diff options
| author | Jozef Lawrynowicz <jozef.l@mittosystems.com> | 2020-11-23 12:06:39 +0000 |
|---|---|---|
| committer | Jozef Lawrynowicz <jozef.l@mittosystems.com> | 2020-11-23 12:15:51 +0000 |
| commit | 762ca20364a590be2cb9c79c0101ccbff74b5de1 (patch) | |
| tree | b865ba9ae2ac517d369987c8329cd9623cb31478 /gcc/gimplify.c | |
| parent | fb8309d4abdcd4c8de07bd4c42e22d1e80471765 (diff) | |
| download | gcc-762ca20364a590be2cb9c79c0101ccbff74b5de1.zip gcc-762ca20364a590be2cb9c79c0101ccbff74b5de1.tar.gz gcc-762ca20364a590be2cb9c79c0101ccbff74b5de1.tar.bz2 | |
Implement the "persistent" attribute
The "persistent" attribute is used for variables that are initialized
by the program loader, but are not initialized by the runtime startup
code. "persistent" variables are placed in a non-volatile area of
memory, which allows their value to "persist" between processor resets.
gcc/c-family/ChangeLog:
* c-attribs.c (handle_special_var_sec_attribute): New.
(handle_noinit_attribute): Remove.
(attr_noinit_exclusions): Rename to...
(attr_section_exclusions): ...this, and add "persistent" attribute
exclusion.
(c_common_attribute_table): Add "persistent" attribute.
gcc/ChangeLog:
* doc/extend.texi (Common Variable Attributes): Document the
"persistent" variable attribute.
* doc/sourcebuild.texi (Effective-Target Keywords): Document
the "persistent" effective target keyword.
* tree.h (DECL_PERSISTENT_P): Define.
* varasm.c (bss_initializer_p): Return false for a
DECL_PERSISTENT_P decl initialized to zero.
(default_section_type_flags): Handle the ".persistent" section.
(default_elf_select_section): Likewise.
(default_unique_section): Likewise.
gcc/testsuite/ChangeLog:
* gcc.c-torture/execute/noinit-attribute.c: Moved to...
* c-c++-common/torture/attr-noinit-main.inc: ...here.
* lib/target-supports.exp (check_effective_target_persistent): New.
* c-c++-common/torture/attr-noinit-1.c: New test.
* c-c++-common/torture/attr-noinit-2.c: New test.
* c-c++-common/torture/attr-noinit-3.c: New test.
* c-c++-common/torture/attr-noinit-invalid.c: New test.
* c-c++-common/torture/attr-persistent-1.c: New test.
* c-c++-common/torture/attr-persistent-2.c: New test.
* c-c++-common/torture/attr-persistent-3.c: New test.
* c-c++-common/torture/attr-persistent-invalid.c: New test.
* c-c++-common/torture/attr-persistent-main.inc: New test.
Diffstat (limited to 'gcc/gimplify.c')
0 files changed, 0 insertions, 0 deletions