diff options
Diffstat (limited to 'llvm')
| -rw-r--r-- | llvm/lib/Transforms/Vectorize/LoopVectorize.cpp | 4 | ||||
| -rw-r--r-- | llvm/test/Transforms/LoopVectorize/if-conv-crash.ll | 39 |
2 files changed, 43 insertions, 0 deletions
diff --git a/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp b/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp index feeececedb9..a69124032be 100644 --- a/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp +++ b/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp @@ -1263,6 +1263,10 @@ bool LoopVectorizationLegality::canVectorizeWithIfConvert() { for (unsigned i = 0, e = LoopBlocks.size(); i < e; ++i) { BasicBlock *BB = LoopBlocks[i]; + // We don't support switch statements inside loops. + if (!isa<BranchInst>(BB->getTerminator())) + return false; + // We must have at most two predecessors because we need to convert // all PHIs to selects. unsigned Preds = std::distance(pred_begin(BB), pred_end(BB)); diff --git a/llvm/test/Transforms/LoopVectorize/if-conv-crash.ll b/llvm/test/Transforms/LoopVectorize/if-conv-crash.ll new file mode 100644 index 00000000000..c82df5a9be8 --- /dev/null +++ b/llvm/test/Transforms/LoopVectorize/if-conv-crash.ll @@ -0,0 +1,39 @@ +; RUN: opt < %s -loop-vectorize -force-vector-width=4 -enable-if-conversion + +target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128" +target triple = "x86_64-apple-macosx10.8.0" + +define fastcc void @DD_dump() nounwind uwtable ssp { +entry: + br i1 undef, label %lor.lhs.false, label %if.end25 + +lor.lhs.false: ; preds = %entry + br i1 undef, label %if.end21, label %if.else + +if.else: ; preds = %lor.lhs.false + br i1 undef, label %num_q.exit, label %while.body.i.preheader + +while.body.i.preheader: ; preds = %if.else + br label %while.body.i + +while.body.i: ; preds = %if.end.i, %while.body.i.preheader + switch i8 undef, label %if.end.i [ + i8 39, label %if.then.i + i8 92, label %if.then.i + ] + +if.then.i: ; preds = %while.body.i, %while.body.i + br label %if.end.i + +if.end.i: ; preds = %if.then.i, %while.body.i + br i1 undef, label %num_q.exit, label %while.body.i + +num_q.exit: ; preds = %if.end.i, %if.else + unreachable + +if.end21: ; preds = %lor.lhs.false + unreachable + +if.end25: ; preds = %entry + ret void +} |
