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31b080d57f
link.exe: Fuzz testing has shown that COMMON symbols with size > 32 will always have an alignment of at least 32 and all symbols with size < 32 will have an alignment of at least the largest power of 2 less than the size of the symbol. binutils: The BFD linker essentially work like the link.exe behavior but with alignment 4 instead of 32. The BFD linker also supports an extension to COFF which adds an -aligncomm argument to the .drectve section which permits specifying a precise alignment for a variable but MC currently doesn't support editing .drectve in this way. With all of this in mind, we decide to play a little trick: we can ensure that the alignment will be respected by bumping the size of the global to it's alignment. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218201 91177308-0d34-0410-b5e6-96231b3b80d8
38 lines
1.1 KiB
ArmAsm
38 lines
1.1 KiB
ArmAsm
// RUN: llvm-mc -filetype=obj -triple i686-pc-win32 %s | llvm-readobj -t | FileCheck %s
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.lcomm _a,4,4
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.comm _b, 4, 2
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// _c has size 1 but align 32, the value field is the max of size and align.
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.comm _c, 1, 5
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// CHECK: Symbol {
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// CHECK: Name: _a
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// CHECK-NEXT: Value:
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// CHECK-NEXT: Section: .bss
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// CHECK-NEXT: BaseType: Null
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// CHECK-NEXT: ComplexType: Null
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// CHECK-NEXT: StorageClass: Static
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// CHECK-NEXT: AuxSymbolCount: 0
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// CHECK-NEXT: }
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// CHECK: Symbol {
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// CHECK: Name: _b
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// CHECK-NEXT: Value: 4
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// CHECK-NEXT: Section: IMAGE_SYM_UNDEFINED (0)
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// CHECK-NEXT: BaseType: Null
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// CHECK-NEXT: ComplexType: Null
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// CHECK-NEXT: StorageClass: External
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// CHECK-NEXT: AuxSymbolCount: 0
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// CHECK-NEXT: }
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// CHECK: Symbol {
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// CHECK: Name: _c
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// CHECK-NEXT: Value: 32
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// CHECK-NEXT: Section: IMAGE_SYM_UNDEFINED (0)
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// CHECK-NEXT: BaseType: Null
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// CHECK-NEXT: ComplexType: Null
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// CHECK-NEXT: StorageClass: External
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// CHECK-NEXT: AuxSymbolCount: 0
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// CHECK-NEXT: }
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