[gcc r16-6146] ifcombine: Replace force_gimple_operand_gsi with gimple_build [PR122987]

[Pengxuan Zheng]

https://gcc.gnu.org/g:39681504b2fcdcbbb9424383524575283511fe00

commit r16-6146-g39681504b2fcdcbbb9424383524575283511fe00
Author: Pengxuan Zheng <pengxuan.zheng@oss.qualcomm.com>
Date:   Thu Dec 11 12:18:32 2025 -0800

    ifcombine: Replace force_gimple_operand_gsi with gimple_build [PR122987]
    
    This makes the code a little cleaner and might speed up the compiler slightly.
    
    Bootstrapped and tested on x86_64 and aarch64.
    
            PR tree-optimization/122987
    
    gcc/ChangeLog:
    
            * tree-ssa-ifcombine.cc (ifcombine_ifandif): Replace
            force_gimple_operand_gsi with gimple_build.
    
    Signed-off-by: Pengxuan Zheng <pengxuan.zheng@oss.qualcomm.com>

Diff:
---
 gcc/tree-ssa-ifcombine.cc | 22 ++++++++++++----------
 1 file changed, 12 insertions(+), 10 deletions(-)

diff --git a/gcc/tree-ssa-ifcombine.cc b/gcc/tree-ssa-ifcombine.cc
index 1fff92341982..2642cc10fb16 100644
--- a/gcc/tree-ssa-ifcombine.cc
+++ b/gcc/tree-ssa-ifcombine.cc
@@ -834,16 +834,18 @@ ifcombine_ifandif (basic_block inner_cond_bb, bool inner_inv,
 
       /* Do it.  */
       gsi = gsi_for_stmt (inner_cond);
-      t = fold_build2 (LSHIFT_EXPR, TREE_TYPE (name1),
-		       build_int_cst (TREE_TYPE (name1), 1), bit1);
-      t2 = fold_build2 (LSHIFT_EXPR, TREE_TYPE (name1),
-		        build_int_cst (TREE_TYPE (name1), 1), bit2);
-      t = fold_build2 (BIT_IOR_EXPR, TREE_TYPE (name1), t, t2);
-      t = force_gimple_operand_gsi (&gsi, t, true, NULL_TREE,
-				    true, GSI_SAME_STMT);
-      t2 = fold_build2 (BIT_AND_EXPR, TREE_TYPE (name1), name1, t);
-      t2 = force_gimple_operand_gsi (&gsi, t2, true, NULL_TREE,
-				     true, GSI_SAME_STMT);
+      location_t loc1 = gimple_location (inner_cond);
+      location_t loc2 = gimple_location (outer_cond);
+      t = gimple_build (&gsi, true, GSI_SAME_STMT, loc1, LSHIFT_EXPR,
+			TREE_TYPE (name1),
+			build_int_cst (TREE_TYPE (name1), 1), bit1);
+      t2 = gimple_build (&gsi, true, GSI_SAME_STMT, loc2, LSHIFT_EXPR,
+			 TREE_TYPE (name1),
+			 build_int_cst (TREE_TYPE (name1), 1), bit2);
+      t = gimple_build (&gsi, true, GSI_SAME_STMT, loc1, BIT_IOR_EXPR,
+			TREE_TYPE (name1), t, t2);
+      t2 = gimple_build (&gsi, true, GSI_SAME_STMT, loc1, BIT_AND_EXPR,
+			 TREE_TYPE (name1), name1, t);
 
       t = fold_build2 (EQ_EXPR, boolean_type_node, t2, t);