[gcc(refs/users/aoliva/heads/testme)] make -freg-struct-return visibly a negative alias of -fpcc-struct-return

[Alexandre Oliva <aoliva@gcc.gnu.org>]

https://gcc.gnu.org/g:60e63cf86f91608df32377f9ffc7c3f3e9f316fd

commit 60e63cf86f91608df32377f9ffc7c3f3e9f316fd
Author: Alexandre Oliva <oliva@adacore.com>
Date:   Tue Apr 23 00:33:04 2024 -0300

    make -freg-struct-return visibly a negative alias of -fpcc-struct-return
    
    The fact that both options accept negative forms suggests that maybe
    they aren't negative forms of each other.  They are, but that isn't
    clear even by examining common.opt.  Use NegativeAlias to make it
    abundantly clear.
    
    
    for  gcc/ChangeLog
    
            * common.opt (freg-struct-return): Make it explicitly
            fpcc-struct-return's NegativeAlias.

Diff:
---
 gcc/common.opt | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/gcc/common.opt b/gcc/common.opt
index ad348844775..12d93c76a1e 100644
--- a/gcc/common.opt
+++ b/gcc/common.opt
@@ -2406,7 +2406,7 @@ Common RejectNegative Joined UInteger Optimization
 -fpack-struct=<number>	Set initial maximum structure member alignment.
 
 fpcc-struct-return
-Common Var(flag_pcc_struct_return,1) Init(DEFAULT_PCC_STRUCT_RETURN)
+Common Var(flag_pcc_struct_return,1) Init(DEFAULT_PCC_STRUCT_RETURN) Optimization
 Return small aggregates in memory, not registers.
 
 fpeel-loops
@@ -2596,7 +2596,7 @@ Common Var(flag_record_gcc_switches)
 Record gcc command line switches in the object file.
 
 freg-struct-return
-Common Var(flag_pcc_struct_return,0) Optimization
+Common NegativeAlias Alias(fpcc_struct_return) Optimization
 Return small aggregates in registers.
 
 fregmove