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| author | Arnold Schwaighofer <aschwaighofer@apple.com> | 2013-05-18 18:38:34 +0000 |
|---|---|---|
| committer | Arnold Schwaighofer <aschwaighofer@apple.com> | 2013-05-18 18:38:34 +0000 |
| commit | 688b5103eb4b70410d1ea54bcd8df4ef2f2ff8e8 (patch) | |
| tree | 47e826e7f6429f59bfe43a2a4b6d6ee0e04ae7ff /test/Transforms | |
| parent | edc399acebc94cfa26b47a6d8d836e2e1a009420 (diff) | |
| download | llvm-688b5103eb4b70410d1ea54bcd8df4ef2f2ff8e8.tar.gz llvm-688b5103eb4b70410d1ea54bcd8df4ef2f2ff8e8.tar.bz2 llvm-688b5103eb4b70410d1ea54bcd8df4ef2f2ff8e8.tar.xz | |
LoopVectorize: Handle single edge PHIs
We might encouter single edge PHIs - handle them with an identity select.
Fixes PR15990.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182199 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms')
| -rw-r--r-- | test/Transforms/LoopVectorize/if-conv-crash.ll | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/test/Transforms/LoopVectorize/if-conv-crash.ll b/test/Transforms/LoopVectorize/if-conv-crash.ll index 3283456aa3..f8f2cf1fff 100644 --- a/test/Transforms/LoopVectorize/if-conv-crash.ll +++ b/test/Transforms/LoopVectorize/if-conv-crash.ll @@ -37,3 +37,25 @@ if.end21: ; preds = %lor.lhs.false if.end25: ; preds = %entry ret void } + +; PR15990 +; We can have basic blocks with single entry PHI nodes. +define void @single_entry_phi(i32* %a, i32 *%b) { +entry: + br label %for.cond1.preheader + +for.cond1.preheader: + %inc10 = phi i32 [ 0, %entry ], [ %inc, %for.end ] + br label %for.end + +for.end: + %malicious.phi = phi i32 [ 0, %for.cond1.preheader ] + %inc = add nsw i32 %inc10, 1 + %tobool = icmp eq i32 %inc, 0 + br i1 %tobool, label %for.cond.for.end5, label %for.cond1.preheader + +for.cond.for.end5: + %and.lcssa = phi i32 [ %malicious.phi, %for.end ] + store i32 %and.lcssa, i32* %a, align 4 + ret void +} |