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| author | Richard Kenner <kenner@gcc.gnu.org> | 1994-04-18 16:37:01 -0400 |
|---|---|---|
| committer | Richard Kenner <kenner@gcc.gnu.org> | 1994-04-18 16:37:01 -0400 |
| commit | 013680785116b52c4061c45c7b17cbb7d04d9d35 (patch) | |
| tree | 7c19049354fff3f4f5649333c4c76cd88a5b05b7 | |
| parent | 5f61007448569bb7dcca95979ac5fce82cb405d7 (diff) | |
| download | gcc-013680785116b52c4061c45c7b17cbb7d04d9d35.zip gcc-013680785116b52c4061c45c7b17cbb7d04d9d35.tar.gz gcc-013680785116b52c4061c45c7b17cbb7d04d9d35.tar.bz2 | |
(prepare_call_address): New arg REG_PARM_SEEN.
All callers changed.
(expand_call): Pre-load args if small reg classes and reg parms.
From-SVN: r7073
| -rw-r--r-- | gcc/calls.c | 28 |
1 files changed, 22 insertions, 6 deletions
diff --git a/gcc/calls.c b/gcc/calls.c index 06b2387..1eed04b 100644 --- a/gcc/calls.c +++ b/gcc/calls.c @@ -242,10 +242,11 @@ calls_function_1 (exp, which) register should be added, if required. */ rtx -prepare_call_address (funexp, fndecl, use_insns) +prepare_call_address (funexp, fndecl, use_insns, reg_parm_seen) rtx funexp; tree fndecl; rtx *use_insns; + int reg_parm_seen; { rtx static_chain_value = 0; @@ -258,7 +259,14 @@ prepare_call_address (funexp, fndecl, use_insns) /* Make a valid memory address and copy constants thru pseudo-regs, but not for a constant address if -fno-function-cse. */ if (GET_CODE (funexp) != SYMBOL_REF) - funexp = memory_address (FUNCTION_MODE, funexp); + funexp = +#ifdef SMALL_REGISTER_CLASSES + /* If we are using registers for parameters, force the + function address into a register now. */ + reg_parm_seen ? force_not_mem (memory_address (FUNCTION_MODE, funexp)) + : +#endif + memory_address (FUNCTION_MODE, funexp); else { #ifndef NO_FUNCTION_CSE @@ -1577,14 +1585,22 @@ expand_call (exp, target, ignore) /* If the value is expensive, and we are inside an appropriately short loop, put the value into a pseudo and then put the pseudo - into the hard reg. */ + into the hard reg. + + For small register classes, also do this if this call uses + register parameters. This is to avoid reload conflicts while + loading the parameters registers. */ if ((! (GET_CODE (args[i].value) == REG || (GET_CODE (args[i].value) == SUBREG && GET_CODE (SUBREG_REG (args[i].value)) == REG))) && args[i].mode != BLKmode && rtx_cost (args[i].value, SET) > 2 +#ifdef SMALL_REGISTER_CLASSES + && (reg_parm_seen || preserve_subexpressions_p ())) +#else && preserve_subexpressions_p ()) +#endif args[i].value = copy_to_mode_reg (args[i].mode, args[i].value); } @@ -1766,7 +1782,7 @@ expand_call (exp, target, ignore) } } - funexp = prepare_call_address (funexp, fndecl, &use_insns); + funexp = prepare_call_address (funexp, fndecl, &use_insns, reg_parm_seen); /* Now do the register loads required for any wholly-register parms or any parms which are passed both on the stack and in a register. Their @@ -2310,7 +2326,7 @@ emit_library_call VPROTO((rtx orgfun, int no_queue, enum machine_mode outmode, argnum = 0; #endif - fun = prepare_call_address (fun, NULL_TREE, &use_insns); + fun = prepare_call_address (fun, NULL_TREE, &use_insns, 0); /* Now load any reg parms into their regs. */ @@ -2661,7 +2677,7 @@ emit_library_call_value VPROTO((rtx orgfun, rtx value, int no_queue, argnum = 0; #endif - fun = prepare_call_address (fun, NULL_TREE, &use_insns); + fun = prepare_call_address (fun, NULL_TREE, &use_insns, 0); /* Now load any reg parms into their regs. */ |