From bc5612ed5640eb8e98e9f50061db7d2325113eef Mon Sep 17 00:00:00 2001
From: Bernd Schmidt <bernds@codesourcery.com>
Date: Thu, 7 Jul 2011 23:42:41 +0000
Subject: dwarf2out: Move insn scanning out of final.c.

This patch is essentially Bernd's 005-scanfirst patch, updated for
the introduction of the dwarf2cfi.c file.

We introduce NOTE_INSN_CFI and NOTE_INSN_CFI_LABEL to hold the dwarf2
info during the bulk of final.  The actual construction of these notes
still happens during final, right at the very beginning of the pass,
via the dwarf2out_frame_debug_init hook.

        * dwarf2cfi.c (cfi_insn): New.
        (dwarf2out_cfi_label): Don't emit cfi label here.
        (add_fde_cfi): Create a NOTE_INSN_CFI.
        (dwarf2out_frame_debug): Setup cfi_insn.
        (dwarf2out_frame_debug_init): Loop over insns creating CFI notes.
        (dwarf2out_cfi_begin_epilogue): Make static.
        (dwarf2out_frame_debug_restore_state): Make static.
        * dwarf2out.c (output_cfi_directive): Make static.
        (dwarf2out_emit_cfi): New.
        * dwarf2out.h: Update.
        * final.c (final): Remove CFI notes.
        (final_scan_insn): Don't call dwarf2out_cfi_begin_epilogue,
        dwarf2out_frame_debug_restore_state, dwarf2out_frame_debug.
        Handle NOTE_INSN_CFI and NOTE_INSN_CFI_LABEL.
        * insn-notes.def (NOTE_INSN_CFI): New.
        (NOTE_INSN_CFI_LABEL): New.
        * rtl.h (union rtunion_def): Add rt_cfi member.
        (XCFI, XCCFI, NOTE_CFI, NOTE_LABEL_NUMBER): New.

Co-Authored-By: Richard Henderson <rth@redhat.com>

From-SVN: r176016
---
 gcc/insn-notes.def | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'gcc/insn-notes.def')

diff --git a/gcc/insn-notes.def b/gcc/insn-notes.def
index 6cdbabd..859cdac 100644
--- a/gcc/insn-notes.def
+++ b/gcc/insn-notes.def
@@ -77,4 +77,12 @@ INSN_NOTE (SWITCH_TEXT_SECTIONS)
    when an epilogue appears in the middle of a function.  */
 INSN_NOTE (CFA_RESTORE_STATE)
 
+/* When emitting dwarf2 frame information, contains a directive that
+   should be emitted.  */
+INSN_NOTE (CFI)
+
+/* When emitting dwarf2 frame information, contains the number of a debug
+   label that should be emitted.  */
+INSN_NOTE (CFI_LABEL)
+
 #undef INSN_NOTE
-- 
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