[PATCH] D66978: [CodeGen] Fix lowering for returning the result of an extractvalue

[Dan Gohman via Phabricator via llvm-commits]

sunfish created this revision.
sunfish added a reviewer: tlively.
Herald added subscribers: aheejin, jgravelle-google, sbc100, dschuff.
Herald added a project: LLVM.

When the number of return values exceeds the number of registers available, `SelectionDAGBuilder::visitRet` transforms a function's return to use a pointer to a buffer to hold return values. When the returned value is an operator such as `extractvalue`, the value may have a non-zero result number. Add that number to the indexing when obtaining the values to store.

This fixes https://bugs.llvm.org/show_bug.cgi?id=43132.


Repository:
  rL LLVM

https://reviews.llvm.org/D66978

Files:
  lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
  test/CodeGen/WebAssembly/multi-return.ll

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