[llvm] r336311 - [demangler] Avoid alignment warning

[Serge Pavlov via llvm-commits]

Author: sepavloff
Date: Wed Jul  4 23:22:39 2018
New Revision: 336311

URL: http://llvm.org/viewvc/llvm-project?rev=336311&view=rev
Log:
[demangler] Avoid alignment warning

The alignment specified by a constant for the field
`BumpPointerAllocator::InitialBuffer` exceeded the alignment
guaranteed by `malloc` and `new` on Windows. This change set
the alignment value to that of `long double`, which is defined
by the used platform.

It fixes https://bugs.llvm.org/show_bug.cgi?id=37944.

Differential Revision: https://reviews.llvm.org/D48889

Modified:
    llvm/trunk/lib/Demangle/ItaniumDemangle.cpp

Modified: llvm/trunk/lib/Demangle/ItaniumDemangle.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Demangle/ItaniumDemangle.cpp?rev=336311&r1=336310&r2=336311&view=diff
==============================================================================
--- llvm/trunk/lib/Demangle/ItaniumDemangle.cpp (original)
+++ llvm/trunk/lib/Demangle/ItaniumDemangle.cpp Wed Jul  4 23:22:39 2018
@@ -1950,7 +1950,7 @@ class BumpPointerAllocator {
   static constexpr size_t AllocSize = 4096;
   static constexpr size_t UsableAllocSize = AllocSize - sizeof(BlockMeta);
 
-  alignas(16) char InitialBuffer[AllocSize];
+  alignas(long double) char InitialBuffer[AllocSize];
   BlockMeta* BlockList = nullptr;
 
   void grow() {