[llvm-commits] [llvm-gcc-4.2] r46334 - /llvm-gcc-4.2/trunk/gcc/llvm-types.cpp

[Devang Patel]

Author: dpatel
Date: Thu Jan 24 17:56:38 2008
New Revision: 46334

URL: http://llvm.org/viewvc/llvm-project?rev=46334&view=rev
Log:
Fix 2008-01-24-StructAlignAndBitFields.c test case.
Bit-field type does not influence struct alignment.


Modified:
    llvm-gcc-4.2/trunk/gcc/llvm-types.cpp

Modified: llvm-gcc-4.2/trunk/gcc/llvm-types.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm-gcc-4.2/trunk/gcc/llvm-types.cpp?rev=46334&r1=46333&r2=46334&view=diff

==============================================================================
--- llvm-gcc-4.2/trunk/gcc/llvm-types.cpp (original)
+++ llvm-gcc-4.2/trunk/gcc/llvm-types.cpp Thu Jan 24 17:56:38 2008
@@ -1747,6 +1747,11 @@
 
   // Handle bit-fields specially.
   if (isBitfield(Field)) {
+    // Bit-field type does not influence structure alignment. 
+    // For example, struct A { char a; short b; int c:25; char d; } does not
+    // have 4 byte alignment. To enforce this rule, always use packed struct.
+    if (!Info.isPacked())
+      return false;
     DecodeStructBitField(Field, Info);
     return true;
   }