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* [gcc r13-4353] i386: Fix up ix86_abi handling [PR106875]
@ 2022-11-28 9:15 Jakub Jelinek
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From: Jakub Jelinek @ 2022-11-28 9:15 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:ee629d242d9f93a38e49bed904bb334bbe15dde1
commit r13-4353-gee629d242d9f93a38e49bed904bb334bbe15dde1
Author: Jakub Jelinek <jakub@redhat.com>
Date: Mon Nov 28 10:13:43 2022 +0100
i386: Fix up ix86_abi handling [PR106875]
The following testcase fails since my changes to make also
opts_set saved/restored upon function target/optimization changes
(before it has been acting as "has this option be ever explicit
anywhere?").
The problem is that for ix86_abi we depend on the opts_set
value for it in ix86_option_override_internal:
SET_OPTION_IF_UNSET (opts, opts_set, ix86_abi, DEFAULT_ABI);
but as it is a TargetSave, the backend code is required to
save/restore it manually (it does that) and since gcc 11 also
to save/restore the opts_set bit for it (which isn't done).
We don't do that for various other TargetSave which
ix86_function_specific_{save,restore} saves/restores, but as long
as we never test opts_set for it, it doesn't really matter.
One possible fix would be to introduce some new TargetSave into
which ix86_function_specific_{save,restore} would save/restore a bitmask
of the opts_set bits. The following patch uses an easier fix, by
making it a TargetVariable instead the saving/restoring is handled
by the generated code.
The differences in options.h are just slight movements on where
*ix86_abi stuff appears in it, ditto for options.cc, the real
differences are just in options-save.cc, where cl_target_option_save
gets:
+ ptr->x_ix86_abi = opts->x_ix86_abi;
...
+ if (opts_set->x_ix86_abi) mask |= HOST_WIDE_INT_1U << 3;
(plus adjustments of following TargetVariables mask related stuff),
cl_target_option_restore gets:
+ opts->x_ix86_abi = ptr->x_ix86_abi;
...
+ opts_set->x_ix86_abi = static_cast<enum calling_abi>((mask & 1) != 0);
+ mask >>= 1;
plus the movements in other functions too. So, by it being a
TargetVariable, the only thing that changed is that we don't need to
handle it manually in ix86_function_specific_{save,restore} because it
is handled automatically including the opts_set stuff.
2022-11-28 Jakub Jelinek <jakub@redhat.com>
PR target/106875
* config/i386/i386.opt (x_ix86_abi): Remove TargetSave.
(ix86_abi): Replace it with TargetVariable.
* config/i386/i386-options.cc (ix86_function_specific_save,
ix86_function_specific_restore): Don't save and restore x_ix86_abi.
* g++.target/i386/pr106875.C: New test.
Diff:
---
gcc/config/i386/i386-options.cc | 2 --
gcc/config/i386/i386.opt | 4 ++--
gcc/testsuite/g++.target/i386/pr106875.C | 5 +++++
3 files changed, 7 insertions(+), 4 deletions(-)
diff --git a/gcc/config/i386/i386-options.cc b/gcc/config/i386/i386-options.cc
index bc1d36e36a8..44dcccb0a73 100644
--- a/gcc/config/i386/i386-options.cc
+++ b/gcc/config/i386/i386-options.cc
@@ -687,7 +687,6 @@ ix86_function_specific_save (struct cl_target_option *ptr,
ptr->x_recip_mask_explicit = opts->x_recip_mask_explicit;
ptr->x_ix86_arch_string = opts->x_ix86_arch_string;
ptr->x_ix86_tune_string = opts->x_ix86_tune_string;
- ptr->x_ix86_abi = opts->x_ix86_abi;
ptr->x_ix86_asm_dialect = opts->x_ix86_asm_dialect;
ptr->x_ix86_branch_cost = opts->x_ix86_branch_cost;
ptr->x_ix86_dump_tunes = opts->x_ix86_dump_tunes;
@@ -823,7 +822,6 @@ ix86_function_specific_restore (struct gcc_options *opts,
opts->x_recip_mask_explicit = ptr->x_recip_mask_explicit;
opts->x_ix86_arch_string = ptr->x_ix86_arch_string;
opts->x_ix86_tune_string = ptr->x_ix86_tune_string;
- opts->x_ix86_abi = ptr->x_ix86_abi;
opts->x_ix86_asm_dialect = ptr->x_ix86_asm_dialect;
opts->x_ix86_branch_cost = ptr->x_ix86_branch_cost;
opts->x_ix86_dump_tunes = ptr->x_ix86_dump_tunes;
diff --git a/gcc/config/i386/i386.opt b/gcc/config/i386/i386.opt
index d6b80efa04d..aa8574e6b71 100644
--- a/gcc/config/i386/i386.opt
+++ b/gcc/config/i386/i386.opt
@@ -109,8 +109,8 @@ TargetVariable
enum cmodel ix86_cmodel = CM_32
;; -mabi=
-TargetSave
-enum calling_abi x_ix86_abi
+TargetVariable
+enum calling_abi ix86_abi = SYSV_ABI
;; -masm=
TargetSave
diff --git a/gcc/testsuite/g++.target/i386/pr106875.C b/gcc/testsuite/g++.target/i386/pr106875.C
new file mode 100644
index 00000000000..eeab510761c
--- /dev/null
+++ b/gcc/testsuite/g++.target/i386/pr106875.C
@@ -0,0 +1,5 @@
+// PR target/106875
+// { dg-do compile { target { c++11 && lp64 } } }
+// { dg-options "-O0 -mabi=ms -fabi-version=3 -mcall-ms2sysv-xlogues" }
+
+#include "pr101180.C"
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