[llvm] r360101 - Fix bug in getCompleteTypeIndex in codeview debug info
Amy Huang via llvm-commits
llvm-commits at lists.llvm.org
Mon May 6 16:37:03 PDT 2019
Author: akhuang
Date: Mon May 6 16:37:03 2019
New Revision: 360101
URL: http://llvm.org/viewvc/llvm-project?rev=360101&view=rev
Log:
Fix bug in getCompleteTypeIndex in codeview debug info
Summary:
When there are multiple instances of a forward decl record type, only the first one is emitted with a type index, because
the type is added to a map with a null type index. Avoid this by reordering so that forward decl types aren't added to the map.
Reviewers: rnk
Subscribers: aprantl, hiraditya, arphaman, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D61460
Modified:
llvm/trunk/lib/CodeGen/AsmPrinter/CodeViewDebug.cpp
llvm/trunk/test/CodeGen/X86/label-heapallocsite.ll
Modified: llvm/trunk/lib/CodeGen/AsmPrinter/CodeViewDebug.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/AsmPrinter/CodeViewDebug.cpp?rev=360101&r1=360100&r2=360101&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/AsmPrinter/CodeViewDebug.cpp (original)
+++ llvm/trunk/lib/CodeGen/AsmPrinter/CodeViewDebug.cpp Mon May 6 16:37:03 2019
@@ -2497,11 +2497,7 @@ TypeIndex CodeViewDebug::getCompleteType
return getTypeIndex(Ty);
}
- // Check if we've already translated the complete record type.
const auto *CTy = cast<DICompositeType>(Ty);
- auto InsertResult = CompleteTypeIndices.insert({CTy, TypeIndex()});
- if (!InsertResult.second)
- return InsertResult.first->second;
TypeLoweringScope S(*this);
@@ -2519,6 +2515,13 @@ TypeIndex CodeViewDebug::getCompleteType
return FwdDeclTI;
}
+ // Check if we've already translated the complete record type.
+ // Insert the type with a null TypeIndex to signify that the type is currently
+ // being lowered.
+ auto InsertResult = CompleteTypeIndices.insert({CTy, TypeIndex()});
+ if (!InsertResult.second)
+ return InsertResult.first->second;
+
TypeIndex TI;
switch (CTy->getTag()) {
case dwarf::DW_TAG_class_type:
Modified: llvm/trunk/test/CodeGen/X86/label-heapallocsite.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/X86/label-heapallocsite.ll?rev=360101&r1=360100&r2=360101&view=diff
==============================================================================
--- llvm/trunk/test/CodeGen/X86/label-heapallocsite.ll (original)
+++ llvm/trunk/test/CodeGen/X86/label-heapallocsite.ll Mon May 6 16:37:03 2019
@@ -2,20 +2,24 @@
; FIXME: Add test for llc with optimizations once it is implemented.
; Source to regenerate:
-; $ clang --target=x86_64-windows-msvc -S heapallocsite.c -g -gcodeview -o t.ll \
+; $ clang --target=x86_64-windows-msvc -S heapallocsite.cpp -g -gcodeview -o t.ll \
; -emit-llvm -O0 -Xclang -disable-llvm-passes -fms-extensions
-; __declspec(allocator) char *myalloc(void);
-; void f() {
-; myalloc()
-; }
;
; struct Foo {
; __declspec(allocator) virtual void *alloc();
; };
-; void use_alloc(void*);
-; void do_alloc(Foo *p) {
+;
+; extern "C" __declspec(allocator) Foo *alloc_foo();
+;
+; extern "C" void use_alloc(void*);
+; extern "C" void call_virtual(Foo *p) {
; use_alloc(p->alloc());
; }
+;
+; extern "C" void call_multiple() {
+; use_alloc(alloc_foo());
+; use_alloc(alloc_foo());
+; }
target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-windows-msvc"
@@ -23,39 +27,52 @@ target triple = "x86_64-unknown-windows-
%struct.Foo = type { i32 (...)** }
; Function Attrs: noinline optnone uwtable
-define dso_local void @f() #0 !dbg !8 {
+define dso_local void @call_virtual(%struct.Foo* %p) #0 !dbg !8 {
entry:
- %call = call i8* @myalloc(), !dbg !11, !heapallocsite !2
- ret void, !dbg !12
+ %p.addr = alloca %struct.Foo*, align 8
+ store %struct.Foo* %p, %struct.Foo** %p.addr, align 8
+ call void @llvm.dbg.declare(metadata %struct.Foo** %p.addr, metadata !13, metadata !DIExpression()), !dbg !14
+ %0 = load %struct.Foo*, %struct.Foo** %p.addr, align 8, !dbg !15
+ %1 = bitcast %struct.Foo* %0 to i8* (%struct.Foo*)***, !dbg !15
+ %vtable = load i8* (%struct.Foo*)**, i8* (%struct.Foo*)*** %1, align 8, !dbg !15
+ %vfn = getelementptr inbounds i8* (%struct.Foo*)*, i8* (%struct.Foo*)** %vtable, i64 0, !dbg !15
+ %2 = load i8* (%struct.Foo*)*, i8* (%struct.Foo*)** %vfn, align 8, !dbg !15
+ %call = call i8* %2(%struct.Foo* %0), !dbg !15, !heapallocsite !2
+ call void @use_alloc(i8* %call), !dbg !15
+ ret void, !dbg !16
}
-; CHECK-LABEL: f: # @f
-; CHECK: .Lheapallocsite0:
-; CHECK: callq myalloc
-; CHECK: .Lheapallocsite1:
-; CHECK: retq
+; Function Attrs: nounwind readnone speculatable
+declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
-declare dso_local i8* @myalloc() #1
+declare dso_local void @use_alloc(i8*) #2
; Function Attrs: noinline optnone uwtable
-define dso_local void @do_alloc(%struct.Foo* %p) #0 !dbg !13 {
+define dso_local void @call_multiple() #0 !dbg !17 {
entry:
- %p.addr = alloca %struct.Foo*, align 8
- store %struct.Foo* %p, %struct.Foo** %p.addr, align 8
- call void @llvm.dbg.declare(metadata %struct.Foo** %p.addr, metadata !18, metadata !DIExpression()), !dbg !19
- %0 = load %struct.Foo*, %struct.Foo** %p.addr, align 8, !dbg !20
- %1 = bitcast %struct.Foo* %0 to i8* (%struct.Foo*)***, !dbg !20
- %vtable = load i8* (%struct.Foo*)**, i8* (%struct.Foo*)*** %1, align 8, !dbg !20
- %vfn = getelementptr inbounds i8* (%struct.Foo*)*, i8* (%struct.Foo*)** %vtable, i64 0, !dbg !20
- %2 = load i8* (%struct.Foo*)*, i8* (%struct.Foo*)** %vfn, align 8, !dbg !20
- %call = call i8* %2(%struct.Foo* %0), !dbg !20, !heapallocsite !2
- call void @use_alloc(i8* %call), !dbg !20
- ret void, !dbg !21
+ %call = call %struct.Foo* @alloc_foo(), !dbg !20, !heapallocsite !12
+ %0 = bitcast %struct.Foo* %call to i8*, !dbg !20
+ call void @use_alloc(i8* %0), !dbg !20
+ %call1 = call %struct.Foo* @alloc_foo(), !dbg !21, !heapallocsite !12
+ %1 = bitcast %struct.Foo* %call1 to i8*, !dbg !21
+ call void @use_alloc(i8* %1), !dbg !21
+ ret void, !dbg !22
}
-; CHECK-LABEL: do_alloc: # @do_alloc
-; CHECK: .Lheapallocsite2:
+declare dso_local %struct.Foo* @alloc_foo() #2
+
+; CHECK-LABEL: call_virtual: # @call_virtual
+; CHECK: .Lheapallocsite0:
; CHECK: callq *(%rax)
+; CHECK: .Lheapallocsite1:
+; CHECK: retq
+
+; CHECK-LABEL: call_multiple: # @call_multiple
+; CHECK: .Lheapallocsite4:
+; CHECK: callq alloc_foo
+; CHECK: .Lheapallocsite5:
+; CHECK: .Lheapallocsite2:
+; CHECK: callq alloc_foo
; CHECK: .Lheapallocsite3:
; CHECK: retq
@@ -73,39 +90,40 @@ entry:
; CHECK-NEXT: .secrel32 .Lheapallocsite2
; CHECK-NEXT: .secidx .Lheapallocsite2
; CHECK-NEXT: .short .Lheapallocsite3-.Lheapallocsite2
-; CHECK-NEXT: .long 3
+; CHECK-NEXT: .long 4096
; CHECK-NEXT: .p2align 2
-; CHECK-LABEL: .short 4431 # Record kind: S_PROC_ID_END
-
-; Function Attrs: nounwind readnone speculatable
-declare void @llvm.dbg.declare(metadata, metadata, metadata) #2
-declare dso_local void @use_alloc(i8*) #1
+; CHECK: .short 4446 # Record kind: S_HEAPALLOCSITE
+; CHECK-NEXT: .secrel32 .Lheapallocsite4
+; CHECK-NEXT: .secidx .Lheapallocsite4
+; CHECK-NEXT: .short .Lheapallocsite5-.Lheapallocsite4
+; CHECK-NEXT: .long 4096
+; CHECK-NEXT: .p2align 2
+; CHECK-LABEL: .short 4431 # Record kind: S_PROC_ID_END
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!3, !4, !5, !6}
!llvm.ident = !{!7}
-!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 9.0.0 (https://github.com/llvm/llvm-project.git 4eff3de99423a62fd6e833e29c71c1e62ba6140b)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: None)
-!1 = !DIFile(filename: "heapallocsite.cpp", directory: "C:\5Csrc\5Ctest", checksumkind: CSK_MD5, checksum: "6d758cfa3834154a04ce8a55102772a9")
+!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 9.0.0 (https://github.com/llvm/llvm-project.git 9c8073f44f786fbf47335e53f20abe64429e8e47)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: None)!1 = !DIFile(filename: "filename", directory: "directory", checksumkind: CSK_MD5, checksum: "096443b661a0af36da9006330c08f97e")
!2 = !{}
!3 = !{i32 2, !"CodeView", i32 1}
!4 = !{i32 2, !"Debug Info Version", i32 3}
!5 = !{i32 1, !"wchar_size", i32 2}
!6 = !{i32 7, !"PIC Level", i32 2}
-!7 = !{!"clang version 9.0.0 (https://github.com/llvm/llvm-project.git 4eff3de99423a62fd6e833e29c71c1e62ba6140b)"}
-!8 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 3, type: !9, scopeLine: 3, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2)
+!7 = !{!"clang version 9.0.0 (https://github.com/llvm/llvm-project.git 9c8073f44f786fbf47335e53f20abe64429e8e47)"}
+!8 = distinct !DISubprogram(name: "call_virtual", scope: !1, file: !1, line: 8, type: !9, scopeLine: 8, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2)
!9 = !DISubroutineType(types: !10)
-!10 = !{null}
-!11 = !DILocation(line: 4, scope: !8)
-!12 = !DILocation(line: 5, scope: !8)
-!13 = distinct !DISubprogram(name: "do_alloc", scope: !1, file: !1, line: 11, type: !14, scopeLine: 11, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2)
-!14 = !DISubroutineType(types: !15)
-!15 = !{null, !16}
-!16 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !17, size: 64)
-!17 = !DICompositeType(tag: DW_TAG_structure_type, name: "Foo", file: !1, line: 7, flags: DIFlagFwdDecl)
-!18 = !DILocalVariable(name: "p", arg: 1, scope: !13, file: !1, line: 11, type: !16)
-!19 = !DILocation(line: 11, scope: !13)
-!20 = !DILocation(line: 12, scope: !13)
-!21 = !DILocation(line: 13, scope: !13)
-
+!10 = !{null, !11}
+!11 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !12, size: 64)
+!12 = !DICompositeType(tag: DW_TAG_structure_type, name: "Foo", file: !1, line: 1, flags: DIFlagFwdDecl, identifier: ".?AUFoo@@")
+!13 = !DILocalVariable(name: "p", arg: 1, scope: !8, file: !1, line: 8, type: !11)
+!14 = !DILocation(line: 8, scope: !8)
+!15 = !DILocation(line: 9, scope: !8)
+!16 = !DILocation(line: 10, scope: !8)
+!17 = distinct !DISubprogram(name: "call_multiple", scope: !1, file: !1, line: 12, type: !18, scopeLine: 12, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2)
+!18 = !DISubroutineType(types: !19)
+!19 = !{null}
+!20 = !DILocation(line: 13, scope: !17)
+!21 = !DILocation(line: 14, scope: !17)
+!22 = !DILocation(line: 15, scope: !17)
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