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| author | Jan Hubicka <jh@suse.cz> | 2004-01-20 23:16:59 +0100 |
|---|---|---|
| committer | Jan Hubicka <hubicka@gcc.gnu.org> | 2004-01-20 22:16:59 +0000 |
| commit | 3e89ed8dd36d61b8ebb6dea3a21c55a56d1662ac (patch) | |
| tree | 4e90a38b800d7602fd7eb1d4fd8ad649cb0465f5 /gcc/emit-rtl.c | |
| parent | 9b57b627f005582f50c30ada127a688c2b9e0f7f (diff) | |
| download | gcc-3e89ed8dd36d61b8ebb6dea3a21c55a56d1662ac.zip gcc-3e89ed8dd36d61b8ebb6dea3a21c55a56d1662ac.tar.gz gcc-3e89ed8dd36d61b8ebb6dea3a21c55a56d1662ac.tar.bz2 | |
emit-rtl.c (verify_rtx_sharing, [...]): Clobbers containing hard regs are shared.
* emit-rtl.c (verify_rtx_sharing, copy_insn_1,
emit_copy_of_insn_after, emit_copy_of_insn_after): Clobbers
containing hard regs are shared.
(gen_hard_reg_clobber): New function.
(hard_reg_clobbers): New array.
* genemit.c (gen_exp): Use gen_hard_reg_clobber.
(copy_rtx): Do not copy clobbers containing hard regs.
* rtl.h (gen_hard_reg_clobber): Declare.
From-SVN: r76233
Diffstat (limited to 'gcc/emit-rtl.c')
| -rw-r--r-- | gcc/emit-rtl.c | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/gcc/emit-rtl.c b/gcc/emit-rtl.c index a77b9d1..cdb0c2a 100644 --- a/gcc/emit-rtl.c +++ b/gcc/emit-rtl.c @@ -2231,8 +2231,12 @@ verify_rtx_sharing (rtx orig, rtx insn) case PC: case CC0: case SCRATCH: - /* SCRATCH must be shared because they represent distinct values. */ return; + /* SCRATCH must be shared because they represent distinct values. */ + case CLOBBER: + if (REG_P (XEXP (x, 0)) && REGNO (XEXP (x, 0)) < FIRST_PSEUDO_REGISTER) + return; + break; case CONST: /* CONST can be shared if it contains a SYMBOL_REF. If it contains @@ -2527,6 +2531,10 @@ repeat: case SCRATCH: /* SCRATCH must be shared because they represent distinct values. */ return; + case CLOBBER: + if (REG_P (XEXP (x, 0)) && REGNO (XEXP (x, 0)) < FIRST_PSEUDO_REGISTER) + return; + break; case CONST: /* CONST can be shared if it contains a SYMBOL_REF. If it contains @@ -5020,6 +5028,10 @@ copy_insn_1 (rtx orig) case CC0: case ADDRESSOF: return orig; + case CLOBBER: + if (REG_P (XEXP (orig, 0)) && REGNO (XEXP (orig, 0)) < FIRST_PSEUDO_REGISTER) + return orig; + break; case SCRATCH: for (i = 0; i < copy_insn_n_scratches; i++) @@ -5536,4 +5548,15 @@ emit_copy_of_insn_after (rtx insn, rtx after) return new; } +static GTY((deletable(""))) rtx hard_reg_clobbers [NUM_MACHINE_MODES][FIRST_PSEUDO_REGISTER]; +rtx +gen_hard_reg_clobber (enum machine_mode mode, unsigned int regno) +{ + if (hard_reg_clobbers[mode][regno]) + return hard_reg_clobbers[mode][regno]; + else + return (hard_reg_clobbers[mode][regno] = + gen_rtx_CLOBBER (VOIDmode, gen_rtx_REG (mode, regno))); +} + #include "gt-emit-rtl.h" |