mibintc added inline comments.

================
Comment at: clang/lib/CodeGen/CGExprScalar.cpp:3006
 
+  CodeGenFunction::CGFPOptionsRAII FPOptsRAII(CGF, OpInfo.FPFeatures);
   SourceLocation Loc = E->getExprLoc();
----------------
kpn wrote:
> mibintc wrote:
> > What's the rule to follow about when we need to FPOptsRAII? 
> It is used on the border between code that has the AST node and code that 
> doesn't. If any code below this point might use the constrained floating 
> point intrinsics then the FPOptsRAII is needed.
> 
> Sometimes this border is at a call to the IRBuilder. Sometimes it's buried 
> elsewhere. The hope is that by having the location be defined there we can at 
> some point audit to verify we have it everywhere we should.
Oh, that doesn't sound very bug-proof.  Do you mind pointing out 2 different 
instances, one "AST node" and one "buried elsewhere"?  Or there's probably a 
code review I should read to find this?  Thank you


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D92596/new/

https://reviews.llvm.org/D92596

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