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38f68c5a2e
Representing dllexport/dllimport as distinct linkage types prevents using
these attributes on templates and inline functions.
Instead of introducing further mixed linkage types to include linkonce and
weak ODR, the old import/export linkage types are replaced with a new
separate visibility-like specifier:
define available_externally dllimport void @f() {}
@Var = dllexport global i32 1, align 4
Linkage for dllexported globals and functions is now equal to their linkage
without dllexport. Imported globals and functions must be either
declarations with external linkage, or definitions with
AvailableExternallyLinkage.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199218 91177308-0d34-0410-b5e6-96231b3b80d8
49 lines
1.2 KiB
LLVM
49 lines
1.2 KiB
LLVM
; RUN: llc -mtriple x86_64-pc-win32 < %s | FileCheck %s
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; RUN: llc -mtriple x86_64-pc-mingw32 < %s | FileCheck %s
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;
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; RUN: llc -mtriple x86_64-pc-mingw32 -O0 < %s | FileCheck %s -check-prefix=FAST
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; PR6275
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;
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; RUN: opt -mtriple x86_64-pc-win32 -std-compile-opts -S < %s | FileCheck %s -check-prefix=OPT
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@Var1 = external dllimport global i32
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@Var2 = available_externally dllimport unnamed_addr constant i32 1
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declare dllimport void @fun()
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define available_externally dllimport void @inline1() {
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ret void
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}
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define available_externally dllimport void @inline2() {
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ret void
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}
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declare void @dummy(...)
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define void @use() nounwind {
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; CHECK: callq *__imp_fun(%rip)
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; FAST: movq __imp_fun(%rip), [[R:%[a-z]{3}]]
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; FAST-NEXT: callq *[[R]]
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call void @fun()
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; CHECK: callq *__imp_inline1(%rip)
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; CHECK: callq *__imp_inline2(%rip)
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call void @inline1()
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call void @inline2()
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; available_externally uses go away
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; OPT-NOT: call void @inline1()
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; OPT-NOT: call void @inline2()
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; OPT-NOT: load i32* @Var2
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; OPT: call void (...)* @dummy(i32 %1, i32 1)
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; CHECK-DAG: movq __imp_Var1(%rip), [[R1:%[a-z]{3}]]
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; CHECK-DAG: movq __imp_Var2(%rip), [[R2:%[a-z]{3}]]
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%1 = load i32* @Var1
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%2 = load i32* @Var2
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call void(...)* @dummy(i32 %1, i32 %2)
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ret void
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}
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