[PATCH] D67132: [PATCH] Improve support for atomicrmw and cmpxchg in C API.

[Nick Lewycky via Phabricator via llvm-commits]

nickwasmer created this revision.
Herald added a reviewer: deadalnix.
Herald added subscribers: llvm-commits, jfb, hiraditya.
Herald added a project: LLVM.

atomicrmw and cmpxchg have a volatile flag, so allow it to be set/get with
LLVMGetVolatile and LLVMSetVolatile. Add missing LLVMAtomicRMWBinOpFAdd and
LLVMAtomicRMWBinOpFSub enum constants. AtomicCmpXchg also has a weak flag,
add a getter/setter for that too. Add a getter/setter for the binary-op of
an atomicrmw.

While fixing atomics, I noticed that LLVMIsA## was missing for CatchSwitchInst,
CallBrInst and FenceInst, as well as AtomicCmpXchgInst and AtomicRMWInst.
Fixed them all.

Update llvm-c-test to include atomicrmw and to copy volatile for all four instructions.


https://reviews.llvm.org/D67132

Files:
  llvm/include/llvm-c/Core.h
  llvm/lib/IR/Core.cpp
  llvm/tools/llvm-c-test/echo.cpp

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