mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2025-01-31 20:51:52 +01:00
839d814b88
MC already knows how to emulate the .weak directive (with its ELF semantics; i.e., an undefined weak symbol resolves to 0, and a defined weak symbol has lower link precedence than a strong symbol of the same name) using COFF weak externals. Plumb this through the ASM printer too, so that definitions marked with __attribute__((weak)) at the language level (which gets translated to weak linkage at the IR level) have the corresponding .weak directive emitted. Note that declarations marked with __attribute__((weak)) at the language level (which translates to extern_weak at the IR level) already have .weak directives emitted. Weak*/linkonce* symbols without an associated comdat (in particular, ones generated with __attribute__((weak)) in C/C++) were earlier emitted as normal unique globals, as the comdat is required to provide the linkonce semantics. This change makes sure they are emitted as .weak instead, allowing other symbols to override them. Rename the existing coff-weak.ll test to coff-linkonce.ll. I'm not quite sure what that test covers, since the behavior being tested in it (the emission of a one_only section) is just a result of passing -function-sections to llc; the linkonce_odr makes no difference. Add a new coff-weak.ll which tests the new directive emission. Based on an previous patch by Shoaib Meenai. Differential Revision: https://reviews.llvm.org/D44543
137 lines
3.7 KiB
LLVM
137 lines
3.7 KiB
LLVM
; RUN: llc -mtriple x86_64-pc-win32 < %s | FileCheck -check-prefix=CHECK -check-prefix=WIN32 %s
|
|
; RUN: llc -mtriple x86_64-pc-mingw32 < %s | FileCheck -check-prefix=CHECK -check-prefix=MINGW %s
|
|
; RUN: llc -mtriple x86_64-pc-win32 < %s | FileCheck -check-prefix=NOTEXPORTED %s
|
|
; RUN: llc -mtriple x86_64-pc-mingw32 < %s | FileCheck -check-prefix=NOTEXPORTED %s
|
|
|
|
; CHECK: .text
|
|
|
|
define void @notExported() {
|
|
ret void
|
|
}
|
|
|
|
; CHECK: .globl f1
|
|
define dllexport void @f1() {
|
|
ret void
|
|
}
|
|
|
|
; CHECK: .globl f2
|
|
define dllexport void @f2() unnamed_addr {
|
|
ret void
|
|
}
|
|
|
|
; CHECK: .globl lnk1
|
|
$lnk1 = comdat any
|
|
|
|
define linkonce_odr dllexport void @lnk1() comdat {
|
|
ret void
|
|
}
|
|
|
|
; CHECK: .globl lnk2
|
|
$lnk2 = comdat any
|
|
|
|
define linkonce_odr dllexport void @lnk2() alwaysinline comdat {
|
|
ret void
|
|
}
|
|
|
|
; CHECK: .weak weak1
|
|
define weak_odr dllexport void @weak1() {
|
|
ret void
|
|
}
|
|
|
|
|
|
; CHECK: .data
|
|
; CHECK: .globl Var1
|
|
@Var1 = dllexport global i32 1, align 4
|
|
|
|
; CHECK: .rdata,"dr"
|
|
; CHECK: .globl Var2
|
|
@Var2 = dllexport unnamed_addr constant i32 1
|
|
|
|
; CHECK: .comm Var3
|
|
@Var3 = common dllexport global i32 0, align 4
|
|
|
|
; CHECK: .weak WeakVar1
|
|
@WeakVar1 = weak_odr dllexport global i32 1, align 4
|
|
|
|
; CHECK: .weak WeakVar2
|
|
@WeakVar2 = weak_odr dllexport unnamed_addr constant i32 1
|
|
|
|
; CHECK: .bss
|
|
; CHECK: .weak WeakVar3
|
|
@WeakVar3 = weak_odr dllexport global i32 0, align 4
|
|
|
|
|
|
; CHECK: .globl alias
|
|
; CHECK: .set alias, notExported
|
|
@alias = dllexport alias void(), void()* @notExported
|
|
|
|
; CHECK: .globl aliasNotExported
|
|
; CHECK: .set aliasNotExported, f1
|
|
@aliasNotExported = alias void(), void()* @f1
|
|
|
|
; CHECK: .globl alias2
|
|
; CHECK: .set alias2, f1
|
|
@alias2 = dllexport alias void(), void()* @f1
|
|
|
|
; CHECK: .globl alias3
|
|
; CHECK: .set alias3, notExported
|
|
@alias3 = dllexport alias void(), void()* @notExported
|
|
|
|
; CHECK: .weak weak_alias
|
|
; CHECK: .set weak_alias, f1
|
|
@weak_alias = weak_odr dllexport alias void(), void()* @f1
|
|
|
|
@blob = global [6 x i8] c"\B8*\00\00\00\C3", section ".text", align 16
|
|
@blob_alias = dllexport alias i32 (), bitcast ([6 x i8]* @blob to i32 ()*)
|
|
|
|
@exportedButNotDefinedVariable = external dllexport global i32
|
|
declare dllexport void @exportedButNotDefinedFunction()
|
|
define void @foo() {
|
|
entry:
|
|
store i32 4, i32* @exportedButNotDefinedVariable, align 4
|
|
call void @exportedButNotDefinedFunction()
|
|
ret void
|
|
}
|
|
|
|
; Verify items that should not be exported do not appear in the export table.
|
|
; We use a separate check prefix to avoid confusion between -NOT and -SAME.
|
|
; NOTEXPORTED: .section .drectve
|
|
; NOTEXPORTED-NOT: notExported
|
|
; NOTEXPORTED-NOT: aliasNotExported
|
|
; NOTEXPORTED-NOT: exportedButNotDefinedVariable
|
|
; NOTEXPORTED-NOT: exportedButNotDefinedFunction
|
|
|
|
; CHECK: .section .drectve
|
|
; WIN32: .ascii " /EXPORT:f1"
|
|
; WIN32: .ascii " /EXPORT:f2"
|
|
; WIN32: .ascii " /EXPORT:lnk1"
|
|
; WIN32: .ascii " /EXPORT:lnk2"
|
|
; WIN32: .ascii " /EXPORT:weak1"
|
|
; WIN32: .ascii " /EXPORT:Var1,DATA"
|
|
; WIN32: .ascii " /EXPORT:Var2,DATA"
|
|
; WIN32: .ascii " /EXPORT:Var3,DATA"
|
|
; WIN32: .ascii " /EXPORT:WeakVar1,DATA"
|
|
; WIN32: .ascii " /EXPORT:WeakVar2,DATA"
|
|
; WIN32: .ascii " /EXPORT:WeakVar3,DATA"
|
|
; WIN32: .ascii " /EXPORT:alias"
|
|
; WIN32: .ascii " /EXPORT:alias2"
|
|
; WIN32: .ascii " /EXPORT:alias3"
|
|
; WIN32: .ascii " /EXPORT:weak_alias"
|
|
; WIN32: .ascii " /EXPORT:blob_alias"
|
|
; MINGW: .ascii " -export:f1"
|
|
; MINGW: .ascii " -export:f2"
|
|
; MINGW: .ascii " -export:lnk1"
|
|
; MINGW: .ascii " -export:lnk2"
|
|
; MINGW: .ascii " -export:weak1"
|
|
; MINGW: .ascii " -export:Var1,data"
|
|
; MINGW: .ascii " -export:Var2,data"
|
|
; MINGW: .ascii " -export:Var3,data"
|
|
; MINGW: .ascii " -export:WeakVar1,data"
|
|
; MINGW: .ascii " -export:WeakVar2,data"
|
|
; MINGW: .ascii " -export:WeakVar3,data"
|
|
; MINGW: .ascii " -export:alias"
|
|
; MINGW: .ascii " -export:alias2"
|
|
; MINGW: .ascii " -export:alias3"
|
|
; MINGW: .ascii " -export:weak_alias"
|
|
; MINGW: .ascii " -export:blob_alias"
|