[gcc r17-2452] Avoid complex gimple_build API

https://gcc.gnu.org/g:70bc6136860c2d0da9ea4f3d62a9e4f01d45518b

commit r17-2452-g70bc6136860c2d0da9ea4f3d62a9e4f01d45518b
Author: Richard Biener <[email protected]>
Date:   Thu Jul 16 12:48:10 2026 +0200

    Avoid complex gimple_build API
    
    The following simplifies some gimple_build API use by using the
    available gimple_seq overloads.
    
            * tree-switch-conversion.cc (gen_log2): Use gimple_seq
            overload of gimple_build.
            (gen_pow2p): Likewise.

Diff:
---
 gcc/tree-switch-conversion.cc | 19 +++++++------------
 1 file changed, 7 insertions(+), 12 deletions(-)

diff --git a/gcc/tree-switch-conversion.cc b/gcc/tree-switch-conversion.cc
index 6fcb88f3ae05..f3e77647daae 100644
--- a/gcc/tree-switch-conversion.cc
+++ b/gcc/tree-switch-conversion.cc
@@ -117,18 +117,16 @@ static gimple_seq
 gen_log2 (tree op, location_t loc, tree *result, tree type)
 {
   gimple_seq stmts = NULL;
-  gimple_stmt_iterator gsi = gsi_last (stmts);
 
   tree orig_type = TREE_TYPE (op);
   tree tmp1;
   if (type != orig_type)
-    tmp1 = gimple_convert (&gsi, false, GSI_NEW_STMT, loc, type, op);
+    tmp1 = gimple_convert (&stmts, loc, type, op);
   else
     tmp1 = op;
   /* Build FFS (op) - 1.  */
-  tree tmp2 = gimple_build (&gsi, false, GSI_NEW_STMT, loc, IFN_FFS, orig_type,
-			    tmp1);
-  tree tmp3 = gimple_build (&gsi, false, GSI_NEW_STMT, loc, MINUS_EXPR,
+  tree tmp2 = gimple_build (&stmts, loc, IFN_FFS, orig_type, tmp1);
+  tree tmp3 = gimple_build (&stmts, loc, MINUS_EXPR,
 			    orig_type, tmp2, build_one_cst (orig_type));
   *result = tmp3;
   return stmts;
@@ -143,7 +141,6 @@ static gimple_seq
 gen_pow2p (tree op, location_t loc, tree *result)
 {
   gimple_seq stmts = NULL;
-  gimple_stmt_iterator gsi = gsi_last (stmts);
 
   tree type = TREE_TYPE (op);
   tree utype = unsigned_type_for (type);
@@ -153,13 +150,11 @@ gen_pow2p (tree op, location_t loc, tree *result)
   if (types_compatible_p (type, utype))
     tmp1 = op;
   else
-    tmp1 = gimple_convert (&gsi, false, GSI_NEW_STMT, loc, utype, op);
-  tree tmp2 = gimple_build (&gsi, false, GSI_NEW_STMT, loc, MINUS_EXPR, utype,
+    tmp1 = gimple_convert (&stmts, loc, utype, op);
+  tree tmp2 = gimple_build (&stmts, loc, MINUS_EXPR, utype,
 			    tmp1, build_one_cst (utype));
-  tree tmp3 = gimple_build (&gsi, false, GSI_NEW_STMT, loc, BIT_XOR_EXPR,
-			    utype, tmp1, tmp2);
-  *result = gimple_build (&gsi, false, GSI_NEW_STMT, loc, GT_EXPR,
-			  boolean_type_node, tmp3, tmp2);
+  tree tmp3 = gimple_build (&stmts, loc, BIT_XOR_EXPR, utype, tmp1, tmp2);
+  *result = gimple_build (&stmts, loc, GT_EXPR, boolean_type_node, tmp3, tmp2);
 
   return stmts;
 }