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llvm-project/llvm/test/Linker/global_ctors.ll

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Simplify test. NFC. llvm-svn: 254419
2015-12-01 23:46:46 +08:00
; RUN: llvm-link -S %s %S/Inputs/old_global_ctors.3.4.bc | FileCheck %s
; RUN: llvm-link -S %S/Inputs/old_global_ctors.3.4.bc %s | FileCheck %s
Add comdat key field to llvm.global_ctors and llvm.global_dtors This allows us to put dynamic initializers for weak data into the same comdat group as the data being initialized. This is necessary for MSVC ABI compatibility. Once we have comdats for guard variables, we can use the combination to help GlobalOpt fire more often for weak data with guarded initialization on other platforms. Reviewers: nlewycky Differential Revision: http://reviews.llvm.org/D3499 llvm-svn: 209015
2014-05-17 04:39:27 +08:00
; old_global_ctors.3.4.bc contains the following LLVM IL, assembled into
; bitcode by llvm-as from 3.4. It uses a two element @llvm.global_ctors array.
; ---
; declare void @a_global_ctor()
; declare void @b_global_ctor()
;
; @llvm.global_ctors = appending global [2 x { i32, void ()* } ] [
; { i32, void ()* } { i32 65535, void ()* @a_global_ctor },
; { i32, void ()* } { i32 65535, void ()* @b_global_ctor }
; ]
; ---
declare void @c_global_ctor()
declare void @d_global_ctor()
@llvm.global_ctors = appending global [2 x { i32, void ()*, i8* } ] [
{ i32, void ()*, i8* } { i32 65535, void ()* @c_global_ctor, i8* null },
{ i32, void ()*, i8* } { i32 65535, void ()* @d_global_ctor, i8* null }
]
; CHECK: @llvm.global_ctors = appending global [4 x { i32, void ()*, i8* }] [
; CHECK-DAG: { i32, void ()*, i8* } { i32 65535, void ()* @a_global_ctor, i8* null }
; CHECK-DAG: { i32, void ()*, i8* } { i32 65535, void ()* @b_global_ctor, i8* null }
; CHECK-DAG: { i32, void ()*, i8* } { i32 65535, void ()* @c_global_ctor, i8* null }
; CHECK-DAG: { i32, void ()*, i8* } { i32 65535, void ()* @d_global_ctor, i8* null }
; CHECK: ]