Fix computation of need_mode in choose_reload_regs.

From-SVN: r36264

Fix computation of need_mode in choose_reload_regs.
From-SVN: r36264
ce701d1b · Bernd Schmidt · Bernd Schmidt · 82be40f7 · ce701d1b · ce701d1b
Commit ce701d1b authored Sep 08, 2000 by Bernd Schmidt Committed by Bernd Schmidt Sep 08, 2000
Hide whitespace changes
Inline Side-by-side

Showing with 9 additions and 2 deletions

gcc/ChangeLog
+2 -0

gcc/reload1.c
+7 -2

No files found.
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -2,6 +2,8 @@

 	* combine.c (combine_simplify_rtx): Try to simplify VEC_SELECT of a
 	VEC_CONCAT.
+	From Richard Henderson:
+	* reload1.c (choose_reload_regs): Compute need_mode properly.

 2000-09-07  Richard Henderson  <rth@cygnus.com>


--- a/gcc/reload1.c
+++ b/gcc/reload1.c
@@ -5304,8 +5304,13 @@ choose_reload_regs (chain)
 		  i = REGNO (last_reg) + word;
 		  last_class = REGNO_REG_CLASS (i);

-		  need_mode = smallest_mode_for_size ((word+1) * UNITS_PER_WORD,
-						      GET_MODE_CLASS (mode));
+		  if (word == 0)
+		    need_mode = mode;
+		  else
+		    need_mode
+		      = smallest_mode_for_size (GET_MODE_SIZE (mode)
+						+ word * UNITS_PER_WORD,
+						GET_MODE_CLASS (mode));

 		  if (
 #ifdef CLASS_CANNOT_CHANGE_MODE