[PATCH] [WIP] MSVC FPO debug information

[Jeff Muizelaar]

On Wed, Jun 17, 2015 at 5:04 PM, Reid Kleckner <rnk at google.com> wrote:
> 1. Build out the MC streamer support for the masm .fpo directive. This seems to handle everything we need.
> 2. Take the assembler output of llc for about three interesting prologue types, manually annotate it with FPO directives, assemble it, and verify that it's debuggable.
> 3. Add X86 opcodes for these directives and move them through the AsmPrinter, similar to SEH_Prologue, pushreg, etc.

I'll investigate this approach.

-Jeff