[gcc r9-9655] mips: Fix up mips_atomic_assign_expand_fenv [PR94780]

[Xi Ruoyao <xry111@gcc.gnu.org>]

https://gcc.gnu.org/g:79184d8c57d377a242610543a2cbe4f154924be7

commit r9-9655-g79184d8c57d377a242610543a2cbe4f154924be7
Author: Xi Ruoyao <xry111@mengyan1223.wang>
Date:   Fri Jul 30 23:44:14 2021 +0800

    mips: Fix up mips_atomic_assign_expand_fenv [PR94780]
    
    Commit message shamelessly copied from 1777beb6b129 by jakub:
    
    This function, because it is sometimes called even outside of function
    bodies, uses create_tmp_var_raw rather than create_tmp_var.  But in order
    for that to work, when first referenced, the VAR_DECLs need to appear in a
    TARGET_EXPR so that during gimplification the var gets the right
    DECL_CONTEXT and is added to local decls.
    
    gcc/
    
            PR target/94780
            * config/mips/mips.c (mips_atomic_assign_expand_fenv): Use
              TARGET_EXPR instead of MODIFY_EXPR.
    
    (cherry picked from commit 2065654435e3d97676366f82b939bc9273382dbe)

Diff:
---
 gcc/config/mips/mips.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/gcc/config/mips/mips.c b/gcc/config/mips/mips.c
index d758fbf1be6..1e3ea6b5f43 100644
--- a/gcc/config/mips/mips.c
+++ b/gcc/config/mips/mips.c
@@ -22370,12 +22370,12 @@ mips_atomic_assign_expand_fenv (tree *hold, tree *clear, tree *update)
   tree get_fcsr = mips_builtin_decls[MIPS_GET_FCSR];
   tree set_fcsr = mips_builtin_decls[MIPS_SET_FCSR];
   tree get_fcsr_hold_call = build_call_expr (get_fcsr, 0);
-  tree hold_assign_orig = build2 (MODIFY_EXPR, MIPS_ATYPE_USI,
-				  fcsr_orig_var, get_fcsr_hold_call);
+  tree hold_assign_orig = build4 (TARGET_EXPR, MIPS_ATYPE_USI,
+				  fcsr_orig_var, get_fcsr_hold_call, NULL, NULL);
   tree hold_mod_val = build2 (BIT_AND_EXPR, MIPS_ATYPE_USI, fcsr_orig_var,
 			      build_int_cst (MIPS_ATYPE_USI, 0xfffff003));
-  tree hold_assign_mod = build2 (MODIFY_EXPR, MIPS_ATYPE_USI,
-				 fcsr_mod_var, hold_mod_val);
+  tree hold_assign_mod = build4 (TARGET_EXPR, MIPS_ATYPE_USI,
+				 fcsr_mod_var, hold_mod_val, NULL, NULL);
   tree set_fcsr_hold_call = build_call_expr (set_fcsr, 1, fcsr_mod_var);
   tree hold_all = build2 (COMPOUND_EXPR, MIPS_ATYPE_USI,
 			  hold_assign_orig, hold_assign_mod);
@@ -22385,8 +22385,8 @@ mips_atomic_assign_expand_fenv (tree *hold, tree *clear, tree *update)
   *clear = build_call_expr (set_fcsr, 1, fcsr_mod_var);
 
   tree get_fcsr_update_call = build_call_expr (get_fcsr, 0);
-  *update = build2 (MODIFY_EXPR, MIPS_ATYPE_USI,
-		    exceptions_var, get_fcsr_update_call);
+  *update = build4 (TARGET_EXPR, MIPS_ATYPE_USI,
+		    exceptions_var, get_fcsr_update_call, NULL, NULL);
   tree set_fcsr_update_call = build_call_expr (set_fcsr, 1, fcsr_orig_var);
   *update = build2 (COMPOUND_EXPR, void_type_node, *update,
 		    set_fcsr_update_call);