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llvm-mirror/test/Transforms/GlobalOpt/undef-init.ll
Fangrui Song 7cb7bfede4 [IR] Disallow llvm.global_ctors and llvm.global_dtors of the 2-field form in textual format
The 3-field form was introduced by D3499 in 2014 and the legacy 2-field
form was planned to be removed in LLVM 4.0

For the textual format, this patch migrates the existing 2-field form to
use the 3-field form and deletes the compatibility code.
test/Verifier/global-ctors-2.ll checks we have a friendly error message.

For bitcode, lib/IR/AutoUpgrade UpgradeGlobalVariables will upgrade the
2-field form (add i8* null as the third field).

Reviewed By: rnk, dexonsmith

Differential Revision: https://reviews.llvm.org/D61547

llvm-svn: 360742
2019-05-15 02:35:32 +00:00

18 lines
556 B
LLVM

; RUN: opt < %s -globalopt -S | FileCheck %s
; CHECK-NOT: store
@llvm.global_ctors = appending global [1 x { i32, void ()*, i8* }] [ { i32, void ()*, i8* } { i32 65535, void ()* @_GLOBAL__I__Z3foov, i8* null } ] ; <[1 x { i32, void ()*, i8* }]*> [#uses=0]
@X.0 = internal global i32 undef ; <i32*> [#uses=2]
define i32 @_Z3foov() {
entry:
%tmp.1 = load i32, i32* @X.0 ; <i32> [#uses=1]
ret i32 %tmp.1
}
define internal void @_GLOBAL__I__Z3foov() {
entry:
store i32 1, i32* @X.0
ret void
}