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
44
45
46
47
|
; RUN: opt < %s -deadargelim -S | FileCheck %s
%Ty = type <{ i32, i32 }>
; Check if the pass doesn't modify anything that doesn't need changing. We feed
; an unused argument to each function to lure it into changing _something_ about
; the function and then changing too much.
; This checks if the return value attributes are not removed
; CHECK: define internal zeroext i32 @test1() #0
define internal zeroext i32 @test1(i32 %DEADARG1) nounwind {
ret i32 1
}
; This checks if the struct doesn't get non-packed
; CHECK-LABEL: define internal <{ i32, i32 }> @test2(
define internal <{ i32, i32 }> @test2(i32 %DEADARG1) {
ret <{ i32, i32 }> <{ i32 1, i32 2 }>
}
; We use this external function to make sure the return values don't become dead
declare void @user(i32, <{ i32, i32 }>)
define void @caller() {
%B = call i32 @test1(i32 1)
%C = call <{ i32, i32 }> @test2(i32 2)
call void @user(i32 %B, <{ i32, i32 }> %C)
ret void
}
; We can't remove 'this' here, as that would put argmem in ecx instead of
; memory.
define internal x86_thiscallcc i32 @unused_this(i32* %this, i32* inalloca %argmem) {
%v = load i32* %argmem
ret i32 %v
}
; CHECK-LABEL: define internal x86_thiscallcc i32 @unused_this(i32* %this, i32* inalloca %argmem)
define i32 @caller2() {
%t = alloca i32
%m = alloca inalloca i32
store i32 42, i32* %m
%v = call x86_thiscallcc i32 @unused_this(i32* %t, i32* inalloca %m)
ret i32 %v
}
; CHECK: attributes #0 = { nounwind }
|
