File: known-bits-from-range-md.ll

package info (click to toggle)
llvm-toolchain-13 1%3A13.0.1-6~deb11u1
  • links: PTS, VCS
  • area: main
  • in suites: bullseye
  • size: 1,418,812 kB
  • sloc: cpp: 5,290,827; ansic: 996,570; asm: 544,593; python: 188,212; objc: 72,027; lisp: 30,291; f90: 25,395; sh: 24,900; javascript: 9,780; pascal: 9,398; perl: 7,484; ml: 5,432; awk: 3,523; makefile: 2,892; xml: 953; cs: 573; fortran: 539
file content (34 lines) | stat: -rw-r--r-- 777 bytes parent folder | download | duplicates (18) 
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
 
; RUN: opt -S -instsimplify -instcombine < %s | FileCheck %s

define i1 @test0(i8* %ptr) {
; CHECK-LABEL: @test0(
 entry:
  %val = load i8, i8* %ptr, !range !{i8 -50, i8 0}
  %and = and i8 %val, 128
  %is.eq = icmp eq i8 %and, 128
  ret i1 %is.eq
; CHECK: ret i1 true
}

define i1 @test1(i8* %ptr) {
; CHECK-LABEL: @test1(
 entry:
  %val = load i8, i8* %ptr, !range !{i8 64, i8 128}
  %and = and i8 %val, 64
  %is.eq = icmp eq i8 %and, 64
  ret i1 %is.eq
; CHECK: ret i1 true
}

define i1 @test2(i8* %ptr) {
; CHECK-LABEL: @test2(
 entry:
; CHECK: %val = load i8
; CHECK: %and = and i8 %val
; CHECK: %is.eq = icmp ne i8 %and, 0
; CHECK: ret i1 %is.eq
  %val = load i8, i8* %ptr, !range !{i8 64, i8 129}
  %and = and i8 %val, 64
  %is.eq = icmp eq i8 %and, 64
  ret i1 %is.eq
}