[cfe-commits] r102036 - /cfe/trunk/lib/AST/ASTContext.cpp

[Dan Gohman]

Author: djg
Date: Wed Apr 21 18:32:43 2010
New Revision: 102036

URL: http://llvm.org/viewvc/llvm-project?rev=102036&view=rev
Log:
When computing the alignof value for a vector type, ensure that
the alignment is a power of 2, even in the esoteric case of a
vector element which does not have a power-of-2 sizeof value.

Modified:
    cfe/trunk/lib/AST/ASTContext.cpp

Modified: cfe/trunk/lib/AST/ASTContext.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/AST/ASTContext.cpp?rev=102036&r1=102035&r2=102036&view=diff
==============================================================================
--- cfe/trunk/lib/AST/ASTContext.cpp (original)
+++ cfe/trunk/lib/AST/ASTContext.cpp Wed Apr 21 18:32:43 2010
@@ -515,7 +515,7 @@
     Align = Width;
     // If the alignment is not a power of 2, round up to the next power of 2.
     // This happens for non-power-of-2 length vectors.
-    if (VT->getNumElements() & (VT->getNumElements()-1)) {
+    if (Align & (Align-1)) {
       Align = llvm::NextPowerOf2(Align);
       Width = llvm::RoundUpToAlignment(Width, Align);
     }