1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
|
; RUN: opt < %s -passes=deadargelim -S | FileCheck %s
@g0 = global i8 0, align 8
; CHECK-NOT: DEAD
; Dead arg only used by dead retval
define internal i32 @test(i32 %DEADARG) {
ret i32 %DEADARG
}
define i32 @test2(i32 %A) {
%DEAD = call i32 @test( i32 %A ) ; <i32> [#uses=0]
ret i32 123
}
define i32 @test3() {
%X = call i32 @test2( i32 3232 ) ; <i32> [#uses=1]
%Y = add i32 %X, -123 ; <i32> [#uses=1]
ret i32 %Y
}
; The callee function's return type shouldn't be changed if the call result is
; used.
; CHECK-LABEL: define internal i8* @callee4()
define internal i8* @callee4(i8* %a0) {
ret i8* @g0;
}
declare void @llvm.objc.clang.arc.noop.use(...)
; CHECK-LABEL: define i8* @test4(
; CHECK: tail call i8* @callee4() [ "clang.arc.attachedcall"(i8* (i8*)* @llvm.objc.retainAutoreleasedReturnValue) ]
define i8* @test4() {
%call = tail call i8* @callee4(i8* @g0) [ "clang.arc.attachedcall"(i8* (i8*)* @llvm.objc.retainAutoreleasedReturnValue) ]
call void (...) @llvm.objc.clang.arc.noop.use(i8* %call)
ret i8* @g0
}
declare i8* @llvm.objc.retainAutoreleasedReturnValue(i8*)
|
