[PATCH] D67845: SSP: [3/3] cmpxchg and addrspacecast can now trigger stack protection

[Paul Robinson via Phabricator via llvm-commits]

probinson created this revision.
probinson added reviewers: jdoerfert, efriedma, arsenm.
Herald added subscribers: jfb, hiraditya, wdng.
Herald added a project: LLVM.

cmpxchg has store-like semantics, and addrspacecast is like bitcast, as far as SSP is concerned.

The test is derived from captures.ll written by Matt Arsenault for r363169.
I tweaked it slightly, running 'llc' instead of 'opt' because StackProtector is a CodeGen pass not a Transform; I also added the llvm.memset test, which hadn't been covered before.
We could be smarter about avoiding stack canaries in the llvm.mem* case, but that's for another time.


https://reviews.llvm.org/D67845

Files:
  llvm/lib/CodeGen/StackProtector.cpp
  llvm/test/CodeGen/X86/stack-protector-2.ll

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