2008-05-06 H.J. Lu <hongjiu.lu@intel.com>

[pf3gnuchains/gcc-fork.git] / gcc / config / i386 / i386.c

diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index a61bfb7..d0ebd80 100644 (file)
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -4579,12 +4579,12 @@ ix86_pass_by_reference (CUMULATIVE_ARGS *cum ATTRIBUTE_UNUSED,
 }
 
 /* Return true when TYPE should be 128bit aligned for 32bit argument passing
-   ABI.  Only called if TARGET_SSE.  */
+   ABI.  */
 static bool
-contains_128bit_aligned_vector_p (tree type)
+contains_aligned_value_p (tree type)
 {
   enum machine_mode mode = TYPE_MODE (type);
-  if (SSE_REG_MODE_P (mode)
+  if (((TARGET_SSE && SSE_REG_MODE_P (mode)) || mode == TDmode)
       && (!TYPE_USER_ALIGN (type) || TYPE_ALIGN (type) > 128))
     return true;
   if (TYPE_ALIGN (type) < 128)
@@ -4605,7 +4605,7 @@ contains_128bit_aligned_vector_p (tree type)
            for (field = TYPE_FIELDS (type); field; field = TREE_CHAIN (field))
              {
                if (TREE_CODE (field) == FIELD_DECL
-                   && contains_128bit_aligned_vector_p (TREE_TYPE (field)))
+                   && contains_aligned_value_p (TREE_TYPE (field)))
                  return true;
              }
            break;
@@ -4613,7 +4613,7 @@ contains_128bit_aligned_vector_p (tree type)
 
        case ARRAY_TYPE:
          /* Just for use if some languages passes arrays by value.  */
-         if (contains_128bit_aligned_vector_p (TREE_TYPE (type)))
+         if (contains_aligned_value_p (TREE_TYPE (type)))
            return true;
          break;
 
@@ -4637,8 +4637,8 @@ ix86_function_arg_boundary (enum machine_mode mode, tree type)
     align = GET_MODE_ALIGNMENT (mode);
   if (align < PARM_BOUNDARY)
     align = PARM_BOUNDARY;
-  /* Decimal floating point is aligned to its natural boundary.  */
-  if (!TARGET_64BIT && !VALID_DFP_MODE_P (mode))
+  /* In 32bit, only _Decimal128 is aligned to its natural boundary.  */
+  if (!TARGET_64BIT && mode != TDmode)
     {
       /* i386 ABI defines all arguments to be 4 byte aligned.  We have to
         make an exception for SSE modes since these require 128bit
@@ -4647,16 +4647,14 @@ ix86_function_arg_boundary (enum machine_mode mode, tree type)
         The handling here differs from field_alignment.  ICC aligns MMX
         arguments to 4 byte boundaries, while structure fields are aligned
         to 8 byte boundaries.  */
-      if (!TARGET_SSE)
-       align = PARM_BOUNDARY;
-      else if (!type)
+      if (!type)
        {
-         if (!SSE_REG_MODE_P (mode))
+         if (!(TARGET_SSE && SSE_REG_MODE_P (mode)) && mode != TDmode)
            align = PARM_BOUNDARY;
        }
       else
        {
-         if (!contains_128bit_aligned_vector_p (type))
+         if (!contains_aligned_value_p (type))
            align = PARM_BOUNDARY;
        }
     }