gcc/ChangeLog:
2020-06-30 Ilya Leoshkevich <i...@linux.ibm.com>
* asan.c (asan_emit_stack_protection): Use CODE_LABEL_BOUNDARY.
* defaults.h (CODE_LABEL_BOUNDARY): New macro.
* doc/tm.texi: Document CODE_LABEL_BOUNDARY.
* doc/tm.texi.in: Likewise.
---
gcc/asan.c | 1 +
gcc/defaults.h | 5 +++++
gcc/doc/tm.texi | 4 ++++
gcc/doc/tm.texi.in | 4 ++++
4 files changed, 14 insertions(+)
diff --git a/gcc/asan.c b/gcc/asan.c
index 9c9aa4cae35..cc06afb9ddc 100644
--- a/gcc/asan.c
+++ b/gcc/asan.c
@@ -1524,6 +1524,7 @@ asan_emit_stack_protection (rtx base, rtx pbase, unsigned
int alignb,
DECL_INITIAL (decl) = decl;
TREE_ASM_WRITTEN (decl) = 1;
TREE_ASM_WRITTEN (id) = 1;
+ SET_DECL_ALIGN (decl, CODE_LABEL_BOUNDARY);
emit_move_insn (mem, expand_normal (build_fold_addr_expr (decl)));
shadow_base = expand_binop (Pmode, lshr_optab, base,
gen_int_shift_amount (Pmode, ASAN_SHADOW_SHIFT),
diff --git a/gcc/defaults.h b/gcc/defaults.h
index f1a38626624..e5a9139bbbe 100644
--- a/gcc/defaults.h
+++ b/gcc/defaults.h
@@ -1473,4 +1473,9 @@ see the files COPYING3 and COPYING.RUNTIME respectively.
If not, see
typedef TARGET_UNIT target_unit;
#endif
+/* Alignment required for a code label, in bits. */
+#ifndef CODE_LABEL_BOUNDARY
+#define CODE_LABEL_BOUNDARY BITS_PER_UNIT
+#endif
+
#endif /* ! GCC_DEFAULTS_H */
diff --git a/gcc/doc/tm.texi b/gcc/doc/tm.texi
index 6e7d9dc54a9..16e48ce59d8 100644
--- a/gcc/doc/tm.texi
+++ b/gcc/doc/tm.texi
@@ -1011,6 +1011,10 @@ to a value equal to or larger than @code{STACK_BOUNDARY}.
Alignment required for a function entry point, in bits.
@end defmac
+@defmac CODE_LABEL_BOUNDARY
+Alignment required for a code label, in bits.
+@end defmac
+
@defmac BIGGEST_ALIGNMENT
Biggest alignment that any data type can require on this machine, in
bits. Note that this is not the biggest alignment that is supported,
diff --git a/gcc/doc/tm.texi.in b/gcc/doc/tm.texi.in
index 3be984bbd5c..12f8c05f5dd 100644
--- a/gcc/doc/tm.texi.in
+++ b/gcc/doc/tm.texi.in
@@ -965,6 +965,10 @@ to a value equal to or larger than @code{STACK_BOUNDARY}.
Alignment required for a function entry point, in bits.
@end defmac
+@defmac CODE_LABEL_BOUNDARY
+Alignment required for a code label, in bits.
+@end defmac
+
@defmac BIGGEST_ALIGNMENT
Biggest alignment that any data type can require on this machine, in
bits. Note that this is not the biggest alignment that is supported,
--
2.25.4
