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| author | Richard Henderson <rth@cygnus.com> | 1998-08-15 18:55:58 -0600 |
|---|---|---|
| committer | Jeff Law <law@gcc.gnu.org> | 1998-08-15 18:55:58 -0600 |
| commit | 8ec82f87f37e49d9b5c95f680428613d3a709b39 (patch) | |
| tree | 008d2e6d0e639a57c9ead6955d7169479dc5945c /gcc | |
| parent | 2753f812d469da384868027ea56249a8d998192e (diff) | |
| download | gcc-8ec82f87f37e49d9b5c95f680428613d3a709b39.zip gcc-8ec82f87f37e49d9b5c95f680428613d3a709b39.tar.gz gcc-8ec82f87f37e49d9b5c95f680428613d3a709b39.tar.bz2 | |
reload.c (find_equiv_reg): Reject equivalences separated by a volatile instruction.
8
* reload.c (find_equiv_reg): Reject equivalences separated
by a volatile instruction.
From-SVN: r21763
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/reload.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/gcc/reload.c b/gcc/reload.c index 1461cad..b1483d1 100644 --- a/gcc/reload.c +++ b/gcc/reload.c @@ -6198,12 +6198,17 @@ find_equiv_reg (goal, insn, class, other, reload_reg_p, goalreg, mode) if (GET_RTX_CLASS (GET_CODE (p)) == 'i') { + pat = PATTERN (p); + + /* Watch out for unspec_volatile, and volatile asms. */ + if (volatile_insn_p (pat)) + return 0; + /* If this insn P stores in either GOAL or VALUE, return 0. If GOAL is a memory ref and this insn writes memory, return 0. If GOAL is a memory ref and its address is not constant, and this insn P changes a register used in GOAL, return 0. */ - pat = PATTERN (p); if (GET_CODE (pat) == SET || GET_CODE (pat) == CLOBBER) { register rtx dest = SET_DEST (pat); |