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
52
|
; RUN: llc -verify-machineinstrs < %s -mtriple=ppc32-- | not grep "extsh\|rlwinm"
declare signext i16 @foo()
define i32 @test1(i16 signext %X) {
%Y = sext i16 %X to i32 ;; dead
ret i32 %Y
}
define i32 @test2(i16 zeroext %X) {
%Y = sext i16 %X to i32
%Z = and i32 %Y, 65535 ;; dead
ret i32 %Z
}
define void @test3() {
%tmp.0 = call signext i16 @foo() ;; no extsh!
%tmp.1 = icmp slt i16 %tmp.0, 1234
br i1 %tmp.1, label %then, label %UnifiedReturnBlock
then:
call i32 @test1(i16 signext 0)
ret void
UnifiedReturnBlock:
ret void
}
define i32 @test4(i16* %P) {
%tmp.1 = load i16, i16* %P
%tmp.2 = zext i16 %tmp.1 to i32
%tmp.3 = and i32 %tmp.2, 255
ret i32 %tmp.3
}
define i32 @test5(i16* %P) {
%tmp.1 = load i16, i16* %P
%tmp.2 = bitcast i16 %tmp.1 to i16
%tmp.3 = zext i16 %tmp.2 to i32
%tmp.4 = and i32 %tmp.3, 255
ret i32 %tmp.4
}
define i32 @test6(i32* %P) {
%tmp.1 = load i32, i32* %P
%tmp.2 = and i32 %tmp.1, 255
ret i32 %tmp.2
}
define zeroext i16 @test7(float %a) {
%tmp.1 = fptoui float %a to i16
ret i16 %tmp.1
}
|
