[llvm] 79daafc - Reland: [DWARF] Allow cross-CU references of subprogram definitions
Vedant Kumar via llvm-commits
llvm-commits at lists.llvm.org
Fri Jan 24 18:09:58 PST 2020
I think this is hitting null-assigned-to-a-reference UB, as before CalleeSP is passed to constructCallSiteEntryDIE, it must pass through getOrCreateSubprogramDIE which always returns non-null.
Can I use the reproducer on Darwin? I’ll try building lld and revert 79daafc90308787b52a5d3a7586e82acd5e374b3 for now.
To github.com:llvm/llvm-project.git
0ebc8e6c421..802bec89617 master -> master
vedant
> On Jan 24, 2020, at 4:11 PM, Hans Wennborg <hans at chromium.org> wrote:
>
> We're hitting an assert due to this again in Chromium, see
> https://bugs.chromium.org/p/chromium/issues/detail?id=1045592#c15 for
> a reproducer.
> Can you take a look?
>
> On Fri, Dec 20, 2019 at 3:27 PM Vedant Kumar via llvm-commits
> <llvm-commits at lists.llvm.org> wrote:
>>
>>
>> Author: Vedant Kumar
>> Date: 2019-12-20T15:26:31-08:00
>> New Revision: 79daafc90308787b52a5d3a7586e82acd5e374b3
>>
>> URL: https://github.com/llvm/llvm-project/commit/79daafc90308787b52a5d3a7586e82acd5e374b3
>> DIFF: https://github.com/llvm/llvm-project/commit/79daafc90308787b52a5d3a7586e82acd5e374b3.diff
>>
>> LOG: Reland: [DWARF] Allow cross-CU references of subprogram definitions
>>
>> This allows a call site tag in CU A to reference a callee DIE in CU B
>> without resorting to creating an incomplete duplicate DIE for the callee
>> inside of CU A.
>>
>> We already allow cross-CU references of subprogram declarations, so it
>> doesn't seem like definitions ought to be special.
>>
>> This improves entry value evaluation and tail call frame synthesis in
>> the LTO setting. During LTO, it's common for cross-module inlining to
>> produce a call in some CU A where the callee resides in a different CU,
>> and there is no declaration subprogram for the callee anywhere. In this
>> case llvm would (unnecessarily, I think) emit an empty DW_TAG_subprogram
>> in order to fill in the call site tag. That empty 'definition' defeats
>> entry value evaluation etc., because the debugger can't figure out what
>> it means.
>>
>> As a follow-up, maybe we could add a DWARF verifier check that a
>> DW_TAG_subprogram at least has a DW_AT_name attribute.
>>
>> Update:
>>
>> Reland with a fix to create a declaration DIE when the declaration is
>> missing from the CU's retainedTypes list. The declaration is left out
>> of the retainedTypes list in two cases:
>>
>> 1) Re-compiling pre-r266445 bitcode (in which declarations weren't added
>> to the retainedTypes list), and
>> 2) Doing LTO function importing (which doesn't update the retainedTypes
>> list).
>>
>> It's possible to handle (1) and (2) by modifying the retainedTypes list
>> (in AutoUpgrade, or in the LTO importing logic resp.), but I don't see
>> an advantage to doing it this way, as it would cause more DWARF to be
>> emitted compared to creating the declaration DIEs lazily.
>>
>> Tested with a stage2 ThinLTO+RelWithDebInfo build of clang, and with a
>> ReleaseLTO-g build of the test suite.
>>
>> rdar://46577651, rdar://57855316, rdar://57840415
>>
>> Differential Revision: https://reviews.llvm.org/D70350
>>
>> Added:
>> llvm/test/DebugInfo/AArch64/unretained-declaration-subprogram.ll
>> llvm/test/DebugInfo/X86/lto-cross-cu-call-origin-ref.ll
>>
>> Modified:
>> llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp
>> llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
>> llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h
>> llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp
>>
>> Removed:
>>
>>
>>
>> ################################################################################
>> diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp b/llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp
>> index 5707f962b4be..b2b98f19ca1c 100644
>> --- a/llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp
>> +++ b/llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp
>> @@ -972,8 +972,8 @@ DIE &DwarfCompileUnit::constructCallSiteEntryDIE(
>> addAddress(CallSiteDIE, getDwarf5OrGNUAttr(dwarf::DW_AT_call_target),
>> MachineLocation(CallReg));
>> } else {
>> - DIE *CalleeDIE = getOrCreateSubprogramDIE(CalleeSP);
>> - assert(CalleeDIE && "Could not create DIE for call site entry origin");
>> + DIE *CalleeDIE = getDIE(CalleeSP);
>> + assert(CalleeDIE && "Could not find DIE for call site entry origin");
>> addDIEEntry(CallSiteDIE, getDwarf5OrGNUAttr(dwarf::DW_AT_call_origin),
>> *CalleeDIE);
>> }
>>
>> diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
>> index 739cbaf694f5..d1a36299dc4a 100644
>> --- a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
>> +++ b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
>> @@ -540,6 +540,14 @@ void DwarfDebug::constructAbstractSubprogramScopeDIE(DwarfCompileUnit &SrcCU,
>> }
>> }
>>
>> +DIE &DwarfDebug::constructSubprogramDefinitionDIE(const DISubprogram *SP) {
>> + DICompileUnit *Unit = SP->getUnit();
>> + assert(SP->isDefinition() && "Subprogram not a definition");
>> + assert(Unit && "Subprogram definition without parent unit");
>> + auto &CU = getOrCreateDwarfCompileUnit(Unit);
>> + return *CU.getOrCreateSubprogramDIE(SP);
>> +}
>> +
>> /// Try to interpret values loaded into registers that forward parameters
>> /// for \p CallMI. Store parameters with interpreted value into \p Params.
>> static void collectCallSiteParameters(const MachineInstr *CallMI,
>> @@ -750,6 +758,17 @@ void DwarfDebug::constructCallSiteEntryDIEs(const DISubprogram &SP,
>> if (!CalleeDecl || !CalleeDecl->getSubprogram())
>> continue;
>> CalleeSP = CalleeDecl->getSubprogram();
>> +
>> + if (CalleeSP->isDefinition()) {
>> + // Ensure that a subprogram DIE for the callee is available in the
>> + // appropriate CU.
>> + constructSubprogramDefinitionDIE(CalleeSP);
>> + } else {
>> + // Create the declaration DIE if it is missing. This is required to
>> + // support compilation of old bitcode with an incomplete list of
>> + // retained metadata.
>> + CU.getOrCreateSubprogramDIE(CalleeSP);
>> + }
>> }
>>
>> // TODO: Omit call site entries for runtime calls (objc_msgSend, etc).
>> @@ -906,6 +925,8 @@ DwarfDebug::getOrCreateDwarfCompileUnit(const DICompileUnit *DIUnit) {
>> }
>>
>> // Create DIEs for function declarations used for call site debug info.
>> + // Note: Declaration subprograms imported by LTO are not added to the unit's
>> + // list of retained types, so their DIEs are not constructed here.
>> for (auto Scope : DIUnit->getRetainedTypes())
>> if (auto *SP = dyn_cast_or_null<DISubprogram>(Scope))
>> NewCU.getOrCreateSubprogramDIE(SP);
>>
>> diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h
>> index f90dd48458ea..fd82b1f98055 100644
>> --- a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h
>> +++ b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h
>> @@ -442,6 +442,9 @@ class DwarfDebug : public DebugHandlerBase {
>> /// Construct a DIE for this abstract scope.
>> void constructAbstractSubprogramScopeDIE(DwarfCompileUnit &SrcCU, LexicalScope *Scope);
>>
>> + /// Construct a DIE for the subprogram definition \p SP and return it.
>> + DIE &constructSubprogramDefinitionDIE(const DISubprogram *SP);
>> +
>> /// Construct DIEs for call site entries describing the calls in \p MF.
>> void constructCallSiteEntryDIEs(const DISubprogram &SP, DwarfCompileUnit &CU,
>> DIE &ScopeDIE, const MachineFunction &MF);
>>
>> diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp b/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp
>> index 53747aef77fd..1aba956c48de 100644
>> --- a/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp
>> +++ b/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp
>> @@ -188,8 +188,9 @@ int64_t DwarfUnit::getDefaultLowerBound() const {
>>
>> /// Check whether the DIE for this MDNode can be shared across CUs.
>> bool DwarfUnit::isShareableAcrossCUs(const DINode *D) const {
>> - // When the MDNode can be part of the type system, the DIE can be shared
>> - // across CUs.
>> + // When the MDNode can be part of the type system (this includes subprogram
>> + // declarations *and* subprogram definitions, even local definitions), the
>> + // DIE must be shared across CUs.
>> // Combining type units and cross-CU DIE sharing is lower value (since
>> // cross-CU DIE sharing is used in LTO and removes type redundancy at that
>> // level already) but may be implementable for some value in projects
>> @@ -197,9 +198,7 @@ bool DwarfUnit::isShareableAcrossCUs(const DINode *D) const {
>> // together.
>> if (isDwoUnit() && !DD->shareAcrossDWOCUs())
>> return false;
>> - return (isa<DIType>(D) ||
>> - (isa<DISubprogram>(D) && !cast<DISubprogram>(D)->isDefinition())) &&
>> - !DD->generateTypeUnits();
>> + return (isa<DIType>(D) || isa<DISubprogram>(D)) && !DD->generateTypeUnits();
>> }
>>
>> DIE *DwarfUnit::getDIE(const DINode *D) const {
>>
>> diff --git a/llvm/test/DebugInfo/AArch64/unretained-declaration-subprogram.ll b/llvm/test/DebugInfo/AArch64/unretained-declaration-subprogram.ll
>> new file mode 100644
>> index 000000000000..17ead0e81242
>> --- /dev/null
>> +++ b/llvm/test/DebugInfo/AArch64/unretained-declaration-subprogram.ll
>> @@ -0,0 +1,44 @@
>> +; RUN: llc -mtriple=arm64-apple-ios -filetype=obj < %s -o %t.o
>> +; RUN: llvm-dwarfdump %t.o | FileCheck %s -implicit-check-not=DW_TAG_subprogram
>> +
>> +; The declaration subprogram for "function" is not in the CU's list of
>> +; retained types. Test that a DWARF call site entry can still be constructed.
>> +
>> +; CHECK: DW_TAG_subprogram
>> +; CHECK: DW_AT_name {{.*}}__hidden#3_
>> +; CHECK: DW_TAG_call_site
>> +; CHECK: DW_AT_call_origin (0x{{0+}}[[FUNCTION_DIE:.*]])
>> +
>> +; CHECK: 0x{{0+}}[[FUNCTION_DIE]]: DW_TAG_subprogram
>> +; CHECK: DW_AT_name {{.*}}function
>> +
>> +target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128"
>> +target triple = "arm64-apple-ios9.0.0"
>> +
>> +define i32 @main() local_unnamed_addr !dbg !8 {
>> + %1 = tail call [2 x i64] @function([2 x i64] zeroinitializer), !dbg !11
>> + %2 = extractvalue [2 x i64] %1, 0, !dbg !11
>> + %3 = trunc i64 %2 to i32, !dbg !11
>> + ret i32 %3, !dbg !12
>> +}
>> +
>> +declare !dbg !13 [2 x i64] @function([2 x i64]) local_unnamed_addr
>> +
>> +!llvm.module.flags = !{!0, !1, !2, !3, !4}
>> +!llvm.dbg.cu = !{!5}
>> +!llvm.ident = !{!7}
>> +
>> +!0 = !{i32 2, !"SDK Version", [2 x i32] [i32 13, i32 4]}
>> +!1 = !{i32 7, !"Dwarf Version", i32 4}
>> +!2 = !{i32 2, !"Debug Info Version", i32 3}
>> +!3 = !{i32 1, !"wchar_size", i32 4}
>> +!4 = !{i32 7, !"PIC Level", i32 2}
>> +!5 = distinct !DICompileUnit(language: DW_LANG_C99, file: !6, producer: "__hidden#0_", isOptimized: true, runtimeVersion: 0, emissionKind: LineTablesOnly, nameTableKind: None)
>> +!6 = !DIFile(filename: "__hidden#1_", directory: "__hidden#2_")
>> +!7 = !{!"Apple clang version 11.0.0 (llvm-project fa407d93fd5e618d76378c1ce4e4f517e0563278) (+internal-os)"}
>> +!8 = distinct !DISubprogram(name: "__hidden#3_", scope: !6, file: !6, line: 9, type: !9, scopeLine: 9, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !5)
>> +!9 = !DISubroutineType(types: !10)
>> +!10 = !{}
>> +!11 = !DILocation(line: 12, column: 10, scope: !8)
>> +!12 = !DILocation(line: 13, column: 3, scope: !8)
>> +!13 = !DISubprogram(name: "function", scope: !6, file: !6, line: 7, type: !9, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized)
>>
>> diff --git a/llvm/test/DebugInfo/X86/lto-cross-cu-call-origin-ref.ll b/llvm/test/DebugInfo/X86/lto-cross-cu-call-origin-ref.ll
>> new file mode 100644
>> index 000000000000..db14b06fc517
>> --- /dev/null
>> +++ b/llvm/test/DebugInfo/X86/lto-cross-cu-call-origin-ref.ll
>> @@ -0,0 +1,223 @@
>> +; RUN: llc -mtriple=x86_64-apple-darwin -filetype=obj < %s -o %t.o
>> +; RUN: llvm-dwarfdump %t.o | FileCheck %s -implicit-check-not=DW_TAG_subprogram
>> +; RUN: llvm-dwarfdump --verify %t.o
>> +
>> +; This test checks that cross-CU references within call site tags to subprogram
>> +; definitions are well-formed. There are 5 cases checked in this test. Each set
>> +; of checks is numbered and has a brief summary.
>> +
>> +; Instructions to regenerate the IR:
>> +; clang -O1 -g -emit-llvm -o a.bc -c a.c
>> +; clang -O1 -g -emit-llvm -o b.bc -c b.c
>> +; llvm-link -o linked.bc a.bc b.bc
>> +; opt -O1 linked.bc -o merged.bc
>> +
>> +; Source:
>> +; // a.c
>> +; __attribute__((optnone)) void noinline_func_in_a() {}
>> +;
>> +; __attribute__((optnone)) static void foo() {}
>> +; __attribute__((always_inline)) void always_inline_helper_in_a_that_calls_foo() {
>> +; foo();
>> +; }
>> +;
>> +; extern void func_from_b();
>> +; void call_func_in_b_from_a() {
>> +; func_from_b();
>> +; }
>> +;
>> +; // b.c
>> +; extern void noinline_func_in_a();
>> +; void call_noinline_func_in_a_from_b() {
>> +; noinline_func_in_a();
>> +; }
>> +;
>> +; __attribute__((optnone)) void foo() {}
>> +; extern void always_inline_helper_in_a_that_calls_foo();
>> +; void call_both_foos_from_b() {
>> +; foo();
>> +; always_inline_helper_in_a_that_calls_foo();
>> +; }
>> +;
>> +; __attribute__((optnone)) void func_from_b() {}
>> +; void call_func_in_b_from_b() {
>> +; func_from_b();
>> +; }
>> +
>> +; === CU for a.c ===
>> +
>> +; CHECK: DW_TAG_compile_unit
>> +; CHECK: DW_AT_name ("a.c")
>> +
>> +; CHECK: DW_TAG_subprogram
>> +; CHECK: DW_AT_name ("func_from_b")
>> +; CHECK: DW_AT_declaration (true)
>> +
>> +; CHECK: 0x{{0+}}[[NOINLINE_FUNC_IN_A:.*]]: DW_TAG_subprogram
>> +; CHECK: DW_AT_name ("noinline_func_in_a")
>> +
>> +; 1) Check that "always_inline_helper_in_a_that_calls_foo" calls the "foo" in
>> +; a.c, and *not* the "foo" in b.c.
>> +; CHECK: 0x{{0+}}[[ALWAYS_INLINE_HELPER_IN_A:.*]]: DW_TAG_subprogram
>> +; CHECK: DW_AT_abstract_origin ({{.*}} "always_inline_helper_in_a_that_calls_foo")
>> +; CHECK: DW_TAG_call_site
>> +; CHECK-NEXT: DW_AT_call_origin (0x{{0+}}[[FOO_IN_A:.*]])
>> +
>> +; CHECK: 0x{{0+}}[[FOO_IN_A]]: DW_TAG_subprogram
>> +; CHECK: DW_AT_name ("foo")
>> +
>> +; 2) Check that "call_func_in_b_from_a" has a cross-CU ref into b.c.
>> +; CHECK: DW_TAG_subprogram
>> +; CHECK: DW_AT_name ("call_func_in_b_from_a")
>> +; CHECK: DW_TAG_call_site
>> +; CHECK-NEXT: DW_AT_call_origin (0x{{0+}}[[FUNC_FROM_B:.*]])
>> +
>> +; CHECK: DW_TAG_subprogram
>> +; CHECK: DW_AT_name ("always_inline_helper_in_a_that_calls_foo")
>> +; CHECK: DW_AT_inline (DW_INL_inlined)
>> +
>> +; === CU for b.c ===
>> +
>> +; CHECK: DW_TAG_compile_unit
>> +; CHECK: DW_AT_name ("b.c")
>> +
>> +; CHECK: DW_TAG_subprogram
>> +; CHECK: DW_AT_name ("noinline_func_in_a")
>> +; CHECK: DW_AT_declaration (true)
>> +
>> +; CHECK: DW_TAG_subprogram
>> +; CHECK: DW_AT_name ("always_inline_helper_in_a_that_calls_foo")
>> +; CHECK: DW_AT_declaration (true)
>> +
>> +; 3) Validate the cross-CU ref from "call_func_in_b_from_a" in a.c.
>> +; CHECK: 0x{{0+}}[[FUNC_FROM_B]]: DW_TAG_subprogram
>> +; CHECK: DW_AT_name ("func_from_b")
>> +
>> +; 4) Validate the cross-CU ref from "call_noinline_func_in_a_from_b" in b.c.
>> +; CHECK: DW_TAG_subprogram
>> +; CHECK: DW_AT_name ("call_noinline_func_in_a_from_b")
>> +; CHECK: DW_TAG_call_site
>> +; CHECK-NEXT: DW_AT_call_origin (0x{{0+}}[[NOINLINE_FUNC_IN_A]])
>> +
>> +; CHECK: 0x{{0+}}[[FOO_IN_B:.*]]: DW_TAG_subprogram
>> +; CHECK: DW_AT_name ("foo")
>> +
>> +; 5) Validate that we correctly emit a cross-CU ref when the call is inlined
>> +; from another CU.
>> +; CHECK: DW_TAG_subprogram
>> +; CHECK: DW_AT_name ("call_both_foos_from_b")
>> +; CHECK: DW_TAG_call_site
>> +; CHECK-NEXT: DW_AT_call_origin (0x{{0+}}[[FOO_IN_B]])
>> +; CHECK: DW_TAG_call_site
>> +; CHECK-NEXT: DW_AT_call_origin (0x{{0+}}[[FOO_IN_A]])
>> +
>> +; CHECK: DW_TAG_subprogram
>> +; CHECK: DW_AT_name ("call_func_in_b_from_b")
>> +; CHECK: DW_TAG_call_site
>> +; CHECK-NEXT: DW_AT_call_origin (0x{{0+}}[[FUNC_FROM_B]])
>> +
>> +target datalayout = "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
>> +target triple = "x86_64-apple-macosx10.14.0"
>> +
>> +define void @noinline_func_in_a() local_unnamed_addr #0 !dbg !17 {
>> +entry:
>> + ret void, !dbg !20
>> +}
>> +
>> +define void @always_inline_helper_in_a_that_calls_foo() local_unnamed_addr #1 !dbg !21 {
>> +entry:
>> + tail call fastcc void @foo.2(), !dbg !22
>> + ret void, !dbg !23
>> +}
>> +
>> +define internal fastcc void @foo.2() unnamed_addr #0 !dbg !24 {
>> +entry:
>> + ret void, !dbg !25
>> +}
>> +
>> +define void @call_func_in_b_from_a() local_unnamed_addr !dbg !26 {
>> +entry:
>> + tail call void @func_from_b() #3, !dbg !27
>> + ret void, !dbg !28
>> +}
>> +
>> +define void @call_noinline_func_in_a_from_b() local_unnamed_addr !dbg !29 {
>> +entry:
>> + tail call void @noinline_func_in_a() #3, !dbg !30
>> + ret void, !dbg !31
>> +}
>> +
>> +define void @foo() local_unnamed_addr #0 !dbg !32 {
>> +entry:
>> + ret void, !dbg !33
>> +}
>> +
>> +define void @call_both_foos_from_b() local_unnamed_addr !dbg !34 {
>> +entry:
>> + tail call void @foo(), !dbg !35
>> + tail call fastcc void @foo.2() #3, !dbg !36
>> + ret void, !dbg !38
>> +}
>> +
>> +define void @func_from_b() local_unnamed_addr #0 !dbg !39 {
>> +entry:
>> + ret void, !dbg !40
>> +}
>> +
>> +define void @call_func_in_b_from_b() local_unnamed_addr !dbg !41 {
>> +entry:
>> + tail call void @func_from_b(), !dbg !42
>> + ret void, !dbg !43
>> +}
>> +
>> +attributes #0 = { noinline }
>> +attributes #1 = { alwaysinline }
>> +
>> +!llvm.dbg.cu = !{!0, !7}
>> +!llvm.ident = !{!12, !12}
>> +!llvm.module.flags = !{!13, !14, !15, !16}
>> +
>> +!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 10.0.0 (git at github.com:llvm/llvm-project.git 310e85309f870ee7347ef979d7d8da9bf28e92ea)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !3, nameTableKind: None)
>> +!1 = !DIFile(filename: "a.c", directory: "/Users/vsk/tmp/lto-entry-vals")
>> +!2 = !{}
>> +!3 = !{!4}
>> +!4 = !DISubprogram(name: "func_from_b", scope: !1, file: !1, line: 8, type: !5, spFlags: DISPFlagOptimized, retainedNodes: !2)
>> +!5 = !DISubroutineType(types: !6)
>> +!6 = !{null, null}
>> +!7 = distinct !DICompileUnit(language: DW_LANG_C99, file: !8, producer: "clang version 10.0.0 (git at github.com:llvm/llvm-project.git 310e85309f870ee7347ef979d7d8da9bf28e92ea)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !9, nameTableKind: None)
>> +!8 = !DIFile(filename: "b.c", directory: "/Users/vsk/tmp/lto-entry-vals")
>> +!9 = !{!10, !11}
>> +!10 = !DISubprogram(name: "noinline_func_in_a", scope: !8, file: !8, line: 1, type: !5, spFlags: DISPFlagOptimized, retainedNodes: !2)
>> +!11 = !DISubprogram(name: "always_inline_helper_in_a_that_calls_foo", scope: !8, file: !8, line: 7, type: !5, spFlags: DISPFlagOptimized, retainedNodes: !2)
>> +!12 = !{!"clang version 10.0.0 (git at github.com:llvm/llvm-project.git 310e85309f870ee7347ef979d7d8da9bf28e92ea)"}
>> +!13 = !{i32 7, !"Dwarf Version", i32 4}
>> +!14 = !{i32 2, !"Debug Info Version", i32 3}
>> +!15 = !{i32 1, !"wchar_size", i32 4}
>> +!16 = !{i32 7, !"PIC Level", i32 2}
>> +!17 = distinct !DISubprogram(name: "noinline_func_in_a", scope: !1, file: !1, line: 1, type: !18, scopeLine: 1, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !2)
>> +!18 = !DISubroutineType(types: !19)
>> +!19 = !{null}
>> +!20 = !DILocation(line: 1, column: 53, scope: !17)
>> +!21 = distinct !DISubprogram(name: "always_inline_helper_in_a_that_calls_foo", scope: !1, file: !1, line: 4, type: !18, scopeLine: 4, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !2)
>> +!22 = !DILocation(line: 5, column: 3, scope: !21)
>> +!23 = !DILocation(line: 6, column: 1, scope: !21)
>> +!24 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 3, type: !18, scopeLine: 3, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagLocalToUnit | DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !2)
>> +!25 = !DILocation(line: 3, column: 45, scope: !24)
>> +!26 = distinct !DISubprogram(name: "call_func_in_b_from_a", scope: !1, file: !1, line: 9, type: !18, scopeLine: 9, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !2)
>> +!27 = !DILocation(line: 10, column: 3, scope: !26)
>> +!28 = !DILocation(line: 11, column: 1, scope: !26)
>> +!29 = distinct !DISubprogram(name: "call_noinline_func_in_a_from_b", scope: !8, file: !8, line: 2, type: !18, scopeLine: 2, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !7, retainedNodes: !2)
>> +!30 = !DILocation(line: 3, column: 3, scope: !29)
>> +!31 = !DILocation(line: 4, column: 1, scope: !29)
>> +!32 = distinct !DISubprogram(name: "foo", scope: !8, file: !8, line: 6, type: !18, scopeLine: 6, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !7, retainedNodes: !2)
>> +!33 = !DILocation(line: 6, column: 38, scope: !32)
>> +!34 = distinct !DISubprogram(name: "call_both_foos_from_b", scope: !8, file: !8, line: 8, type: !18, scopeLine: 8, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !7, retainedNodes: !2)
>> +!35 = !DILocation(line: 9, column: 3, scope: !34)
>> +!36 = !DILocation(line: 5, column: 3, scope: !21, inlinedAt: !37)
>> +!37 = distinct !DILocation(line: 10, column: 3, scope: !34)
>> +!38 = !DILocation(line: 11, column: 1, scope: !34)
>> +!39 = distinct !DISubprogram(name: "func_from_b", scope: !8, file: !8, line: 13, type: !18, scopeLine: 13, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !7, retainedNodes: !2)
>> +!40 = !DILocation(line: 13, column: 46, scope: !39)
>> +!41 = distinct !DISubprogram(name: "call_func_in_b_from_b", scope: !8, file: !8, line: 14, type: !18, scopeLine: 14, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !7, retainedNodes: !2)
>> +!42 = !DILocation(line: 15, column: 3, scope: !41)
>> +!43 = !DILocation(line: 16, column: 1, scope: !41)
>>
>>
>>
>> _______________________________________________
>> llvm-commits mailing list
>> llvm-commits at lists.llvm.org
>> https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-commits
More information about the llvm-commits
mailing list