From: Zack Weinberg Date: Mon, 14 Feb 2000 01:32:19 +0000 (+0000) Subject: cse.c (cse_altered): New internal flag. X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=4eadede7c1f74d804d54f1f5d4257d53c91fe6c1;p=gcc.git cse.c (cse_altered): New internal flag. 2000-02-13 Zack Weinberg * cse.c (cse_altered): New internal flag. (cse_insn): Set it if we changed an insn. (cse_main): Clear cse_altered before each basic block. Only garbage collect if cse_altered is true afterward. From-SVN: r31962 --- diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 62b8265a7d4..99d6003dec9 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,10 @@ +2000-02-13 Zack Weinberg + + * cse.c (cse_altered): New internal flag. + (cse_insn): Set it if we changed an insn. + (cse_main): Clear cse_altered before each basic block. + Only garbage collect if cse_altered is true afterward. + Sun Feb 13 14:12:28 2000 Rainer Orth * sparc/sol2.h (LIB_SPEC): Link -ldl if profiling. diff --git a/gcc/cse.c b/gcc/cse.c index 9aced05f607..822986f1282 100644 --- a/gcc/cse.c +++ b/gcc/cse.c @@ -371,6 +371,11 @@ static int max_uid; #define INSN_CUID(INSN) (uid_cuid[INSN_UID (INSN)]) +/* Nonzero if this pass has made changes, and therefore it's + worthwhile to run the garbage collector. */ + +static int cse_altered; + /* Nonzero if cse has altered conditional jump insns in such a way that jump optimization should be redone. */ @@ -5313,6 +5318,7 @@ cse_insn (insn, libcall_insn) /* If we made a change, recompute SRC values. */ if (src != sets[i].src) { + cse_altered = 1; do_not_record = 0; hash_arg_in_memory = 0; sets[i].src = src; @@ -6784,6 +6790,7 @@ cse_main (f, nregs, after_loop, file) insn = f; while (insn) { + cse_altered = 0; cse_end_of_basic_block (insn, &val, flag_cse_follow_jumps, after_loop, flag_cse_skip_blocks); @@ -6834,7 +6841,7 @@ cse_main (f, nregs, after_loop, file) cse_jumps_altered |= old_cse_jumps_altered; } - if (ggc_p) + if (ggc_p && cse_altered) ggc_collect (); #ifdef USE_C_ALLOCA