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| author | Paolo Bonzini <bonzini@gnu.org> | 2009-05-12 09:52:27 +0000 |
|---|---|---|
| committer | Paolo Bonzini <bonzini@gcc.gnu.org> | 2009-05-12 09:52:27 +0000 |
| commit | 5e8d18263db963468b8ac2c15e352c91b7c9a3e6 (patch) | |
| tree | 9d31c3df7663febe72e115cd76a2cd35a011ece6 /gcc/optabs.c | |
| parent | f90b7a5a7913cc7239cce42f6ca328b9a741b387 (diff) | |
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revert: optabs.c (prepare_cmp_insn): Temporarily disable test that causes spurious differences between trunk and...
2009-05-12 Paolo Bonzini <bonzini@gnu.org>
Revert:
2009-05-12 Paolo Bonzini <bonzini@gnu.org>
* optabs.c (prepare_cmp_insn): Temporarily disable test that
causes spurious differences between trunk and cond-optab branch.
From-SVN: r147426
Diffstat (limited to 'gcc/optabs.c')
| -rw-r--r-- | gcc/optabs.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/gcc/optabs.c b/gcc/optabs.c index 970f150..9c8cb86 100644 --- a/gcc/optabs.c +++ b/gcc/optabs.c @@ -4015,6 +4015,17 @@ prepare_cmp_insn (rtx x, rtx y, enum rtx_code comparison, rtx size, gcc_assert (methods == OPTAB_DIRECT || methods == OPTAB_WIDEN || methods == OPTAB_LIB_WIDEN); + /* If we are optimizing, force expensive constants into a register. */ + if (CONSTANT_P (x) && optimize + && (rtx_cost (x, COMPARE, optimize_insn_for_speed_p ()) + > COSTS_N_INSNS (1))) + x = force_reg (mode, x); + + if (CONSTANT_P (y) && optimize + && (rtx_cost (y, COMPARE, optimize_insn_for_speed_p ()) + > COSTS_N_INSNS (1))) + y = force_reg (mode, y); + #ifdef HAVE_cc0 /* Make sure if we have a canonical comparison. The RTL documentation states that canonical comparisons are required only |