mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-25 12:12:47 +01:00
fdced47a40
This moves most of GlobalOpt's constructor optimization
code out of GlobalOpt into Transforms/Utils/CDtorUtils.{h,cpp}. The
public interface is a single function OptimizeGlobalCtorsList() that
takes a predicate returning which constructors to remove.
GlobalOpt calls this with a function that statically evaluates all
constructors, just like it did before. This part of the change is
behavior-preserving.
Also add a call to this from GlobalDCE with a filter that removes global
constructors that contain a "ret" instruction and nothing else – this
fixes PR19590.
llvm-svn: 207856
15 lines
568 B
LLVM
15 lines
568 B
LLVM
; RUN: opt -S -globaldce < %s | FileCheck %s
|
|
|
|
; CHECK: @llvm.global_ctors = appending global [1 x { i32, void ()* }] [{ i32, void ()* } { i32 65535, void ()* @_notremovable }]
|
|
; CHECK-NOT: @_GLOBAL__I_a
|
|
|
|
declare void @_notremovable()
|
|
|
|
@llvm.global_ctors = appending global [2 x { i32, void ()* }] [{ i32, void ()* } { i32 65535, void ()* @_GLOBAL__I_a }, { i32, void ()* } { i32 65535, void ()* @_notremovable }]
|
|
|
|
; Function Attrs: nounwind readnone
|
|
define internal void @_GLOBAL__I_a() #1 section "__TEXT,__StaticInit,regular,pure_instructions" {
|
|
entry:
|
|
ret void
|
|
}
|