mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-24 19:52:54 +01:00
52d1596fa2
Instead of a custom implementation of replaceAllUsesWith, we just call
replaceAllUsesWith and recreate llvm.used and llvm.compiler-used.
This change is particularity interesting because it makes llvm see
through what clang is doing with static used functions in extern "C"
contexts. With this change, running clang -O2 in
extern "C" {
__attribute__((used)) static void foo() {}
}
produces
@llvm.used = appending global [1 x i8*] [i8* bitcast (void ()* @foo to
i8*)], section "llvm.metadata"
define internal void @foo() #0 {
entry:
ret void
}
llvm-svn: 183756
48 lines
1.5 KiB
LLVM
48 lines
1.5 KiB
LLVM
; RUN: opt < %s -globalopt -S | FileCheck %s
|
|
|
|
@c = global i8 42
|
|
|
|
@i = internal global i8 42
|
|
; CHECK: @ia = internal global i8 42
|
|
@ia = alias internal i8* @i
|
|
|
|
@llvm.used = appending global [3 x i8*] [i8* bitcast (void ()* @fa to i8*), i8* bitcast (void ()* @f to i8*), i8* @ca], section "llvm.metadata"
|
|
; CHECK-DAG: @llvm.used = appending global [3 x i8*] [i8* bitcast (void ()* @fa to i8*), i8* bitcast (void ()* @f to i8*), i8* @ca], section "llvm.metadata"
|
|
|
|
@llvm.compiler_used = appending global [4 x i8*] [i8* bitcast (void ()* @fa3 to i8*), i8* bitcast (void ()* @fa to i8*), i8* @ia, i8* @i], section "llvm.metadata"
|
|
; CHECK-DAG: @llvm.compiler_used = appending global [2 x i8*] [i8* bitcast (void ()* @fa3 to i8*), i8* @ia], section "llvm.metadata"
|
|
|
|
@sameAsUsed = global [3 x i8*] [i8* bitcast (void ()* @fa to i8*), i8* bitcast (void ()* @f to i8*), i8* @ca]
|
|
; CHECK-DAG: @sameAsUsed = global [3 x i8*] [i8* bitcast (void ()* @f to i8*), i8* bitcast (void ()* @f to i8*), i8* @c]
|
|
|
|
@other = global i32* bitcast (void ()* @fa to i32*)
|
|
; CHECK-DAG: @other = global i32* bitcast (void ()* @f to i32*)
|
|
|
|
@fa = alias internal void ()* @f
|
|
; CHECK: @fa = alias internal void ()* @f
|
|
|
|
@fa2 = alias internal void ()* @f
|
|
; CHECK-NOT: @fa2
|
|
|
|
@fa3 = alias internal void ()* @f
|
|
; CHECK: @fa3
|
|
|
|
@ca = alias internal i8* @c
|
|
; CHECK: @ca = alias internal i8* @c
|
|
|
|
define void @f() {
|
|
ret void
|
|
}
|
|
|
|
define i8* @g() {
|
|
ret i8* bitcast (void ()* @fa to i8*);
|
|
}
|
|
|
|
define i8* @g2() {
|
|
ret i8* bitcast (void ()* @fa2 to i8*);
|
|
}
|
|
|
|
define i8* @h() {
|
|
ret i8* @ca
|
|
}
|