search for: demoteregtomem

> On Nov 17, 2014, at 5:50 PM, Reid Kleckner <rnk at google.com> wrote: > > On Mon, Nov 17, 2014 at 5:22 PM, Bob Wilson <bob.wilson at apple.com <mailto:bob.wilson at apple.com>> wrote: > I don’t know much about SEH and haven’t had time to really dig into this, but the idea of outlining functions that need to know about the frame layout sounds a bit scary. Is it

...ould be a boring old LLVM struct with a type created during CodeGenPrepare. > > I'm imagining a pass similar to SjLjEHPrepare that: > - Identifies all bbs reachable from landing pads > - Identifies all SSA values live in those bbs > - Demote all non-alloca SSA values to allocas (DemoteRegToMem, like sjlj) > - Combine all allocas used in landing pad bbs into a single LLVM alloca with a new combined struct type > - Outline code from landing pads into cleanup handlers, filters, catch handlers, etc > - In the parent function entry block, call @llvm.eh.seh.set_capture_block on the co...