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| author | Richard Kenner <kenner@gcc.gnu.org> | 1995-08-21 13:15:57 -0400 |
|---|---|---|
| committer | Richard Kenner <kenner@gcc.gnu.org> | 1995-08-21 13:15:57 -0400 |
| commit | c182df0b41f965988f06df25bcf63a98c0ec5030 (patch) | |
| tree | 99ee77bf6df62aa8c80a6bad997fb32c86bdf0da /gcc | |
| parent | 36f66f304842a54227f3a02d45b539fa9abd59c8 (diff) | |
| download | gcc-c182df0b41f965988f06df25bcf63a98c0ec5030.zip gcc-c182df0b41f965988f06df25bcf63a98c0ec5030.tar.gz gcc-c182df0b41f965988f06df25bcf63a98c0ec5030.tar.bz2 | |
(wipe_dead_reg): Make a register mentioned in a REG_INC note die after
the instruction.
From-SVN: r10264
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/local-alloc.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/gcc/local-alloc.c b/gcc/local-alloc.c index 3ab26ae..647b2d5 100644 --- a/gcc/local-alloc.c +++ b/gcc/local-alloc.c @@ -1,5 +1,5 @@ /* Allocate registers within a basic block, for GNU compiler. - Copyright (C) 1987, 1988, 1991, 1993, 1994 Free Software Foundation, Inc. + Copyright (C) 1987, 88, 91, 93, 94, 1995 Free Software Foundation, Inc. This file is part of GNU CC. @@ -2035,6 +2035,12 @@ wipe_dead_reg (reg, output_p) } } + /* If this register is used in an auto-increment address, then extend its + life to after this insn, so that it won't get allocated together with + the result of this insn. */ + if (! output_p && find_regno_note (this_insn, REG_INC, regno)) + output_p = 1; + if (regno < FIRST_PSEUDO_REGISTER) { mark_life (regno, GET_MODE (reg), 0); |