[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, 3 insertions, 2 deletions

diff --git a/llvm/tools/llvm-exegesis/lib/Analysis.cpp b/llvm/tools/llvm-exegesis/lib/Analysis.cpp
index 087100d..079fcd8 100644
--- a/llvm/tools/llvm-exegesis/lib/Analysis.cpp
+++ b/llvm/tools/llvm-exegesis/lib/Analysis.cpp
@@ -176,8 +176,9 @@ Analysis::Analysis(const Target &Target, std::unique_ptr<MCInstrInfo> InstrInfo,
       Triple(FirstPoint.LLVMTriple), 0 /*default variant*/, *AsmInfo_,
       *InstrInfo_, *RegInfo_));
 
-  Context_ = std::make_unique<MCContext>(AsmInfo_.get(), RegInfo_.get(),
-                                         &ObjectFileInfo_);
+  Context_ = std::make_unique<MCContext>(
+      Triple(FirstPoint.LLVMTriple), AsmInfo_.get(), RegInfo_.get(),
+      &ObjectFileInfo_, SubtargetInfo_.get());
   Disasm_.reset(Target.createMCDisassembler(*SubtargetInfo_, *Context_));
   assert(Disasm_ && "cannot create MCDisassembler. missing call to "
                     "InitializeXXXTargetDisassembler ?");