From 57f6bb944b37240d55becfc2dd79c034e9ef16ae Mon Sep 17 00:00:00 2001 From: bernds Date: Wed, 7 Feb 2001 10:24:22 +0000 Subject: [PATCH] Avoid scheduling builtin setjmp receivers git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@39515 138bc75d-0d04-0410-961f-82ee72b054a4 --- gcc/ChangeLog | 5 +++++ gcc/builtins.c | 7 +++++++ 2 files changed, 12 insertions(+) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 09a3a714645..baa60ba6778 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2001-02-07 Bernd Schmidt + + * builtins.c (expand_builtin_setjmp_receiver): Emit an ASM_INPUT as + a scheduling barrier at the end. + 2001-02-07 Alexandre Oliva * config/sh/sh.md (reload_outsf): Removed. diff --git a/gcc/builtins.c b/gcc/builtins.c index 1a6d87f77d4..3dedc5b336a 100644 --- a/gcc/builtins.c +++ b/gcc/builtins.c @@ -581,6 +581,13 @@ expand_builtin_setjmp_receiver (receiver_label) else #endif { /* Nothing */ } + + /* @@@ This is a kludge. Not all machine descriptions define a blockage + insn, but we must not allow the code we just generated to be reordered + by scheduling. Specifically, the update of the frame pointer must + happen immediately, not later. So emit an ASM_INPUT to act as blockage + insn. */ + emit_insn (gen_rtx_ASM_INPUT (VOIDmode, "")); } /* __builtin_setjmp is passed a pointer to an array of five words (not -- 2.11.4.GIT