mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-10-21 03:53:04 +02:00
f7f8e4fda8
GlobalOpt currently merges stores into the initialisers of internal, externally_initialized globals, but should not do so as the value of the global may change between the initialiser and any code in the module being run. llvm-svn: 250035
38 lines
1.0 KiB
LLVM
38 lines
1.0 KiB
LLVM
; RUN: opt < %s -S -globalopt | FileCheck %s
|
|
|
|
; This global is externally_initialized, which may modify the value between
|
|
; it's static initializer and any code in this module being run, so the only
|
|
; write to it cannot be merged into the static initialiser.
|
|
; CHECK: @a = internal unnamed_addr externally_initialized global i32 undef
|
|
@a = internal externally_initialized global i32 undef
|
|
|
|
; This global is stored to by the external initialization, so cannot be
|
|
; constant-propagated and removed, despite the fact that there are no writes
|
|
; to it.
|
|
; CHECK: @b = internal unnamed_addr externally_initialized global i32 undef
|
|
@b = internal externally_initialized global i32 undef
|
|
|
|
|
|
define void @foo() {
|
|
; CHECK-LABEL: foo
|
|
entry:
|
|
; CHECK: store i32 42, i32* @a
|
|
store i32 42, i32* @a
|
|
ret void
|
|
}
|
|
define i32 @bar() {
|
|
; CHECK-LABEL: bar
|
|
entry:
|
|
; CHECK: %val = load i32, i32* @a
|
|
%val = load i32, i32* @a
|
|
ret i32 %val
|
|
}
|
|
|
|
define i32 @baz() {
|
|
; CHECK-LABEL: baz
|
|
entry:
|
|
; CHECK: %val = load i32, i32* @b
|
|
%val = load i32, i32* @b
|
|
ret i32 %val
|
|
}
|