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d41761
2018 Jan 06
0
RFC: Legalize input operand to ATOMIC_CMP_SWAP* by zero-extending
I've already posted a patch (https://reviews.llvm.org/D41791) to do this,
but here's a bit of a background.
When the operands of an ISD::ATOMIC_CMP_SWAP{_WITH_SUCCESS} are legalized
by promoting to a larger type, they're extended without specifying whether
it's a sign or zero extension. However, an analogous node (SETCC) is
legalized by zero-ext...