[PATCH] Fix for PR14269: Clang crashes when a bit field is used as inline assembler input / output with memory constraint

[Richard Smith]

REPOSITORY
  rL LLVM

================
Comment at: cfe/trunk/lib/Sema/SemaStmtAsm.cpp:158
@@ +157,3 @@
+    // Bitfield can't be referenced with a pointer.
+    if (Info.allowsMemory() && OutputExpr->refersToBitField())
+      return StmtError(Diag(OutputExpr->getLocStart(),
----------------
What about other weird kinds of lvalues, like the result of `__real` / `__imag`, vector indexing, and global register variables? Those have the same problem; CGStmt.cpp blindly calls `LValue::getAddress` without checking for those cases.

Testcase:

    typedef __attribute__((vector_size(16))) int vi4;
    void test(vi4 v) {
      __asm__("" : "=rm"(v[2]));
    }

http://reviews.llvm.org/D10086

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