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rx.h (JUMP_ALIGN, [...]): Define.

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* config/rx/rx.h (JUMP_ALIGN, LABEL_ALIGN, LOOP_ALIGN): Define.
	(LABEL_ALIGN_AFTER_BARRIER): Pass label to rx_align_for_label
	* config/rx/rx.c (rx_align_for_label): Add label and
	uses_threshold parameters.  Do not align when the label is not
	used enough.
	* config/rx/rx-protos.h (rx_align_for_label): Update prototype.

From-SVN: r173615
This commit is contained in:
DJ Delorie 2011-05-10 07:01:49 -04:00 committed by Nick Clifton
parent be17328916
commit 34cc3c861d
4 changed files with 26 additions and 4 deletions
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9
gcc/ChangeLog
View File

@ -1,3 +1,12 @@
2011-05-10 DJ Delorie <dj@redhat.com>
* config/rx/rx.h (JUMP_ALIGN, LABEL_ALIGN, LOOP_ALIGN): Define.
(LABEL_ALIGN_AFTER_BARRIER): Pass label to rx_align_for_label
* config/rx/rx.c (rx_align_for_label): Add label and
uses_threshold parameters. Do not align when the label is not
used enough.
* config/rx/rx-protos.h (rx_align_for_label): Update prototype.
2011-05-10 Richard Guenther <rguenther@suse.de>
* tree-ssa-forwprop.c (combine_conversions): Pattern-match

4
gcc/config/rx/rx-protos.h
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@ -21,12 +21,12 @@
#ifndef GCC_RX_PROTOS_H
#define GCC_RX_PROTOS_H
extern int rx_align_for_label (void);
extern void rx_expand_prologue (void);
extern int rx_initial_elimination_offset (int, int);
#ifdef RTX_CODE
extern int rx_adjust_insn_length (rtx, int);
extern int rx_align_for_label (rtx, int);
extern void rx_emit_stack_popm (rtx *, bool);
extern void rx_emit_stack_pushm (rtx *);
extern void rx_expand_epilogue (bool);
@ -35,7 +35,7 @@ extern bool rx_legitimate_constant_p (enum machine_mode, rtx);
extern bool rx_is_restricted_memory_address (rtx,
enum machine_mode);
extern bool rx_match_ccmode (rtx, enum machine_mode);
extern void rx_notice_update_cc (rtx body, rtx insn);
extern void rx_notice_update_cc (rtx, rtx);
extern void rx_split_cbranch (enum machine_mode, enum rtx_code,
rtx, rtx, rtx);
extern enum machine_mode rx_select_cc_mode (enum rtx_code, rtx, rtx);

9
gcc/config/rx/rx.c
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@ -2776,8 +2776,15 @@ rx_match_ccmode (rtx insn, enum machine_mode cc_mode)
}
int
rx_align_for_label (void)
rx_align_for_label (rtx lab, int uses_threshold)
{
/* This is a simple heuristic to guess when an alignment would not be useful
because the delay due to the inserted NOPs would be greater than the delay
due to the misaligned branch. If uses_threshold is zero then the alignment
is always useful. */
if (LABEL_NUSES (lab) < uses_threshold)
return 0;
return optimize_size ? 1 : 3;
}

8
gcc/config/rx/rx.h
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@ -397,7 +397,13 @@ typedef unsigned int CUMULATIVE_ARGS;
#undef USER_LABEL_PREFIX
#define USER_LABEL_PREFIX "_"
#define LABEL_ALIGN_AFTER_BARRIER(x) rx_align_for_label ()
/* Compute the alignment needed for label X in various situations.
If the user has specified an alignment then honour that, otherwise
use rx_align_for_label. */
#define JUMP_ALIGN(x) (align_jumps ? align_jumps : rx_align_for_label (x, 0))
#define LABEL_ALIGN(x) (align_labels ? align_labels : rx_align_for_label (x, 3))
#define LOOP_ALIGN(x) (align_loops ? align_loops : rx_align_for_label (x, 2))
#define LABEL_ALIGN_AFTER_BARRIER(x) rx_align_for_label (x, 0)
#define ASM_OUTPUT_MAX_SKIP_ALIGN(STREAM, LOG, MAX_SKIP) \
do \