diff options
| author | Jim Wilson <wilson@gcc.gnu.org> | 1992-12-31 14:44:22 -0800 |
|---|---|---|
| committer | Jim Wilson <wilson@gcc.gnu.org> | 1992-12-31 14:44:22 -0800 |
| commit | e6b89e8bf27c932835b54313cc7e3a78bf07d0ce (patch) | |
| tree | 03ead9b6eb6f5f1aabd997d26ed33ae234ed1fe9 /gcc/sched.c | |
| parent | b7d9fc385d6d5acf26f8c36d8cab92e44db3b56a (diff) | |
| download | gcc-e6b89e8bf27c932835b54313cc7e3a78bf07d0ce.zip gcc-e6b89e8bf27c932835b54313cc7e3a78bf07d0ce.tar.gz gcc-e6b89e8bf27c932835b54313cc7e3a78bf07d0ce.tar.bz2 | |
(sched_analyze_1, sched_analyze_2): If before reloading,
record dependences that may be introduced by reload substituting
equivalents for pseudo registers.
From-SVN: r3036
Diffstat (limited to 'gcc/sched.c')
| -rw-r--r-- | gcc/sched.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/gcc/sched.c b/gcc/sched.c index 93bd06c..7df147a 100644 --- a/gcc/sched.c +++ b/gcc/sched.c @@ -1610,6 +1610,14 @@ sched_analyze_1 (x, insn) add_dependence (insn, reg_last_sets[regno], REG_DEP_OUTPUT); reg_last_sets[regno] = insn; + /* Pseudos that are REG_EQUIV to something may be replaced + by that during reloading, so we can potentially read + quantities mentioned in those addresses. */ + if (! reload_completed) + if (reg_known_value[regno] != regno_reg_rtx[regno]) + if (GET_CODE (reg_known_value[regno]) == MEM) + sched_analyze_2 (XEXP (reg_known_value[regno], 0), insn); + /* Don't let it cross a call after scheduling if it doesn't already cross one. */ if (reg_n_calls_crossed[regno] == 0 && last_function_call) @@ -1762,6 +1770,12 @@ sched_analyze_2 (x, insn) if (reg_last_sets[regno]) add_dependence (insn, reg_last_sets[regno], 0); + /* Pseudos that are REG_EQUIV to something may be replaced + by that, so we depend on anything mentioned there too. */ + if (! reload_completed) + if (reg_known_value[regno] != regno_reg_rtx[regno]) + sched_analyze_2 (reg_known_value[regno], insn); + /* If the register does not already cross any calls, then add this insn to the sched_before_next_call list so that it will still not cross calls after scheduling. */ |