mirrors/poky
1
0
Fork 0
mirror of https://git.yoctoproject.org/poky synced 2026-03-17 04:39:40 +01:00
Code Issues Packages Projects Releases Wiki Activity

gcc: reduce the variables in symtab

Browse Source 
Backport the patch from upstream:
https://github.com/gcc-mirror/gcc.git [commit beb921e]
https://gcc.gnu.org/viewcvs/gcc?view=revision&revision=269925

Add the premark_used_variables function, meanwhile do not mark
not premarked external variables in prune_unused_types_walk.

(From OE-Core rev: 5f2119a309096aa8cbae666c37521b0c93da53d0)

Signed-off-by: Zhixiong Chi <zhixiong.chi@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Zhixiong Chi
2019-05-28 00:59:49 -07:00
committed by Richard Purdie
parent 05eb9a6695
commit 5aa3194795
2 changed files with 95 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
meta/recipes-devtools/gcc/gcc-8.3.inc
View File

@@ -72,6 +72,7 @@ SRC_URI = "\
file://0039-riscv-Disable-multilib-for-OE.patch \
file://0040-powerpc-powerpc64-Add-support-for-musl-ldso.patch \
file://0041-Add-a-recursion-limit-to-libiberty-s-demangling-code.patch \
file://0042-PR-debug-86964.patch \
"
SRC_URI[md5sum] = "65b210b4bfe7e060051f799e0f994896"
SRC_URI[sha256sum] = "64baadfe6cc0f4947a84cb12d7f0dfaf45bb58b7e92461639596c21e02d97d2c"

94
meta/recipes-devtools/gcc/gcc-8.3/0042-PR-debug-86964.patch Normal file
View File

@@ -0,0 +1,94 @@
From beb921e1106b5bcbb0c6e2be84b241327e2ffc51 Mon Sep 17 00:00:00 2001
From: law <law@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Mon, 25 Mar 2019 21:19:09 +0000
Subject: [PATCH] PR debug/86964 * dwarf2out.c
(premark_used_variables): New function. (prune_unused_types_walk): Do
not mark not premarked external variables. (prune_unused_types):
Call premark_used_variables.
* gcc.dg/debug/dwarf2/pr86964.c: New testcase.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@269925 138bc75d-0d04-0410-961f-82ee72b054a4
Upstream-Status: Backport
Signed-off-by: Zhixiong Chi <zhixiong.chi@windriver.com>
---
gcc/ChangeLog | 8 ++++++
gcc/dwarf2out.c | 32 +++++++++++++++++++++
2 files changed, 40 insertions(+)
diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 2075480ca2b..cdce539ac6f 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,11 @@
+2019-03-25 Johan Karlsson <johan.karlsson@enea.com>
+
+ PR debug/86964
+ * dwarf2out.c (premark_used_variables): New function.
+ (prune_unused_types_walk): Do not mark not premarked external
+ variables.
+ (prune_unused_types): Call premark_used_variables.
+
2019-02-22 Release Manager
* GCC 8.3.0 released.
diff --git a/gcc/dwarf2out.c b/gcc/dwarf2out.c
index ae8bdee9981..b9a624e1ac7 100644
--- a/gcc/dwarf2out.c
+++ b/gcc/dwarf2out.c
@@ -22658,6 +22658,21 @@ premark_types_used_by_global_vars (void)
->traverse<void *, premark_types_used_by_global_vars_helper> (NULL);
}
+/* Mark all variables used by the symtab as perennial. */
+
+static void
+premark_used_variables (void)
+{
+ /* Mark DIEs in the symtab as used. */
+ varpool_node *var;
+ FOR_EACH_VARIABLE (var)
+ {
+ dw_die_ref die = lookup_decl_die (var->decl);
+ if (die)
+ die->die_perennial_p = 1;
+ }
+}
+
/* Generate a DW_TAG_call_site DIE in function DECL under SUBR_DIE
for CA_LOC call arg loc node. */
@@ -29264,6 +29279,19 @@ prune_unused_types_walk (dw_die_ref die)
return;
+ case DW_TAG_variable:
+ if (flag_debug_only_used_symbols)
+ {
+ if (die->die_perennial_p)
+ break;
+
+ /* premark_used_variables marks external variables --- don't mark
+ them here. */
+ if (get_AT (die, DW_AT_external))
+ return;
+ }
+ /* FALLTHROUGH */
+
default:
/* Mark everything else. */
break;
@@ -29390,6 +29418,10 @@ prune_unused_types (void)
/* Mark types that are used in global variables. */
premark_types_used_by_global_vars ();
+ /* Mark variables used in the symtab. */
+ if (flag_debug_only_used_symbols)
+ premark_used_variables ();
+
/* Set the mark on nodes that are actually used. */
prune_unused_types_walk (comp_unit_die ());
for (node = limbo_die_list; node; node = node->next)
--
2.21.0