Nemanja Ivanovic ebb23078e9 [PowerPC] Zero-extend the compare operand for ATOMIC_CMP_SWAP ...

Part of the fix for https://bugs.llvm.org/show_bug.cgi?id=35812.
This patch ensures that the compare operand for the atomic compare and swap
is properly zero-extended to 32 bits if applicable.
A follow-up commit will fix the extension for the SETCC node generated when
expanding an ATOMIC_CMP_SWAP_WITH_SUCCESS. That will complete the bug fix.

Differential Revision: https://reviews.llvm.org/D41856

llvm-svn: 322372

2018-01-12 14:58:41 +00:00

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