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* stmt.c (lshift_cheap_p): Support properly optimize_insn_for_speed_p.

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From-SVN: r166983
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Jan Hubicka 2010-11-20 21:56:48 +01:00 • committed by Jan Hubicka
parent 1f980c2509
commit 700c498021
2 changed files with 13 additions and 7 deletions
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4
gcc/ChangeLog
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@ -1,3 +1,7 @@
2010-11-20 Jan Hubicka <jh@suse.cz>
* stmt.c (lshift_cheap_p): Support properly optimize_insn_for_speed_p.
2010-11-20 Ralf Wildenhues <Ralf.Wildenhues@gmx.de>
PR other/46202

16
gcc/stmt.c
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@ -2122,19 +2122,21 @@ struct case_bit_test
static
bool lshift_cheap_p (void)
{
static bool init = false;
static bool cheap = true;
static bool init[2] = {false, false};
static bool cheap[2] = {true, true};
if (!init)
bool speed_p = optimize_insn_for_speed_p ();
if (!init[speed_p])
{
rtx reg = gen_rtx_REG (word_mode, 10000);
int cost = rtx_cost (gen_rtx_ASHIFT (word_mode, const1_rtx, reg), SET,
optimize_insn_for_speed_p ());
cheap = cost < COSTS_N_INSNS (3);
init = true;
speed_p);
cheap[speed_p] = cost < COSTS_N_INSNS (3);
init[speed_p] = true;
}
return cheap;
return cheap[speed_p];
}
/* Comparison function for qsort to order bit tests by decreasing