This fixes the following avr failures:
FAIL: gcc.dg/Wdouble-promotion.c (test for warnings, line 45)
FAIL: gcc.dg/Wdouble-promotion.c (test for warnings, line 52)
FAIL: gcc.dg/Wdouble-promotion.c (test for warnings, line 53)
FAIL: gcc.dg/Wdouble-promotion.c (test for warnings, line 56)
FAIL: gcc.dg/pr44214-2.c scan-tree-dump-times original " \\* " 1
bootstrapped/regtested on i686-pc-linux-gnu
OK to apply?
2013-05-14 Joern Rennecke <joern.renne...@embecosm.com>
* c-typeck.c (c_common_type): Prefer double_type_node over
other REAL_TYPE types with the same precision.
(convert_arguments): Likewise.
Index: c/c-typeck.c
===================================================================
--- c/c-typeck.c (revision 201992)
+++ c/c-typeck.c (working copy)
@@ -919,6 +919,13 @@ c_common_type (tree t1, tree t2)
|| TYPE_MAIN_VARIANT (t2) == long_double_type_node)
return long_double_type_node;
+ /* Likewise, prefer double to float even if same size.
+ We got a couple of embedded targets with 32 bit doubles, and the
+ pdp11 might have 64 bit floats. */
+ if (TYPE_MAIN_VARIANT (t1) == double_type_node
+ || TYPE_MAIN_VARIANT (t2) == double_type_node)
+ return double_type_node;
+
/* Otherwise prefer the unsigned one. */
if (TYPE_UNSIGNED (t1))
@@ -3156,7 +3163,9 @@ convert_arguments (tree typelist, vec<tr
}
else if (TREE_CODE (valtype) == REAL_TYPE
&& (TYPE_PRECISION (valtype)
- < TYPE_PRECISION (double_type_node))
+ <= TYPE_PRECISION (double_type_node))
+ && valtype != double_type_node
+ && valtype != long_double_type_node
&& !DECIMAL_FLOAT_MODE_P (TYPE_MODE (valtype)))
{
if (type_generic)
