xref: /llvm-project/llvm/test/Transforms/InstCombine/pr82877.ll (revision abe4677d9f8ab82f722f29dbf57952052accd70b)
1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 4
2; RUN: opt -S -passes=instcombine < %s | FileCheck %s
3
4define i64 @func(i32 %p, i1 %cmp1) {
5; CHECK-LABEL: define i64 @func(
6; CHECK-SAME: i32 [[P:%.*]], i1 [[CMP1:%.*]]) {
7; CHECK-NEXT:  entry:
8; CHECK-NEXT:    [[NOT:%.*]] = xor i32 [[P]], -1
9; CHECK-NEXT:    br label [[FOR_BODY:%.*]]
10; CHECK:       for.body:
11; CHECK-NEXT:    [[P0:%.*]] = phi i32 [ [[NOT]], [[ENTRY:%.*]] ], [ [[CONV:%.*]], [[FOR_BODY]] ]
12; CHECK-NEXT:    [[COND:%.*]] = select i1 [[CMP1]], i32 0, i32 -1231558963
13; CHECK-NEXT:    [[XOR:%.*]] = xor i32 [[COND]], [[P0]]
14; CHECK-NEXT:    [[CMP2:%.*]] = icmp ne i32 [[XOR]], 1
15; CHECK-NEXT:    [[CONV]] = zext i1 [[CMP2]] to i32
16; CHECK-NEXT:    br i1 [[CMP2]], label [[FOR_BODY]], label [[FOR_EXIT:%.*]]
17; CHECK:       for.exit:
18; CHECK-NEXT:    ret i64 0
19;
20entry:
21  %not = xor i32 %p, -1
22  br label %for.body
23
24for.body:
25  %p0 = phi i32 [ %not, %entry ], [ %conv, %for.body ]
26  %cond = select i1 %cmp1, i32 0, i32 -1231558963
27  %xor = xor i32 %cond, %p0
28  %cmp2 = icmp ne i32 %xor, 1
29  %conv = zext i1 %cmp2 to i32
30  br i1 %cmp2, label %for.body, label %for.exit
31
32for.exit:
33  ret i64 0
34}
35