[OE-core] [PATCH v2] gcc: backport tow patches to fix ICE in dwarf2out_var_location
Peter A. Bigot
pab at pabigot.com
Fri Oct 31 15:39:57 UTC 2014
On 10/31/2014 09:41 AM, jackie.huang at windriver.com wrote:
> From: Jackie Huang <jackie.huang at windriver.com>
>
> The first patch fixes the ICE in dwarf2out_var_location, at
> dwarf2out.c.
>
> r212171:
> * except.c (emit_note_eh_region_end): New helper function.
> (convert_to_eh_region_ranges): Use emit_note_eh_region_end to
> emit EH_REGION_END note.
> * jump.c (cleanup_barriers): Do not split a call and its
> corresponding CALL_ARG_LOCATION note.
>
> But it introduced a regression issue:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63348
>
> so backport the fix for the regression as well:
>
> r215613:
> PR rtl-optimization/63348
> * emit-rtl.c (try_split): Do not emit extra barrier.
Thank you; this level of information makes it much easier to see where
the things came from and avoid carrying a non-standard patch forward
into arbitrary future versions of gcc.
Acked-by: Peter A. Bigot <pab at pabigot.com>
Peter
>
> Signed-off-by: Jackie Huang <jackie.huang at windriver.com>
> ---
> meta/recipes-devtools/gcc/gcc-4.9.inc | 2 +
> .../gcc/gcc-4.9/0058-gcc-r212171.patch | 113 +++++++++++++++++++++
> .../0059-gcc-PR-rtl-optimization-63348.patch | 59 +++++++++++
> 3 files changed, 174 insertions(+)
> create mode 100644 meta/recipes-devtools/gcc/gcc-4.9/0058-gcc-r212171.patch
> create mode 100644 meta/recipes-devtools/gcc/gcc-4.9/0059-gcc-PR-rtl-optimization-63348.patch
>
> diff --git a/meta/recipes-devtools/gcc/gcc-4.9.inc b/meta/recipes-devtools/gcc/gcc-4.9.inc
> index 9a66cd2..8769128 100644
> --- a/meta/recipes-devtools/gcc/gcc-4.9.inc
> +++ b/meta/recipes-devtools/gcc/gcc-4.9.inc
> @@ -71,6 +71,8 @@ SRC_URI = "\
> file://0054-gcc-Makefile.in-fix-parallel-building-failure.patch \
> file://0055-PR-rtl-optimization-61801.patch \
> file://0056-top-level-reorder_gcc-bug-61144.patch \
> + file://0058-gcc-r212171.patch \
> + file://0059-gcc-PR-rtl-optimization-63348.patch \
> "
> SRC_URI[md5sum] = "fddf71348546af523353bd43d34919c1"
> SRC_URI[sha256sum] = "d334781a124ada6f38e63b545e2a3b8c2183049515a1abab6d513f109f1d717e"
> diff --git a/meta/recipes-devtools/gcc/gcc-4.9/0058-gcc-r212171.patch b/meta/recipes-devtools/gcc/gcc-4.9/0058-gcc-r212171.patch
> new file mode 100644
> index 0000000..4b312d4
> --- /dev/null
> +++ b/meta/recipes-devtools/gcc/gcc-4.9/0058-gcc-r212171.patch
> @@ -0,0 +1,113 @@
> +From ca03cf1b133d66eb978c68f6dbc345e9aabcba88 Mon Sep 17 00:00:00 2001
> +From: uros <uros at 138bc75d-0d04-0410-961f-82ee72b054a4>
> +Date: Mon, 30 Jun 2014 19:30:52 +0000
> +Subject: [PATCH] r212171
> +
> +* except.c (emit_note_eh_region_end): New helper
> + function. (convert_to_eh_region_ranges): Use
> + emit_note_eh_region_end to emit EH_REGION_END note.
> + * jump.c (cleanup_barriers): Do not split a call and its
> + corresponding CALL_ARG_LOCATION note.
> +
> +git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@212171 138bc75d-0d04-0410-961f-82ee72b054a4
> +
> +Upstream-status: Backport [https://gcc.gnu.org/viewcvs/gcc?view=revision&revision=212171]
> +Signed-off-by: Baoshan Pang <baoshan.pang at windriver.com>
> +---
> + gcc/except.c | 23 ++++++++++++++++++-----
> + gcc/jump.c | 19 +++++++++++++++----
> + 2 files changed, 33 insertions(+), 9 deletions(-)
> +
> +diff --git a/gcc/except.c b/gcc/except.c
> +index dc5c1d2..7ac114f 100644
> +--- a/gcc/except.c
> ++++ b/gcc/except.c
> +@@ -2466,6 +2466,20 @@ add_call_site (rtx landing_pad, int action, int section)
> + return call_site_base + crtl->eh.call_site_record_v[section]->length () - 1;
> + }
> +
> ++static rtx
> ++emit_note_eh_region_end (rtx insn)
> ++{
> ++ rtx next = NEXT_INSN (insn);
> ++
> ++ /* Make sure we do not split a call and its corresponding
> ++ CALL_ARG_LOCATION note. */
> ++ if (next && NOTE_P (next)
> ++ && NOTE_KIND (next) == NOTE_INSN_CALL_ARG_LOCATION)
> ++ insn = next;
> ++
> ++ return emit_note_after (NOTE_INSN_EH_REGION_END, insn);
> ++}
> ++
> + /* Turn REG_EH_REGION notes back into NOTE_INSN_EH_REGION notes.
> + The new note numbers will not refer to region numbers, but
> + instead to call site entries. */
> +@@ -2544,8 +2558,8 @@ convert_to_eh_region_ranges (void)
> + note = emit_note_before (NOTE_INSN_EH_REGION_BEG,
> + first_no_action_insn_before_switch);
> + NOTE_EH_HANDLER (note) = call_site;
> +- note = emit_note_after (NOTE_INSN_EH_REGION_END,
> +- last_no_action_insn_before_switch);
> ++ note
> ++ = emit_note_eh_region_end (last_no_action_insn_before_switch);
> + NOTE_EH_HANDLER (note) = call_site;
> + gcc_assert (last_action != -3
> + || (last_action_insn
> +@@ -2569,8 +2583,7 @@ convert_to_eh_region_ranges (void)
> + first_no_action_insn = NULL_RTX;
> + }
> +
> +- note = emit_note_after (NOTE_INSN_EH_REGION_END,
> +- last_action_insn);
> ++ note = emit_note_eh_region_end (last_action_insn);
> + NOTE_EH_HANDLER (note) = call_site;
> + }
> +
> +@@ -2617,7 +2630,7 @@ convert_to_eh_region_ranges (void)
> +
> + if (last_action >= -1 && ! first_no_action_insn)
> + {
> +- note = emit_note_after (NOTE_INSN_EH_REGION_END, last_action_insn);
> ++ note = emit_note_eh_region_end (last_action_insn);
> + NOTE_EH_HANDLER (note) = call_site;
> + }
> +
> +diff --git a/gcc/jump.c b/gcc/jump.c
> +index 9418f65..a5e5f52 100644
> +--- a/gcc/jump.c
> ++++ b/gcc/jump.c
> +@@ -121,15 +121,26 @@ rebuild_jump_labels_chain (rtx chain)
> + static unsigned int
> + cleanup_barriers (void)
> + {
> +- rtx insn, next, prev;
> +- for (insn = get_insns (); insn; insn = next)
> ++ rtx insn;
> ++ for (insn = get_insns (); insn; insn = NEXT_INSN (insn))
> + {
> +- next = NEXT_INSN (insn);
> + if (BARRIER_P (insn))
> + {
> +- prev = prev_nonnote_insn (insn);
> ++ rtx prev = prev_nonnote_insn (insn);
> + if (!prev)
> + continue;
> ++
> ++ if (CALL_P (prev))
> ++ {
> ++ /* Make sure we do not split a call and its corresponding
> ++ CALL_ARG_LOCATION note. */
> ++ rtx next = NEXT_INSN (prev);
> ++
> ++ if (NOTE_P (next)
> ++ && NOTE_KIND (next) == NOTE_INSN_CALL_ARG_LOCATION)
> ++ prev = next;
> ++ }
> ++
> + if (BARRIER_P (prev))
> + delete_insn (insn);
> + else if (prev != PREV_INSN (insn))
> +--
> +1.7.9.5
> +
> diff --git a/meta/recipes-devtools/gcc/gcc-4.9/0059-gcc-PR-rtl-optimization-63348.patch b/meta/recipes-devtools/gcc/gcc-4.9/0059-gcc-PR-rtl-optimization-63348.patch
> new file mode 100644
> index 0000000..6d24aa4
> --- /dev/null
> +++ b/meta/recipes-devtools/gcc/gcc-4.9/0059-gcc-PR-rtl-optimization-63348.patch
> @@ -0,0 +1,59 @@
> +From 6eae3e637fcc22d21b51d44d61e3a9cb4825e776 Mon Sep 17 00:00:00 2001
> +From: Jackie Huang <jackie.huang at windriver.com>
> +Date: Thu, 30 Oct 2014 20:37:14 -0700
> +Subject: [PATCH]PR rtl-optimization/63348
> +
> +PR rtl-optimization/63348
> +* emit-rtl.c (try_split): Do not emit extra barrier.
> +
> +Note: this patch is to fix the side effect introduced by r212171 which was reported at:
> +https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63348
> +
> +git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@215613 138bc75d-0d04-0410-961f-82ee72b054a4
> +
> +Upstream-status: Backport [https://gcc.gnu.org/viewcvs/gcc?view=revision&revision=215613]
> +Signed-off-by: Baoshan Pang <baoshan.pang at windriver.com>
> +Signed-off-by: Jackie Huang <jackie.huang at windriver.com>
> +---
> + gcc/emit-rtl.c | 11 -----------
> + 1 files changed, 0 insertions(+), 11 deletions(-)
> +
> +diff --git a/gcc/emit-rtl.c b/gcc/emit-rtl.c
> +index 4736f8d..ae69dbd 100644
> +--- a/gcc/emit-rtl.c
> ++++ b/gcc/emit-rtl.c
> +@@ -3422,7 +3422,6 @@ try_split (rtx pat, rtx trial, int last)
> + {
> + rtx before = PREV_INSN (trial);
> + rtx after = NEXT_INSN (trial);
> +- int has_barrier = 0;
> + rtx note, seq, tem;
> + int probability;
> + rtx insn_last, insn;
> +@@ -3441,14 +3440,6 @@ try_split (rtx pat, rtx trial, int last)
> +
> + split_branch_probability = -1;
> +
> +- /* If we are splitting a JUMP_INSN, it might be followed by a BARRIER.
> +- We may need to handle this specially. */
> +- if (after && BARRIER_P (after))
> +- {
> +- has_barrier = 1;
> +- after = NEXT_INSN (after);
> +- }
> +-
> + if (!seq)
> + return trial;
> +
> +@@ -3594,8 +3585,6 @@ try_split (rtx pat, rtx trial, int last)
> + tem = emit_insn_after_setloc (seq, trial, INSN_LOCATION (trial));
> +
> + delete_insn (trial);
> +- if (has_barrier)
> +- emit_barrier_after (tem);
> +
> + /* Recursively call try_split for each new insn created; by the
> + time control returns here that insn will be fully split, so
> +--
> +1.7.1
> +
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