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llvm-mirror/test/MC/COFF/section-comdat.s
Saleem Abdulrasool 542dba4868 MC: prevent early DCE of empty sections
Prevent the early elimination of sections in the object writer.  There may be
references to the section itself by other symbols, which may potentially not be
possible to resolve.  ML (Visual Studio's Macro Assembler) also seems to retain
empty sections.

The elimination of symbols and sections which are unused should really occur at
the link phase.  This will not cause any change in the resulting binary, simply
in the generated object files.

The adjustments to the other unit tests account for the fluctuating section
index caused by the appearance of sections which were previously discarded.

llvm-svn: 210373
2014-06-06 21:40:16 +00:00

192 lines
4.4 KiB
ArmAsm

// RUN: llvm-mc -triple i386-pc-win32 -filetype=obj %s | llvm-readobj -s -t | FileCheck %s
// RUN: llvm-mc -triple x86_64-pc-win32 -filetype=obj %s | llvm-readobj -s -t | FileCheck %s
.section assocSec, "dr", discard, "assocSym"
.long 1
.section secName, "dr", discard, "Symbol1"
.globl Symbol1
Symbol1:
.long 1
.section secName, "dr", one_only, "Symbol2"
.globl Symbol2
Symbol2:
.long 1
.section SecName, "dr", same_size, "Symbol3"
.globl Symbol3
Symbol3:
.long 1
.section SecName, "dr", same_contents, "Symbol4"
.globl Symbol4
Symbol4:
.long 1
.section SecName, "dr", associative, "assocSym"
.globl Symbol5
Symbol5:
.long 1
.section SecName, "dr", largest, "Symbol6"
.globl Symbol6
Symbol6:
.long 1
.section SecName, "dr", newest, "Symbol7"
.globl Symbol7
Symbol7:
.long 1
// CHECK: Sections [
// CHECK: Section {
// CHECK: Number: 4
// CHECK: Name: assocSec
// CHECK: Characteristics [
// CHECK: IMAGE_SCN_LNK_COMDAT
// CHECK: ]
// CHECK: }
// CHECK: Section {
// CHECK: Number: 5
// CHECK: Name: secName
// CHECK: Characteristics [
// CHECK: IMAGE_SCN_LNK_COMDAT
// CHECK: ]
// CHECK: }
// CHECK: Section {
// CHECK: Number: 6
// CHECK: Name: secName
// CHECK: Characteristics [
// CHECK: IMAGE_SCN_LNK_COMDAT
// CHECK: ]
// CHECK: }
// CHECK: Section {
// CHECK: Number: 7
// CHECK: Name: SecName
// CHECK: Characteristics [
// CHECK: IMAGE_SCN_LNK_COMDAT
// CHECK: ]
// CHECK: }
// CHECK: Section {
// CHECK: Number: 8
// CHECK: Name: SecName
// CHECK: Characteristics [
// CHECK: IMAGE_SCN_LNK_COMDAT
// CHECK: ]
// CHECK: }
// CHECK: Section {
// CHECK: Number: 9
// CHECK: Name: SecName
// CHECK: Characteristics [
// CHECK: IMAGE_SCN_LNK_COMDAT
// CHECK: ]
// CHECK: }
// CHECK: Section {
// CHECK: Number: 10
// CHECK: Name: SecName
// CHECK: Characteristics [
// CHECK: IMAGE_SCN_LNK_COMDAT
// CHECK: ]
// CHECK: }
// CHECK: Section {
// CHECK: Number: 11
// CHECK: Name: SecName
// CHECK: Characteristics [
// CHECK: IMAGE_SCN_LNK_COMDAT
// CHECK: ]
// CHECK: }
// CHECK: ]
// CHECK: Symbols [
// CHECK: Symbol {
// CHECK: Name: assocSec
// CHECK: Section: assocSec (4)
// CHECK: AuxSectionDef {
// CHECK: Selection: Any
// CHECK: }
// CHECK: }
// CHECK: Symbol {
// CHECK: Name: assocSym
// CHECK: Section: assocSec
// CHECK: }
// CHECK: Symbol {
// CHECK: Name: secName
// CHECK: Section: secName (5)
// CHECK: AuxSectionDef {
// CHECK: Selection: Any
// CHECK: }
// CHECK: }
// CHECK: Symbol {
// CHECK: Name: Symbol1
// CHECK: Section: secName (5)
// CHECK: }
// CHECK: Symbol {
// CHECK: Name: secName
// CHECK: Section: secName (6)
// CHECK: AuxSectionDef {
// CHECK: Selection: NoDuplicates
// CHECK: }
// CHECK: }
// CHECK: Symbol {
// CHECK: Name: Symbol2
// CHECK: Section: secName (6)
// CHECK: }
// CHECK: Symbol {
// CHECK: Name: SecName
// CHECK: Section: SecName (7)
// CHECK: AuxSectionDef {
// CHECK: Selection: SameSize
// CHECK: }
// CHECK: }
// CHECK: Symbol {
// CHECK: Name: Symbol3
// CHECK: Section: SecName (7)
// CHECK: }
// CHECK: Symbol {
// CHECK: Name: SecName
// CHECK: Section: SecName (8)
// CHECK: AuxSymbolCount: 1
// CHECK: AuxSectionDef {
// CHECK: Selection: ExactMatch
// CHECK: }
// CHECK: }
// CHECK: Symbol {
// CHECK: Name: Symbol4
// CHECK: Section: SecName (8)
// CHECK: }
// CHECK: Symbol {
// CHECK: Name: SecName
// CHECK: Section: SecName (9)
// CHECK: AuxSectionDef {
// CHECK: Selection: Associative
// CHECK: AssocSection: assocSec (4)
// CHECK: }
// CHECK: }
// CHECK: Symbol {
// CHECK: Name: SecName
// CHECK: Section: SecName (10)
// CHECK: AuxSectionDef {
// CHECK: Selection: Largest
// CHECK: }
// CHECK: }
// CHECK: Symbol {
// CHECK: Name: Symbol6
// CHECK: Section: SecName (10)
// CHECK: }
// CHECK: Symbol {
// CHECK: Name: SecName
// CHECK: Section: SecName (11)
// CHECK: AuxSectionDef {
// CHECK: Selection: Newest (0x7)
// CHECK: }
// CHECK: }
// CHECK: Symbol {
// CHECK: Name: Symbol7
// CHECK: Section: SecName (11)
// CHECK: }
// CHECK: Symbol {
// CHECK: Name: Symbol5
// CHECK: Section: SecName (9)
// CHECK: }
// CHECK: ]