File: subtract_from_imm.ll

package info (click to toggle)
llvm-toolchain-20 1%3A20.1.6-1~exp1
  • links: PTS, VCS
  • area: main
  • in suites: experimental
  • size: 2,111,304 kB
  • sloc: cpp: 7,438,677; ansic: 1,393,822; asm: 1,012,926; python: 241,650; f90: 86,635; objc: 75,479; lisp: 42,144; pascal: 17,286; sh: 10,027; ml: 5,082; perl: 4,730; awk: 3,523; makefile: 3,349; javascript: 2,251; xml: 892; fortran: 672
file content (41 lines) | stat: -rw-r--r-- 969 bytes parent folder | download | duplicates (29) 
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
}