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| author | J"orn Rennecke <amylaar@cygnus.co.uk> | 1998-04-29 13:53:20 +0000 |
|---|---|---|
| committer | Joern Rennecke <amylaar@gcc.gnu.org> | 1998-04-29 14:53:20 +0100 |
| commit | 93da030f633623de87801b2aea0b8cfe79edebc2 (patch) | |
| tree | 1f31fde3493a2484bb977cf52131e3ece99e3543 | |
| parent | 0c84c6183433da16ca1062e0accb15b5f3abd664 (diff) | |
| download | gcc-93da030f633623de87801b2aea0b8cfe79edebc2.zip gcc-93da030f633623de87801b2aea0b8cfe79edebc2.tar.gz gcc-93da030f633623de87801b2aea0b8cfe79edebc2.tar.bz2 | |
sched.c (new_insn_dead_notes): Check if the register was used in the original instruction.
* sched.c (new_insn_dead_notes): Check if the register was
used in the original instruction.
* haifa-sched.c (new_insn_dead_notes): Likewise.
From-SVN: r19494
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/haifa-sched.c | 7 | ||||
| -rw-r--r-- | gcc/sched.c | 7 |
3 files changed, 20 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 42f7119..b0c68c2 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +Wed Apr 29 21:45:16 1998 J"orn Rennecke <amylaar@cygnus.co.uk> + + * sched.c (new_insn_dead_notes): Check if the register was + used in the original instruction. + * haifa-sched.c (new_insn_dead_notes): Likewise. + Wed Apr 29 13:46:03 1998 Jim Wilson <wilson@cygnus.com> * dwarf2out.c (scope_die_for): If could not find proper scope, diff --git a/gcc/haifa-sched.c b/gcc/haifa-sched.c index 8d220f0..7fccfd2 100644 --- a/gcc/haifa-sched.c +++ b/gcc/haifa-sched.c @@ -7621,6 +7621,13 @@ new_insn_dead_notes (pat, insn, last, orig_insn) if (GET_CODE (dest) == REG) { + /* If the original insn already used this register, we may not add new + notes for it. One example for a split that needs this test is + when a multi-word memory access with register-indirect addressing + is split into multiple memory accesses with auto-increment and + one adjusting add instruction for the address register. */ + if (reg_referenced_p (dest, PATTERN (orig_insn))) + return; for (tem = last; tem != insn; tem = PREV_INSN (tem)) { if (GET_RTX_CLASS (GET_CODE (tem)) == 'i' diff --git a/gcc/sched.c b/gcc/sched.c index a44002e..635dceb 100644 --- a/gcc/sched.c +++ b/gcc/sched.c @@ -3655,6 +3655,13 @@ new_insn_dead_notes (pat, insn, last, orig_insn) if (GET_CODE (dest) == REG) { + /* If the original insn already used this register, we may not add new + notes for it. One example for a split that needs this test is + when a multi-word memory access with register-indirect addressing + is split into multiple memory accesses with auto-increment and + one adjusting add instruction for the address register. */ + if (reg_referenced_p (dest, PATTERN (orig_insn))) + return; for (tem = last; tem != insn; tem = PREV_INSN (tem)) { if (GET_RTX_CLASS (GET_CODE (tem)) == 'i' |