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sibcall.c (indentify_call_return_value): Find last call in the chain; Allow stack adjustment after function call.

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* sibcall.c (indentify_call_return_value): Find last call in the chain;
        Allow stack adjustment after function call.

From-SVN: r32791
This commit is contained in:
Jan Hubicka
2000-03-28 23:03:37 +02:00
committed by Jeff Law
parent 8ba7768175
commit 1e9d75e87b
2 changed files with 12 additions and 2 deletions
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3
gcc/ChangeLog
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@@ -25,6 +25,9 @@ Tue Mar 28 11:55:48 2000 Richard Kenner <kenner@vlsi1.ultra.nyu.edu>
Tue Mar 28 08:29:46 2000 Jan Hubicka <jh@suse.cz>
* sibcall.c (indentify_call_return_value): Find last call in the chain;
Allow stack adjustment after function call.
* regmove.c (struct csa_memlist): Make mem field rtx *.
(record_one_stack_ref): Accept rtx * instead of rtx as parameter.
(try_apply_stack_adjustment): Replace whole MEM rtx.

11
gcc/sibcall.c
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@@ -53,10 +53,12 @@ identify_call_return_value (cp, p_hard_return, p_soft_return)
{
rtx insn, set, hard, soft;
/* Search forward through the "normal" call sequence to the CALL insn. */
insn = XEXP (cp, 0);
while (GET_CODE (insn) != CALL_INSN)
/* Search backward through the "normal" call sequence to the CALL insn. */
while (NEXT_INSN (insn))
insn = NEXT_INSN (insn);
while (GET_CODE (insn) != CALL_INSN)
insn = PREV_INSN (insn);
/* Assume the pattern is (set (dest) (call ...)), or that the first
member of a parallel is. This is the hard return register used
@@ -75,6 +77,11 @@ identify_call_return_value (cp, p_hard_return, p_soft_return)
if (GET_CODE (hard) != REG)
return 0;
/* Stack adjustment done after call may appear here. */
insn = skip_stack_adjustment (insn);
if (! insn)
return 0;
/* If there's nothing after, there's no soft return value. */
insn = NEXT_INSN (insn);
if (! insn)