diff options
| author | hubicka <hubicka@138bc75d-0d04-0410-961f-82ee72b054a4> | 2002-05-08 11:13:54 +0000 |
|---|---|---|
| committer | hubicka <hubicka@138bc75d-0d04-0410-961f-82ee72b054a4> | 2002-05-08 11:13:54 +0000 |
| commit | 6eca0bfbf4e17711b5f5240bdaa9fc4e5897b80e (patch) | |
| tree | 7f34b4810050d284a3cd94485d4ebef7a2fa0015 | |
| parent | cd0fe062c23ebe2f55883f47befcacc3c0dca9ea (diff) | |
| download | gcc-6eca0bfbf4e17711b5f5240bdaa9fc4e5897b80e.tar.gz | |
* cse.c (dead_libcall_p): Update counts.
(delete_trivially_dead_insns): Update call of dead_libcall_p.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@53287 138bc75d-0d04-0410-961f-82ee72b054a4
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/cse.c | 13 |
2 files changed, 15 insertions, 3 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index bfeecda612b..686cacebee1 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +Wed May 8 13:12:11 CEST 2002 Jan Hubicka <jh@suse.cz> + + * cse.c (dead_libcall_p): Update counts. + (delete_trivially_dead_insns): Update call of dead_libcall_p. + Wed May 8 11:08:50 CEST 2002 Jan Hubicka <jh@suse.cz> * cfglayout.c (function_tail_eff_head): Rename to ... diff --git a/gcc/cse.c b/gcc/cse.c index c15c63fffb7..c292c520240 100644 --- a/gcc/cse.c +++ b/gcc/cse.c @@ -691,7 +691,7 @@ static int check_dependence PARAMS ((rtx *, void *)); static void flush_hash_table PARAMS ((void)); static bool insn_live_p PARAMS ((rtx, int *)); static bool set_live_p PARAMS ((rtx, rtx, int *)); -static bool dead_libcall_p PARAMS ((rtx)); +static bool dead_libcall_p PARAMS ((rtx, int *)); /* Dump the expressions in the equivalence class indicated by CLASSP. This function is used only for debugging. */ @@ -7571,8 +7571,9 @@ insn_live_p (insn, counts) /* Return true if libcall is dead as a whole. */ static bool -dead_libcall_p (insn) +dead_libcall_p (insn, counts) rtx insn; + int *counts; { rtx note; /* See if there's a REG_EQUAL note on this insn and try to @@ -7589,11 +7590,17 @@ dead_libcall_p (insn) if (!new) new = XEXP (note, 0); + /* While changing insn, we must update the counts accordingly. */ + count_reg_usage (insn, counts, NULL_RTX, -1); + if (set && validate_change (insn, &SET_SRC (set), new, 0)) { + count_reg_usage (insn, counts, NULL_RTX, 1); remove_note (insn, find_reg_note (insn, REG_RETVAL, NULL_RTX)); + remove_note (insn, note); return true; } + count_reg_usage (insn, counts, NULL_RTX, 1); } return false; } @@ -7652,7 +7659,7 @@ delete_trivially_dead_insns (insns, nreg) { in_libcall = 1; live_insn = 1; - dead_libcall = dead_libcall_p (insn); + dead_libcall = dead_libcall_p (insn, counts); } else if (in_libcall) live_insn = ! dead_libcall; |