From aa02fa1963ef7df326187a587503acd2e295281b Mon Sep 17 00:00:00 2001
From: bernds <bernds@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Fri, 15 Sep 2006 12:35:43 +0000
Subject: [PATCH] * cfgrtl.c (emit_insn_at_entry): New function. *
rtl.h (emit_insn_at_entry): Declare it. * integrate.c
(emit_initial_value_sets): Use it.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@116968 138bc75d-0d04-0410-961f-82ee72b054a4
---
gcc/ChangeLog | 4 ++++
gcc/cfgrtl.c | 14 ++++++++++++++
gcc/integrate.c | 2 +-
gcc/rtl.h | 1 +
4 files changed, 20 insertions(+), 1 deletion(-)
diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index d6f892c6ea6e..b69961aa18bb 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -5,6 +5,10 @@
expanding the number of iterations.
* config/bfin/bfin.c (bfin_rtx_costs): Handle UDIV, UMOD.
+ * cfgrtl.c (emit_insn_at_entry): New function.
+ * rtl.h (emit_insn_at_entry): Declare it.
+ * integrate.c (emit_initial_value_sets): Use it.
+
2006-09-15 Kazu Hirata <kazu@codesourcery.com>
* doc/tm.texi (TARGET_FUNCTION_VALUE): Put @deftypefn all in
diff --git a/gcc/cfgrtl.c b/gcc/cfgrtl.c
index b07bb9467eb1..df281cb2d89b 100644
--- a/gcc/cfgrtl.c
+++ b/gcc/cfgrtl.c
@@ -453,6 +453,20 @@ entry_of_function (void)
BB_HEAD (ENTRY_BLOCK_PTR->next_bb) : get_insns ());
}
+/* Emit INSN at the entry point of the function, ensuring that it is only
+ executed once per function. */
+void
+emit_insn_at_entry (rtx insn)
+{
+ edge_iterator ei = ei_start (ENTRY_BLOCK_PTR->succs);
+ edge e = ei_safe_edge (ei);
+ if (!(e->flags & EDGE_FALLTHRU))
+ abort ();
+
+ insert_insn_on_edge (insn, e);
+ commit_edge_insertions ();
+}
+
/* Update insns block within BB. */
void
diff --git a/gcc/integrate.c b/gcc/integrate.c
index 98769354ddff..a6eeede39859 100644
--- a/gcc/integrate.c
+++ b/gcc/integrate.c
@@ -294,7 +294,7 @@ emit_initial_value_sets (void)
seq = get_insns ();
end_sequence ();
- emit_insn_after (seq, entry_of_function ());
+ emit_insn_at_entry (seq);
return 0;
}
diff --git a/gcc/rtl.h b/gcc/rtl.h
index 75a89b63df10..f8d97a18aad8 100644
--- a/gcc/rtl.h
+++ b/gcc/rtl.h
@@ -2074,6 +2074,7 @@ extern rtx emit (rtx);
extern void renumber_insns (void);
extern rtx delete_insn (rtx);
extern rtx entry_of_function (void);
+extern void emit_insn_at_entry (rtx);
extern void delete_insn_chain (rtx, rtx);
extern rtx unlink_insn_chain (rtx, rtx);
extern rtx delete_insn_and_edges (rtx);
--
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