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-rw-r--r--gcc/ChangeLog3
-rw-r--r--gcc/regclass.c2
2 files changed, 5 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index c4e17973b08..ba57538fbb6 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,8 @@
2000-05-28 Richard Henderson <rth@cygnus.com>
+ * regclass.c (record_operand_costs): Protect reg_changes_size
+ with CLASS_CANNOT_CHANGE_SIZE.
+
* loop.c (instrument_loop_bct): Set JUMP_LABEL on the new insn.
2000-05-28 Richard Henderson <rth@cygnus.com>
diff --git a/gcc/regclass.c b/gcc/regclass.c
index 6a741a64b4b..3db64a2244d 100644
--- a/gcc/regclass.c
+++ b/gcc/regclass.c
@@ -859,9 +859,11 @@ record_operand_costs (insn, op_costs, reg_pref)
if (GET_CODE (recog_data.operand[i]) == SUBREG)
{
rtx inner = SUBREG_REG (recog_data.operand[i]);
+#ifdef CLASS_CANNOT_CHANGE_SIZE
if (GET_MODE_SIZE (modes[i]) != GET_MODE_SIZE (GET_MODE (inner))
&& GET_CODE (inner) == REG)
SET_REGNO_REG_SET (reg_changes_size, REGNO (inner));
+#endif
recog_data.operand[i] = inner;
}