llvm-6502/test/MC/COFF/alias.s
Saleem Abdulrasool a51acc7631 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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210373 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-06 21:40:16 +00:00

108 lines
3.5 KiB
ArmAsm

// RUN: llvm-mc -filetype=obj -triple i686-pc-win32 %s -o - \
// RUN: | llvm-readobj -t -r | FileCheck %s
local1:
external_aliased_to_local = local1
.globl global_aliased_to_external
global_aliased_to_external = external1
.globl global_aliased_to_local
local2:
global_aliased_to_local = local2
.weak weak_aliased_to_external
weak_aliased_to_external = external2
// Generate relocs against the above aliases.
.long external_aliased_to_local
.long global_aliased_to_external
.long global_aliased_to_local
.long weak_aliased_to_external
// CHECK: Relocations [
// CHECK: 0x0 IMAGE_REL_I386_DIR32 local1
// CHECK: 0x4 IMAGE_REL_I386_DIR32 external1
// CHECK: 0x8 IMAGE_REL_I386_DIR32 local2
// CHECK: 0xC IMAGE_REL_I386_DIR32 external2
// CHECK: ]
// CHECK: Symbols [
// CHECK-NEXT: Symbol {
// CHECK-NEXT: Name: .text
// CHECK-NEXT: Value: 0
// CHECK-NEXT: Section: .text (1)
// CHECK-NEXT: BaseType: Null (0x0)
// CHECK-NEXT: ComplexType: Null (0x0)
// CHECK-NEXT: StorageClass: Static (0x3)
// CHECK-NEXT: AuxSymbolCount: 1
// CHECK: }
// CHECK: Symbol {
// CHECK: Name: local1
// CHECK-NEXT: Value: 0
// CHECK-NEXT: Section: .text (1)
// CHECK-NEXT: BaseType: Null (0x0)
// CHECK-NEXT: ComplexType: Null (0x0)
// CHECK-NEXT: StorageClass: Static (0x3)
// CHECK-NEXT: AuxSymbolCount: 0
// CHECK-NEXT: }
// CHECK-NEXT: Symbol {
// CHECK-NEXT: Name: global_aliased_to_external
// CHECK-NEXT: Value: 0
// CHECK-NEXT: Section: (0)
// CHECK-NEXT: BaseType: Null (0x0)
// CHECK-NEXT: ComplexType: Null (0x0)
// CHECK-NEXT: StorageClass: External (0x2)
// CHECK-NEXT: AuxSymbolCount: 0
// CHECK-NEXT: }
// CHECK-NEXT: Symbol {
// CHECK-NEXT: Name: external1
// CHECK-NEXT: Value: 0
// CHECK-NEXT: Section: (0)
// CHECK-NEXT: BaseType: Null (0x0)
// CHECK-NEXT: ComplexType: Null (0x0)
// CHECK-NEXT: StorageClass: External (0x2)
// CHECK-NEXT: AuxSymbolCount: 0
// CHECK-NEXT: }
// CHECK-NEXT: Symbol {
// CHECK-NEXT: Name: global_aliased_to_local
// CHECK-NEXT: Value: 0
// CHECK-NEXT: Section: .text (1)
// CHECK-NEXT: BaseType: Null (0x0)
// CHECK-NEXT: ComplexType: Null (0x0)
// CHECK-NEXT: StorageClass: External (0x2)
// CHECK-NEXT: AuxSymbolCount: 0
// CHECK-NEXT: }
// CHECK-NEXT: Symbol {
// CHECK-NEXT: Name: local2
// CHECK-NEXT: Value: 0
// CHECK-NEXT: Section: .text (1)
// CHECK-NEXT: BaseType: Null (0x0)
// CHECK-NEXT: ComplexType: Null (0x0)
// CHECK-NEXT: StorageClass: Static (0x3)
// CHECK-NEXT: AuxSymbolCount: 0
// CHECK-NEXT: }
// CHECK-NEXT: Symbol {
// CHECK-NEXT: Name: weak_aliased_to_external
// CHECK-NEXT: Value: 0
// CHECK-NEXT: Section: (0)
// CHECK-NEXT: BaseType: Null (0x0)
// CHECK-NEXT: ComplexType: Null (0x0)
// CHECK-NEXT: StorageClass: WeakExternal (0x69)
// CHECK-NEXT: AuxSymbolCount: 1
// CHECK-NEXT: AuxWeakExternal {
// CHECK-NEXT: Linked: external2 (13)
// CHECK-NEXT: Search: Library (0x2)
// CHECK-NEXT: Unused: (00 00 00 00 00 00 00 00 00 00)
// CHECK-NEXT: }
// CHECK-NEXT: }
// CHECK-NEXT: Symbol {
// CHECK-NEXT: Name: external2
// CHECK-NEXT: Value: 0
// CHECK-NEXT: Section: (0)
// CHECK-NEXT: BaseType: Null (0x0)
// CHECK-NEXT: ComplexType: Null (0x0)
// CHECK-NEXT: StorageClass: External (0x2)
// CHECK-NEXT: AuxSymbolCount: 0
// CHECK-NEXT: }
// CHECK-NEXT: ]