[PATCH] D19475: [mips] Clang generates unaligned offset for MSA instruction st.d

[Matija Amidžić via llvm-commits]

mamidzic created this revision.
mamidzic added reviewers: dsanders, sdardis, zoran.jovanovic, zbuljan, hvarga.
mamidzic added subscribers: llvm-commits, petarj.
Herald added a reviewer: vkalintiris.
Herald added subscribers: sdardis, dsanders, danalbert, tberghammer.

Issue was found during compilation of V8 code inside android project with clang-3.9. 
The folowing messages was shown: 
`/tmp/preprocessor-v8-msa-repro-f130c4.s: Assembler messages:
/tmp/preprocessor-v8-msa-repro-f130c4.s:33112: Error: operand 2 out of range `st.d $w0,23($16)'
clang-3.9: error: assembler command failed with exit code 1 (use -v to see invocation)`

This issue is also manifesting on the latest upstream clang. More information [[ https://dmz-portal.mips.com/bugz/show_bug.cgi?id=2311 | here ]].
This patch checks and corrects unaligned offset for ST.* and LD.* Mips MSA instructions.

http://reviews.llvm.org/D19475

Files:
  lib/Target/Mips/MipsISelDAGToDAG.cpp
  lib/Target/Mips/MipsISelDAGToDAG.h
  lib/Target/Mips/MipsInstrInfo.td
  lib/Target/Mips/MipsMSAInstrInfo.td
  lib/Target/Mips/MipsSEISelDAGToDAG.cpp
  lib/Target/Mips/MipsSEISelDAGToDAG.h
  test/CodeGen/Mips/msa/i5_ld_st.ll

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