[AIX][XCOFF] emit symbol visibility for xcoff object file.

[jasonliu]

llvm/lib/MC/MCXCOFFStreamer.cpp

39 ↗

(On Diff #279619)

Some thoughts on how to implement this for object generation:
If we want to follow existing practice, the closest thing we could find is StorageClass.
Both symbol and section have storage class, but how we set them are different.
For sections, we set the storage class when we create them. For symbols, we set it using emitSymbolAttribute.
So if we want to follow existing practice, we want to set the visibility with getXCOFFSection.

But if we want to break the existing practice (which could be a bigger change), we could consider using getQualNameSymbol as proxy of the MCSection.
So we only set attribute or property on MCSymbolXCOFF when possible, and in obj gen, we use getQualNameSymbol to get the property that we need for the section.
But the problem with that is the external symbols. We use external function entry point symbols as if they are labels, but in fact, they are csects. So getQualNameSymbol for an external function entry point symbol would not return the symbol that have the correct settings on it. So maybe this is one motivation for us to change .bl .foo to .bl .foo[PR] for external symbols.

As it is right now, if we seeking for minimum work and keep things consistent, we could set the visibility using getXCOFFSection. And if later we think it's important enough to pursue using getQualNameSymbol as proxy of the MCSection, we could do a refactoring at that time?

[DiggerLin]

llvm/lib/MC/MCXCOFFStreamer.cpp

39 ↗

(On Diff #279619)

there are

XCOFF::StorageMappingClass MappingClass;
XCOFF::SymbolType Type;
XCOFF::StorageClass StorageClass;
XCOFF::VisibilityType VisibilityType = XCOFF::SYM_V_UNSPECIFIED;

in the MCSectionXCOFF class,
the four attribute only used in the XCOFFObjectWriter, (asm path do not need the StorageClass)

we need get the value of StorageClass, Type,MappingClass before we invoke the getXCOFFSection every time.

actually for the StorageClass, we can set the value of StorageClass when set the
MCXCOFFStreamer::emitSymbolAttribute(). (for common link we can set at MCXCOFFStreamer::emitCommonSymbol).

if we want to refactor StorageClass later, I do not think we need to consistent with StorageClass in this patch. we can do NFC after this patch for StorageClass.

[jasonliu]

llvm/lib/MC/MCXCOFFStreamer.cpp

39 ↗

(On Diff #279619)

I don't want the setting of MCSectionXCOFF to be different for different property.
So if we do not want to pursue the proxy of MCSymbolXCOFF for now, we should make them consistent.
Or we could do the refactoring first.
This middle state is not what we want.

[jasonliu]

llvm/include/llvm/MC/MCSectionXCOFF.h

67

nit: Address Lint comment.

llvm/lib/MC/XCOFFObjectWriter.cpp

568–571

These comments need to be removed or updated.

604–607

Same as above.

[DiggerLin]

address comment

[jasonliu]

llvm/lib/MC/XCOFFObjectWriter.cpp

570–571

Space is needed after ','
Suggestion for comments: ... we only set bits 0-3 for symbol's visibility and leave other bits to zero.

605–607

Remove this line.

606

Keep it in sync with the above comments.

[jasonliu]

LGTM.

[hubert.reinterpretcast]

llvm/test/CodeGen/PowerPC/aix-xcoff-visibility.ll

76

Generating visibility in XCOFF32 requires the auxiliary header. The test needs to check the auxiliary header. @DiggerLin, @jasonliu, fya.

[hubert.reinterpretcast]

llvm/lib/MC/XCOFFObjectWriter.cpp

570

This should be expressed as the "four most significant bits" instead of "bits 0-3" to avoid confusion in terms of bit numbering convention.

606

Same comment.

[DiggerLin]

llvm/test/CodeGen/PowerPC/aix-xcoff-visibility.ll

76

1. do we want to generate old 32bits xcoff object file format? if we only want to generate the new 32bits xcoff object file and 64 bit xcoff object file. we can use new 32bits and 64 bits xcoff's interpret to generate the n_type here and and set the o_vstamp field to 2 when we generate the auxiliary header later

2. for decode symbol table entry , the n_type , if we want to decode the old 32 bits xcoff object file. we need to parse the o_vstamp of auxiliary header first and interpret the n_type based on the value of o_vstamp .

@hubert.reinterpretcast

llvm/include/llvm/MC/MCSectionXCOFF.h

public:
   ~MCSectionXCOFF();
 
   static bool classof(const MCSection *S) {
     return S->getVariant() == SV_XCOFF;
   }
 
   XCOFF::StorageMappingClass getMappingClass() const { return MappingClass; }
   XCOFF::StorageClass getStorageClass() const {
     return QualName->getStorageClass();
   }
+
+  XCOFF::VisibilityType getVisibilityType() const {
+    return QualName->getVisibilityType();
+  }
+
   XCOFF::SymbolType getCSectType() const { return Type; }
   MCSymbolXCOFF *getQualNameSymbol() const { return QualName; }
 
   void PrintSwitchToSection(const MCAsmInfo &MAI, const Triple &T,
                             raw_ostream &OS,
                             const MCExpr *Subsection) const override;
   bool UseCodeAlign() const override;
   bool isVirtualSection() const override;
   StringRef getSymbolTableName() const { return SymbolTableName; }
 };
 
 } // end namespace llvm
 
 #endif

llvm/lib/MC/XCOFFObjectWriter.cpp

 // Wrapper around an MCSymbolXCOFF.
 struct Symbol {
   const MCSymbolXCOFF *const MCSym;
   uint32_t SymbolTableIndex;
 
   XCOFF::StorageClass getStorageClass() const {
     return MCSym->getStorageClass();
   }
+
+  XCOFF::VisibilityType getVisibilityType() const {
+    return MCSym->getVisibilityType();
+  }
+
   StringRef getSymbolTableName() const { return MCSym->getSymbolTableName(); }
   Symbol(const MCSymbolXCOFF *MCSym) : MCSym(MCSym), SymbolTableIndex(-1) {}
 };
 
 // Wrapper for an MCSectionXCOFF.
 struct ControlSection {
   const MCSectionXCOFF *const MCCsect;
   uint32_t SymbolTableIndex;
void XCOFFObjectWriter::writeSymbolTableEntryForCsectMemberLabel(
     const Symbol &SymbolRef, const ControlSection &CSectionRef,
     int16_t SectionIndex, uint64_t SymbolOffset) {
   // Name or Zeros and string table offset
   writeSymbolName(SymbolRef.getSymbolTableName());
   assert(SymbolOffset <= UINT32_MAX - CSectionRef.Address &&
          "Symbol address overflows.");
   W.write<uint32_t>(CSectionRef.Address + SymbolOffset);
   W.write<int16_t>(SectionIndex);
   // Basic/Derived type. See the description of the n_type field for symbol
-  // table entries for a detailed description. Since we don't yet support
-  // visibility, and all other bits are either optionally set or reserved, this
-  // is always zero.
-  // TODO FIXME How to assert a symbol's visibilty is default?
+  // table entries for a detailed description. Since we support visibility, and
+  // all other bits are either optionally set or reserved, we only set bits 0-3
+  // for symbol's visibility and leave other bits to zero.
   // TODO Set the function indicator (bit 10, 0x0020) for functions
   // when debugging is enabled.
-  W.write<uint16_t>(0);
+  W.write<uint16_t>(SymbolRef.getVisibilityType());
   W.write<uint8_t>(SymbolRef.getStorageClass());
   // Always 1 aux entry for now.
   W.write<uint8_t>(1);
 
   // Now output the auxiliary entry.
   W.write<uint32_t>(CSectionRef.SymbolTableIndex);
   // Parameter typecheck hash. Not supported.
   W.write<uint32_t>(0);
void XCOFFObjectWriter::writeSymbolTableEntryForControlSection(
     const ControlSection &CSectionRef, int16_t SectionIndex,
     XCOFF::StorageClass StorageClass) {
   // n_name, n_zeros, n_offset
   writeSymbolName(CSectionRef.getSymbolTableName());
   // n_value
   W.write<uint32_t>(CSectionRef.Address);
   // n_scnum
   W.write<int16_t>(SectionIndex);
   // Basic/Derived type. See the description of the n_type field for symbol
-  // table entries for a detailed description. Since we don't yet support
-  // visibility, and all other bits are either optionally set or reserved, this
-  // is always zero.
-  // TODO FIXME How to assert a symbol's visibilty is default?
+  // table entries for a detailed description. Since we support visibility, and
+  // all other bits are either optionally set or reserved, we only set bits 0-3
+  // for symbol's visibility and leave other bits to zero.
   // TODO Set the function indicator (bit 10, 0x0020) for functions
   // when debugging is enabled.
-  W.write<uint16_t>(0);
+  W.write<uint16_t>(CSectionRef.MCCsect->getVisibilityType());
   // n_sclass
   W.write<uint8_t>(StorageClass);
   // Always 1 aux entry for now.
   W.write<uint8_t>(1);
 
   // Now output the auxiliary entry.
   W.write<uint32_t>(CSectionRef.Size);
   // Parameter typecheck hash. Not supported.

llvm/test/CodeGen/PowerPC/aix-xcoff-visibility.ll

 ; RUN: llc -verify-machineinstrs -mtriple powerpc-ibm-aix-xcoff -mcpu=pwr4 -mattr=-altivec < %s | \
 ; RUN:   FileCheck %s
 ; RUN: llc -verify-machineinstrs -mtriple powerpc64-ibm-aix-xcoff -mcpu=pwr4 -mattr=-altivec < %s |\
 ; RUN:   FileCheck %s
 
+; RUN: llc -verify-machineinstrs -mtriple powerpc-ibm-aix-xcoff -mcpu=pwr4 \
+; RUN:     -mattr=-altivec -filetype=obj -o %t.o < %s
+; RUN: llvm-readobj --symbols %t.o | \
+; RUN:   FileCheck --check-prefix=XCOFF32 %s
+
+; RUN: not --crash llc -verify-machineinstrs -mtriple powerpc64-ibm-aix-xcoff \
+; RUN:     -mcpu=pwr4 -mattr=-altivec -filetype=obj -o %t.o 2>&1 < %s | \
+; RUN:   FileCheck --check-prefix=XCOFF64 %s
+; XCOFF64: LLVM ERROR: 64-bit XCOFF object files are not supported yet.
+
 @b =  global i32 0, align 4
 @b_h = hidden global i32 0, align 4
 
 define void @foo() {
 entry:
   ret void
 }
 

 
 ; CHECK:        .globl  b{{[[:space:]]*([#].*)?$}}
 ; CHECK:        .globl  b_h,hidden
 
 ; CHECK:        .weak   .zoo_weak_extern_h[PR],hidden
 ; CHECK:        .weak   zoo_weak_extern_h[DS],hidden
 ; CHECK:        .extern .bar_h[PR],hidden
 ; CHECK:        .extern bar_h[DS],hidden
+
+; XCOFF32:       Symbols [
+; XCOFF32-NEXT:   Symbol {
+; XCOFF32-NEXT:     Index: [[#Index:]]
+; XCOFF32-NEXT:     Name: .bar_h
+; XCOFF32-NEXT:     Value (RelocatableAddress): 0x0
+; XCOFF32-NEXT:     Section: N_UNDEF
+; XCOFF32-NEXT:     Type: 0x2000
+; XCOFF32-NEXT:     StorageClass: C_EXT (0x2)
+; XCOFF32-NEXT:     NumberOfAuxEntries: 1
+; XCOFF32-NEXT:     CSECT Auxiliary Entry {
+; XCOFF32-NEXT:       Index: [[#Index+1]]
+; XCOFF32-NEXT:       SectionLen: 0
+; XCOFF32-NEXT:       ParameterHashIndex: 0x0
+; XCOFF32-NEXT:       TypeChkSectNum: 0x0
+; XCOFF32-NEXT:       SymbolAlignmentLog2: 0
+; XCOFF32-NEXT:       SymbolType: XTY_ER (0x0)
+; XCOFF32-NEXT:       StorageMappingClass: XMC_PR (0x0)
+; XCOFF32-NEXT:       StabInfoIndex: 0x0
+; XCOFF32-NEXT:       StabSectNum: 0x0
+; XCOFF32-NEXT:     }
+; XCOFF32-NEXT:   }
+; XCOFF32-NEXT:   Symbol {
+; XCOFF32-NEXT:     Index: [[#Index+2]]
+; XCOFF32-NEXT:     Name: zoo_weak_extern_h
+; XCOFF32-NEXT:     Value (RelocatableAddress): 0x0
+; XCOFF32-NEXT:     Section: N_UNDEF
+; XCOFF32-NEXT:     Type: 0x2000
+; XCOFF32-NEXT:     StorageClass: C_WEAKEXT (0x6F)
+; XCOFF32-NEXT:     NumberOfAuxEntries: 1
+; XCOFF32-NEXT:     CSECT Auxiliary Entry {
+; XCOFF32-NEXT:       Index: [[#Index+3]]
+; XCOFF32-NEXT:       SectionLen: 0
+; XCOFF32-NEXT:       ParameterHashIndex: 0x0
+; XCOFF32-NEXT:       TypeChkSectNum: 0x0
+; XCOFF32-NEXT:       SymbolAlignmentLog2: 0
+; XCOFF32-NEXT:       SymbolType: XTY_ER (0x0)
+; XCOFF32-NEXT:       StorageMappingClass: XMC_DS (0xA)
+; XCOFF32-NEXT:       StabInfoIndex: 0x0
+; XCOFF32-NEXT:       StabSectNum: 0x0
+; XCOFF32-NEXT:     }
+; XCOFF32-NEXT:   }
+; XCOFF32-NEXT:   Symbol {
+; XCOFF32-NEXT:     Index: [[#Index+4]]
+; XCOFF32-NEXT:     Name: .zoo_weak_extern_h
+; XCOFF32-NEXT:     Value (RelocatableAddress): 0x0
+; XCOFF32-NEXT:     Section: N_UNDEF
+; XCOFF32-NEXT:     Type: 0x2000
+; XCOFF32-NEXT:     StorageClass: C_WEAKEXT (0x6F)
+; XCOFF32-NEXT:     NumberOfAuxEntries: 1
+; XCOFF32-NEXT:     CSECT Auxiliary Entry {
+; XCOFF32-NEXT:       Index: [[#Index+5]]
+; XCOFF32-NEXT:       SectionLen: 0
+; XCOFF32-NEXT:       ParameterHashIndex: 0x0
+; XCOFF32-NEXT:       TypeChkSectNum: 0x0
+; XCOFF32-NEXT:       SymbolAlignmentLog2: 0
+; XCOFF32-NEXT:       SymbolType: XTY_ER (0x0)
+; XCOFF32-NEXT:       StorageMappingClass: XMC_PR (0x0)
+; XCOFF32-NEXT:       StabInfoIndex: 0x0
+; XCOFF32-NEXT:       StabSectNum: 0x0
+; XCOFF32-NEXT:     }
+; XCOFF32-NEXT:   }
+; XCOFF32-NEXT:   Symbol {
+; XCOFF32-NEXT:     Index: [[#Index+6]]
+; XCOFF32-NEXT:     Name: bar_h
+; XCOFF32-NEXT:     Value (RelocatableAddress): 0x0
+; XCOFF32-NEXT:     Section: N_UNDEF
+; XCOFF32-NEXT:     Type: 0x2000
+; XCOFF32-NEXT:     StorageClass: C_EXT (0x2)
+; XCOFF32-NEXT:     NumberOfAuxEntries: 1
+; XCOFF32-NEXT:     CSECT Auxiliary Entry {
+; XCOFF32-NEXT:       Index: [[#Index+7]]
+; XCOFF32-NEXT:       SectionLen: 0
+; XCOFF32-NEXT:       ParameterHashIndex: 0x0
+; XCOFF32-NEXT:       TypeChkSectNum: 0x0
+; XCOFF32-NEXT:       SymbolAlignmentLog2: 0
+; XCOFF32-NEXT:       SymbolType: XTY_ER (0x0)
+; XCOFF32-NEXT:       StorageMappingClass: XMC_DS (0xA)
+; XCOFF32-NEXT:       StabInfoIndex: 0x0
+; XCOFF32-NEXT:       StabSectNum: 0x0
+; XCOFF32-NEXT:     }
+; XCOFF32-NEXT:   }
+; XCOFF32-NEXT:   Symbol {
+; XCOFF32-NEXT:     Index: [[#Index+8]]
+; XCOFF32-NEXT:     Name: .text
+; XCOFF32-NEXT:     Value (RelocatableAddress): 0x0
+; XCOFF32-NEXT:     Section: .text
+; XCOFF32-NEXT:     Type: 0x0
+; XCOFF32-NEXT:     StorageClass: C_HIDEXT (0x6B)
+; XCOFF32-NEXT:     NumberOfAuxEntries: 1
+; XCOFF32-NEXT:     CSECT Auxiliary Entry {
+; XCOFF32-NEXT:       Index: [[#Index+9]]
+; XCOFF32-NEXT:       SectionLen: 152
+; XCOFF32-NEXT:       ParameterHashIndex: 0x0
+; XCOFF32-NEXT:       TypeChkSectNum: 0x0
+; XCOFF32-NEXT:       SymbolAlignmentLog2: 4
+; XCOFF32-NEXT:       SymbolType: XTY_SD (0x1)
+; XCOFF32-NEXT:       StorageMappingClass: XMC_PR (0x0)
+; XCOFF32-NEXT:       StabInfoIndex: 0x0
+; XCOFF32-NEXT:       StabSectNum: 0x0
+; XCOFF32-NEXT:     }
+; XCOFF32-NEXT:   }
+; XCOFF32-NEXT:   Symbol {
+; XCOFF32-NEXT:     Index: [[#Index+10]]
+; XCOFF32-NEXT:     Name: .foo
+; XCOFF32-NEXT:     Value (RelocatableAddress): 0x0
+; XCOFF32-NEXT:     Section: .text
+; XCOFF32-NEXT:     Type: 0x0
+; XCOFF32-NEXT:     StorageClass: C_EXT (0x2)
+; XCOFF32-NEXT:     NumberOfAuxEntries: 1
+; XCOFF32-NEXT:     CSECT Auxiliary Entry {
+; XCOFF32-NEXT:       Index: [[#Index+11]]
+; XCOFF32-NEXT:       ContainingCsectSymbolIndex: 8
+; XCOFF32-NEXT:       ParameterHashIndex: 0x0
+; XCOFF32-NEXT:       TypeChkSectNum: 0x0
+; XCOFF32-NEXT:       SymbolAlignmentLog2: 0
+; XCOFF32-NEXT:       SymbolType: XTY_LD (0x2)
+; XCOFF32-NEXT:       StorageMappingClass: XMC_PR (0x0)
+; XCOFF32-NEXT:       StabInfoIndex: 0x0
+; XCOFF32-NEXT:       StabSectNum: 0x0
+; XCOFF32-NEXT:     }
+; XCOFF32-NEXT:   }
+; XCOFF32-NEXT:   Symbol {
+; XCOFF32-NEXT:     Index: [[#Index+12]]
+; XCOFF32-NEXT:     Name: .foo_h
+; XCOFF32-NEXT:     Value (RelocatableAddress): 0x10
+; XCOFF32-NEXT:     Section: .text
+; XCOFF32-NEXT:     Type: 0x2000
+; XCOFF32-NEXT:     StorageClass: C_EXT (0x2)
+; XCOFF32-NEXT:     NumberOfAuxEntries: 1
+; XCOFF32-NEXT:     CSECT Auxiliary Entry {
+; XCOFF32-NEXT:       Index: [[#Index+13]]
+; XCOFF32-NEXT:       ContainingCsectSymbolIndex: 8
+; XCOFF32-NEXT:       ParameterHashIndex: 0x0
+; XCOFF32-NEXT:       TypeChkSectNum: 0x0
+; XCOFF32-NEXT:       SymbolAlignmentLog2: 0
+; XCOFF32-NEXT:       SymbolType: XTY_LD (0x2)
+; XCOFF32-NEXT:       StorageMappingClass: XMC_PR (0x0)
+; XCOFF32-NEXT:       StabInfoIndex: 0x0
+; XCOFF32-NEXT:       StabSectNum: 0x0
+; XCOFF32-NEXT:     }
+; XCOFF32-NEXT:   }
+; XCOFF32-NEXT:   Symbol {
+; XCOFF32-NEXT:     Index: [[#Index+14]]
+; XCOFF32-NEXT:     Name: .foo_protected
+; XCOFF32-NEXT:     Value (RelocatableAddress): 0x20
+; XCOFF32-NEXT:     Section: .text
+; XCOFF32-NEXT:     Type: 0x3000
+; XCOFF32-NEXT:     StorageClass: C_EXT (0x2)
+; XCOFF32-NEXT:     NumberOfAuxEntries: 1
+; XCOFF32-NEXT:     CSECT Auxiliary Entry {
+; XCOFF32-NEXT:       Index: [[#Index+15]]
+; XCOFF32-NEXT:       ContainingCsectSymbolIndex: 8
+; XCOFF32-NEXT:       ParameterHashIndex: 0x0
+; XCOFF32-NEXT:       TypeChkSectNum: 0x0
+; XCOFF32-NEXT:       SymbolAlignmentLog2: 0
+; XCOFF32-NEXT:       SymbolType: XTY_LD (0x2)
+; XCOFF32-NEXT:       StorageMappingClass: XMC_PR (0x0)
+; XCOFF32-NEXT:       StabInfoIndex: 0x0
+; XCOFF32-NEXT:       StabSectNum: 0x0
+; XCOFF32-NEXT:     }
+; XCOFF32-NEXT:   }
+; XCOFF32-NEXT:   Symbol {
+; XCOFF32-NEXT:     Index: [[#Index+16]]
+; XCOFF32-NEXT:     Name: .foo_weak_h
+; XCOFF32-NEXT:     Value (RelocatableAddress): 0x30
+; XCOFF32-NEXT:     Section: .text
+; XCOFF32-NEXT:     Type: 0x2000
+; XCOFF32-NEXT:     StorageClass: C_WEAKEXT (0x6F)
+; XCOFF32-NEXT:     NumberOfAuxEntries: 1
+; XCOFF32-NEXT:     CSECT Auxiliary Entry {
+; XCOFF32-NEXT:       Index: [[#Index+17]]
+; XCOFF32-NEXT:       ContainingCsectSymbolIndex: 8
+; XCOFF32-NEXT:       ParameterHashIndex: 0x0
+; XCOFF32-NEXT:       TypeChkSectNum: 0x0
+; XCOFF32-NEXT:       SymbolAlignmentLog2: 0
+; XCOFF32-NEXT:       SymbolType: XTY_LD (0x2)
+; XCOFF32-NEXT:       StorageMappingClass: XMC_PR (0x0)
+; XCOFF32-NEXT:       StabInfoIndex: 0x0
+; XCOFF32-NEXT:       StabSectNum: 0x0
+; XCOFF32-NEXT:     }
+; XCOFF32-NEXT:   }
+; XCOFF32-NEXT:   Symbol {
+; XCOFF32-NEXT:     Index: [[#Index+18]]
+; XCOFF32-NEXT:     Name: .main
+; XCOFF32-NEXT:     Value (RelocatableAddress): 0x40
+; XCOFF32-NEXT:     Section: .text
+; XCOFF32-NEXT:     Type: 0x0
+; XCOFF32-NEXT:     StorageClass: C_EXT (0x2)
+; XCOFF32-NEXT:     NumberOfAuxEntries: 1
+; XCOFF32-NEXT:     CSECT Auxiliary Entry {
+; XCOFF32-NEXT:       Index: [[#Index+19]]
+; XCOFF32-NEXT:       ContainingCsectSymbolIndex: 8
+; XCOFF32-NEXT:       ParameterHashIndex: 0x0
+; XCOFF32-NEXT:       TypeChkSectNum: 0x0
+; XCOFF32-NEXT:       SymbolAlignmentLog2: 0
+; XCOFF32-NEXT:       SymbolType: XTY_LD (0x2)
+; XCOFF32-NEXT:       StorageMappingClass: XMC_PR (0x0)
+; XCOFF32-NEXT:       StabInfoIndex: 0x0
+; XCOFF32-NEXT:       StabSectNum: 0x0
+; XCOFF32-NEXT:     }
+; XCOFF32-NEXT:   }
+; XCOFF32-NEXT:   Symbol {
+; XCOFF32-NEXT:     Index: [[#Index+20]]
+; XCOFF32-NEXT:     Name: .data
+; XCOFF32-NEXT:     Value (RelocatableAddress): 0x98
+; XCOFF32-NEXT:     Section: .data
+; XCOFF32-NEXT:     Type: 0x0
+; XCOFF32-NEXT:     StorageClass: C_HIDEXT (0x6B)
+; XCOFF32-NEXT:     NumberOfAuxEntries: 1
+; XCOFF32-NEXT:     CSECT Auxiliary Entry {
+; XCOFF32-NEXT:       Index: [[#Index+21]]
+; XCOFF32-NEXT:       SectionLen: 12
+; XCOFF32-NEXT:       ParameterHashIndex: 0x0
+; XCOFF32-NEXT:       TypeChkSectNum: 0x0
+; XCOFF32-NEXT:       SymbolAlignmentLog2: 2
+; XCOFF32-NEXT:       SymbolType: XTY_SD (0x1)
+; XCOFF32-NEXT:       StorageMappingClass: XMC_RW (0x5)
+; XCOFF32-NEXT:       StabInfoIndex: 0x0
+; XCOFF32-NEXT:       StabSectNum: 0x0
+; XCOFF32-NEXT:     }
+; XCOFF32-NEXT:   }
+; XCOFF32-NEXT:   Symbol {
+; XCOFF32-NEXT:     Index: [[#Index+22]]
+; XCOFF32-NEXT:     Name: b
+; XCOFF32-NEXT:     Value (RelocatableAddress): 0x98
+; XCOFF32-NEXT:     Section: .data
+; XCOFF32-NEXT:     Type: 0x0
+; XCOFF32-NEXT:     StorageClass: C_EXT (0x2)
+; XCOFF32-NEXT:     NumberOfAuxEntries: 1
+; XCOFF32-NEXT:     CSECT Auxiliary Entry {
+; XCOFF32-NEXT:       Index: [[#Index+23]]
+; XCOFF32-NEXT:       ContainingCsectSymbolIndex: 20
+; XCOFF32-NEXT:       ParameterHashIndex: 0x0
+; XCOFF32-NEXT:       TypeChkSectNum: 0x0
+; XCOFF32-NEXT:       SymbolAlignmentLog2: 0
+; XCOFF32-NEXT:       SymbolType: XTY_LD (0x2)
+; XCOFF32-NEXT:       StorageMappingClass: XMC_RW (0x5)
+; XCOFF32-NEXT:       StabInfoIndex: 0x0
+; XCOFF32-NEXT:       StabSectNum: 0x0
+; XCOFF32-NEXT:     }
+; XCOFF32-NEXT:   }
+; XCOFF32-NEXT:   Symbol {
+; XCOFF32-NEXT:     Index: [[#Index+24]]
+; XCOFF32-NEXT:     Name: b_h
+; XCOFF32-NEXT:     Value (RelocatableAddress): 0x9C
+; XCOFF32-NEXT:     Section: .data
+; XCOFF32-NEXT:     Type: 0x2000
+; XCOFF32-NEXT:     StorageClass: C_EXT (0x2)
+; XCOFF32-NEXT:     NumberOfAuxEntries: 1
+; XCOFF32-NEXT:     CSECT Auxiliary Entry {
+; XCOFF32-NEXT:       Index: [[#Index+25]]
+; XCOFF32-NEXT:       ContainingCsectSymbolIndex: 20
+; XCOFF32-NEXT:       ParameterHashIndex: 0x0
+; XCOFF32-NEXT:       TypeChkSectNum: 0x0
+; XCOFF32-NEXT:       SymbolAlignmentLog2: 0
+; XCOFF32-NEXT:       SymbolType: XTY_LD (0x2)
+; XCOFF32-NEXT:       StorageMappingClass: XMC_RW (0x5)
+; XCOFF32-NEXT:       StabInfoIndex: 0x0
+; XCOFF32-NEXT:       StabSectNum: 0x0
+; XCOFF32-NEXT:     }
+; XCOFF32-NEXT:   }
+; XCOFF32-NEXT:   Symbol {
+; XCOFF32-NEXT:     Index: [[#Index+26]]
+; XCOFF32-NEXT:     Name: foo_p
+; XCOFF32-NEXT:     Value (RelocatableAddress): 0xA0
+; XCOFF32-NEXT:     Section: .data
+; XCOFF32-NEXT:     Type: 0x0
+; XCOFF32-NEXT:     StorageClass: C_EXT (0x2)
+; XCOFF32-NEXT:     NumberOfAuxEntries: 1
+; XCOFF32-NEXT:     CSECT Auxiliary Entry {
+; XCOFF32-NEXT:       Index: [[#Index+27]]
+; XCOFF32-NEXT:       ContainingCsectSymbolIndex: 20
+; XCOFF32-NEXT:       ParameterHashIndex: 0x0
+; XCOFF32-NEXT:       TypeChkSectNum: 0x0
+; XCOFF32-NEXT:       SymbolAlignmentLog2: 0
+; XCOFF32-NEXT:       SymbolType: XTY_LD (0x2)
+; XCOFF32-NEXT:       StorageMappingClass: XMC_RW (0x5)
+; XCOFF32-NEXT:       StabInfoIndex: 0x0
+; XCOFF32-NEXT:       StabSectNum: 0x0
+; XCOFF32-NEXT:     }
+; XCOFF32-NEXT:   }
+; XCOFF32-NEXT:   Symbol {
+; XCOFF32-NEXT:     Index: [[#Index+28]]
+; XCOFF32-NEXT:     Name: foo
+; XCOFF32-NEXT:     Value (RelocatableAddress): 0xA4
+; XCOFF32-NEXT:     Section: .data
+; XCOFF32-NEXT:     Type: 0x0
+; XCOFF32-NEXT:     StorageClass: C_EXT (0x2)
+; XCOFF32-NEXT:     NumberOfAuxEntries: 1
+; XCOFF32-NEXT:     CSECT Auxiliary Entry {
+; XCOFF32-NEXT:       Index: [[#Index+29]]
+; XCOFF32-NEXT:       SectionLen: 12
+; XCOFF32-NEXT:       ParameterHashIndex: 0x0
+; XCOFF32-NEXT:       TypeChkSectNum: 0x0
+; XCOFF32-NEXT:       SymbolAlignmentLog2: 2
+; XCOFF32-NEXT:       SymbolType: XTY_SD (0x1)
+; XCOFF32-NEXT:       StorageMappingClass: XMC_DS (0xA)
+; XCOFF32-NEXT:       StabInfoIndex: 0x0
+; XCOFF32-NEXT:       StabSectNum: 0x0
+; XCOFF32-NEXT:     }
+; XCOFF32-NEXT:   }
+; XCOFF32-NEXT:   Symbol {
+; XCOFF32-NEXT:     Index: [[#Index+30]]
+; XCOFF32-NEXT:     Name: foo_h
+; XCOFF32-NEXT:     Value (RelocatableAddress): 0xB0
+; XCOFF32-NEXT:     Section: .data
+; XCOFF32-NEXT:     Type: 0x2000
+; XCOFF32-NEXT:     StorageClass: C_EXT (0x2)
+; XCOFF32-NEXT:     NumberOfAuxEntries: 1
+; XCOFF32-NEXT:     CSECT Auxiliary Entry {
+; XCOFF32-NEXT:       Index: [[#Index+31]]
+; XCOFF32-NEXT:       SectionLen: 12
+; XCOFF32-NEXT:       ParameterHashIndex: 0x0
+; XCOFF32-NEXT:       TypeChkSectNum: 0x0
+; XCOFF32-NEXT:       SymbolAlignmentLog2: 2
+; XCOFF32-NEXT:       SymbolType: XTY_SD (0x1)
+; XCOFF32-NEXT:       StorageMappingClass: XMC_DS (0xA)
+; XCOFF32-NEXT:       StabInfoIndex: 0x0
+; XCOFF32-NEXT:       StabSectNum: 0x0
+; XCOFF32-NEXT:     }
+; XCOFF32-NEXT:   }
+; XCOFF32-NEXT:   Symbol {
+; XCOFF32-NEXT:     Index: [[#Index+32]]
+; XCOFF32-NEXT:     Name: foo_protected
+; XCOFF32-NEXT:     Value (RelocatableAddress): 0xBC
+; XCOFF32-NEXT:     Section: .data
+; XCOFF32-NEXT:     Type: 0x3000
+; XCOFF32-NEXT:     StorageClass: C_EXT (0x2)
+; XCOFF32-NEXT:     NumberOfAuxEntries: 1
+; XCOFF32-NEXT:     CSECT Auxiliary Entry {
+; XCOFF32-NEXT:       Index: [[#Index+33]]
+; XCOFF32-NEXT:       SectionLen: 12
+; XCOFF32-NEXT:       ParameterHashIndex: 0x0
+; XCOFF32-NEXT:       TypeChkSectNum: 0x0
+; XCOFF32-NEXT:       SymbolAlignmentLog2: 2
+; XCOFF32-NEXT:       SymbolType: XTY_SD (0x1)
+; XCOFF32-NEXT:       StorageMappingClass: XMC_DS (0xA)
+; XCOFF32-NEXT:       StabInfoIndex: 0x0
+; XCOFF32-NEXT:       StabSectNum: 0x0
+; XCOFF32-NEXT:     }
+; XCOFF32-NEXT:   }
+; XCOFF32-NEXT:   Symbol {
+; XCOFF32-NEXT:     Index: [[#Index+34]]
+; XCOFF32-NEXT:     Name: foo_weak_h
+; XCOFF32-NEXT:     Value (RelocatableAddress): 0xC8
+; XCOFF32-NEXT:     Section: .data
+; XCOFF32-NEXT:     Type: 0x2000
+; XCOFF32-NEXT:     StorageClass: C_WEAKEXT (0x6F)
+; XCOFF32-NEXT:     NumberOfAuxEntries: 1
+; XCOFF32-NEXT:     CSECT Auxiliary Entry {
+; XCOFF32-NEXT:       Index: [[#Index+35]]
+; XCOFF32-NEXT:       SectionLen: 12
+; XCOFF32-NEXT:       ParameterHashIndex: 0x0
+; XCOFF32-NEXT:       TypeChkSectNum: 0x0
+; XCOFF32-NEXT:       SymbolAlignmentLog2: 2
+; XCOFF32-NEXT:       SymbolType: XTY_SD (0x1)
+; XCOFF32-NEXT:       StorageMappingClass: XMC_DS (0xA)
+; XCOFF32-NEXT:       StabInfoIndex: 0x0
+; XCOFF32-NEXT:       StabSectNum: 0x0
+; XCOFF32-NEXT:     }
+; XCOFF32-NEXT:   }
+; XCOFF32-NEXT:   Symbol {
+; XCOFF32-NEXT:     Index: [[#Index+36]]
+; XCOFF32-NEXT:     Name: main
+; XCOFF32-NEXT:     Value (RelocatableAddress): 0xD4
+; XCOFF32-NEXT:     Section: .data
+; XCOFF32-NEXT:     Type: 0x0
+; XCOFF32-NEXT:     StorageClass: C_EXT (0x2)
+; XCOFF32-NEXT:     NumberOfAuxEntries: 1
+; XCOFF32-NEXT:     CSECT Auxiliary Entry {
+; XCOFF32-NEXT:       Index: [[#Index+37]]
+; XCOFF32-NEXT:       SectionLen: 12
+; XCOFF32-NEXT:       ParameterHashIndex: 0x0
+; XCOFF32-NEXT:       TypeChkSectNum: 0x0
+; XCOFF32-NEXT:       SymbolAlignmentLog2: 2
+; XCOFF32-NEXT:       SymbolType: XTY_SD (0x1)
+; XCOFF32-NEXT:       StorageMappingClass: XMC_DS (0xA)
+; XCOFF32-NEXT:       StabInfoIndex: 0x0
+; XCOFF32-NEXT:       StabSectNum: 0x0
+; XCOFF32-NEXT:     }
+; XCOFF32-NEXT:   }
+; XCOFF32-NEXT:   Symbol {
+; XCOFF32-NEXT:     Index: [[#Index+38]]
+; XCOFF32-NEXT:     Name: TOC
+; XCOFF32-NEXT:     Value (RelocatableAddress): 0xE0
+; XCOFF32-NEXT:     Section: .data
+; XCOFF32-NEXT:     Type: 0x0
+; XCOFF32-NEXT:     StorageClass: C_HIDEXT (0x6B)
+; XCOFF32-NEXT:     NumberOfAuxEntries: 1
+; XCOFF32-NEXT:     CSECT Auxiliary Entry {
+; XCOFF32-NEXT:       Index: [[#Index+39]]
+; XCOFF32-NEXT:       SectionLen: 0
+; XCOFF32-NEXT:       ParameterHashIndex: 0x0
+; XCOFF32-NEXT:       TypeChkSectNum: 0x0
+; XCOFF32-NEXT:       SymbolAlignmentLog2: 2
+; XCOFF32-NEXT:       SymbolType: XTY_SD (0x1)
+; XCOFF32-NEXT:       StorageMappingClass: XMC_TC0 (0xF)
+; XCOFF32-NEXT:       StabInfoIndex: 0x0
+; XCOFF32-NEXT:       StabSectNum: 0x0
+; XCOFF32-NEXT:     }
+; XCOFF32-NEXT:   }
+; XCOFF32-NEXT:   Symbol {
+; XCOFF32-NEXT:     Index: [[#Index+40]]
+; XCOFF32-NEXT:     Name: b_h
+; XCOFF32-NEXT:     Value (RelocatableAddress): 0xE0
+; XCOFF32-NEXT:     Section: .data
+; XCOFF32-NEXT:     Type: 0x0
+; XCOFF32-NEXT:     StorageClass: C_HIDEXT (0x6B)
+; XCOFF32-NEXT:     NumberOfAuxEntries: 1
+; XCOFF32-NEXT:     CSECT Auxiliary Entry {
+; XCOFF32-NEXT:       Index: [[#Index+41]]
+; XCOFF32-NEXT:       SectionLen: 4
+; XCOFF32-NEXT:       ParameterHashIndex: 0x0
+; XCOFF32-NEXT:       TypeChkSectNum: 0x0
+; XCOFF32-NEXT:       SymbolAlignmentLog2: 2
+; XCOFF32-NEXT:       SymbolType: XTY_SD (0x1)
+; XCOFF32-NEXT:       StorageMappingClass: XMC_TC (0x3)
+; XCOFF32-NEXT:       StabInfoIndex: 0x0
+; XCOFF32-NEXT:       StabSectNum: 0x0
+; XCOFF32-NEXT:     }
+; XCOFF32-NEXT:   }
+; XCOFF32-NEXT:   Symbol {
+; XCOFF32-NEXT:     Index: [[#Index+42]]
+; XCOFF32-NEXT:     Name: foo_p
+; XCOFF32-NEXT:     Value (RelocatableAddress): 0xE4
+; XCOFF32-NEXT:     Section: .data
+; XCOFF32-NEXT:     Type: 0x0
+; XCOFF32-NEXT:     StorageClass: C_HIDEXT (0x6B)
+; XCOFF32-NEXT:     NumberOfAuxEntries: 1
+; XCOFF32-NEXT:     CSECT Auxiliary Entry {
+; XCOFF32-NEXT:       Index: [[#Index+43]]
+; XCOFF32-NEXT:       SectionLen: 4
+; XCOFF32-NEXT:       ParameterHashIndex: 0x0
+; XCOFF32-NEXT:       TypeChkSectNum: 0x0
+; XCOFF32-NEXT:       SymbolAlignmentLog2: 2
+; XCOFF32-NEXT:       SymbolType: XTY_SD (0x1)
+; XCOFF32-NEXT:       StorageMappingClass: XMC_TC (0x3)
+; XCOFF32-NEXT:       StabInfoIndex: 0x0
+; XCOFF32-NEXT:       StabSectNum: 0x0
+; XCOFF32-NEXT:     }
+; XCOFF32-NEXT:   }
+; XCOFF32-NEXT: ]