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Summary: Windows does not allow globals to be initialised to point to globals in another DLL. Exported globals may be referenced only from code. Work around this by creating an initialiser that runs in early library initialisation and sets the isa pointer. Reviewers: rjmccall Reviewed By: rjmccall Subscribers: cfe-commits Differential Revision: https://reviews.llvm.org/D50436 llvm-svn: 339317
19 lines
999 B
C
19 lines
999 B
C
// RUN: %clang_cc1 -fblocks -triple i386-pc-windows-msvc %s -emit-llvm -o - -fblocks | FileCheck %s
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int (^x)(void) = ^() { return 21; };
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// Check that the block literal is emitted with a null isa pointer
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// CHECK: @__block_literal_global = internal global { i8**, i32, i32, i8*, %struct.__block_descriptor* } { i8** null,
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// Check that _NSConcreteGlobalBlock has the correct dllimport specifier.
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// CHECK: @_NSConcreteGlobalBlock = external dllimport global i8*
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// Check that we create an initialiser pointer in the correct section (early library initialisation).
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// CHECK: @.block_isa_init_ptr = internal constant void ()* @.block_isa_init, section ".CRT$XCLa"
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// Check that we emit an initialiser for it.
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// CHECK: define internal void @.block_isa_init() {
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// CHECK: store i8** @_NSConcreteGlobalBlock, i8*** getelementptr inbounds ({ i8**, i32, i32, i8*, %struct.__block_descriptor* }, { i8**, i32, i32, i8*, %struct.__block_descriptor* }* @__block_literal_global, i32 0, i32 0), align 4
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