Merge r245577 into branch_37

[ARM] Don't try and custom lower a vNi64 SETCC.

It won't go well. We've already marked 64-bit SETCCs as non-Custom, but it's
just possible that a SETCC has a legal result type but an illegal operand
type. If this happens, bail out before we create unselectable nodes.

Fixes PR24292. I tried to create a testcase but in 99% of cases we can't
trigger this - not surprising that this bug has been latent since 2009.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_37@245578 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/ARM/ARMISelLowering.cpp b/lib/Target/ARM/ARMISelLowering.cpp
index e335784f6d876cf742e6da081b1bd049cce8da3e..8cc06df716336d5bf59842ce68066c4da1235d9b 100644 (file)
--- a/lib/Target/ARM/ARMISelLowering.cpp
+++ b/lib/Target/ARM/ARMISelLowering.cpp
@@ -4583,6 +4583,12 @@ static SDValue LowerVSETCC(SDValue Op, SelectionDAG &DAG) {
   ISD::CondCode SetCCOpcode = cast<CondCodeSDNode>(CC)->get();
   SDLoc dl(Op);
 
+  if (CmpVT.getVectorElementType() == MVT::i64)
+    // 64-bit comparisons are not legal. We've marked SETCC as non-Custom,
+    // but it's possible that our operands are 64-bit but our result is 32-bit.
+    // Bail in this case.
+    return SDValue();
+
   if (Op1.getValueType().isFloatingPoint()) {
     switch (SetCCOpcode) {
     default: llvm_unreachable("Illegal FP comparison");