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
53
|
; RUN: llc < %s -march=x86 | grep {movzbl %\[abcd\]h,} | count 7
; Use h-register extract and zero-extend.
define double @foo8(double* nocapture inreg %p, i32 inreg %x) nounwind readonly {
%t0 = lshr i32 %x, 8
%t1 = and i32 %t0, 255
%t2 = getelementptr double* %p, i32 %t1
%t3 = load double* %t2, align 8
ret double %t3
}
define float @foo4(float* nocapture inreg %p, i32 inreg %x) nounwind readonly {
%t0 = lshr i32 %x, 8
%t1 = and i32 %t0, 255
%t2 = getelementptr float* %p, i32 %t1
%t3 = load float* %t2, align 8
ret float %t3
}
define i16 @foo2(i16* nocapture inreg %p, i32 inreg %x) nounwind readonly {
%t0 = lshr i32 %x, 8
%t1 = and i32 %t0, 255
%t2 = getelementptr i16* %p, i32 %t1
%t3 = load i16* %t2, align 8
ret i16 %t3
}
define i8 @foo1(i8* nocapture inreg %p, i32 inreg %x) nounwind readonly {
%t0 = lshr i32 %x, 8
%t1 = and i32 %t0, 255
%t2 = getelementptr i8* %p, i32 %t1
%t3 = load i8* %t2, align 8
ret i8 %t3
}
define i8 @bar8(i8* nocapture inreg %p, i32 inreg %x) nounwind readonly {
%t0 = lshr i32 %x, 5
%t1 = and i32 %t0, 2040
%t2 = getelementptr i8* %p, i32 %t1
%t3 = load i8* %t2, align 8
ret i8 %t3
}
define i8 @bar4(i8* nocapture inreg %p, i32 inreg %x) nounwind readonly {
%t0 = lshr i32 %x, 6
%t1 = and i32 %t0, 1020
%t2 = getelementptr i8* %p, i32 %t1
%t3 = load i8* %t2, align 8
ret i8 %t3
}
define i8 @bar2(i8* nocapture inreg %p, i32 inreg %x) nounwind readonly {
%t0 = lshr i32 %x, 7
%t1 = and i32 %t0, 510
%t2 = getelementptr i8* %p, i32 %t1
%t3 = load i8* %t2, align 8
ret i8 %t3
}
|