diff options
Diffstat (limited to 'gcc/emit-rtl.c')
| -rw-r--r-- | gcc/emit-rtl.c | 58 |
1 files changed, 24 insertions, 34 deletions
diff --git a/gcc/emit-rtl.c b/gcc/emit-rtl.c index 0b2c10de..a87c519 100644 --- a/gcc/emit-rtl.c +++ b/gcc/emit-rtl.c @@ -158,21 +158,18 @@ struct rtx_def const_int_rtx[MAX_SAVED_CONST_INT * 2 + 1]; /* start_sequence and gen_sequence can make a lot of rtx expressions which are shortly thrown away. We use two mechanisms to prevent this waste: - First, we keep a list of the expressions used to represent the sequence - stack in sequence_element_free_list. - - Second, for sizes up to 5 elements, we keep a SEQUENCE and its associated - rtvec for use by gen_sequence. One entry for each size is sufficient - because most cases are calls to gen_sequence followed by immediately - emitting the SEQUENCE. Reuse is safe since emitting a sequence is - destructive on the insn in it anyway and hence can't be redone. + For sizes up to 5 elements, we keep a SEQUENCE and its associated + rtvec for use by gen_sequence. One entry for each size is + sufficient because most cases are calls to gen_sequence followed by + immediately emitting the SEQUENCE. Reuse is safe since emitting a + sequence is destructive on the insn in it anyway and hence can't be + redone. We do not bother to save this cached data over nested function calls. Instead, we just reinitialize them. */ #define SEQUENCE_RESULT_SIZE 5 -static struct sequence_stack *sequence_element_free_list; static rtx sequence_result[SEQUENCE_RESULT_SIZE]; /* During RTL generation, we also keep a list of free INSN rtl codes. */ @@ -2256,7 +2253,7 @@ make_insn_raw (pattern) register rtx insn; /* If in RTL generation phase, see if FREE_INSN can be used. */ - if (free_insn != 0 && rtx_equal_function_value_matters) + if (!ggc_p && free_insn != 0 && rtx_equal_function_value_matters) { insn = free_insn; free_insn = NEXT_INSN (free_insn); @@ -2600,7 +2597,7 @@ emit_insn_before (pattern, before) insn = XVECEXP (pattern, 0, i); add_insn_before (insn, before); } - if (XVECLEN (pattern, 0) < SEQUENCE_RESULT_SIZE) + if (!ggc_p && XVECLEN (pattern, 0) < SEQUENCE_RESULT_SIZE) sequence_result[XVECLEN (pattern, 0)] = pattern; } else @@ -2720,7 +2717,7 @@ emit_insn_after (pattern, after) add_insn_after (insn, after); after = insn; } - if (XVECLEN (pattern, 0) < SEQUENCE_RESULT_SIZE) + if (!ggc_p && XVECLEN (pattern, 0) < SEQUENCE_RESULT_SIZE) sequence_result[XVECLEN (pattern, 0)] = pattern; } else @@ -2868,7 +2865,7 @@ emit_insn (pattern) insn = XVECEXP (pattern, 0, i); add_insn (insn); } - if (XVECLEN (pattern, 0) < SEQUENCE_RESULT_SIZE) + if (!ggc_p && XVECLEN (pattern, 0) < SEQUENCE_RESULT_SIZE) sequence_result[XVECLEN (pattern, 0)] = pattern; } else @@ -3188,14 +3185,7 @@ start_sequence () { struct sequence_stack *tem; - if (sequence_element_free_list) - { - /* Reuse a previously-saved struct sequence_stack. */ - tem = sequence_element_free_list; - sequence_element_free_list = tem->next; - } - else - tem = (struct sequence_stack *) permalloc (sizeof (struct sequence_stack)); + tem = (struct sequence_stack *) xmalloc (sizeof (struct sequence_stack)); tem->next = seq_stack; tem->first = first_insn; @@ -3298,8 +3288,7 @@ end_sequence () seq_rtl_expr = tem->sequence_rtl_expr; seq_stack = tem->next; - tem->next = sequence_element_free_list; - sequence_element_free_list = tem; + free (tem); } /* Return 1 if currently emitting into a sequence. */ @@ -3340,14 +3329,18 @@ gen_sequence () || (GET_CODE (first_insn) == CALL_INSN && CALL_INSN_FUNCTION_USAGE (first_insn) == NULL_RTX))) { - NEXT_INSN (first_insn) = free_insn; - free_insn = first_insn; + if (!ggc_p) + { + NEXT_INSN (first_insn) = free_insn; + free_insn = first_insn; + } return PATTERN (first_insn); } /* Put them in a vector. See if we already have a SEQUENCE of the appropriate length around. */ - if (len < SEQUENCE_RESULT_SIZE && (result = sequence_result[len]) != 0) + if (!ggc_p && len < SEQUENCE_RESULT_SIZE + && (result = sequence_result[len]) != 0) sequence_result[len] = 0; else { @@ -3385,7 +3378,6 @@ clear_emit_caches () int i; /* Clear the start_sequence/gen_sequence cache. */ - sequence_element_free_list = 0; for (i = 0; i < SEQUENCE_RESULT_SIZE; i++) sequence_result[i] = 0; free_insn = 0; @@ -3418,17 +3410,15 @@ init_emit () f->emit->regno_pointer_flag_length = LAST_VIRTUAL_REGISTER + 101; f->emit->regno_pointer_flag - = (char *) xmalloc (f->emit->regno_pointer_flag_length); - bzero (f->emit->regno_pointer_flag, f->emit->regno_pointer_flag_length); + = (char *) xcalloc (f->emit->regno_pointer_flag_length, sizeof (char)); f->emit->regno_pointer_align - = (char *) xmalloc (f->emit->regno_pointer_flag_length); - bzero (f->emit->regno_pointer_align, f->emit->regno_pointer_flag_length); + = (char *) xcalloc (f->emit->regno_pointer_flag_length, + sizeof (char)); regno_reg_rtx - = (rtx *) xmalloc (f->emit->regno_pointer_flag_length * sizeof (rtx)); - bzero ((char *) regno_reg_rtx, - f->emit->regno_pointer_flag_length * sizeof (rtx)); + = (rtx *) xcalloc (f->emit->regno_pointer_flag_length * sizeof (rtx), + sizeof (rtx)); /* Put copies of all the virtual register rtx into regno_reg_rtx. */ init_virtual_regs (f->emit); |