This patch fixes the back-end context switching in cases where functions
should be built with their own target contexts instead of the
global one, such as LTO linking and functions with target attributes (TBD).
PR target/113233
gcc/ChangeLog:
* config/loongarch/loongarch.cc (loongarch_reg_init):
Reinitialize the loongarch_regno_mode_ok cache.
(loongarch_option_override): Same.
(loongarch_save_restore_target_globals): Restore target globals.
(loongarch_set_current_function): Restore the target contexts
for functions.
(TARGET_SET_CURRENT_FUNCTION): Define.
* config/loongarch/loongarch.h (SWITCHABLE_TARGET): Enable
switchable target context.
* config/loongarch/loongarch-builtins.cc (loongarch_init_builtins):
Initialize all builtin functions at startup.
(loongarch_expand_builtin): Turn assertion of builtin availability
into a test.
gcc/testsuite/ChangeLog:
* lib/target-supports.exp: Define condition loongarch_sx_as.
* gcc.dg/lto/pr113233_0.c: New test.
---
gcc/config/loongarch/loongarch-builtins.cc | 25 +++---
gcc/config/loongarch/loongarch.cc | 91 --
gcc/config/loongarch/loongarch.h | 2 +
gcc/testsuite/gcc.dg/lto/pr113233_0.c | 14
gcc/testsuite/lib/target-supports.exp | 12 +++
5 files changed, 127 insertions(+), 17 deletions(-)
create mode 100644 gcc/testsuite/gcc.dg/lto/pr113233_0.c
diff --git a/gcc/config/loongarch/loongarch-builtins.cc
b/gcc/config/loongarch/loongarch-builtins.cc
index efe7e5e5ebc..fbe46833c9b 100644
--- a/gcc/config/loongarch/loongarch-builtins.cc
+++ b/gcc/config/loongarch/loongarch-builtins.cc
@@ -2512,14 +2512,11 @@ loongarch_init_builtins (void)
for (i = 0; i < ARRAY_SIZE (loongarch_builtins); i++)
{
d = &loongarch_builtins[i];
- if (d->avail ())
- {
- type = loongarch_build_function_type (d->function_type);
- loongarch_builtin_decls[i]
- = add_builtin_function (d->name, type, i, BUILT_IN_MD, NULL,
- NULL);
- loongarch_get_builtin_decl_index[d->icode] = i;
- }
+ type = loongarch_build_function_type (d->function_type);
+ loongarch_builtin_decls[i]
+ = add_builtin_function (d->name, type, i, BUILT_IN_MD, NULL,
+ NULL);
+ loongarch_get_builtin_decl_index[d->icode] = i;
}
}
@@ -3105,15 +3102,21 @@ loongarch_expand_builtin (tree exp, rtx target, rtx
subtarget ATTRIBUTE_UNUSED,
int ignore ATTRIBUTE_UNUSED)
{
tree fndecl;
- unsigned int fcode, avail;
+ unsigned int fcode;
const struct loongarch_builtin_description *d;
fndecl = TREE_OPERAND (CALL_EXPR_FN (exp), 0);
fcode = DECL_MD_FUNCTION_CODE (fndecl);
gcc_assert (fcode < ARRAY_SIZE (loongarch_builtins));
d = &loongarch_builtins[fcode];
- avail = d->avail ();
- gcc_assert (avail != 0);
+
+ if (!d->avail ())
+{
+ error_at (EXPR_LOCATION (exp),
+ "built-in function %qD is not enabled", fndecl);
+ return target;
+}
+
switch (d->builtin_type)
{
case LARCH_BUILTIN_DIRECT:
diff --git a/gcc/config/loongarch/loongarch.cc
b/gcc/config/loongarch/loongarch.cc
index c90b701a533..6b92e7034c5 100644
--- a/gcc/config/loongarch/loongarch.cc
+++ b/gcc/config/loongarch/loongarch.cc
@@ -7570,15 +7570,19 @@ loongarch_global_init (void)
loongarch_dwarf_regno[i] = INVALID_REGNUM;
}
+ /* Function to allocate machine-dependent function status. */
+ init_machine_status = &loongarch_init_machine_status;
+};
+
+static void
+loongarch_reg_init (void)
+{
/* Set up loongarch_hard_regno_mode_ok. */
for (int mode = 0; mode < MAX_MACHINE_MODE; mode++)
for (int regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++)
loongarch_hard_regno_mode_ok_p[mode][regno]
= loongarch_hard_regno_mode_ok_uncached (regno, (machine_mode) mode);
-
- /* Function to allocate machine-dependent function status. */
- init_machine_status = &loongarch_init_machine_status;
-};
+}
static void
loongarch_option_override_internal (struct loongarch_target *target,
@@ -7605,20 +7609,92 @@ loongarch_option_override_internal (struct
loongarch_target *target,
/* Override some options according to the resolved target. */
loongarch_target_option_override (target, opts, opts_set);
+
+ target_option_default_node = target_option_current_node
+= build_target_option_node (opts, opts_set);
+
+ loongarch_reg_init ();
+}
+
+/* Remember the last target of loongarch_set_current_function. */
+
+static GTY(()) tree loongarch_previous_fndecl;
+
+/* Restore or save the TREE_TARGET_GLOBALS from or to new_tree.
+ Used by loongarch_set_current_function to
+ make sure optab availability predicates are recomputed when necessary. */
+
+static void
+loongarch_save_restore_target_globals (tree new_tree)
+{
+ if (TREE_TARGE
