diff options
| -rw-r--r-- | lib/CodeGen/SelectionDAG/DAGCombiner.cpp | 3 | ||||
| -rw-r--r-- | test/CodeGen/X86/2012-12-12-DAGCombineCrash.ll | 46 |
2 files changed, 48 insertions, 1 deletions
diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp index 893cf2036a..7c54d17275 100644 --- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp +++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp @@ -2984,7 +2984,8 @@ SDValue DAGCombiner::MatchBSwapHWord(SDNode *N, SDValue N0, SDValue N1) { SDValue N00 = N0.getOperand(0); SDValue N01 = N0.getOperand(1); - if (N1.getOpcode() == ISD::OR) { + if (N1.getOpcode() == ISD::OR && + N00.getNumOperands() == 2 && N01.getNumOperands() == 2) { // (or (or (and), (and)), (or (and), (and))) SDValue N000 = N00.getOperand(0); if (!isBSwapHWordElement(N000, Parts)) diff --git a/test/CodeGen/X86/2012-12-12-DAGCombineCrash.ll b/test/CodeGen/X86/2012-12-12-DAGCombineCrash.ll new file mode 100644 index 0000000000..8cef2c8201 --- /dev/null +++ b/test/CodeGen/X86/2012-12-12-DAGCombineCrash.ll @@ -0,0 +1,46 @@ +; RUN: llc -march=x86 -mtriple=i686-apple-ios -mcpu=yonah < %s +; rdar://12868039 + +define void @t() nounwind ssp { + %1 = alloca i32 + %2 = ptrtoint i32* %1 to i32 + br label %3 + +; <label>:3 ; preds = %5, %3, %0 + switch i32 undef, label %3 [ + i32 611946160, label %5 + i32 954117870, label %4 + ] + +; <label>:4 ; preds = %3 + ret void + +; <label>:5 ; preds = %5, %3 + %6 = add i32 0, 148 + %7 = and i32 %6, 48 + %8 = add i32 %7, 0 + %9 = or i32 %2, %8 + %10 = xor i32 -1, %2 + %11 = or i32 %8, %10 + %12 = or i32 %9, %11 + %13 = xor i32 %9, %11 + %14 = sub i32 %12, %13 + %15 = xor i32 2044674005, %14 + %16 = xor i32 %15, 0 + %17 = shl nuw nsw i32 %16, 1 + %18 = sub i32 0, %17 + %19 = and i32 %18, 2051242402 + %20 = sub i32 0, %19 + %21 = xor i32 %20, 0 + %22 = xor i32 %21, 0 + %23 = add i32 0, %22 + %24 = shl i32 %23, 1 + %25 = or i32 1, %24 + %26 = add i32 0, %25 + %27 = trunc i32 %26 to i8 + %28 = xor i8 %27, 125 + %29 = add i8 %28, -16 + %30 = add i8 0, %29 + store i8 %30, i8* null + br i1 undef, label %5, label %3 +} |