From 1606e68a803638a3a3de0678de340d60a480cb71 Mon Sep 17 00:00:00 2001 From: uweigand Date: Thu, 9 Jun 2005 11:17:23 +0000 Subject: 2005-06-09 Adrian Straetling * target.h (insn_valid_within_doloop): Rename into "invalid_within_doloop". Change return type to "const char *". Update Comment. * targhooks.h (default_insn_valid_within_doloop): Rename into "default_invalid_within_doloop". * targhooks.c (default_insn_valid_within_doloop): Likewise. Update Comment. * target-def.h (TARGET_INSN_VALID_WITHIN_DOLOOP): Rename target hook into "TARGET_INVALID_WITHIN_DOLOOP". Default it to "default_invalid_within_doloop". * hooks.c (hook_constcharptr_rtx_null): New function. (hook_bool_rtx_true): Remove. * hooks.h (hook_constcharptr_rtx_null): Declare. (hook_bool_rtx_true): Remove. * loop-doloop.c (doloop_valid_p): Temporarily store return value of "invalid_within_doloop" and print error message if non-null. Update Comment. * doc/tm.texi: Update documentation. * config/s390/s390.c: Adjust to new hook name and new default hook. * config/rs6000/rs6000.c: (rs6000_insn_valid_within_doloop): Rename into "rs6000_invalid_within_doloop". (rs6000_invalid_within_doloop): Change return type to "static const char *" and replace return values. Update Comment. git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@100797 138bc75d-0d04-0410-961f-82ee72b054a4 --- gcc/targhooks.c | 26 ++++++++++---------------- 1 file changed, 10 insertions(+), 16 deletions(-) (limited to 'gcc/targhooks.c') diff --git a/gcc/targhooks.c b/gcc/targhooks.c index 42992b78c34..1de5809db13 100644 --- a/gcc/targhooks.c +++ b/gcc/targhooks.c @@ -262,34 +262,28 @@ default_scalar_mode_supported_p (enum machine_mode mode) } } -/* TRUE if INSN insn is valid within a low-overhead loop. +/* NULL if INSN insn is valid within a low-overhead loop, otherwise returns + an error message. This function checks whether a given INSN is valid within a low-overhead - loop. A called function may clobber any special registers required for - low-overhead looping. Additionally, some targets (eg, PPC) use the count + loop. If INSN is invalid it returns the reason for that, otherwise it + returns NULL. A called function may clobber any special registers required + for low-overhead looping. Additionally, some targets (eg, PPC) use the count register for branch on table instructions. We reject the doloop pattern in these cases. */ -bool -default_insn_valid_within_doloop (rtx insn) +const char * +default_invalid_within_doloop (rtx insn) { if (CALL_P (insn)) - { - if (dump_file) - fprintf (dump_file, "Doloop: Function call in loop.\n"); - return false; - } + return "Function call in loop."; if (JUMP_P (insn) && (GET_CODE (PATTERN (insn)) == ADDR_DIFF_VEC || GET_CODE (PATTERN (insn)) == ADDR_VEC)) - { - if (dump_file) - fprintf (dump_file, "Doloop: Computed branch in the loop.\n"); - return false; - } + return "Computed branch in the loop."; - return true; + return NULL; } bool -- cgit v1.2.1