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| author | Jakub Jelinek <jakub@redhat.com> | 2020-03-04 12:59:04 +0100 |
|---|---|---|
| committer | Jakub Jelinek <jakub@redhat.com> | 2020-03-04 12:59:04 +0100 |
| commit | 64ba6d17022eeb65f56f0b141c2640f9ab938f97 (patch) | |
| tree | 0c1fd44a3b5ba8341466c911d0a924dc07d53a1f /gcc/tree-inline.c | |
| parent | 1cdfb80a4ec7b6585b436917e13b205055732232 (diff) | |
| download | gcc-64ba6d17022eeb65f56f0b141c2640f9ab938f97.zip gcc-64ba6d17022eeb65f56f0b141c2640f9ab938f97.tar.gz gcc-64ba6d17022eeb65f56f0b141c2640f9ab938f97.tar.bz2 | |
inliner: Copy DECL_BY_REFERENCE in copy_decl_to_var [PR93888]
In the following testcase we emit wrong debug info for the karg
parameter in the DW_TAG_inlined_subroutine into main.
The problem is that the karg PARM_DECL is DECL_BY_REFERENCE and thus
in the IL has const K & type, but in the source just const K.
When the function is inlined, we create a VAR_DECL for it, but don't
set DECL_BY_REFERENCE, so when emitting DW_AT_location, we treat it like
a const K & typed variable, but it has DW_AT_abstract_origin which has
just the const K type and thus the debugger thinks the variable has
const K type.
Fixed by copying the DECL_BY_REFERENCE flag. Not doing it in
copy_decl_for_dup_finish, because copy_decl_no_change already copies
that flag through copy_node and in copy_result_decl_to_var it is
undesirable, as we handle DECL_BY_REFERENCE in that case instead
by changing the type.
2020-03-04 Jakub Jelinek <jakub@redhat.com>
PR debug/93888
* tree-inline.c (copy_decl_to_var): Copy DECL_BY_REFERENCE flag.
* g++.dg/guality/pr93888.C: New test.
Diffstat (limited to 'gcc/tree-inline.c')
| -rw-r--r-- | gcc/tree-inline.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/gcc/tree-inline.c b/gcc/tree-inline.c index 23941da..59798ec 100644 --- a/gcc/tree-inline.c +++ b/gcc/tree-inline.c @@ -5929,6 +5929,7 @@ copy_decl_to_var (tree decl, copy_body_data *id) TREE_READONLY (copy) = TREE_READONLY (decl); TREE_THIS_VOLATILE (copy) = TREE_THIS_VOLATILE (decl); DECL_GIMPLE_REG_P (copy) = DECL_GIMPLE_REG_P (decl); + DECL_BY_REFERENCE (copy) = DECL_BY_REFERENCE (decl); return copy_decl_for_dup_finish (id, decl, copy); } |