From: Simon Marchi <simon.marchi@efficios.com>
Date: Thu, 23 Feb 2023 17:35:41 +0000 (-0500)
Subject: gdb: fix -Wsingle-bit-bitfield-constant-conversion warning in z80-tdep.c
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=07f285934886016ddd82cac99a3873e68b499d5c;p=binutils-gdb.git

gdb: fix -Wsingle-bit-bitfield-constant-conversion warning in z80-tdep.c

When building with clang 16, I see:

    /home/smarchi/src/binutils-gdb/gdb/z80-tdep.c:338:32: error: implicit truncation from 'int' to a one-bit wide bit-field changes value from 1 to -1 [-Werror,-Wsingle-bit-bitfield-constant-conversion]
            info->prologue_type.load_args = 1;
                                          ^ ~
    /home/smarchi/src/binutils-gdb/gdb/z80-tdep.c:345:36: error: implicit truncation from 'int' to a one-bit wide bit-field changes value from 1 to -1 [-Werror,-Wsingle-bit-bitfield-constant-conversion]
          info->prologue_type.critical = 1;
                                       ^ ~
    /home/smarchi/src/binutils-gdb/gdb/z80-tdep.c:351:37: error: implicit truncation from 'int' to a one-bit wide bit-field changes value from 1 to -1 [-Werror,-Wsingle-bit-bitfield-constant-conversion]
          info->prologue_type.interrupt = 1;
                                        ^ ~
    /home/smarchi/src/binutils-gdb/gdb/z80-tdep.c:367:36: error: implicit truncation from 'int' to a one-bit wide bit-field changes value from 1 to -1 [-Werror,-Wsingle-bit-bitfield-constant-conversion]
                  info->prologue_type.fp_sdcc = 1;
                                              ^ ~
    /home/smarchi/src/binutils-gdb/gdb/z80-tdep.c:375:35: error: implicit truncation from 'int' to a one-bit wide bit-field changes value from 1 to -1 [-Werror,-Wsingle-bit-bitfield-constant-conversion]
          info->prologue_type.fp_sdcc = 1;
                                      ^ ~
    /home/smarchi/src/binutils-gdb/gdb/z80-tdep.c:380:35: error: implicit truncation from 'int' to a one-bit wide bit-field changes value from 1 to -1 [-Werror,-Wsingle-bit-bitfield-constant-conversion]
          info->prologue_type.fp_sdcc = 1;
                                      ^ ~

Fix that by using "unsigned int" as the bitfield's underlying type.

Change-Id: I3550a0112f993865dc70b18f02ab11bb5012693d
---

diff --git a/gdb/z80-tdep.c b/gdb/z80-tdep.c
index 9dc24df5ed1..5c66331efcd 100644
--- a/gdb/z80-tdep.c
+++ b/gdb/z80-tdep.c
@@ -98,11 +98,11 @@ struct z80_unwind_cache
 
   struct
   {
-    int called:1;	/* there is return address on stack */
-    int load_args:1;	/* prologues loads args using POPs */
-    int fp_sdcc:1;	/* prologue saves and adjusts frame pointer IX */
-    int interrupt:1;	/* __interrupt handler */
-    int critical:1;	/* __critical function */
+    unsigned int called : 1;    /* there is return address on stack */
+    unsigned int load_args : 1; /* prologues loads args using POPs */
+    unsigned int fp_sdcc : 1;   /* prologue saves and adjusts frame pointer IX */
+    unsigned int interrupt : 1; /* __interrupt handler */
+    unsigned int critical : 1;  /* __critical function */
   } prologue_type;
 
   /* Table indicating the location of each and every register.  */