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pr49089: enable avx256 splitting unaligned load/store only when beneficial

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* config/i386/i386.c (avx256_split_unaligned_load): New definition.
	(avx256_split_unaligned_store): New definition.
	(ix86_option_override_internal): Enable avx256 unaligned load/store
	splitting only when avx256_split_unaligned_load/store is set.

From-SVN: r175230
This commit is contained in:
Changpeng Fang 2011-06-20 21:52:32 +00:00 committed by Changpeng Fang
parent fea549356d
commit 97ef5ae607
2 changed files with 18 additions and 2 deletions
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8
gcc/ChangeLog
View File

@ -1,3 +1,11 @@
2011-06-20 Changpeng Fang <changpeng.fang@amd.com>
PR i386/49089
* config/i386/i386.c (avx256_split_unaligned_load): New definition.
(avx256_split_unaligned_store): New definition.
(ix86_option_override_internal): Enable avx256 unaligned load/store
splitting only when avx256_split_unaligned_load/store is set.
2011-06-20 Bernd Schmidt <bernds@codesourcery.com>
* regrename.c (scan_rtx_reg): Handle the case where we write to an

12
gcc/config/i386/i386.c
View File

@ -2122,6 +2122,12 @@ static const unsigned int x86_arch_always_fancy_math_387
= m_PENT | m_ATOM | m_PPRO | m_AMD_MULTIPLE | m_PENT4
| m_NOCONA | m_CORE2I7 | m_GENERIC;
static const unsigned int x86_avx256_split_unaligned_load
= m_COREI7 | m_GENERIC;
static const unsigned int x86_avx256_split_unaligned_store
= m_COREI7 | m_BDVER1 | m_GENERIC;
/* In case the average insn count for single function invocation is
lower than this constant, emit fast (but longer) prologue and
epilogue code. */
@ -3660,9 +3666,11 @@ ix86_option_override_internal (bool main_args_p)
if (flag_expensive_optimizations
&& !(target_flags_explicit & MASK_VZEROUPPER))
target_flags |= MASK_VZEROUPPER;
if (!(target_flags_explicit & MASK_AVX256_SPLIT_UNALIGNED_LOAD))
if ((x86_avx256_split_unaligned_load & ix86_tune_mask)
&& !(target_flags_explicit & MASK_AVX256_SPLIT_UNALIGNED_LOAD))
target_flags |= MASK_AVX256_SPLIT_UNALIGNED_LOAD;
if (!(target_flags_explicit & MASK_AVX256_SPLIT_UNALIGNED_STORE))
if ((x86_avx256_split_unaligned_store & ix86_tune_mask)
&& !(target_flags_explicit & MASK_AVX256_SPLIT_UNALIGNED_STORE))
target_flags |= MASK_AVX256_SPLIT_UNALIGNED_STORE;
}
}