[llvm] r239431 - Use AlignOf traits to enable static_assert.

[Pete Cooper]

Author: pete
Date: Tue Jun  9 15:58:03 2015
New Revision: 239431

URL: http://llvm.org/viewvc/llvm-project?rev=239431&view=rev
Log:
Use AlignOf traits to enable static_assert.

This is better than runtime asserts.  Thanks to David Blaikie for the help here.

Modified:
    llvm/trunk/lib/MC/MCSymbol.cpp

Modified: llvm/trunk/lib/MC/MCSymbol.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/MC/MCSymbol.cpp?rev=239431&r1=239430&r2=239431&view=diff
==============================================================================
--- llvm/trunk/lib/MC/MCSymbol.cpp (original)
+++ llvm/trunk/lib/MC/MCSymbol.cpp Tue Jun  9 15:58:03 2015
@@ -28,9 +28,9 @@ void *MCSymbol::operator new(size_t s, c
   // For safety, ensure that the alignment of a pointer is enough for an
   // MCSymbol.  This also ensures we don't need padding between the name and
   // symbol.
-  // FIXME: Use static_assert when constexpr is supported.
-  assert(alignOf<MCSymbol>() <= alignOf<NameEntryStorageTy>() &&
-         "Bad alignment of MCSymbol");
+  static_assert(AlignOf<MCSymbol>::Alignment <=
+                AlignOf<NameEntryStorageTy>::Alignment,
+                "Bad alignment of MCSymbol");
   void *Storage = Ctx.allocate(Size, alignOf<NameEntryStorageTy>());
   NameEntryStorageTy *Start = static_cast<NameEntryStorageTy*>(Storage);
   NameEntryStorageTy *End = Start + (Name ? 1 : 0);