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[RA]: Add flag for checking IRA in progress

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RISCV target developers need a flag to prevent creating
insns in IRA which can not be split after RA as they will need a
temporary reg.  The patch introduces such flag.

gcc/ChangeLog:

	* rtl.h (lra_in_progress): Change type to bool.
	(ira_in_progress): Add new extern.
	* ira.cc (ira_in_progress): New global.
	(pass_ira::execute): Set up ira_in_progress.
	* lra.cc: (lra_in_progress): Change type to bool and initialize.
	(lra): Use bool values for lra_in_progress.
	* lra-eliminations.cc (init_elim_table): Ditto.
This commit is contained in:
Vladimir N. Makarov
2023-09-28 09:41:18 -04:00
parent f194c684a2
commit 0c8ecbcd3c
4 changed files with 16 additions and 8 deletions
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5
gcc/ira.cc
View File

@@ -5542,6 +5542,9 @@ bool ira_conflicts_p;
/* Saved between IRA and reload. */
static int saved_flag_ira_share_spill_slots;
/* Set to true while in IRA. */
bool ira_in_progress = false;
/* This is the main entry of IRA. */
static void
ira (FILE *f)
@@ -6110,7 +6113,9 @@ public:
}
unsigned int execute (function *) final override
{
ira_in_progress = true;
ira (dump_file);
ira_in_progress = false;
return 0;
}

4
gcc/lra-eliminations.cc
View File

@@ -1294,14 +1294,14 @@ init_elim_table (void)
will cause, e.g., gen_rtx_REG (Pmode, STACK_POINTER_REGNUM) to
equal stack_pointer_rtx. We depend on this. Threfore we switch
off that we are in LRA temporarily. */
lra_in_progress = 0;
lra_in_progress = false;
for (ep = reg_eliminate; ep < &reg_eliminate[NUM_ELIMINABLE_REGS]; ep++)
{
ep->from_rtx = gen_rtx_REG (Pmode, ep->from);
ep->to_rtx = gen_rtx_REG (Pmode, ep->to);
eliminable_reg_rtx[ep->from] = ep->from_rtx;
}
lra_in_progress = 1;
lra_in_progress = true;
}
/* Function for initialization of elimination once per function. It

8
gcc/lra.cc
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@@ -2262,8 +2262,8 @@ update_inc_notes (void)
}
}
/* Set to 1 while in lra. */
int lra_in_progress;
/* Set to true while in LRA. */
bool lra_in_progress = false;
/* Start of pseudo regnos before the LRA. */
int lra_new_regno_start;
@@ -2360,7 +2360,7 @@ lra (FILE *f)
if (flag_checking)
check_rtl (false);
lra_in_progress = 1;
lra_in_progress = true;
lra_live_range_iter = lra_coalesce_iter = lra_constraint_iter = 0;
lra_assignment_iter = lra_assignment_iter_after_spill = 0;
@@ -2552,7 +2552,7 @@ lra (FILE *f)
ira_restore_scratches (lra_dump_file);
lra_eliminate (true, false);
lra_final_code_change ();
lra_in_progress = 0;
lra_in_progress = false;
if (live_p)
lra_clear_live_ranges ();
lra_live_ranges_finish ();

7
gcc/rtl.h
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@@ -4108,8 +4108,11 @@ extern int epilogue_completed;
extern int reload_in_progress;
/* Set to 1 while in lra. */
extern int lra_in_progress;
/* Set to true while in IRA. */
extern bool ira_in_progress;
/* Set to true while in LRA. */
extern bool lra_in_progress;
/* This macro indicates whether you may create a new
pseudo-register. */