xref: /llvm-project/llvm/test/Transforms/SCCP/phi-cycle.ll (revision 8ebb3eac02a926ffa4298c12834c57aefb2e8579)
1b3754375SFlorian Hahn; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2*8ebb3eacSBjorn Pettersson; RUN: opt -passes=ipsccp -S %s | FileCheck %s
3b3754375SFlorian Hahn
4b3754375SFlorian Hahndeclare i1 @cond()
5b3754375SFlorian Hahn
6b3754375SFlorian Hahndefine i32 @test() {
7b3754375SFlorian Hahn; CHECK-LABEL: @test(
8b3754375SFlorian Hahn; CHECK-NEXT:  entry:
9b3754375SFlorian Hahn; CHECK-NEXT:    br label [[LOOP:%.*]]
10b3754375SFlorian Hahn; CHECK:       loop:
11b3754375SFlorian Hahn; CHECK-NEXT:    [[C_1:%.*]] = call i1 @cond()
12b3754375SFlorian Hahn; CHECK-NEXT:    br i1 [[C_1]], label [[LOOP]], label [[LATCH_2:%.*]]
13b3754375SFlorian Hahn; CHECK:       latch.2:
14b3754375SFlorian Hahn; CHECK-NEXT:    [[C_2:%.*]] = call i1 @cond()
15b3754375SFlorian Hahn; CHECK-NEXT:    br i1 [[C_2]], label [[LOOP]], label [[EXIT:%.*]]
16b3754375SFlorian Hahn; CHECK:       exit:
17b3754375SFlorian Hahn; CHECK-NEXT:    ret i32 0
18b3754375SFlorian Hahn;
19b3754375SFlorian Hahnentry:
20b3754375SFlorian Hahn  br label %loop
21b3754375SFlorian Hahn
22b3754375SFlorian Hahnloop:
23b3754375SFlorian Hahn  %p = phi i32 [ undef, %entry ], [ 0, %latch.2 ], [ %p, %loop]
24b3754375SFlorian Hahn  %c.1 = call i1 @cond()
25b3754375SFlorian Hahn  br i1 %c.1, label %loop, label %latch.2
26b3754375SFlorian Hahn
27b3754375SFlorian Hahnlatch.2:
28b3754375SFlorian Hahn  %c.2 = call i1 @cond()
29b3754375SFlorian Hahn  br i1 %c.2, label %loop, label %exit
30b3754375SFlorian Hahn
31b3754375SFlorian Hahnexit:
32b3754375SFlorian Hahn  ret i32 %p
33b3754375SFlorian Hahn}
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