llvm-6502/test/Transforms/GlobalOpt/preserve-comdats.ll
Rafael Espindola f907a26bc2 Change the .ll syntax for comdats and add a syntactic sugar.
In order to make comdats always explicit in the IR, we decided to make
the syntax a bit more compact for the case of a GlobalObject in a
comdat with the same name.

Just dropping the $name causes problems for

@foo = globabl i32 0, comdat
$bar = comdat ...

and

declare void @foo() comdat
$bar = comdat ...

So the syntax is changed to

@g1 = globabl i32 0, comdat($c1)
@g2 = globabl i32 0, comdat

and

declare void @foo() comdat($c1)
declare void @foo() comdat

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@225302 91177308-0d34-0410-b5e6-96231b3b80d8
2015-01-06 22:55:16 +00:00

38 lines
1.1 KiB
LLVM

; RUN: opt -globalopt -S < %s | FileCheck %s
$comdat_global = comdat any
@comdat_global = weak_odr global i8 0, comdat($comdat_global)
@simple_global = internal global i8 0
; CHECK: @comdat_global = weak_odr global i8 0, comdat{{$}}
; CHECK: @simple_global = internal global i8 42
@llvm.global_ctors = appending global [2 x { i32, void ()*, i8* }] [
{ i32, void ()*, i8* } { i32 65535, void ()* @init_comdat_global, i8* @comdat_global },
{ i32, void ()*, i8* } { i32 65535, void ()* @init_simple_global, i8* null }
]
; CHECK: @llvm.global_ctors = appending global [1 x { i32, void ()*, i8* }]
; CHECK: [{ i32, void ()*, i8* } { i32 65535, void ()* @init_comdat_global, i8* @comdat_global }]
define void @init_comdat_global() {
store i8 42, i8* @comdat_global
ret void
}
; CHECK: define void @init_comdat_global()
define internal void @init_simple_global() comdat($comdat_global) {
store i8 42, i8* @simple_global
ret void
}
; CHECK-NOT: @init_simple_global()
define i8* @use_simple() {
ret i8* @simple_global
}
; CHECK: define i8* @use_simple()
define i8* @use_comdat() {
ret i8* @comdat_global
}
; CHECK: define i8* @use_comdat()