From: Jeff Law <jeffreyalaw@gmail.com>
To: Jan-Benedict Glaw <jbglaw@lug-owl.de>
Cc: "gcc-patches@gcc.gnu.org" <gcc-patches@gcc.gnu.org>
Subject: Re: [committed] More infrastructure to avoid bogus RTL on H8
Date: Fri, 28 Oct 2022 21:35:48 -0600 [thread overview]
Message-ID: <025493a0-2924-a05c-7d1f-3bbe8c24b5dc@gmail.com> (raw)
In-Reply-To: <20221025195906.rk5wx6ttpwohwn4p@lug-owl.de>
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On 10/25/22 13:59, Jan-Benedict Glaw wrote:
> Hi Jeff!
>
> On Mon, 2022-10-17 17:47:16 -0600, Jeff Law via Gcc-patches <gcc-patches@gcc.gnu.org> wrote:
>> --- a/gcc/config/h8300/h8300.cc
>> +++ b/gcc/config/h8300/h8300.cc
>> @@ -5531,6 +5531,32 @@ h8300_ok_for_sibcall_p (tree fndecl, tree)
>>
>> return 1;
>> }
>> +
>> +/* Return TRUE if OP is a PRE_INC or PRE_DEC
>> + instruction using REG, FALSE otherwise. */
>> +
>> +bool
>> +pre_incdec_with_reg (rtx op, int reg)
>> +{
>> + /* OP must be a MEM. */
>> + if (GET_CODE (op) != MEM)
>> + return false;
>> +
>> + /* The address must be a PRE_INC or PRE_DEC. */
>> + op = XEXP (op, 0);
>> + if (GET_CODE (op) != PRE_DEC && GET_CODE (op) != PRE_INC)
>> + return false;
>> +
>> + /* It must be a register that is being incremented
>> + or decremented. */
>> + op = XEXP (op, 0);
>> + if (!REG_P (op))
>> + return false;
>> +
>> + /* Finally, check that the register number matches. */
>> + return REGNO (op) == reg;
> This results in a new signed-vs-unsigned warning for me:
>
> [all 2022-10-25 00:41:11] ../../gcc/gcc/config/h8300/h8300.cc: In function 'bool pre_incdec_with_reg(rtx, int)':
> [all 2022-10-25 00:41:11] ../../gcc/gcc/config/h8300/h8300.cc:5557:21: error: comparison of integer expressions of different signedness: 'unsigned int' and 'int' [-Werror=sign-compare]
> [all 2022-10-25 00:41:11] 5557 | return REGNO (op) == reg;
Fixed via the attached patch. Thanks for pointing it out.
jeff
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commit 724d3f926b94672de960dbe88fb699bbdd7fde97
Author: Jeff Law <jeffreyalaw@gmail.com>
Date: Fri Oct 28 23:33:06 2022 -0400
Fix signed vs unsigned issue in H8 port
gcc/
* config/h8300/h8300.cc (pre_incdec_with_reg): Make reg argument
an unsigned int
* config/h8300/h8300-protos.h (pre_incdec_with_reg): Adjust prototype.
diff --git a/gcc/config/h8300/h8300-protos.h b/gcc/config/h8300/h8300-protos.h
index 8c989495c29..77adfaba07b 100644
--- a/gcc/config/h8300/h8300-protos.h
+++ b/gcc/config/h8300/h8300-protos.h
@@ -100,7 +100,7 @@ extern int h8300_initial_elimination_offset (int, int);
extern int h8300_regs_ok_for_stm (int, rtx[]);
extern int h8300_hard_regno_rename_ok (unsigned int, unsigned int);
extern bool h8300_move_ok (rtx, rtx);
-extern bool pre_incdec_with_reg (rtx, int);
+extern bool pre_incdec_with_reg (rtx, unsigned int);
struct cpp_reader;
extern void h8300_pr_interrupt (struct cpp_reader *);
diff --git a/gcc/config/h8300/h8300.cc b/gcc/config/h8300/h8300.cc
index ce0702edecb..cd7975e2fff 100644
--- a/gcc/config/h8300/h8300.cc
+++ b/gcc/config/h8300/h8300.cc
@@ -5536,7 +5536,7 @@ h8300_ok_for_sibcall_p (tree fndecl, tree)
instruction using REG, FALSE otherwise. */
bool
-pre_incdec_with_reg (rtx op, int reg)
+pre_incdec_with_reg (rtx op, unsigned int reg)
{
/* OP must be a MEM. */
if (GET_CODE (op) != MEM)
prev parent reply other threads:[~2022-10-29 3:35 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-17 23:47 Jeff Law
2022-10-25 19:59 ` Jan-Benedict Glaw
2022-10-29 3:35 ` Jeff Law [this message]
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