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rs6000.c (rs6000_gimple_fold_builtin): Add support for folding vec_perm.

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[gcc]

2018-07-06  Will Schmidt  <will_schmidt@vnet.ibm.com>

	* gcc/config/rs6000/rs6000.c (rs6000_gimple_fold_builtin): Add support
	for folding vec_perm.

From-SVN: r263520
This commit is contained in:
Will Schmidt 2018-08-13 19:23:38 +00:00 committed by Will Schmidt
parent 67bfa03ad1
commit d20d6e550c
2 changed files with 36 additions and 0 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2018-08-13 Will Schmidt <will_schmidt@vnet.ibm.com>
* gcc/config/rs6000/rs6000.c (rs6000_gimple_fold_builtin): Add support
for folding vec_perm.
2018-08-13 Will Schmidt <will_schmidt@vnet.ibm.com>
* config/rs6000/rs6000.c (rs6000_gimple_fold_builtin):

31
gcc/config/rs6000/rs6000.c
View File

@ -15823,6 +15823,37 @@ rs6000_gimple_fold_builtin (gimple_stmt_iterator *gsi)
case ALTIVEC_BUILTIN_VUPKLPX:
return false;
/* vec_perm. */
case ALTIVEC_BUILTIN_VPERM_16QI:
case ALTIVEC_BUILTIN_VPERM_8HI:
case ALTIVEC_BUILTIN_VPERM_4SI:
case ALTIVEC_BUILTIN_VPERM_2DI:
case ALTIVEC_BUILTIN_VPERM_4SF:
case ALTIVEC_BUILTIN_VPERM_2DF:
{
arg0 = gimple_call_arg (stmt, 0);
arg1 = gimple_call_arg (stmt, 1);
tree permute = gimple_call_arg (stmt, 2);
lhs = gimple_call_lhs (stmt);
location_t loc = gimple_location (stmt);
gimple_seq stmts = NULL;
// convert arg0 and arg1 to match the type of the permute
// for the VEC_PERM_EXPR operation.
tree permute_type = (TREE_TYPE (permute));
tree arg0_ptype = gimple_convert (&stmts, loc, permute_type, arg0);
tree arg1_ptype = gimple_convert (&stmts, loc, permute_type, arg1);
tree lhs_ptype = gimple_build (&stmts, loc, VEC_PERM_EXPR,
permute_type, arg0_ptype, arg1_ptype,
permute);
// Convert the result back to the desired lhs type upon completion.
tree temp = gimple_convert (&stmts, loc, TREE_TYPE (lhs), lhs_ptype);
gsi_insert_seq_before (gsi, stmts, GSI_SAME_STMT);
g = gimple_build_assign (lhs, temp);
gimple_set_location (g, loc);
gsi_replace (gsi, g, true);
return true;
}
default:
if (TARGET_DEBUG_BUILTIN)
fprintf (stderr, "gimple builtin intrinsic not matched:%d %s %s\n",