* cppbuiltin.c (define_builtin_macros_for_type_sizes): Round

pointer size up to a power of two.
* defaults.h (DWARF2_ADDR_SIZE): Round up.
(POINTER_SIZE_UNITS): New, rounded up value.
* dwarf2asm.c (size_of_encoded_value): Use it.
(dw2_output_indirect_constant_1): Likewise.
* expmed.c (init_expmed_one_conv): We now know the sizes of
partial int modes.
* loop-iv.c (iv_number_of_iterations): Use precision, not size.
* optabs.c (expand_float): Use precision, not size.
(expand_fix): Likewise.
* simplify-rtx (simplify_unary_operation_1): Likewise.
* tree-dfa.c (get_ref_base_and_extent): Likewise.
* varasm.c (assemble_addr_to_section): Round up pointer sizes.
(default_assemble_integer) Likewise.
(dump_tm_clone_pairs): Likewise.
* dwarf2out.c (mem_loc_descriptor): Allow partial-int modes also.
* var-tracking.c (adjust_mems): Allow partial-int modes also.
(prepare_call_arguments): Likewise.
* stor-layout.c (finalize_type_size): Preserve precision.
(layout_type): Use precision, not size.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@214748 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 13 insertions, 7 deletions

diff --git a/gcc/expmed.c b/gcc/expmed.c
index 7b71616a2fa..1eb712e84ba 100644
--- a/gcc/expmed.c
+++ b/gcc/expmed.c
@@ -118,13 +118,19 @@ init_expmed_one_conv (struct init_expmed_rtl *all, enum machine_mode to_mode,
   int to_size, from_size;
   rtx which;
 
-  /* We're given no information about the true size of a partial integer,
-     only the size of the "full" integer it requires for storage.  For
-     comparison purposes here, reduce the bit size by one in that case.  */
-  to_size = (GET_MODE_BITSIZE (to_mode)
-	     - (GET_MODE_CLASS (to_mode) == MODE_PARTIAL_INT));
-  from_size = (GET_MODE_BITSIZE (from_mode)
-	       - (GET_MODE_CLASS (from_mode) == MODE_PARTIAL_INT));
+  to_size = GET_MODE_PRECISION (to_mode);
+  from_size = GET_MODE_PRECISION (from_mode);
+
+  /* Most partial integers have a precision less than the "full"
+     integer it requires for storage.  In case one doesn't, for
+     comparison purposes here, reduce the bit size by one in that
+     case.  */
+  if (GET_MODE_CLASS (to_mode) == MODE_PARTIAL_INT
+      && exact_log2 (to_size) != -1)
+    to_size --;
+  if (GET_MODE_CLASS (from_mode) == MODE_PARTIAL_INT
+      && exact_log2 (from_size) != -1)
+    from_size --;
   
   /* Assume cost of zero-extend and sign-extend is the same.  */
   which = (to_size < from_size ? all->trunc : all->zext);