1 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2 ; RUN: opt -O1 -S < %s | FileCheck %s
4 ; Make sure we reassociate and1 with and2 before instcombine to allow
6 ; (a & ~b) & ~c --> a & ~(b | c)
7 define i4 @not_reassociate_and_and_not(i4 %a, i4 %b, i4 %c, i4 %d) {
8 ; CHECK-LABEL: @not_reassociate_and_and_not(
9 ; CHECK-NEXT: [[TMP1:%.*]] = or i4 [[B:%.*]], [[C:%.*]]
10 ; CHECK-NEXT: [[TMP2:%.*]] = xor i4 [[TMP1]], -1
11 ; CHECK-NEXT: [[AND2:%.*]] = and i4 [[TMP2]], [[A:%.*]]
12 ; CHECK-NEXT: [[AND3:%.*]] = and i4 [[AND2]], [[D:%.*]]
13 ; CHECK-NEXT: ret i4 [[AND3]]
17 %and1 = and i4 %a, %notb
18 %and2 = and i4 %and1, %d
19 %and3 = and i4 %and2, %notc
23 ; (a | ~b) | ~c --> a | ~(b & c)
24 define i32 @not_reassociate_or_or_not(i32 %a, i32 %b, i32 %c, i32 %d) {
25 ; CHECK-LABEL: @not_reassociate_or_or_not(
26 ; CHECK-NEXT: [[TMP1:%.*]] = and i32 [[B:%.*]], [[C:%.*]]
27 ; CHECK-NEXT: [[TMP2:%.*]] = xor i32 [[TMP1]], -1
28 ; CHECK-NEXT: [[B2:%.*]] = or i32 [[TMP2]], [[A:%.*]]
29 ; CHECK-NEXT: [[B3:%.*]] = or i32 [[B2]], [[D:%.*]]
30 ; CHECK-NEXT: ret i32 [[B3]]
32 %notb = xor i32 %b, -1
33 %notc = xor i32 %c, -1
34 %b1 = or i32 %a, %notb
36 %b3 = or i32 %b2, %notc