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author | Richard Sandiford <richard.sandiford@arm.com> | 2019-09-30 16:19:38 +0000 |
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committer | Richard Sandiford <rsandifo@gcc.gnu.org> | 2019-09-30 16:19:38 +0000 |
commit | bd785b44932274f7067105de417938597289962c (patch) | |
tree | 503a651572b5e0035d9cb5422d10f45b3e051b5c /gcc/emit-rtl.h | |
parent | 0c88d078eba7f51d2e5fc76a630f7eb369c09c87 (diff) | |
download | gcc-bd785b44932274f7067105de417938597289962c.zip gcc-bd785b44932274f7067105de417938597289962c.tar.gz gcc-bd785b44932274f7067105de417938597289962c.tar.bz2 |
Add function_abi.{h,cc}
This patch adds new structures and functions for handling
multiple ABIs in a translation unit. The structures are:
- predefined_function_abi: describes a static, predefined ABI
- function_abi: describes either a predefined ABI or a local
variant of one (e.g. taking -fipa-ra into account)
The patch adds functions for getting the ABI from a given type
or decl; a later patch will also add a function for getting the
ABI of the target of a call insn.
Although ABIs are about much more than call-clobber/saved choices,
I wanted to keep the name general in case we add more ABI-related
information in future.
2019-09-30 Richard Sandiford <richard.sandiford@arm.com>
gcc/
* Makefile.in (OBJS): Add function-abi.o.
(GTFILES): Add function-abi.h.
* function-abi.cc: New file.
* function-abi.h: Likewise.
* emit-rtl.h (rtl_data::abi): New field.
* function.c: Include function-abi.h.
(prepare_function_start): Initialize crtl->abi.
* read-rtl-function.c: Include regs.h and function-abi.h.
(read_rtl_function_body): Initialize crtl->abi.
(read_rtl_function_body_from_file_range): Likewise.
* reginfo.c: Include function-abi.h.
(init_reg_sets_1): Initialize default_function_abi.
(globalize_reg): Call add_full_reg_clobber for each predefined ABI
when making a register global.
* target-globals.h (this_target_function_abi_info): Declare.
(target_globals::function_abi_info): New field.
(restore_target_globals): Copy it.
* target-globals.c: Include function-abi.h.
(default_target_globals): Initialize the function_abi_info field.
(target_globals): Allocate it.
(save_target_globals): Free it.
From-SVN: r276307
Diffstat (limited to 'gcc/emit-rtl.h')
-rw-r--r-- | gcc/emit-rtl.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/gcc/emit-rtl.h b/gcc/emit-rtl.h index 7643bf9..320aab5 100644 --- a/gcc/emit-rtl.h +++ b/gcc/emit-rtl.h @@ -22,6 +22,7 @@ along with GCC; see the file COPYING3. If not see class temp_slot; typedef class temp_slot *temp_slot_p; +class predefined_function_abi; /* Information mainlined about RTL representation of incoming arguments. */ struct GTY(()) incoming_args { @@ -64,6 +65,14 @@ struct GTY(()) rtl_data { struct function_subsections subsections; struct rtl_eh eh; + /* The ABI of the function, i.e. the interface it presents to its callers. + This is the ABI that should be queried to see which registers the + function needs to save before it uses them. + + Other functions (including those called by this function) might use + different ABIs. */ + const predefined_function_abi *GTY((skip)) abi; + /* For function.c */ /* # of bytes of outgoing arguments. If ACCUMULATE_OUTGOING_ARGS is |