[MC] Untangle MCContext and MCObjectFileInfo

This untangles the MCContext and the MCObjectFileInfo. There is a circular
dependency between MCContext and MCObjectFileInfo. Currently this dependency
also exists during construction: You can't contruct a MOFI without a MCContext
without constructing the MCContext with a dummy version of that MOFI first.
This removes this dependency during construction. In a perfect world,
MCObjectFileInfo wouldn't depend on MCContext at all, but only be stored in the
MCContext, like other MC information. This is future work.

This also shifts/adds more information to the MCContext making it more
available to the different targets. Namely:

- TargetTriple
- ObjectFileType
- SubtargetInfo

Reviewed By: MaskRay

Differential Revision: https://reviews.llvm.org/D101462

1 files changed, 2 insertions, 1 deletions

diff --git a/llvm/tools/llvm-cfi-verify/lib/FileAnalysis.cpp b/llvm/tools/llvm-cfi-verify/lib/FileAnalysis.cpp
index 8503112..695a162 100644
--- a/llvm/tools/llvm-cfi-verify/lib/FileAnalysis.cpp
+++ b/llvm/tools/llvm-cfi-verify/lib/FileAnalysis.cpp
@@ -407,7 +407,8 @@ Error FileAnalysis::initialiseDisassemblyMembers() {
   if (!MII)
     return make_error<UnsupportedDisassembly>("Failed to initialise MII.");
 
-  Context.reset(new MCContext(AsmInfo.get(), RegisterInfo.get(), &MOFI));
+  Context.reset(new MCContext(Triple(TripleName), AsmInfo.get(),
+                              RegisterInfo.get(), &MOFI, SubtargetInfo.get()));
 
   Disassembler.reset(
       ObjectTarget->createMCDisassembler(*SubtargetInfo, *Context));