[PATCH 3/5] rs6000: Fix va_start handling for -m32 -mpowerpc64 ABI_V4

[Segher Boessenkool <segher@kernel.crashing.org>]

This fixes 88 testsuite FAILs.

-mpowerpc64 does not change the ABI, but it does change the value of
UNITS_PER_WORD.  This code is for 32-bit only so we can use
MIN_UNITS_PER_WORD instead.

Bootstrapped and tested as usual.  Okay for mainline?


Segher


2015-01-14  Segher Boessenkool  <segher@kernel.crashing.org>

gcc/
	* config/rs6000/rs6000.c (rs6000_va_start): Use MIN_UNITS_PER_WORD
	instead of UNITS_PER_WORD to describe the size of stack slots.

---
 gcc/config/rs6000/rs6000.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c
index ca5ce28..afced72 100644
--- a/gcc/config/rs6000/rs6000.c
+++ b/gcc/config/rs6000/rs6000.c
@@ -11232,7 +11232,7 @@ rs6000_va_start (tree valist, rtx nextarg)
   /* Find the overflow area.  */
   t = make_tree (TREE_TYPE (ovf), virtual_incoming_args_rtx);
   if (words != 0)
-    t = fold_build_pointer_plus_hwi (t, words * UNITS_PER_WORD);
+    t = fold_build_pointer_plus_hwi (t, words * MIN_UNITS_PER_WORD);
   t = build2 (MODIFY_EXPR, TREE_TYPE (ovf), ovf, t);
   TREE_SIDE_EFFECTS (t) = 1;
   expand_expr (t, const0_rtx, VOIDmode, EXPAND_NORMAL);
-- 
1.8.1.4