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Zhixiong Chi
b475bfa446
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: 7edf5725631e69c22627e41ecf5de3222f1d624b) Signed-off-by: Zhixiong Chi <zhixiong.chi@windriver.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org> Signed-off-by: Armin Kuster <akuster808@gmail.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
95 lines
2.7 KiB
Diff
95 lines
2.7 KiB
Diff
From beb921e1106b5bcbb0c6e2be84b241327e2ffc51 Mon Sep 17 00:00:00 2001
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From: law <law@138bc75d-0d04-0410-961f-82ee72b054a4>
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Date: Mon, 25 Mar 2019 21:19:09 +0000
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Subject: [PATCH] PR debug/86964 * dwarf2out.c
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(premark_used_variables): New function. (prune_unused_types_walk): Do
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not mark not premarked external variables. (prune_unused_types):
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Call premark_used_variables.
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* gcc.dg/debug/dwarf2/pr86964.c: New testcase.
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git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@269925 138bc75d-0d04-0410-961f-82ee72b054a4
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Upstream-Status: Backport
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Signed-off-by: Zhixiong Chi <zhixiong.chi@windriver.com>
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---
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gcc/ChangeLog | 8 ++++++
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gcc/dwarf2out.c | 32 +++++++++++++++++++++
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2 files changed, 40 insertions(+)
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diff --git a/gcc/ChangeLog b/gcc/ChangeLog
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index 2075480ca2b..cdce539ac6f 100644
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--- a/gcc/ChangeLog
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+++ b/gcc/ChangeLog
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@@ -1,3 +1,11 @@
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+2019-03-25 Johan Karlsson <johan.karlsson@enea.com>
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+
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+ PR debug/86964
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+ * dwarf2out.c (premark_used_variables): New function.
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+ (prune_unused_types_walk): Do not mark not premarked external
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+ variables.
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+ (prune_unused_types): Call premark_used_variables.
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+
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2019-02-22 Release Manager
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* GCC 8.3.0 released.
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diff --git a/gcc/dwarf2out.c b/gcc/dwarf2out.c
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index ae8bdee9981..b9a624e1ac7 100644
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--- a/gcc/dwarf2out.c
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+++ b/gcc/dwarf2out.c
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@@ -22658,6 +22658,21 @@ premark_types_used_by_global_vars (void)
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->traverse<void *, premark_types_used_by_global_vars_helper> (NULL);
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}
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+/* Mark all variables used by the symtab as perennial. */
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+
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+static void
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+premark_used_variables (void)
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+{
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+ /* Mark DIEs in the symtab as used. */
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+ varpool_node *var;
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+ FOR_EACH_VARIABLE (var)
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+ {
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+ dw_die_ref die = lookup_decl_die (var->decl);
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+ if (die)
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+ die->die_perennial_p = 1;
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+ }
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+}
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+
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/* Generate a DW_TAG_call_site DIE in function DECL under SUBR_DIE
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for CA_LOC call arg loc node. */
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@@ -29264,6 +29279,19 @@ prune_unused_types_walk (dw_die_ref die)
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return;
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+ case DW_TAG_variable:
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+ if (flag_debug_only_used_symbols)
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+ {
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+ if (die->die_perennial_p)
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+ break;
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+
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+ /* premark_used_variables marks external variables --- don't mark
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+ them here. */
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+ if (get_AT (die, DW_AT_external))
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+ return;
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+ }
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+ /* FALLTHROUGH */
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+
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default:
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/* Mark everything else. */
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break;
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@@ -29390,6 +29418,10 @@ prune_unused_types (void)
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/* Mark types that are used in global variables. */
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premark_types_used_by_global_vars ();
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+ /* Mark variables used in the symtab. */
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+ if (flag_debug_only_used_symbols)
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+ premark_used_variables ();
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+
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/* Set the mark on nodes that are actually used. */
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prune_unused_types_walk (comp_unit_die ());
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for (node = limbo_die_list; node; node = node->next)
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--
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2.21.0
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