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c8a1169c93
This new IR facility allows us to represent the object-file semantic of a COMDAT group. COMDATs allow us to tie together sections and make the inclusion of one dependent on another. This is required to implement features like MS ABI VFTables and optimizing away certain kinds of initialization in C++. This functionality is only representable in COFF and ELF, Mach-O has no similar mechanism. Differential Revision: http://reviews.llvm.org/D4178 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211920 91177308-0d34-0410-b5e6-96231b3b80d8
93 lines
2.3 KiB
LLVM
93 lines
2.3 KiB
LLVM
; RUN: llc -mtriple i386-pc-win32 < %s | FileCheck %s
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$f1 = comdat any
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@v1 = global i32 0, comdat $f1
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define void @f1() comdat $f1 {
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ret void
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}
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$f2 = comdat exactmatch
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@v2 = global i32 0, comdat $f2
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define void @f2() comdat $f2 {
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ret void
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}
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$f3 = comdat largest
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@v3 = global i32 0, comdat $f3
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define void @f3() comdat $f3 {
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ret void
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}
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$f4 = comdat noduplicates
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@v4 = global i32 0, comdat $f4
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define void @f4() comdat $f4 {
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ret void
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}
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$f5 = comdat samesize
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@v5 = global i32 0, comdat $f5
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define void @f5() comdat $f5 {
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ret void
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}
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$f6 = comdat samesize
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@v6 = global i32 0, comdat $f6
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@f6 = global i32 0, comdat $f6
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$"\01@f7@0" = comdat any
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define x86_fastcallcc void @"\01@v7@0"() comdat $"\01@f7@0" {
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ret void
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}
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define x86_fastcallcc void @"\01@f7@0"() comdat $"\01@f7@0" {
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ret void
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}
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$f8 = comdat any
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define x86_fastcallcc void @v8() comdat $f8 {
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ret void
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}
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define x86_fastcallcc void @f8() comdat $f8 {
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ret void
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}
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$vftable = comdat largest
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@some_name = private unnamed_addr constant [2 x i8*] zeroinitializer, comdat $vftable
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@vftable = alias getelementptr([2 x i8*]* @some_name, i32 0, i32 1)
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; CHECK: .section .text,"xr",discard,_f1
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; CHECK: .globl _f1
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; CHECK: .section .text,"xr",same_contents,_f2
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; CHECK: .globl _f2
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; CHECK: .section .text,"xr",largest,_f3
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; CHECK: .globl _f3
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; CHECK: .section .text,"xr",one_only,_f4
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; CHECK: .globl _f4
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; CHECK: .section .text,"xr",same_size,_f5
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; CHECK: .globl _f5
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; CHECK: .section .text,"xr",associative,@f7@0
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; CHECK: .globl @v7@0
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; CHECK: .section .text,"xr",discard,@f7@0
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; CHECK: .globl @f7@0
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; CHECK: .section .text,"xr",associative,@f8@0
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; CHECK: .globl @v8@0
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; CHECK: .section .text,"xr",discard,@f8@0
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; CHECK: .globl @f8@0
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; CHECK: .section .bss,"bw",associative,_f1
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; CHECK: .globl _v1
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; CHECK: .section .bss,"bw",associative,_f2
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; CHECK: .globl _v2
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; CHECK: .section .bss,"bw",associative,_f3
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; CHECK: .globl _v3
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; CHECK: .section .bss,"bw",associative,_f4
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; CHECK: .globl _v4
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; CHECK: .section .bss,"bw",associative,_f5
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; CHECK: .globl _v5
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; CHECK: .section .bss,"bw",associative,_f6
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; CHECK: .globl _v6
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; CHECK: .section .bss,"bw",same_size,_f6
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; CHECK: .globl _f6
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; CHECK: .section .rdata,"rd",largest,_vftable
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; CHECK: .globl _vftable
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; CHECK: _vftable = L_some_name+4
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