[PATCH] D69875: Allow "callbr" to return non-void values

[Bill Wendling via Phabricator via cfe-commits]

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THIS IS A WIP!

Remove the restrictions that preventing "callbr" from returning non-void
values. The value returned by "callbr" is only valid on the "normal" path.
Values used on "abnormal" paths are poisoned.

Allow output constraints on "asm goto"


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D69875

Files:
  clang/include/clang/AST/Stmt.h
  clang/lib/AST/Stmt.cpp
  clang/lib/Parse/ParseStmtAsm.cpp
  clang/lib/Sema/SemaStmtAsm.cpp
  clang/test/Parser/asm-goto.c
  clang/test/Parser/asm-goto.cpp
  llvm/lib/AsmParser/LLParser.cpp
  llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
  llvm/lib/IR/Verifier.cpp
  llvm/test/CodeGen/X86/callbr-asm-outputs.ll

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