From e3a771613feb915111421ff10f29937aee88c452 Mon Sep 17 00:00:00 2001 From: Richard Kenner Date: Mon, 21 Mar 1994 17:15:32 -0500 Subject: [PATCH] (preserve_temp_slots): If argument is REG, see if it is address of a temp slot we know about. From-SVN: r6843 --- gcc/function.c | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-) diff --git a/gcc/function.c b/gcc/function.c index a266ead2c25..8726afb2a65 100644 --- a/gcc/function.c +++ b/gcc/function.c @@ -946,9 +946,23 @@ preserve_temp_slots (x) { struct temp_slot *p; + if (x == 0) + return; + + /* If X is a register that is being used as a pointer, see if we have + a temporary slot we know it points to. To be consistent with + the code below, we really should preserve all non-kept slots + if we can't find a match, but that seems to be much too costly. */ + if (GET_CODE (x) == REG && REGNO_POINTER_FLAG (REGNO (x)) + && (p = find_temp_slot_from_address (x)) != 0) + { + p->level--; + return; + } + /* If X is not in memory or is at a constant address, it cannot be in a temporary slot. */ - if (x == 0 || GET_CODE (x) != MEM || CONSTANT_P (XEXP (x, 0))) + if (GET_CODE (x) != MEM || CONSTANT_P (XEXP (x, 0))) return; /* First see if we can find a match. */ -- 2.30.2