[DebugInfo] retainedTypes should not have subprograms

[ellis]

Summary

After D80369, the retainedTypes in CU's should not have any
subprograms so we should not handle that case when emitting debug info.

[ellis]

Fix tests

[ellis]

I found this while looking through the callsites to getOrCreateSubprogramDIE(). I was thinking of adding an assert to check that retainedTypes don't include SPs but it seems there are a lot of tests that do this.

[djtodoro]

This looks reasonable to me.

The call_site entries still point to the right subprograms after this patch, right?

[ellis]

In D111593#3060704, @djtodoro wrote:

This looks reasonable to me.

The call_site entries still point to the right subprograms after this patch, right?

Yep, just tested a basic program.

extern int foo();
int bar() { return foo() + 1; }

[djtodoro]

llvm/test/DebugInfo/MIR/AArch64/dbgcall-site-orr-moves.mir

75

retainedTypes: !3 - this should be removed completely, so we do not leave any ambiguity

77–78

and then remove this

[ellis]

Remove empty retainedTypes: from tests.

llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp

DwarfDebug::getOrCreateDwarfCompileUnit(const DICompileUnit *DIUnit) {
   if (useSplitDwarf()) {
     NewCU.setSkeleton(constructSkeletonCU(NewCU));
     NewCU.setSection(Asm->getObjFileLowering().getDwarfInfoDWOSection());
   } else {
     finishUnitAttributes(DIUnit, NewCU);
     NewCU.setSection(Asm->getObjFileLowering().getDwarfInfoSection());
   }
 
-  // Create DIEs for function declarations used for call site debug info.
-  for (auto Scope : DIUnit->getRetainedTypes())
-    if (auto *SP = dyn_cast_or_null<DISubprogram>(Scope))
-      NewCU.getOrCreateSubprogramDIE(SP);
-
   CUMap.insert({DIUnit, &NewCU});
   CUDieMap.insert({&NewCU.getUnitDie(), &NewCU});
   return NewCU;
 }
 
 void DwarfDebug::constructAndAddImportedEntityDIE(DwarfCompileUnit &TheCU,
                                                   const DIImportedEntity *N) {
   if (isa<DILocalScope>(N->getScope()))

llvm/test/DebugInfo/MIR/AArch64/dbgcall-site-indirect-param.mir

 # MIR:      renamable $w0 = LDRWui killed renamable $x8
 # MIR-NEXT: DBG_VALUE $x0, 0, {{.*}}, !DIExpression(DW_OP_LLVM_entry_value, 1)
 # MIR-NEXT: BL @baz
 # MIR-NEXT: frame-destroy LDPXpost
 # MIR-NEXT: TCRETURNdi @baz
 
 # After w0 is clobbered, we should get an indirect parameter entry value for "f".
 
-# DWARF-LABEL: DW_TAG_subprogram
-# DWARF:       DW_AT_name ("baz")
-
-# DWARF-LABEL: DW_TAG_subprogram
-# DWARF-LABEL: DW_TAG_formal_parameter
+# DWARF: DW_TAG_subprogram
+# DWARF: DW_TAG_formal_parameter
 # DWARF-NEXT: DW_AT_location
 # DWARF-NEXT: [0x0000000000000000, 0x0000000000000010): DW_OP_breg0 W0+0
 # DWARF-NEXT: [0x0000000000000010, 0x000000000000001c): DW_OP_entry_value(DW_OP_reg0 W0))
 # DWARF-NEXT: DW_AT_name    ("f")
 
+# DWARF: DW_TAG_subprogram
+# DWARF:       DW_AT_name ("baz")
+
 --- |
   target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128"
   target triple = "arm64-apple-ios10.0.0"
 
   %struct.fat_ptr = type { i32*, i32*, i32* }
 
   define i32 @bar(%struct.fat_ptr* nocapture readonly %f) local_unnamed_addr !dbg !13 {
   entry:
--- |
   declare void @llvm.dbg.declare(metadata, metadata, metadata)
 
   declare !dbg !4 i32 @baz(i32) local_unnamed_addr optsize
 
   !llvm.dbg.cu = !{!0}
   !llvm.module.flags = !{!8, !9, !10, !11}
   !llvm.ident = !{!12}
 
-  !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !3, nameTableKind: None, sysroot: "/")
+  !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: None, sysroot: "/")
   !1 = !DIFile(filename: "indirect.c", directory: "/tmp/fatptr")
   !2 = !{}
-  !3 = !{!4}
   !4 = !DISubprogram(name: "baz", scope: !1, file: !1, line: 4, type: !5, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !2)
   !5 = !DISubroutineType(types: !6)
   !6 = !{!7, !7}
   !7 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
   !8 = !{i32 7, !"Dwarf Version", i32 4}
   !9 = !{i32 2, !"Debug Info Version", i32 3}
   !10 = !{i32 1, !"wchar_size", i32 4}
   !11 = !{i32 7, !"PIC Level", i32 2}

llvm/test/DebugInfo/MIR/AArch64/dbgcall-site-orr-moves.mir

--- |
 
   attributes #0 = { noinline nounwind  "frame-pointer"="all" }
   attributes #1 = { nounwind readnone speculatable willreturn }
 
   !llvm.dbg.cu = !{!0}
   !llvm.module.flags = !{!15, !16, !17}
   !llvm.ident = !{!18}
 
-  !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 10.0.0 (ssh://gerritmirror.rnd.ki.sw.ericsson.se:29418/flextools/llvm-project.git f76e863b549ddccd5e917e2f3ff50646915654d2)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !3, nameTableKind: None)
+  !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 10.0.0 (ssh://gerritmirror.rnd.ki.sw.ericsson.se:29418/flextools/llvm-project.git f76e863b549ddccd5e917e2f3ff50646915654d2)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: None)
   !1 = !DIFile(filename: "orrxrs.c", directory: "/repo/edasten/llvm-project/llvm")
   !2 = !{}
-  !3 = !{!4, !8, !12}
   !4 = !DISubprogram(name: "call_int", scope: !1, file: !1, line: 1, type: !5, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !2)
   !5 = !DISubroutineType(types: !6)
   !6 = !{null, !7}
   !7 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
   !8 = !DISubprogram(name: "call_long", scope: !1, file: !1, line: 3, type: !9, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !2)
   !9 = !DISubroutineType(types: !10)
   !10 = !{null, !11}
   !11 = !DIBasicType(name: "long int", size: 64, encoding: DW_ATE_signed)
   !12 = !DISubprogram(name: "call_int_int", scope: !1, file: !1, line: 2, type: !13, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !2)
bb.0.entry:
     DBG_VALUE $w0, $noreg, !23, !DIExpression(DW_OP_LLVM_entry_value, 1), debug-location !24
     $w0 = ORRWrs $wzr, $wzr, 0, debug-location !26
     early-clobber $sp, $fp, $lr = frame-destroy LDPXpost $sp, 2, debug-location !26 :: (load (s64) from %stack.1), (load (s64) from %stack.0)
     RET undef $lr, implicit killed $w0, debug-location !26
 
 ...
 
 # CHECK: DW_TAG_GNU_call_site
-# CHECK-NEXT: DW_AT_abstract_origin (0x0000002a "call_int")
+# CHECK-NEXT: DW_AT_abstract_origin ({{.*}} "call_int")
 #
 # CHECK: DW_TAG_GNU_call_site_parameter
 # CHECK-NEXT: DW_AT_location      (DW_OP_reg0 W0)
 # CHECK-NEXT: DW_AT_GNU_call_site_value   (DW_OP_GNU_entry_value(DW_OP_reg0 W0))
 
 ---
 name:            super_reg
 alignment:       4
bb.0.entry:
     BL @call_long, csr_aarch64_aapcs, implicit-def dead $lr, implicit $sp, implicit killed $x0, implicit-def $sp, debug-location !34
     $w0 = ORRWrs $wzr, $wzr, 0, debug-location !35
     early-clobber $sp, $fp, $lr = frame-destroy LDPXpost $sp, 2, debug-location !35 :: (load (s64) from %stack.1), (load (s64) from %stack.0)
     RET undef $lr, implicit killed $w0, debug-location !35
 
 ...
 
 # CHECK: DW_TAG_GNU_call_site
-# CHECK-NEXT: DW_AT_abstract_origin (0x0000003e "call_long")
+# CHECK-NEXT: DW_AT_abstract_origin ({{.*}} "call_long")
 #
 # CHECK: DW_TAG_GNU_call_site_parameter
 # CHECK-NEXT: DW_AT_location      (DW_OP_reg0 W0)
 # CHECK-NEXT: DW_AT_GNU_call_site_value   (DW_OP_GNU_entry_value(DW_OP_reg0 W0))
 
 ---
 name:            sub_reg
 alignment:       4
bb.0.entry:
     DBG_VALUE $w0, $noreg, !40, !DIExpression(), debug-location !42
     $x19 = frame-destroy LDRXui $sp, 2, debug-location !44 :: (load (s64) from %stack.0)
     early-clobber $sp, $fp, $lr = frame-destroy LDPXpost $sp, 4, debug-location !44 :: (load (s64) from %stack.2), (load (s64) from %stack.1)
     RET undef $lr, implicit killed $w0, debug-location !44
 
 ...
 
 # CHECK: DW_TAG_GNU_call_site
-# CHECK-NEXT: DW_AT_abstract_origin (0x00000052 "call_int_int")
+# CHECK-NEXT: DW_AT_abstract_origin ({{.*}} "call_int_int")
 #
 # CHECK: DW_TAG_GNU_call_site_parameter
 # CHECK-NEXT: DW_AT_location      (DW_OP_reg0 W0)
 # CHECK-NEXT: DW_AT_GNU_call_site_value   (DW_OP_GNU_entry_value(DW_OP_reg1 W1))

llvm/test/DebugInfo/MIR/X86/callsite-stack-value.mir

 # RUN: llc -start-after=livedebugvalues -mtriple=x86_64-apple-darwin -o - %s -filetype=obj \
 # RUN:   -emit-call-site-info | llvm-dwarfdump - | FileCheck %s -implicit-check-not=call_site_parameter
 
-# CHECK-LABEL: DW_TAG_subprogram
-# CHECK:       DW_AT_name ("f")
-# CHECK-LABEL: DW_TAG_subprogram
+# CHECK: DW_TAG_subprogram
 # CHECK:       DW_AT_name ("g")
 # CHECK:       DW_TAG_formal_parameter
 # CHECK-NEXT:  DW_AT_location (DW_OP_reg17 XMM0)
+# CHECK: DW_TAG_subprogram
+# CHECK:       DW_AT_name ("f")
 
 # struct S {
 #   float w;
 # };
 # void f(long w, long b);
 # void g(struct S s) {
 #   int w = s.w;
 #   f(w, w*4);
 # }
 
 --- |
   define void @g(float %s.coerce) local_unnamed_addr !dbg !20 {
   entry:
     ret void, !dbg !31
   }
   declare !dbg !14 void @f(i64, i64) local_unnamed_addr
   !llvm.module.flags = !{!6, !7, !8, !9}
   !llvm.dbg.cu = !{!10}
   !6 = !{i32 7, !"Dwarf Version", i32 4}
   !7 = !{i32 2, !"Debug Info Version", i32 3}
   !8 = !{i32 1, !"wchar_size", i32 4}
   !9 = !{i32 7, !"PIC Level", i32 2}
-  !10 = distinct !DICompileUnit(language: DW_LANG_ObjC, file: !15, producer: "", isOptimized: true, runtimeVersion: 2, emissionKind: FullDebug, enums: !12, retainedTypes: !13, nameTableKind: None, sysroot: "/")
+  !10 = distinct !DICompileUnit(language: DW_LANG_ObjC, file: !15, producer: "", isOptimized: true, runtimeVersion: 2, emissionKind: FullDebug, enums: !12, nameTableKind: None, sysroot: "/")
   !12 = !{}
-  !13 = !{!14}
   !14 = !DISubprogram(name: "f", scope: !15, file: !15, line: 4, type: !16, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !12)
   !15 = !DIFile(filename: "test.m", directory: "/")
   !16 = !DISubroutineType(types: !17)
   !17 = !{null, !18, !18}
   !18 = !DIBasicType(name: "long int", size: 64, encoding: DW_ATE_signed)
   !20 = distinct !DISubprogram(name: "g", scope: !15, file: !15, line: 5, type: !21, scopeLine: 5, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !10, retainedNodes: !27)
   !21 = !DISubroutineType(types: !22)
   !22 = !{null, !23}

llvm/test/DebugInfo/MIR/X86/debug-call-site-param.mir

 # CHECK-GNU-NEXT:      DW_AT_GNU_call_site_value   (DW_OP_fbreg +12)
 # CHECK-GNU:         DW_TAG_GNU_call_site_parameter
 # CHECK-GNU-NEXT:      DW_AT_location      (DW_OP_reg9 R9)
 # CHECK-GNU-NEXT:      DW_AT_GNU_call_site_value   (DW_OP_breg15 R15+0, DW_OP_breg3 RBX+0, DW_OP_plus)
 # CHECK-GNU:         DW_TAG_GNU_call_site_parameter
 # CHECK-GNU-NEXT:      DW_AT_location      (DW_OP_reg8 R8)
 # CHECK-GNU-NEXT:      DW_AT_GNU_call_site_value   (DW_OP_breg14 R14+3)
 
-# CHECK-DWARF5: [[getValue_SP:.*]]: DW_TAG_subprogram
-# CHECK-DWARF5-NEXT: DW_AT_name      ("getVal")
-
-# CHECK-DWARF5: [[foo_SP:.*]]: DW_TAG_subprogram
-# CHECK-DWARF5-NEXT: DW_AT_name      ("foo")
-
 # CHECK-DWARF5: DW_TAG_call_site
-# CHECK-DWARF5:   DW_AT_call_origin ([[getValue_SP]])
+# CHECK-DWARF5:   DW_AT_call_origin ([[getValue_SP:.*]])
 #
 # CHECK-DWARF5: DW_TAG_call_site
-# CHECK-DWARF5:   DW_AT_call_origin ([[foo_SP]])
+# CHECK-DWARF5:   DW_AT_call_origin ([[foo_SP:.*]])
 # CHECK-DWARF5:   DW_AT_call_return_pc {{.*}}
 # CHECK-DWARF5-EMPTY:
 # CHECK-DWARF5:         DW_TAG_call_site_parameter
 # CHECK-DWARF5-NEXT:      DW_AT_location      (DW_OP_reg2 RCX)
 # CHECK-DWARF5-NEXT:      DW_AT_call_value   (DW_OP_lit15)
 # CHECK-DWARF5:         DW_TAG_call_site_parameter
 # CHECK-DWARF5-NEXT:      DW_AT_location      (DW_OP_reg1 RDX)
 # CHECK-DWARF5-NEXT:      DW_AT_call_value   (DW_OP_lit10)
 # CHECK-DWARF5:         DW_TAG_call_site_parameter
 # CHECK-DWARF5-NEXT:      DW_AT_location      (DW_OP_reg4 RSI)
 # CHECK-DWARF5-NEXT:      DW_AT_call_value   (DW_OP_breg3 RBX+0)
 # CHECK-DWARF5:         DW_TAG_call_site_parameter
 # CHECK-DWARF5-NEXT:      DW_AT_location      (DW_OP_reg5 RDI)
 # CHECK-DWARF5-NEXT:      DW_AT_call_value   (DW_OP_fbreg +12)
 # CHECK-DWARF5:         DW_TAG_call_site_parameter
 # CHECK-DWARF5-NEXT:      DW_AT_location      (DW_OP_reg9 R9)
 # CHECK-DWARF5-NEXT:      DW_AT_call_value   (DW_OP_breg15 R15+0, DW_OP_breg3 RBX+0, DW_OP_plus)
 # CHECK-DWARF5:         DW_TAG_call_site_parameter
 # CHECK-DWARF5-NEXT:      DW_AT_location      (DW_OP_reg8 R8)
 # CHECK-DWARF5-NEXT:      DW_AT_call_value   (DW_OP_breg14 R14+3)
 
+# CHECK-DWARF5: [[getValue_SP]]: DW_TAG_subprogram
+# CHECK-DWARF5-NEXT: DW_AT_name      ("getVal")
+
+# CHECK-DWARF5: [[foo_SP]]: DW_TAG_subprogram
+# CHECK-DWARF5-NEXT: DW_AT_name      ("foo")
+
 --- |
   ; ModuleID = 'test.c'
   source_filename = "test.c"
   target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
   
   ; Function Attrs: nounwind uwtable
   define dso_local void @baa(i32 %arg1, i32 %arg2, i32 %arg3) local_unnamed_addr !dbg !10 {
   entry:
--- |
   
   ; Function Attrs: nounwind readnone speculatable
   declare void @llvm.dbg.value(metadata, metadata, metadata)
   
   !llvm.dbg.cu = !{!0}
   !llvm.module.flags = !{!6, !7, !8}
   !llvm.ident = !{!9}
   
-  !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 9.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !3, nameTableKind: None)
+  !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 9.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: None)
   !1 = !DIFile(filename: "test.c", directory: "/dir")
   !2 = !{}
-  !3 = !{!4, !5}
   !4 = !DISubprogram(name: "getVal", scope: !1, file: !1, line: 2, spFlags: DISPFlagOptimized, retainedNodes: !2)
   !5 = !DISubprogram(name: "foo", scope: !1, file: !1, line: 1, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !2)
   !6 = !{i32 2, !"Dwarf Version", i32 4}
   !7 = !{i32 2, !"Debug Info Version", i32 3}
   !8 = !{i32 1, !"wchar_size", i32 4}
   !9 = !{!"clang version 9.0.0"}
   !10 = distinct !DISubprogram(name: "baa", scope: !1, file: !1, line: 4, type: !11, scopeLine: 4, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !14)
   !11 = !DISubroutineType(types: !12)

llvm/test/DebugInfo/X86/convert-loclist.ll

 ; RUN: llc -mtriple=x86_64 -filetype=obj < %s \
 ; RUN:   | llvm-dwarfdump -debug-info -debug-loclists - | FileCheck %s
 ; RUN: llc -mtriple=x86_64 -split-dwarf-file=foo.dwo -filetype=obj -dwarf-op-convert=Enable < %s \
 ; RUN:   | llvm-dwarfdump -debug-info -debug-loclists - | FileCheck --check-prefix=SPLIT --check-prefix=CHECK %s
 ; RUN: llc -mtriple=x86_64 -split-dwarf-file=foo.dwo -filetype=asm -dwarf-op-convert=Enable < %s \
 ; RUN:   | FileCheck --check-prefix=ASM %s
 
 ; A bit of a brittle test - this is testing the specific DWO_id. The
 ; alternative would be to test two files with different DW_OP_convert values &
 ; ensuring the DWO IDs differ when the DW_OP_convert parameter differs.
 
 ; So if this test ends up being a brittle pain to maintain, updating the DWO ID
 ; often - add another IR file with a different DW_OP_convert that's otherwise
 ; identical and demonstrate that they have different DWO IDs.
 
-; SPLIT: 0x00000000: Compile Unit: {{.*}} DWO_id = 0x693879c39196a3ff
+; SPLIT: 0x00000000: Compile Unit: {{.*}} DWO_id = 0xecf2563326b0bdd3
 
 ; Regression testing a fairly quirky bug where instead of hashing (see above),
 ; extra bytes would be emitted into the output assembly in no
 ; particular/intentional section - so let's check they don't show up at all:
 ; ASM-NOT: .asciz  "\200\200\200"
 
 ; CHECK: 0x{{0*}}[[TYPE:.*]]: DW_TAG_base_type
 ; CHECK-NEXT:                   DW_AT_name ("DW_ATE_unsigned_32")

 attributes #0 = { uwtable "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "frame-pointer"="none" "less-precise-fpmad"="false" "min-legal-vector-width"="0" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }
 attributes #1 = { "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "frame-pointer"="none" "less-precise-fpmad"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }
 attributes #2 = { nounwind readnone speculatable willreturn }
 
 !llvm.dbg.cu = !{!0}
 !llvm.module.flags = !{!7, !8, !9}
 !llvm.ident = !{!10}
 
-!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, producer: "clang version 11.0.0 ([e-mail]:llvm/llvm-project.git edc3f4f02e54c2ae1067f60f6a0ed6caf5b92ef6)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !3, splitDebugInlining: false, nameTableKind: None)
+!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, producer: "clang version 11.0.0 ([e-mail]:llvm/llvm-project.git edc3f4f02e54c2ae1067f60f6a0ed6caf5b92ef6)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None)
 !1 = !DIFile(filename: "loc.cpp", directory: "/usr/local/google/home/blaikie/dev/scratch")
 !2 = !{}
-!3 = !{!4}
 !4 = !DISubprogram(name: "f1", linkageName: "_Z2f1v", scope: !1, file: !1, line: 1, type: !5, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !2)
 !5 = !DISubroutineType(types: !6)
 !6 = !{null}
 !7 = !{i32 7, !"Dwarf Version", i32 5}
 !8 = !{i32 2, !"Debug Info Version", i32 3}
 !9 = !{i32 1, !"wchar_size", i32 4}
 !10 = !{!"clang version 11.0.0 ([e-mail]:llvm/llvm-project.git edc3f4f02e54c2ae1067f60f6a0ed6caf5b92ef6)"}
 !11 = distinct !DISubprogram(name: "f2", linkageName: "_Z2f2v", scope: !1, file: !1, line: 2, type: !5, scopeLine: 2, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !12)
 !12 = !{!13}
 !13 = !DILocalVariable(name: "x", scope: !11, file: !1, line: 3, type: !14)
 !14 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
 !15 = !DILocation(line: 4, column: 3, scope: !11)
 !16 = !DILocation(line: 0, scope: !11)
 !17 = !DILocation(line: 6, column: 3, scope: !11)
 !18 = !DILocation(line: 7, column: 1, scope: !11)