xref: /aosp_15_r20/external/llvm/test/Analysis/ValueTracking/known-non-equal.ll (revision 9880d6810fe72a1726cb53787c6711e909410d58) 
1*9880d681SAndroid Build Coastguard Worker; RUN: opt -instsimplify < %s -S | FileCheck %s
2*9880d681SAndroid Build Coastguard Worker
3*9880d681SAndroid Build Coastguard Worker; CHECK: define i1 @test
4*9880d681SAndroid Build Coastguard Workerdefine i1 @test(i8* %pq, i8 %B) {
5*9880d681SAndroid Build Coastguard Worker  %q = load i8, i8* %pq, !range !0 ; %q is known nonzero; no known bits
6*9880d681SAndroid Build Coastguard Worker  %A = add nsw i8 %B, %q
7*9880d681SAndroid Build Coastguard Worker  %cmp = icmp eq i8 %A, %B
8*9880d681SAndroid Build Coastguard Worker  ; CHECK: ret i1 false
9*9880d681SAndroid Build Coastguard Worker  ret i1 %cmp
10*9880d681SAndroid Build Coastguard Worker}
11*9880d681SAndroid Build Coastguard Worker
12*9880d681SAndroid Build Coastguard Worker; CHECK: define i1 @test2
13*9880d681SAndroid Build Coastguard Workerdefine i1 @test2(i8 %a, i8 %b) {
14*9880d681SAndroid Build Coastguard Worker  %A = or i8 %a, 2    ; %A[1] = 1
15*9880d681SAndroid Build Coastguard Worker  %B = and i8 %b, -3  ; %B[1] = 0
16*9880d681SAndroid Build Coastguard Worker  %cmp = icmp eq i8 %A, %B ; %A[1] and %B[1] are contradictory.
17*9880d681SAndroid Build Coastguard Worker  ; CHECK: ret i1 false
18*9880d681SAndroid Build Coastguard Worker  ret i1 %cmp
19*9880d681SAndroid Build Coastguard Worker}
20*9880d681SAndroid Build Coastguard Worker
21*9880d681SAndroid Build Coastguard Worker!0 = !{ i8 1, i8 5 }
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