xref: /llvm-project/llvm/test/Transforms/GuardWidening/hang.ll (revision 2b9509627caa2b0ca27eb1b05099eb016491f027) 
1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 2
2; RUN: opt -S -passes=guard-widening < %s | FileCheck %s
3
4; Make sure we don't hang here.
5define i64 @test() {
6; CHECK-LABEL: define i64 @test() {
7; CHECK-NEXT:  bb:
8; CHECK-NEXT:    [[DOTGW_FR:%.*]] = freeze i1 poison
9; CHECK-NEXT:    [[WIDE_CHK:%.*]] = and i1 poison, [[DOTGW_FR]]
10; CHECK-NEXT:    call void (i1, ...) @llvm.experimental.guard(i1 [[WIDE_CHK]]) [ "deopt"() ]
11; CHECK-NEXT:    br label [[BB2:%.*]]
12; CHECK:       bb2:
13; CHECK-NEXT:    br i1 poison, label [[BB3:%.*]], label [[BB2]]
14; CHECK:       bb3:
15; CHECK-NEXT:    [[CALL:%.*]] = call i64 (...) @llvm.experimental.deoptimize.i64() [ "deopt"() ]
16; CHECK-NEXT:    ret i64 [[CALL]]
17;
18bb:
19  call void (i1, ...) @llvm.experimental.guard(i1 poison) [ "deopt"() ]
20  br label %bb2
21
22bb2:                                              ; preds = %bb2, %bb
23  br i1 poison, label %bb3, label %bb2
24
25bb3:                                              ; preds = %bb2
26  call void (i1, ...) @llvm.experimental.guard(i1 poison) [ "deopt"() ]
27  %call = call i64 (...) @llvm.experimental.deoptimize.i64() [ "deopt"() ]
28  ret i64 %call
29}
30
31declare i64 @llvm.experimental.deoptimize.i64(...)
32
33declare void @llvm.experimental.guard(i1, ...)
34