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llvm-project/lld/test/COFF/icf-different-align.test

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COFF: ICF should not merge sectinos if their alignments are not the same. There's actually a room to improve this patch. Instead of not merging sections that have different alignements, we can choose the section that has the largest alignment requirement among all sections that are otherwise considered the same. Then all section alignments are satisfied, so we can merge them. I don't know if that improvement could make any difference for real-world input, so I'll leave it alone. Would be interesting to revisit later. llvm-svn: 248581
2015-09-26 00:50:12 +08:00
# RUN: yaml2obj < %s > %t.obj
# RUN: lld-link /entry:foo /out:%t.exe /subsystem:console /include:bar \
# RUN: /verbose %t.obj > %t.log 2>&1
# RUN: FileCheck %s < %t.log
# CHECK-NOT: Selected foo
# CHECK-NOT: Removed bar
---
header:
Machine: IMAGE_FILE_MACHINE_AMD64
Characteristics: []
sections:
- Name: '.text$mn'
Characteristics: [ IMAGE_SCN_CNT_CODE, IMAGE_SCN_LNK_COMDAT, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ ]
Alignment: 8
SectionData: 4883EC28E8000000004883C428C3
- Name: '.text$mn'
Characteristics: [ IMAGE_SCN_CNT_CODE, IMAGE_SCN_LNK_COMDAT, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ ]
Alignment: 16
SectionData: 4883EC28E8000000004883C428C3
symbols:
- Name: '.text$mn'
Value: 0
SectionNumber: 1
SimpleType: IMAGE_SYM_TYPE_NULL
ComplexType: IMAGE_SYM_DTYPE_NULL
StorageClass: IMAGE_SYM_CLASS_STATIC
SectionDefinition:
Length: 14
NumberOfRelocations: 0
NumberOfLinenumbers: 0
CheckSum: 1682752513
Number: 0
Selection: IMAGE_COMDAT_SELECT_NODUPLICATES
- Name: '.text$mn'
Value: 0
SectionNumber: 2
SimpleType: IMAGE_SYM_TYPE_NULL
ComplexType: IMAGE_SYM_DTYPE_NULL
StorageClass: IMAGE_SYM_CLASS_STATIC
SectionDefinition:
Length: 14
NumberOfRelocations: 0
NumberOfLinenumbers: 0
CheckSum: 1682752513
Number: 0
Selection: IMAGE_COMDAT_SELECT_NODUPLICATES
- Name: foo
Value: 0
SectionNumber: 1
SimpleType: IMAGE_SYM_TYPE_NULL
ComplexType: IMAGE_SYM_DTYPE_FUNCTION
StorageClass: IMAGE_SYM_CLASS_EXTERNAL
- Name: bar
Value: 0
SectionNumber: 2
SimpleType: IMAGE_SYM_TYPE_NULL
ComplexType: IMAGE_SYM_DTYPE_FUNCTION
StorageClass: IMAGE_SYM_CLASS_EXTERNAL
...