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re PR tree-optimization/92554 (ICE in vect_create_epilog_for_reduction, at tree-vect-loop.c:4325)

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2019-11-19  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/92554
	* tree-vect-loop.c (vect_create_epilog_for_reduction): Look
	for the actual condition stmt and deal with sign-changes.

	* gcc.dg/vect/pr92554.c: New testcase.

From-SVN: r278431
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Richard Biener 2019-11-19 07:33:58 +00:00 committed by Richard Biener
parent f1e0c7e0eb
commit 04c4599d30
4 changed files with 45 additions and 13 deletions
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8
gcc/ChangeLog
View File

@ -1,4 +1,10 @@
2019-09-19 Richard Biener <rguenther@suse.de>
2019-11-19 Richard Biener <rguenther@suse.de>
PR tree-optimization/92554
* tree-vect-loop.c (vect_create_epilog_for_reduction): Look
for the actual condition stmt and deal with sign-changes.
2019-11-19 Richard Biener <rguenther@suse.de>
PR tree-optimization/92555
* tree-vect-loop.c (vect_update_vf_for_slp): Also scan PHIs

7
gcc/testsuite/ChangeLog
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@ -1,4 +1,9 @@
2019-09-19 Richard Biener <rguenther@suse.de>
2019-11-19 Richard Biener <rguenther@suse.de>
PR tree-optimization/92554
* gcc.dg/vect/pr92554.c: New testcase.
2019-11-19 Richard Biener <rguenther@suse.de>
PR tree-optimization/92555
* gcc.dg/vect/pr92555.c: New testcase.

11
gcc/testsuite/gcc.dg/vect/pr92554.c Normal file
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@ -0,0 +1,11 @@
/* { dg-do compile } */
short int w9;
void __attribute__ ((simd))
zc (int in)
{
int va = 1;
w9 *= va != 0 ? in < 0 : 0;
}

32
gcc/tree-vect-loop.c
View File

@ -4552,12 +4552,21 @@ vect_create_epilog_for_reduction (stmt_vec_info stmt_info,
zeroes. */
if (STMT_VINFO_REDUC_TYPE (reduc_info) == COND_REDUCTION)
{
tree indx_before_incr, indx_after_incr;
poly_uint64 nunits_out = TYPE_VECTOR_SUBPARTS (vectype);
gimple *vec_stmt = STMT_VINFO_VEC_STMT (stmt_info)->stmt;
stmt_vec_info cond_info = STMT_VINFO_REDUC_DEF (reduc_info);
cond_info = vect_stmt_to_vectorize (cond_info);
while (gimple_assign_rhs_code (cond_info->stmt) != COND_EXPR)
{
cond_info
= loop_vinfo->lookup_def (gimple_op (cond_info->stmt,
1 + STMT_VINFO_REDUC_IDX
(cond_info)));
cond_info = vect_stmt_to_vectorize (cond_info);
}
gimple *vec_stmt = STMT_VINFO_VEC_STMT (cond_info)->stmt;
gcc_assert (gimple_assign_rhs_code (vec_stmt) == VEC_COND_EXPR);
tree indx_before_incr, indx_after_incr;
poly_uint64 nunits_out = TYPE_VECTOR_SUBPARTS (vectype);
int scalar_precision
= GET_MODE_PRECISION (SCALAR_TYPE_MODE (TREE_TYPE (vectype)));
tree cr_index_scalar_type = make_unsigned_type (scalar_precision);
@ -4611,9 +4620,9 @@ vect_create_epilog_for_reduction (stmt_vec_info stmt_info,
(CCOMPARE). The then and else values mirror the main VEC_COND_EXPR:
the reduction phi corresponds to NEW_PHI_TREE and the new values
correspond to INDEX_BEFORE_INCR. */
gcc_assert (STMT_VINFO_REDUC_IDX (stmt_info) >= 1);
gcc_assert (STMT_VINFO_REDUC_IDX (cond_info) >= 1);
tree index_cond_expr;
if (STMT_VINFO_REDUC_IDX (stmt_info) == 2)
if (STMT_VINFO_REDUC_IDX (cond_info) == 2)
index_cond_expr = build3 (VEC_COND_EXPR, cr_index_vector_type,
ccompare, indx_before_incr, new_phi_tree);
else
@ -4809,10 +4818,11 @@ vect_create_epilog_for_reduction (stmt_vec_info stmt_info,
be zero. */
/* Vector of {0, 0, 0,...}. */
tree zero_vec = make_ssa_name (vectype);
tree zero_vec_rhs = build_zero_cst (vectype);
gimple *zero_vec_stmt = gimple_build_assign (zero_vec, zero_vec_rhs);
gsi_insert_before (&exit_gsi, zero_vec_stmt, GSI_SAME_STMT);
tree zero_vec = build_zero_cst (vectype);
gimple_seq stmts = NULL;
new_phi_result = gimple_convert (&stmts, vectype, new_phi_result);
gsi_insert_seq_before (&exit_gsi, stmts, GSI_SAME_STMT);
/* Find maximum value from the vector of found indexes. */
tree max_index = make_ssa_name (index_scalar_type);
@ -4880,7 +4890,7 @@ vect_create_epilog_for_reduction (stmt_vec_info stmt_info,
/* Convert the reduced value back to the result type and set as the
result. */
gimple_seq stmts = NULL;
stmts = NULL;
new_temp = gimple_build (&stmts, VIEW_CONVERT_EXPR, scalar_type,
data_reduc);
gsi_insert_seq_before (&exit_gsi, stmts, GSI_SAME_STMT);