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
54
55
56
57
|
; RUN: llc -verify-machineinstrs < %s -mtriple=aarch64-none-linux-gnu | FileCheck %s
define i64 @ror_i64(i64 %in) {
; CHECK: ror_i64:
%left = shl i64 %in, 19
%right = lshr i64 %in, 45
%val5 = or i64 %left, %right
; CHECK: extr {{x[0-9]+}}, x0, x0, #45
ret i64 %val5
}
define i32 @ror_i32(i32 %in) {
; CHECK: ror_i32:
%left = shl i32 %in, 9
%right = lshr i32 %in, 23
%val5 = or i32 %left, %right
; CHECK: extr {{w[0-9]+}}, w0, w0, #23
ret i32 %val5
}
define i32 @extr_i32(i32 %lhs, i32 %rhs) {
; CHECK: extr_i32:
%left = shl i32 %lhs, 6
%right = lshr i32 %rhs, 26
%val = or i32 %left, %right
; Order of lhs and rhs matters here. Regalloc would have to be very odd to use
; something other than w0 and w1.
; CHECK: extr {{w[0-9]+}}, w0, w1, #26
ret i32 %val
}
define i64 @extr_i64(i64 %lhs, i64 %rhs) {
; CHECK: extr_i64:
%right = lshr i64 %rhs, 40
%left = shl i64 %lhs, 24
%val = or i64 %right, %left
; Order of lhs and rhs matters here. Regalloc would have to be very odd to use
; something other than w0 and w1.
; CHECK: extr {{x[0-9]+}}, x0, x1, #40
ret i64 %val
}
; Regression test: a bad experimental pattern crept into git which optimised
; this pattern to a single EXTR.
define i32 @extr_regress(i32 %a, i32 %b) {
; CHECK: extr_regress:
%sh1 = shl i32 %a, 14
%sh2 = lshr i32 %b, 14
%val = or i32 %sh2, %sh1
; CHECK-NOT: extr {{w[0-9]+}}, {{w[0-9]+}}, {{w[0-9]+}}, #{{[0-9]+}}
ret i32 %val
; CHECK: ret
}
|
