File: add-with-overflow.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-- 1,146 bytes parent folder | download | duplicates (14)
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 < %s
; RUN: llc < %s -fast-isel

@ok = internal constant [4 x i8] c"%d\0A\00"
@no = internal constant [4 x i8] c"no\0A\00"

define i1 @func1(i32 %v1, i32 %v2) nounwind {
entry:
  %t = call {i32, i1} @llvm.sadd.with.overflow.i32(i32 %v1, i32 %v2)
  %sum = extractvalue {i32, i1} %t, 0
  %obit = extractvalue {i32, i1} %t, 1
  br i1 %obit, label %overflow, label %normal

normal:
  %t1 = tail call i32 (ptr, ...) @printf( ptr @ok, i32 %sum ) nounwind
  ret i1 true

overflow:
  %t2 = tail call i32 (ptr, ...) @printf( ptr @no ) nounwind
  ret i1 false
}

define i1 @func2(i32 %v1, i32 %v2) nounwind {
entry:
  %t = call {i32, i1} @llvm.uadd.with.overflow.i32(i32 %v1, i32 %v2)
  %sum = extractvalue {i32, i1} %t, 0
  %obit = extractvalue {i32, i1} %t, 1
  br i1 %obit, label %overflow, label %normal

normal:
  %t1 = tail call i32 (ptr, ...) @printf( ptr @ok, i32 %sum ) nounwind
  ret i1 true

overflow:
  %t2 = tail call i32 (ptr, ...) @printf( ptr @no ) nounwind
  ret i1 false
}

declare i32 @printf(ptr, ...) nounwind
declare {i32, i1} @llvm.sadd.with.overflow.i32(i32, i32)
declare {i32, i1} @llvm.uadd.with.overflow.i32(i32, i32)