diff options
Diffstat (limited to 'gcc/genattrtab.c')
| -rw-r--r-- | gcc/genattrtab.c | 87 |
1 files changed, 12 insertions, 75 deletions
diff --git a/gcc/genattrtab.c b/gcc/genattrtab.c index 46b9bdd..0796a1b 100644 --- a/gcc/genattrtab.c +++ b/gcc/genattrtab.c @@ -1784,20 +1784,7 @@ operate_exp (op, left, right) /* If the resulting cond is trivial (all alternatives give the same value), optimize it away. */ if (allsame) - { - if (!ggc_p) - obstack_free (rtl_obstack, newexp); - return operate_exp (op, left, XEXP (right, 1)); - } - - /* If the result is the same as the RIGHT operand, - just use that. */ - if (rtx_equal_p (newexp, right)) - { - if (!ggc_p) - obstack_free (rtl_obstack, newexp); - return right; - } + return operate_exp (op, left, XEXP (right, 1)); return newexp; } @@ -1843,20 +1830,12 @@ operate_exp (op, left, right) /* If the cond is trivial (all alternatives give the same value), optimize it away. */ if (allsame) - { - if (!ggc_p) - obstack_free (rtl_obstack, newexp); - return operate_exp (op, XEXP (left, 1), right); - } + return operate_exp (op, XEXP (left, 1), right); /* If the result is the same as the LEFT operand, just use that. */ if (rtx_equal_p (newexp, left)) - { - if (!ggc_p) - obstack_free (rtl_obstack, newexp); - return left; - } + return left; return newexp; } @@ -2675,18 +2654,12 @@ simplify_cond (exp, insn_code, insn_index) if (len == 0) { - if (!ggc_p) - obstack_free (rtl_obstack, first_spacer); if (GET_CODE (defval) == COND) return simplify_cond (defval, insn_code, insn_index); return defval; } else if (allsame) - { - if (!ggc_p) - obstack_free (rtl_obstack, first_spacer); - return exp; - } + return exp; else { rtx newexp = rtx_alloc (COND); @@ -3200,7 +3173,6 @@ simplify_test_exp (exp, insn_code, insn_index) struct insn_ent *ie; int i; rtx newexp = exp; - char *spacer = (char *) obstack_finish (rtl_obstack); /* Don't re-simplify something we already simplified. */ if (RTX_UNCHANGING_P (exp) || MEM_IN_STRUCT_P (exp)) @@ -3212,19 +3184,11 @@ simplify_test_exp (exp, insn_code, insn_index) left = SIMPLIFY_TEST_EXP (XEXP (exp, 0), insn_code, insn_index); SIMPLIFY_ALTERNATIVE (left); if (left == false_rtx) - { - if (!ggc_p) - obstack_free (rtl_obstack, spacer); - return false_rtx; - } + return false_rtx; right = SIMPLIFY_TEST_EXP (XEXP (exp, 1), insn_code, insn_index); SIMPLIFY_ALTERNATIVE (right); if (left == false_rtx) - { - if (!ggc_p) - obstack_free (rtl_obstack, spacer); - return false_rtx; - } + return false_rtx; /* If either side is an IOR and we have (eq_attr "alternative" ..") present on both sides, apply the distributive law since this will @@ -3253,11 +3217,7 @@ simplify_test_exp (exp, insn_code, insn_index) left = simplify_and_tree (left, &right, insn_code, insn_index); if (left == false_rtx || right == false_rtx) - { - if (!ggc_p) - obstack_free (rtl_obstack, spacer); - return false_rtx; - } + return false_rtx; else if (left == true_rtx) { return right; @@ -3313,30 +3273,18 @@ simplify_test_exp (exp, insn_code, insn_index) left = SIMPLIFY_TEST_EXP (XEXP (exp, 0), insn_code, insn_index); SIMPLIFY_ALTERNATIVE (left); if (left == true_rtx) - { - if (!ggc_p) - obstack_free (rtl_obstack, spacer); - return true_rtx; - } + return true_rtx; right = SIMPLIFY_TEST_EXP (XEXP (exp, 1), insn_code, insn_index); SIMPLIFY_ALTERNATIVE (right); if (right == true_rtx) - { - if (!ggc_p) - obstack_free (rtl_obstack, spacer); - return true_rtx; - } + return true_rtx; right = simplify_or_tree (right, &left, insn_code, insn_index); if (left == XEXP (exp, 0) && right == XEXP (exp, 1)) left = simplify_or_tree (left, &right, insn_code, insn_index); if (right == true_rtx || left == true_rtx) - { - if (!ggc_p) - obstack_free (rtl_obstack, spacer); - return true_rtx; - } + return true_rtx; else if (left == false_rtx) { return right; @@ -3420,17 +3368,9 @@ simplify_test_exp (exp, insn_code, insn_index) return XEXP (left, 0); if (left == false_rtx) - { - if (!ggc_p) - obstack_free (rtl_obstack, spacer); - return true_rtx; - } + return true_rtx; else if (left == true_rtx) - { - if (!ggc_p) - obstack_free (rtl_obstack, spacer); - return false_rtx; - } + return false_rtx; /* Try to apply De`Morgan's laws. */ else if (GET_CODE (left) == IOR) @@ -3564,7 +3504,6 @@ optimize_attrs () for (iv = insn_code_values[i]; iv; iv = iv->next) { struct obstack *old = rtl_obstack; - char *spacer = (char *) obstack_finish (temp_obstack); attr = iv->attr; av = iv->av; @@ -3593,8 +3532,6 @@ optimize_attrs () insert_insn_ent (av, ie); something_changed = 1; } - if (!ggc_p) - obstack_free (temp_obstack, spacer); } } } |