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
|
; RUN: llc -verify-machineinstrs -mtriple=powerpc64le-unknown-linux-gnu < %s | FileCheck %s
; RUN: llc -verify-machineinstrs -mtriple=powerpc64-unknown-linux-gnu < %s | FileCheck %s
; Make sure that the subfic is generated iff possible
define i64 @subtract_from_imm1(i64 %v) nounwind readnone {
entry:
; CHECK-LABEL: subtract_from_imm1
; CHECK: subfic 3, 3, 32767
; CHECK: blr
%sub = sub i64 32767, %v
ret i64 %sub
}
define i64 @subtract_from_imm2(i64 %v) nounwind readnone {
entry:
; CHECK-LABEL: subtract_from_imm2
; CHECK-NOT: subfic
; CHECK: blr
%sub = sub i64 32768, %v
ret i64 %sub
}
define i64 @subtract_from_imm3(i64 %v) nounwind readnone {
entry:
; CHECK-LABEL: subtract_from_imm3
; CHECK: subfic 3, 3, -32768
; CHECK: blr
%sub = sub i64 -32768, %v
ret i64 %sub
}
define i64 @subtract_from_imm4(i64 %v) nounwind readnone {
entry:
; CHECK-LABEL: subtract_from_imm4
; CHECK-NOT: subfic
; CHECK: blr
%sub = sub i64 -32769, %v
ret i64 %sub
}
|
