blob: 091f148a248331f56e06aa9ac86fcdaf06c017e9 (
plain)
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
48
49
50
51
|
; This tests for various complex cast elimination cases instcombine should
; handle.
; RUN: llvm-as < %s | opt -instcombine | llvm-dis | notcast
define i1 @test1(i32 %X) {
%A = bitcast i32 %X to i32 ; <i32> [#uses=1]
; Convert to setne int %X, 12
%c = icmp ne i32 %A, 12 ; <i1> [#uses=1]
ret i1 %c
}
define i1 @test2(i32 %X, i32 %Y) {
%A = bitcast i32 %X to i32 ; <i32> [#uses=1]
%B = bitcast i32 %Y to i32 ; <i32> [#uses=1]
; Convert to setne int %X, %Y
%c = icmp ne i32 %A, %B ; <i1> [#uses=1]
ret i1 %c
}
define i32 @test4(i32 %A) {
%B = bitcast i32 %A to i32 ; <i32> [#uses=1]
%C = shl i32 %B, 2 ; <i32> [#uses=1]
%D = bitcast i32 %C to i32 ; <i32> [#uses=1]
ret i32 %D
}
define i16 @test5(i16 %A) {
%B = sext i16 %A to i32 ; <i32> [#uses=1]
%C = and i32 %B, 15 ; <i32> [#uses=1]
%D = trunc i32 %C to i16 ; <i16> [#uses=1]
ret i16 %D
}
define i1 @test6(i1 %A) {
%B = zext i1 %A to i32 ; <i32> [#uses=1]
%C = icmp ne i32 %B, 0 ; <i1> [#uses=1]
ret i1 %C
}
define i1 @test6a(i1 %A) {
%B = zext i1 %A to i32 ; <i32> [#uses=1]
%C = icmp ne i32 %B, -1 ; <i1> [#uses=1]
ret i1 %C
}
define i1 @test7(i8* %A) {
%B = bitcast i8* %A to i32* ; <i32*> [#uses=1]
%C = icmp eq i32* %B, null ; <i1> [#uses=1]
ret i1 %C
}
|
