OPTIONS_EXCLUDE_powerpc64=	BOOTSTRAP

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=239266 reports how

clang unfortunately poisons user namespace by default (without any

special options), so we need to avoid using vec_step as a variable.

Index: gcc/tree-vect-loop.c

===================================================================

--- gcc/tree-vect-loop.c	(revision 273856)

+++ gcc/tree-vect-loop.c	(working copy)

@@ -55,6 +55,8 @@ along with GCC; see the file COPYING3.  If not see

 #include "vec-perm-indices.h"

 #include "tree-eh.h"

+#define vec_step vec_step_

+

 /* Loop Vectorization Pass.

    This pass tries to vectorize loops.

r274105 | amodra | 2019-08-05 01:52:33 +0000

PR91349, powerpc64*-*-freebsd* defines _GNU_SOURCE

rev 266496 (git ab6b1bb456) undefined some macros in rs6000/freebsd.h

but missed doing the same in rs6000/freebsd64.h.

        PR target/91349

        * config/rs6000/freebsd64.h (CPLUSPLUS_CPP_SPEC),

        (LINK_GCC_C_SEQUENCE_SPEC): Undef.

--- gcc/config/rs6000/freebsd64.h.orig	2019-03-11 13:58:44 UTC

+++ gcc/config/rs6000/freebsd64.h

@@ -65,6 +65,8 @@ extern int dot_symbols;

 #define INVALID_64BIT "-m%s not supported in this configuration"

 #define INVALID_32BIT INVALID_64BIT

+#define LINUX64_DEFAULT_ABI_ELFv2

+

 /* Use LINUX64 instead of FREEBSD64 for compat with e.g. sysv4le.h */

 #ifdef LINUX64_DEFAULT_ABI_ELFv2

 #define ELFv2_ABI_CHECK (rs6000_elf_abi != 1)

--- gcc/tree-vect-loop.c.orig	2019-08-13 09:28:03 UTC

+++ gcc/tree-vect-loop.c

@@ -4568,13 +4568,13 @@ vect_create_epilog_for_reduction (vec<tr

       /* Create a vector of the step value.  */

       tree step = build_int_cst (cr_index_scalar_type, nunits_out);

-      tree vec_step = build_vector_from_val (cr_index_vector_type, step);

+      tree vec_step_renamed = build_vector_from_val (cr_index_vector_type, step);

       /* Create an induction variable.  */

       gimple_stmt_iterator incr_gsi;

       bool insert_after;

       standard_iv_increment_position (loop, &incr_gsi, &insert_after);

-      create_iv (series_vect, vec_step, NULL_TREE, loop, &incr_gsi,

+      create_iv (series_vect, vec_step_renamed, NULL_TREE, loop, &incr_gsi,

 		 insert_after, &indx_before_incr, &indx_after_incr);

       /* Next create a new phi node vector (NEW_PHI_TREE) which starts

@@ -7230,7 +7230,7 @@ vectorizable_induction (stmt_vec_info st

   tree vec_def;

   edge pe = loop_preheader_edge (loop);

   basic_block new_bb;

-  tree new_vec, vec_init, vec_step, t;

+  tree new_vec, vec_init, vec_step_renamed, t;

   tree new_name;

   gimple *new_stmt;

   gphi *induction_phi;

@@ -7422,7 +7422,7 @@ vectorizable_induction (stmt_vec_info st

 	new_name = vect_init_vector (stmt_info, new_name,

 				     TREE_TYPE (step_expr), NULL);

       new_vec = build_vector_from_val (vectype, new_name);

-      vec_step = vect_init_vector (stmt_info, new_vec, vectype, NULL);

+      vec_step_renamed = vect_init_vector (stmt_info, new_vec, vectype, NULL);

       /* Now generate the IVs.  */

       unsigned group_size = SLP_TREE_SCALAR_STMTS (slp_node).length ();

@@ -7461,7 +7461,7 @@ vectorizable_induction (stmt_vec_info st

 	  /* Create the iv update inside the loop  */

 	  vec_def = make_ssa_name (vec_dest);

-	  new_stmt = gimple_build_assign (vec_def, PLUS_EXPR, induc_def, vec_step);

+	  new_stmt = gimple_build_assign (vec_def, PLUS_EXPR, induc_def, vec_step_renamed);

 	  gsi_insert_before (&si, new_stmt, GSI_SAME_STMT);

 	  loop_vinfo->add_stmt (new_stmt);

@@ -7492,7 +7492,7 @@ vectorizable_induction (stmt_vec_info st

 	    new_name = vect_init_vector (stmt_info, new_name,

 					 TREE_TYPE (step_expr), NULL);

 	  new_vec = build_vector_from_val (vectype, new_name);

-	  vec_step = vect_init_vector (stmt_info, new_vec, vectype, NULL);

+	  vec_step_renamed = vect_init_vector (stmt_info, new_vec, vectype, NULL);

 	  for (; ivn < nvects; ++ivn)

 	    {

 	      gimple *iv = SLP_TREE_VEC_STMTS (slp_node)[ivn - nivs]->stmt;

@@ -7503,7 +7503,7 @@ vectorizable_induction (stmt_vec_info st

 		def = gimple_assign_lhs (iv);

 	      new_stmt = gimple_build_assign (make_ssa_name (vectype),

 					      PLUS_EXPR,

-					      def, vec_step);

+					      def, vec_step_renamed);

 	      if (gimple_code (iv) == GIMPLE_PHI)

 		gsi_insert_before (&si, new_stmt, GSI_SAME_STMT);

 	      else

@@ -7627,7 +7627,7 @@ vectorizable_induction (stmt_vec_info st

   gcc_assert (CONSTANT_CLASS_P (new_name)

 	      || TREE_CODE (new_name) == SSA_NAME);

   new_vec = build_vector_from_val (vectype, t);

-  vec_step = vect_init_vector (stmt_info, new_vec, vectype, NULL);

+  vec_step_renamed = vect_init_vector (stmt_info, new_vec, vectype, NULL);

   /* Create the following def-use cycle:

@@ -7649,7 +7649,7 @@ vectorizable_induction (stmt_vec_info st

   /* Create the iv update inside the loop  */

   vec_def = make_ssa_name (vec_dest);

-  new_stmt = gimple_build_assign (vec_def, PLUS_EXPR, induc_def, vec_step);

+  new_stmt = gimple_build_assign (vec_def, PLUS_EXPR, induc_def, vec_step_renamed);

   gsi_insert_before (&si, new_stmt, GSI_SAME_STMT);

   stmt_vec_info new_stmt_info = loop_vinfo->add_stmt (new_stmt);

@@ -7693,7 +7693,7 @@ vectorizable_induction (stmt_vec_info st

       gcc_assert (CONSTANT_CLASS_P (new_name)

 		  || TREE_CODE (new_name) == SSA_NAME);

       new_vec = build_vector_from_val (vectype, t);

-      vec_step = vect_init_vector (stmt_info, new_vec, vectype, NULL);

+      vec_step_renamed = vect_init_vector (stmt_info, new_vec, vectype, NULL);

       vec_def = induc_def;

       prev_stmt_vinfo = induction_phi_info;

@@ -7701,7 +7701,7 @@ vectorizable_induction (stmt_vec_info st

 	{

 	  /* vec_i = vec_prev + vec_step  */

 	  new_stmt = gimple_build_assign (vec_dest, PLUS_EXPR,

-					  vec_def, vec_step);

+					  vec_def, vec_step_renamed);

 	  vec_def = make_ssa_name (vec_dest, new_stmt);

 	  gimple_assign_set_lhs (new_stmt, vec_def);