[PATCH] D30978: [DAGCombine] Bail out if can't create a vector with at least two elements
Zvi Rackover via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Wed Mar 15 05:15:53 PDT 2017
zvi created this revision.
Fixes pr32278
Repository:
rL LLVM
https://reviews.llvm.org/D30978
Files:
lib/CodeGen/SelectionDAG/DAGCombiner.cpp
test/CodeGen/Generic/pr32278.ll
Index: test/CodeGen/Generic/pr32278.ll
===================================================================
--- test/CodeGen/Generic/pr32278.ll
+++ test/CodeGen/Generic/pr32278.ll
@@ -1,5 +1,4 @@
; PR32278
-; XFAIL: *
; RUN: llc < %s
Index: lib/CodeGen/SelectionDAG/DAGCombiner.cpp
===================================================================
--- lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -14098,8 +14098,11 @@
if (!SclTy.isFloatingPoint() && !SclTy.isInteger())
return SDValue();
- EVT NVT = EVT::getVectorVT(*DAG.getContext(), SclTy,
- VT.getSizeInBits() / SclTy.getSizeInBits());
+ unsigned VNTNumElms = VT.getSizeInBits() / SclTy.getSizeInBits();
+ if (VNTNumElms < 2)
+ return SDValue();
+
+ EVT NVT = EVT::getVectorVT(*DAG.getContext(), SclTy, VNTNumElms);
if (!TLI.isTypeLegal(NVT) || !TLI.isTypeLegal(Scalar.getValueType()))
return SDValue();
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