diff options
| -rw-r--r-- | lib/Transforms/Vectorize/LoopVectorize.cpp | 5 | ||||
| -rw-r--r-- | test/Transforms/LoopVectorize/lcssa-crash.ll | 11 |
2 files changed, 15 insertions, 1 deletions
diff --git a/lib/Transforms/Vectorize/LoopVectorize.cpp b/lib/Transforms/Vectorize/LoopVectorize.cpp index 4f6f51c9bb..bc420bd6a9 100644 --- a/lib/Transforms/Vectorize/LoopVectorize.cpp +++ b/lib/Transforms/Vectorize/LoopVectorize.cpp @@ -2308,7 +2308,10 @@ bool LoopVectorizationLegality::canVectorizeWithIfConvert() { } bool LoopVectorizationLegality::canVectorize() { - assert(TheLoop->getLoopPreheader() && "No preheader!!"); + // We must have a loop in canonical form. Loops with indirectbr in them cannot + // be canonicalized. + if (!TheLoop->getLoopPreheader()) + return false; // We can only vectorize innermost loops. if (TheLoop->getSubLoopsVector().size()) diff --git a/test/Transforms/LoopVectorize/lcssa-crash.ll b/test/Transforms/LoopVectorize/lcssa-crash.ll index 06b3b08aa0..de6be54849 100644 --- a/test/Transforms/LoopVectorize/lcssa-crash.ll +++ b/test/Transforms/LoopVectorize/lcssa-crash.ll @@ -27,3 +27,14 @@ for.end.i.i.i: unreachable } +; PR16139 +define void @test2(i8* %x) { +entry: + indirectbr i8* %x, [ label %L0, label %L1 ] + +L0: + br label %L0 + +L1: + ret void +} |