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| author | Jan Wen Voung <jvoung@google.com> | 2013-03-12 16:27:52 +0000 |
|---|---|---|
| committer | Jan Wen Voung <jvoung@google.com> | 2013-03-12 16:27:52 +0000 |
| commit | 4323665bd857c0527b50463d415d9e76493ad2fe (patch) | |
| tree | 041705048758b7962b7ec89eadc50e76513393c8 /test/Transforms/LoopUnswitch/infinite-loop.ll | |
| parent | a15e708b1b05cfb9d3d126e12f508e37adc25fdb (diff) | |
| download | llvm-4323665bd857c0527b50463d415d9e76493ad2fe.tar.gz llvm-4323665bd857c0527b50463d415d9e76493ad2fe.tar.bz2 llvm-4323665bd857c0527b50463d415d9e76493ad2fe.tar.xz | |
Revert the test moves from 176733. Use "REQUIRES: asserts" instead.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176873 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms/LoopUnswitch/infinite-loop.ll')
| -rw-r--r-- | test/Transforms/LoopUnswitch/infinite-loop.ll | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/test/Transforms/LoopUnswitch/infinite-loop.ll b/test/Transforms/LoopUnswitch/infinite-loop.ll new file mode 100644 index 0000000000..8261e38937 --- /dev/null +++ b/test/Transforms/LoopUnswitch/infinite-loop.ll @@ -0,0 +1,58 @@ +; REQUIRES: asserts +; RUN: opt -loop-unswitch -disable-output -stats -info-output-file - < %s | FileCheck --check-prefix=STATS %s +; RUN: opt -loop-unswitch -simplifycfg -S < %s | FileCheck %s +; PR5373 + +; Loop unswitching shouldn't trivially unswitch the true case of condition %a +; in the code here because it leads to an infinite loop. While this doesn't +; contain any instructions with side effects, it's still a kind of side effect. +; It can trivially unswitch on the false cas of condition %a though. + +; STATS: 2 loop-unswitch - Number of branches unswitched +; STATS: 1 loop-unswitch - Number of unswitches that are trivial + +; CHECK: @func_16 +; CHECK-NEXT: entry: +; CHECK-NEXT: br i1 %a, label %entry.split, label %abort0.split + +; CHECK: entry.split: +; CHECK-NEXT: br i1 %b, label %cond.end.us, label %abort1 + +; CHECK: cond.end.us: +; CHECK-NEXT: br label %cond.end.us + +; CHECK: abort0.split: +; CHECK-NEXT: call void @end0() [[NOR_NUW:#[0-9]+]] +; CHECK-NEXT: unreachable + +; CHECK: abort1: +; CHECK-NEXT: call void @end1() [[NOR_NUW]] +; CHECK-NEXT: unreachable + +; CHECK: } + +define void @func_16(i1 %a, i1 %b) nounwind { +entry: + br label %for.body + +for.body: + br i1 %a, label %cond.end, label %abort0 + +cond.end: + br i1 %b, label %for.body, label %abort1 + +abort0: + call void @end0() noreturn nounwind + unreachable + +abort1: + call void @end1() noreturn nounwind + unreachable +} + +declare void @end0() noreturn +declare void @end1() noreturn + +; CHECK: attributes #0 = { nounwind } +; CHECK: attributes #1 = { noreturn } +; CHECK: attributes [[NOR_NUW]] = { noreturn nounwind } |