19, size: 128, elements: !15)
+!15 = !{!16, !17}
+!16 = !DIDerivedType(tag: DW_TAG_member, name: "ld", scope: !14, file: !1, line: 20, baseType: !9, size: 96)
+!17 = !DIDerivedType(tag: DW_TAG_member, name: "parts", scope: !14, file: !1, line: 26, baseType: !18, size: 128)
+!18 = distinct !DICompositeType(tag: DW_TAG_structure_type, scope: !14, file: !1, line: 21, size: 128, elements: !19)
+!19 = !{!20, !22, !24}
+!20 = !DIDerivedType(tag: DW_TAG_member, name: "mantissa", scope: !18, file: !1, line: 23, baseType: !21, size: 64)
+!21 = !DIBasicType(name: "long long unsigned int", size: 64, encoding: DW_ATE_unsigned)
+!22 = !DIDerivedType(tag: DW_TAG_member, name: "expn", scope: !18, file: !1, line: 24, baseType: !23, size: 16, offset: 64)
+!23 = !DIBasicType(name: "unsigned short", size: 16, encoding: DW_ATE_unsigned)
+!24 = !DIDerivedType(tag: DW_TAG_member, name: "pad", scope: !18, file: !1, line: 25, baseType: !23, size: 16, offset: 80)
+!25 = !DIDerivedType(tag: DW_TAG_const_type, baseType: !21)
+!26 = !{i32 2, !"Debug Info Version", i32 3}
+!27 = !{i32 1, !"wchar_size", i32 2}
+!28 = !DILocation(line: 47, column: 7, scope: !6)
+!29 = !DILocation(line: 51, column: 14, scope: !30)
+!30 = distinct !DILexicalBlock(scope: !31, file: !1, line: 50, column: 11)
+!31 = distinct !DILexicalBlock(scope: !32, file: !1, line: 48, column: 5)
+!32 = distinct !DILexicalBlock(scope: !6, file: !1, line: 47, column: 7)
+!33 = !DILocation(line: 51, column: 2, scope: !30)
+!34 = !DILocation(line: 27, column: 5, scope: !6)
+!35 = !DILocation(line: 63, column: 22, scope: !36)
+!36 = distinct !DILexicalBlock(scope: !6, file: !1, line: 62, column: 7)
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