[binutils-gdb] gas: sframe: improve code comments around SFRAME_FRE_BASE_REG_INVAL

[Indu Bhagat]

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=2445d240d18f89191d8b1fd4f30cb9fcd4c480c3

commit 2445d240d18f89191d8b1fd4f30cb9fcd4c480c3
Author: Indu Bhagat <indu.bhagat@oracle.com>
Date:   Sun Nov 2 23:41:04 2025 -0800

    gas: sframe: improve code comments around SFRAME_FRE_BASE_REG_INVAL
    
    Rename it to SFRAME_FRE_REG_INVALID.
    
    gas/
            * gen-sframe.c (sframe_row_entry_new): Adjust code comments a
            bit.
            * gen-sframe.h (SFRAME_FRE_BASE_REG_INVAL): Rename from..
            (SFRAME_FRE_REG_INVALID): ..to this.

Diff:
---
 gas/gen-sframe.c | 6 +++---
 gas/gen-sframe.h | 3 ++-
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/gas/gen-sframe.c b/gas/gen-sframe.c
index b1aa8072410..3ac1cf4338c 100644
--- a/gas/gen-sframe.c
+++ b/gas/gen-sframe.c
@@ -504,9 +504,9 @@ static struct sframe_row_entry*
 sframe_row_entry_new (void)
 {
   struct sframe_row_entry *fre = XCNEW (struct sframe_row_entry);
-  /* Reset cfa_base_reg to -1.  A value of 0 will imply some valid register
-     for the supported arches.  */
-  fre->cfa_base_reg = SFRAME_FRE_BASE_REG_INVAL;
+  /* Reset cfa_base_reg to SFRAME_FRE_REG_INVALID.  A value of 0 may imply a
+     valid register for a supported arch.  */
+  fre->cfa_base_reg = SFRAME_FRE_REG_INVALID;
   fre->merge_candidate = true;
   /* Reset the mangled RA status bit to zero by default.  We will
      initialize it in sframe_row_entry_initialize () with the sticky
diff --git a/gas/gen-sframe.h b/gas/gen-sframe.h
index cf9f5987bf5..d5cad324da6 100644
--- a/gas/gen-sframe.h
+++ b/gas/gen-sframe.h
@@ -34,7 +34,8 @@
 #define SFRAME_FRE_ELEM_LOC_REG		0
 #define SFRAME_FRE_ELEM_LOC_STACK	1
 
-#define SFRAME_FRE_BASE_REG_INVAL	((unsigned int)-1)
+/* An invalid register number.  */
+#define SFRAME_FRE_REG_INVALID		((unsigned int)-1)
 
 /* SFrame Frame Row Entry (FRE).