diff options
| author | J"orn Rennecke <amylaar@cygnus.co.uk> | 1998-09-24 10:51:35 +0000 |
|---|---|---|
| committer | Joern Rennecke <amylaar@gcc.gnu.org> | 1998-09-24 11:51:35 +0100 |
| commit | c10638c92243bc58ec745d4229927a55ba8da730 (patch) | |
| tree | 847a74a395f5537267706887c3082299e0c03adc /gcc/reload.c | |
| parent | 34c73909813a5b2225ceac86dc6402f86b64d451 (diff) | |
| download | gcc-c10638c92243bc58ec745d4229927a55ba8da730.zip gcc-c10638c92243bc58ec745d4229927a55ba8da730.tar.gz gcc-c10638c92243bc58ec745d4229927a55ba8da730.tar.bz2 | |
reload.c (find_reloads): In code to promote RELOAD_FOR_X_ADDR_ADDR reloads to RELOAD_FOR_X_ADDRESS...
* reload.c (find_reloads): In code to promote RELOAD_FOR_X_ADDR_ADDR
reloads to RELOAD_FOR_X_ADDRESS reloads, test for reload sharing.
Properly keep track of first RELOAD_FOR_X_ADDRESS also for
more than 3 such reloads.
If there is not more than one RELOAD_FOR_X_ADDRESS, don't change
RELOAD_FOR_X_ADDR_ADDR reload.
From-SVN: r22568
Diffstat (limited to 'gcc/reload.c')
| -rw-r--r-- | gcc/reload.c | 29 |
1 files changed, 23 insertions, 6 deletions
diff --git a/gcc/reload.c b/gcc/reload.c index 1aec4fb..428ce87 100644 --- a/gcc/reload.c +++ b/gcc/reload.c @@ -4018,7 +4018,8 @@ find_reloads (insn, replace, ind_levels, live_known, reload_reg_p) a single operand. We can reduce the register pressure by exploiting that a RELOAD_FOR_X_ADDR_ADDR that precedes all RELOAD_FOR_X_ADDRESS reloads - does not conflict with any of them. */ + does not conflict with any of them, if it is only used for the first of + the RELOAD_FOR_X_ADDRESS reloads. */ { int first_op_addr_num = -2; int first_inpaddr_num[MAX_RECOG_OPERANDS]; @@ -4037,21 +4038,21 @@ find_reloads (insn, replace, ind_levels, live_known, reload_reg_p) switch (reload_when_needed[i]) { case RELOAD_FOR_OPERAND_ADDRESS: - if (! ++first_op_addr_num) + if (++first_op_addr_num >= 0) { - first_op_addr_num= i; + first_op_addr_num = i; need_change = 1; } break; case RELOAD_FOR_INPUT_ADDRESS: - if (! ++first_inpaddr_num[reload_opnum[i]]) + if (++first_inpaddr_num[reload_opnum[i]] >= 0) { first_inpaddr_num[reload_opnum[i]] = i; need_change = 1; } break; case RELOAD_FOR_OUTPUT_ADDRESS: - if (! ++first_outpaddr_num[reload_opnum[i]]) + if (++first_outpaddr_num[reload_opnum[i]] >= 0) { first_outpaddr_num[reload_opnum[i]] = i; need_change = 1; @@ -4085,8 +4086,24 @@ find_reloads (insn, replace, ind_levels, live_known, reload_reg_p) default: continue; } - if (i > first_num) + if (first_num < 0) + continue; + else if (i > first_num) reload_when_needed[i] = type; + else + { + /* Check if the only TYPE reload that uses reload I is + reload FIRST_NUM. */ + for (j = n_reloads - 1; j > first_num; j--) + { + if (reload_when_needed[j] == type + && reg_mentioned_p (reload_in[i], reload_in[j])) + { + reload_when_needed[i] = type; + break; + } + } + } } } } |