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(parent: 66589dc) | patch
[DAGCombiner] Respect volatility when checking for aliases
authorRichard Sandiford <rsandifo@linux.vnet.ibm.com>
Mon, 28 Oct 2013 12:00:00 +0000 (12:00 +0000)
committerRichard Sandiford <rsandifo@linux.vnet.ibm.com>
Mon, 28 Oct 2013 12:00:00 +0000 (12:00 +0000)
commita7be36c8eb4717e44b05e00008544b883fc87de9
treed6e0da0233f60d66565fec075a631691b0548e93tree | snapshot
parent66589dcc8fb5dcf0894a9a80a8dee890a4f3a379commit | diff
[DAGCombiner] Respect volatility when checking for aliases

Making useAA() default to true for SystemZ showed that the combiner alias
analysis wasn't handling volatile accesses.  This hit many of the SystemZ
tests, but I arbitrarily picked one for the purpose of this patch.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@193518 91177308-0d34-0410-b5e6-96231b3b80d8
lib/CodeGen/SelectionDAG/DAGCombiner.cpp diff | blob | history
test/CodeGen/SystemZ/bswap-02.ll diff | blob | history
C/C++ LLVM-based compilers that forbids OOTA behaviors