llvm-6502/test/CodeGen/X86/dllexport.ll
Peter Collingbourne a6367d9136 Teach LTOModule to emit linker flags for dllexported symbols, plus interface cleanup.
This change unifies how LTOModule and the backend obtain linker flags
for globals: via a new TargetLoweringObjectFile member function named
emitLinkerFlagsForGlobal. A new function LTOModule::getLinkerOpts() returns
the list of linker flags as a single concatenated string.

This change affects the C libLTO API: the function lto_module_get_*deplibs now
exposes an empty list, and lto_module_get_*linkeropts exposes a single element
which combines the contents of all observed flags. libLTO should never have
tried to parse the linker flags; it is the linker's job to do so. Because
linkers will need to be able to parse flags in regular object files, it
makes little sense for libLTO to have a redundant mechanism for doing so.

The new API is compatible with the old one. It is valid for a user to specify
multiple linker flags in a single pragma directive like this:

 #pragma comment(linker, "/defaultlib:foo /defaultlib:bar")

The previous implementation would not have exposed
either flag via lto_module_get_*deplibs (as the test in
TargetLoweringObjectFileCOFF::getDepLibFromLinkerOpt was case sensitive)
and would have exposed "/defaultlib:foo /defaultlib:bar" as a single flag via
lto_module_get_*linkeropts. This may have been a bug in the implementation,
but it does give us a chance to fix the interface.

Differential Revision: http://reviews.llvm.org/D10548

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@241010 91177308-0d34-0410-b5e6-96231b3b80d8
2015-06-29 22:04:09 +00:00

130 lines
3.1 KiB
LLVM

; RUN: llc -mtriple i386-pc-win32 < %s \
; RUN: | FileCheck -check-prefix CHECK -check-prefix CHECK-CL %s
; RUN: llc -mtriple i386-pc-mingw32 < %s \
; RUN: | FileCheck -check-prefix CHECK -check-prefix CHECK-GCC %s
; RUN: llc -mtriple i686-pc-cygwin %s -o - \
; RUN: | FileCheck -check-prefix CHECK -check-prefix CHECK-GCC %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
}
declare dllexport void @not_defined()
; CHECK: .globl _stdfun@0
define dllexport x86_stdcallcc void @stdfun() nounwind {
ret void
}
; CHECK: .globl @fastfun@0
define dllexport x86_fastcallcc i32 @fastfun() nounwind {
ret i32 0
}
; CHECK: .globl _thisfun
define dllexport x86_thiscallcc void @thisfun() nounwind {
ret void
}
; CHECK: .globl _lnk1
define linkonce_odr dllexport void @lnk1() {
ret void
}
; CHECK: .globl _lnk2
define linkonce_odr dllexport void @lnk2() alwaysinline {
ret void
}
; CHECK: .globl _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: .globl _WeakVar1
@WeakVar1 = weak_odr dllexport global i32 1, align 4
; CHECK: .globl _WeakVar2
@WeakVar2 = weak_odr dllexport unnamed_addr constant i32 1
; CHECK: .globl _alias
; CHECK: _alias = _notExported
@alias = dllexport alias void()* @notExported
; CHECK: .globl _alias2
; CHECK: _alias2 = _f1
@alias2 = dllexport alias void()* @f1
; CHECK: .globl _alias3
; CHECK: _alias3 = _notExported
@alias3 = dllexport alias void()* @notExported
; CHECK: .weak _weak_alias
; CHECK: _weak_alias = _f1
@weak_alias = weak_odr dllexport alias void()* @f1
; CHECK: .section .drectve
; CHECK-CL-NOT: not_exported
; CHECK-CL: /EXPORT:_f1
; CHECK-CL-SAME: /EXPORT:_f2
; CHECK-CL-SAME: /EXPORT:_stdfun@0
; CHECK-CL-SAME: /EXPORT:@fastfun@0
; CHECK-CL-SAME: /EXPORT:_thisfun
; CHECK-CL-SAME: /EXPORT:_lnk1
; CHECK-CL-SAME: /EXPORT:_lnk2
; CHECK-CL-SAME: /EXPORT:_weak1
; CHECK-CL-SAME: /EXPORT:_Var1,DATA
; CHECK-CL-SAME: /EXPORT:_Var2,DATA
; CHECK-CL-SAME: /EXPORT:_Var3,DATA
; CHECK-CL-SAME: /EXPORT:_WeakVar1,DATA
; CHECK-CL-SAME: /EXPORT:_WeakVar2,DATA
; CHECK-CL-SAME: /EXPORT:_alias
; CHECK-CL-SAME: /EXPORT:_alias2
; CHECK-CL-SAME: /EXPORT:_alias3
; CHECK-CL-SAME: /EXPORT:_weak_alias"
; CHECK-CL-NOT: not_exported
; CHECK-GCC-NOT: not_exported
; CHECK-GCC: -export:f1
; CHECK-GCC-SAME: -export:f2
; CHECK-GCC-SAME: -export:stdfun@0
; CHECK-GCC-SAME: -export:@fastfun@0
; CHECK-GCC-SAME: -export:thisfun
; CHECK-GCC-SAME: -export:lnk1
; CHECK-GCC-SAME: -export:lnk2
; CHECK-GCC-SAME: -export:weak1
; CHECK-GCC-SAME: -export:Var1,data
; CHECK-GCC-SAME: -export:Var2,data
; CHECK-GCC-SAME: -export:Var3,data
; CHECK-GCC-SAME: -export:WeakVar1,data
; CHECK-GCC-SAME: -export:WeakVar2,data
; CHECK-GCC-SAME: -export:alias
; CHECK-GCC-SAME: -export:alias2
; CHECK-GCC-SAME: -export:alias3
; CHECK-GCC-SAME: -export:weak_alias"
; CHECK-GCC-NOT: not_exported