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| author | kan <kan@FreeBSD.org> | 2006-08-26 21:29:10 +0000 |
|---|---|---|
| committer | kan <kan@FreeBSD.org> | 2006-08-26 21:29:10 +0000 |
| commit | ab6c6e434e4ca0bf593007d49dee6eceb73286c0 (patch) | |
| tree | 843ffc6140f66bf60562adb1bf8d3d82b9739b5e /contrib/gcc/local-alloc.c | |
| parent | 8a6911d2bb988a943624cbf4e4041b827d9ade53 (diff) | |
| download | FreeBSD-src-ab6c6e434e4ca0bf593007d49dee6eceb73286c0.zip FreeBSD-src-ab6c6e434e4ca0bf593007d49dee6eceb73286c0.tar.gz | |
Gcc 3.4.6 as of 2006/08/25 #116475.
Diffstat (limited to 'contrib/gcc/local-alloc.c')
| -rw-r--r-- | contrib/gcc/local-alloc.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/contrib/gcc/local-alloc.c b/contrib/gcc/local-alloc.c index 61ff7fb..6b1203d 100644 --- a/contrib/gcc/local-alloc.c +++ b/contrib/gcc/local-alloc.c @@ -120,6 +120,11 @@ struct qty int n_calls_crossed; + /* Number of times a reg tied to given qty lives across a CALL_INSN + that might throw. */ + + int n_throwing_calls_crossed; + /* The register number of one pseudo register whose reg_qty value is Q. This register should be the head of the chain maintained in reg_next_in_qty. */ @@ -317,6 +322,7 @@ alloc_qty (int regno, enum machine_mode mode, int size, int birth) qty[qtyno].mode = mode; qty[qtyno].birth = birth; qty[qtyno].n_calls_crossed = REG_N_CALLS_CROSSED (regno); + qty[qtyno].n_throwing_calls_crossed = REG_N_THROWING_CALLS_CROSSED (regno); qty[qtyno].min_class = reg_preferred_class (regno); qty[qtyno].alternate_class = reg_alternate_class (regno); qty[qtyno].n_refs = REG_N_REFS (regno); @@ -1119,6 +1125,7 @@ update_equiv_regs (void) REG_BASIC_BLOCK (regno) = bb->index; REG_N_CALLS_CROSSED (regno) = 0; + REG_N_THROWING_CALLS_CROSSED (regno) = 0; REG_LIVE_LENGTH (regno) = 2; if (insn == BB_HEAD (bb)) @@ -1946,6 +1953,8 @@ combine_regs (rtx usedreg, rtx setreg, int may_save_copy, int insn_number, /* Update info about quantity SQTY. */ qty[sqty].n_calls_crossed += REG_N_CALLS_CROSSED (sreg); + qty[sqty].n_throwing_calls_crossed + += REG_N_THROWING_CALLS_CROSSED (sreg); qty[sqty].n_refs += REG_N_REFS (sreg); qty[sqty].freq += REG_FREQ (sreg); if (usize < ssize) @@ -2251,12 +2260,14 @@ find_free_reg (enum reg_class class, enum machine_mode mode, int qtyno, /* We need not check to see if the current function has nonlocal labels because we don't put any pseudos that are live over calls in - registers in that case. */ + registers in that case. Avoid putting pseudos crossing calls that + might throw into call used registers. */ if (! accept_call_clobbered && flag_caller_saves && ! just_try_suggested && qty[qtyno].n_calls_crossed != 0 + && qty[qtyno].n_throwing_calls_crossed == 0 && CALLER_SAVE_PROFITABLE (qty[qtyno].n_refs, qty[qtyno].n_calls_crossed)) { |
