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| author | Alan Lawrence <alan.lawrence@arm.com> | 2014-10-27 14:20:52 +0000 |
|---|---|---|
| committer | Alan Lawrence <alalaw01@gcc.gnu.org> | 2014-10-27 14:20:52 +0000 |
| commit | d43a252e2fa612b14fa7f6f4dec3320c8b313a1c (patch) | |
| tree | bcaacd0bd9927dbb5bc3f3a2660d16c40919ad1b /gcc/optabs.c | |
| parent | 99f76d9bacfcef28546dda5a51cb3651ba422518 (diff) | |
| download | gcc-d43a252e2fa612b14fa7f6f4dec3320c8b313a1c.tar.gz | |
Add new optabs for reducing vectors to scalars
PR tree-optimization/61114
* doc/md.texi (Standard Names): Add reduc_(plus,[us](min|max))|scal
optabs, and note in reduc_[us](plus|min|max) to prefer the former.
* expr.c (expand_expr_real_2): Use reduc_..._scal if available, fall
back to old reduc_... + BIT_FIELD_REF only if not.
* optabs.c (optab_for_tree_code): for REDUC_(MAX,MIN,PLUS)_EXPR,
return the reduce-to-scalar (reduc_..._scal) optab.
(scalar_reduc_to_vector): New.
* optabs.def (reduc_smax_scal_optab, reduc_smin_scal_optab,
reduc_plus_scal_optab, reduc_umax_scal_optab, reduc_umin_scal_optab):
New.
* optabs.h (scalar_reduc_to_vector): Declare.
* tree-vect-loop.c (vectorizable_reduction): Look for optabs reducing
to either scalar or vector.
From-SVN: r216737
Diffstat (limited to 'gcc/optabs.c')
| -rw-r--r-- | gcc/optabs.c | 29 |
1 files changed, 25 insertions, 4 deletions
diff --git a/gcc/optabs.c b/gcc/optabs.c index 61e0df8e2bf..c3623eae15a 100644 --- a/gcc/optabs.c +++ b/gcc/optabs.c @@ -509,13 +509,15 @@ optab_for_tree_code (enum tree_code code, const_tree type, return fma_optab; case REDUC_MAX_EXPR: - return TYPE_UNSIGNED (type) ? reduc_umax_optab : reduc_smax_optab; + return TYPE_UNSIGNED (type) + ? reduc_umax_scal_optab : reduc_smax_scal_optab; case REDUC_MIN_EXPR: - return TYPE_UNSIGNED (type) ? reduc_umin_optab : reduc_smin_optab; + return TYPE_UNSIGNED (type) + ? reduc_umin_scal_optab : reduc_smin_scal_optab; case REDUC_PLUS_EXPR: - return TYPE_UNSIGNED (type) ? reduc_uplus_optab : reduc_splus_optab; + return reduc_plus_scal_optab; case VEC_LSHIFT_EXPR: return vec_shl_optab; @@ -611,7 +613,26 @@ optab_for_tree_code (enum tree_code code, const_tree type, return unknown_optab; } } - + +/* Given optab UNOPTAB that reduces a vector to a scalar, find instead the old + optab that produces a vector with the reduction result in one element, + for a tree with type TYPE. */ + +optab +scalar_reduc_to_vector (optab unoptab, const_tree type) +{ + switch (unoptab) + { + case reduc_plus_scal_optab: + return TYPE_UNSIGNED (type) ? reduc_uplus_optab : reduc_splus_optab; + + case reduc_smin_scal_optab: return reduc_smin_optab; + case reduc_umin_scal_optab: return reduc_umin_optab; + case reduc_smax_scal_optab: return reduc_smax_optab; + case reduc_umax_scal_optab: return reduc_umax_optab; + default: return unknown_optab; + } +} /* Expand vector widening operations. |