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| author | Roger Sayle <roger@eyesopen.com> | 2006-07-19 05:13:56 +0000 |
|---|---|---|
| committer | Roger Sayle <sayle@gcc.gnu.org> | 2006-07-19 05:13:56 +0000 |
| commit | cb2eb96f4d81b3ce61fd0070b59bfaf568c04f31 (patch) | |
| tree | 3487eac9da851d55f914f10ff317d63bd8311b83 /gcc/expmed.c | |
| parent | f604fc3b2ea1d6738af942668d16ddd5cd2663a8 (diff) | |
| download | gcc-cb2eb96f4d81b3ce61fd0070b59bfaf568c04f31.zip gcc-cb2eb96f4d81b3ce61fd0070b59bfaf568c04f31.tar.gz gcc-cb2eb96f4d81b3ce61fd0070b59bfaf568c04f31.tar.bz2 | |
re PR middle-end/28283 (SuperH: Very unoptimal code generated for 64-bit ints)
PR middle-end/28283
* expmed.c (expand_shift): Additionally check that the shift_cost
is not MAX_COST and that INTVAL(op1) is less than MAX_BITS_PER_WORD
before implementing a LSHIFT_EXPR as a sequence of additions.
* config/sh/sh.c (shift_costs): Return MAX_COST to inform the
middle-end that DImode shifts need to be synthesized by expand.
From-SVN: r115578
Diffstat (limited to 'gcc/expmed.c')
| -rw-r--r-- | gcc/expmed.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/gcc/expmed.c b/gcc/expmed.c index 6f4e331..0f3a14d 100644 --- a/gcc/expmed.c +++ b/gcc/expmed.c @@ -2217,7 +2217,9 @@ expand_shift (enum tree_code code, enum machine_mode mode, rtx shifted, && GET_CODE (op1) == CONST_INT && INTVAL (op1) > 0 && INTVAL (op1) < GET_MODE_BITSIZE (mode) - && shift_cost[mode][INTVAL (op1)] > INTVAL (op1) * add_cost[mode]) + && INTVAL (op1) < MAX_BITS_PER_WORD + && shift_cost[mode][INTVAL (op1)] > INTVAL (op1) * add_cost[mode] + && shift_cost[mode][INTVAL (op1)] != MAX_COST) { int i; for (i = 0; i < INTVAL (op1); i++) |