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This reverts commit r306819 which appears be exposing underlying
issues in a stage1 ppc64be build
llvm-svn: 306820
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As discussed in D34087, rewrite areNonVolatileConsecutiveLoads using
generic checks. Also, propagate missing local handling from there to
BaseIndexOffset checks.
Tests of note:
* test/CodeGen/X86/build-vector* - Improved.
* test/CodeGen/BPF/undef.ll - Improved store alignment allows an
additional store merge
* test/CodeGen/X86/clear_upper_vector_element_bits.ll - This is a
case we already do not handle well. Here, the DAG is improved, but
scheduling causes a code size degradation.
Reviewers: RKSimon, craig.topper, spatel, andreadb, filcab
Subscribers: nemanjai, llvm-commits
Differential Revision: https://reviews.llvm.org/D34472
llvm-svn: 306819
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Relanding after restricting equalBaseIndex to not erroneuosly consider
a FrameIndices stemming from alloca from being comparable as its
offset is set post-selectionDAG.
Pull FrameIndex comparision reasoning from DAGCombiner::isAlias to
general BaseIndexOffset.
llvm-svn: 306688
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This reverts commit r306498 which appears to cause a compilrt-rt test failures
llvm-svn: 306501
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Pull FrameIndex comparision reasoning from DAGCombiner::isAlias to
general BaseIndexOffset.
llvm-svn: 306498
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Move BaseIndexOffset analysis out of DAGCombiner for use in other
files.
llvm-svn: 305921
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