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authorAndrea Di Biagio <Andrea_DiBiagio@sn.scee.net>2014-03-22 01:47:22 +0000
committerAndrea Di Biagio <Andrea_DiBiagio@sn.scee.net>2014-03-22 01:47:22 +0000
commitd47cb57ab88956197c266df3353347eb31790781 (patch)
treeb09d18ac4d85405c17bbc2ab48eede93f230124a /test/Transforms/ConstantHoisting
parent4696def45d683f1b1ebed8d85688f4c31fce6258 (diff)
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[DAG] Fix an assertion failure caused by an invalid cast in method 'BuildVectorSDNode::isConstantSplat'
This patch renames method 'isConstantSplat' as 'getConstantSplatValue' (mainly for consistency reasons), and rewrites its logic to ensure that we always perform a legal 'cast<ConstantSDNode>'. Added test shift-combine-crash.ll to verify that DAGCombiner no longer crashes with an assertion failure in the attempt to simplify a vector shift by a vector of all undef counts. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204536 91177308-0d34-0410-b5e6-96231b3b80d8
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