[llvm-commits] [dragonegg] r129359 - in /dragonegg/trunk: include/dragonegg/Internals.h src/Constants.cpp src/Convert.cpp

[Duncan Sands]

Author: baldrick
Date: Tue Apr 12 06:54:40 2011
New Revision: 129359

URL: http://llvm.org/viewvc/llvm-project?rev=129359&view=rev
Log:
Add support for MISALIGNED_INDIRECT_REF in the hope of fixing PR9663.

Modified:
    dragonegg/trunk/include/dragonegg/Internals.h
    dragonegg/trunk/src/Constants.cpp
    dragonegg/trunk/src/Convert.cpp

Modified: dragonegg/trunk/include/dragonegg/Internals.h
URL: http://llvm.org/viewvc/llvm-project/dragonegg/trunk/include/dragonegg/Internals.h?rev=129359&r1=129358&r2=129359&view=diff
==============================================================================
--- dragonegg/trunk/include/dragonegg/Internals.h (original)
+++ dragonegg/trunk/include/dragonegg/Internals.h Tue Apr 12 06:54:40 2011
@@ -789,6 +789,7 @@
   LValue EmitLV_COMPONENT_REF(tree_node *exp);
   LValue EmitLV_DECL(tree_node *exp);
   LValue EmitLV_INDIRECT_REF(tree_node *exp);
+  LValue EmitLV_MISALIGNED_INDIRECT_REF(tree_node *exp);
   LValue EmitLV_VIEW_CONVERT_EXPR(tree_node *exp);
   LValue EmitLV_WITH_SIZE_EXPR(tree_node *exp);
   LValue EmitLV_XXXXPART_EXPR(tree_node *exp, unsigned Idx);

Modified: dragonegg/trunk/src/Constants.cpp
URL: http://llvm.org/viewvc/llvm-project/dragonegg/trunk/src/Constants.cpp?rev=129359&r1=129358&r2=129359&view=diff
==============================================================================
--- dragonegg/trunk/src/Constants.cpp (original)
+++ dragonegg/trunk/src/Constants.cpp Tue Apr 12 06:54:40 2011
@@ -1335,6 +1335,7 @@
     Addr = AddressOfDecl(exp);
     break;
   case INDIRECT_REF:
+  case MISALIGNED_INDIRECT_REF:
     Addr = AddressOfINDIRECT_REF(exp);
     break;
   case LABEL_DECL:

Modified: dragonegg/trunk/src/Convert.cpp
URL: http://llvm.org/viewvc/llvm-project/dragonegg/trunk/src/Convert.cpp?rev=129359&r1=129358&r2=129359&view=diff
==============================================================================
--- dragonegg/trunk/src/Convert.cpp (original)
+++ dragonegg/trunk/src/Convert.cpp Tue Apr 12 06:54:40 2011
@@ -1298,6 +1298,9 @@
   case INDIRECT_REF:
     LV = EmitLV_INDIRECT_REF(exp);
     break;
+  case MISALIGNED_INDIRECT_REF:
+    LV = EmitLV_MISALIGNED_INDIRECT_REF(exp);
+    break;
   }
 
   // Check that the type of the lvalue is indeed that of a pointer to the tree
@@ -5736,6 +5739,19 @@
   return LV;
 }
 
+LValue TreeToLLVM::EmitLV_MISALIGNED_INDIRECT_REF(tree exp) {
+  // The lvalue is just the address.  The alignment is given by operand 1.
+  unsigned Alignment = tree_low_cst(TREE_OPERAND(exp, 1), true);
+  if (!Alignment) Alignment = 8;
+  assert(!(Alignment & 7) && "Alignment not in octets!");
+  LValue LV = LValue(EmitRegister(TREE_OPERAND(exp, 0)), Alignment / 8);
+  // May need a useless type conversion (useless_type_conversion_p), for example
+  // when INDIRECT_REF is applied to a void*, resulting in a non-void type.
+  LV.Ptr = UselesslyTypeConvert(LV.Ptr,
+                                ConvertType(TREE_TYPE(exp))->getPointerTo());
+  return LV;
+}
+
 LValue TreeToLLVM::EmitLV_VIEW_CONVERT_EXPR(tree exp) {
   // The address is the address of the operand.
   LValue LV = EmitLV(TREE_OPERAND(exp, 0));
@@ -7873,6 +7889,7 @@
   case COMPONENT_REF:
   case IMAGPART_EXPR:
   case INDIRECT_REF:
+  case MISALIGNED_INDIRECT_REF:
   case REALPART_EXPR:
   case TARGET_MEM_REF:
   case VIEW_CONVERT_EXPR: