From 016030fea6d929c69ce92ec45b797da303c09ab6 Mon Sep 17 00:00:00 2001
From: Jan Hubicka <jh@suse.cz>
Date: Sat, 24 Feb 2001 03:22:07 +0100
Subject: [PATCH] function.c (epilogue_done): Be ready for first basic block
not containing PROLOGUE_END note.
* function.c (epilogue_done): Be ready for first basic block not
containing PROLOGUE_END note.
(reposition_prologue_and_epilogue_notes): Avoid placing
PROLOGUE_END note between BASIC_BLOCK.
From-SVN: r40020
---
gcc/ChangeLog | 7 +++++++
gcc/function.c | 13 +++++++++++--
2 files changed, 18 insertions(+), 2 deletions(-)
diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 15881bdc9bce..e0359670eb3e 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,10 @@
+Sat Feb 24 03:19:42 CET 2001 Jan Hubicka <jh@suse.cz>
+
+ * function.c (epilogue_done): Be ready for first basic block not
+ containing PROLOGUE_END note.
+ (reposition_prologue_and_epilogue_notes): Avoid placing
+ PROLOGUE_END note between BASIC_BLOCK.
+
Sat Feb 24 03:17:09 CET 2001 Jan Hubicka <jh@suse.cz>
* loop.c (canonicalize_condition): Move to reversed_comparison_code.
diff --git a/gcc/function.c b/gcc/function.c
index 1c3ee315d6ef..a1c2d3389d0e 100644
--- a/gcc/function.c
+++ b/gcc/function.c
@@ -7384,7 +7384,13 @@ epilogue_done:
there are line number notes before where we inserted the
prologue we should move them, and (2) we should generate a
note before the end of the first basic block, if there isn't
- one already there. */
+ one already there.
+
+ ??? This behaviour is completely broken when dealing with
+ multiple entry functions. We simply place the note always
+ into first basic block and let alternate entry points
+ to be missed.
+ */
for (insn = prologue_end; insn; insn = prev)
{
@@ -7402,7 +7408,7 @@ epilogue_done:
/* Find the last line number note in the first block. */
for (insn = BASIC_BLOCK (0)->end;
- insn != prologue_end;
+ insn != prologue_end && insn;
insn = PREV_INSN (insn))
if (GET_CODE (insn) == NOTE && NOTE_LINE_NUMBER (insn) > 0)
break;
@@ -7487,6 +7493,9 @@ reposition_prologue_and_epilogue_notes (f)
BLOCK_HEAD (0) = next;
remove_insn (note);
+ /* Avoid placing note between CODE_LABEL and BASIC_BLOCK note. */
+ if (GET_CODE (insn) == CODE_LABEL)
+ insn = NEXT_INSN (insn);
add_insn_after (note, insn);
}
}
--
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