Re: [PATCH] C-SKY: Add -mbacktrace option.

[Jojo R]

Hi,

Ok & thanks, I will reroll this :)

Jojo
在 2020年8月26日 +0800 AM4:22，Jeff Law ，写道：
> On Fri, 2020-08-21 at 14:18 +0800, Jojo R wrote:
> > gcc/ChangeLog:
> >
> > * config/csky/csky.opt (TARGET_BACKTRACE): New.
> > * doc/invoke.texi (C-SKY Options): Document -mbacktrace.
> ISTM you need an actual implementation. All this does is add an option. It's
> impossible to know if this is a good idea without seeing implementation bits.
>
> jeff

Re: [PATCH] C-SKY: Add -mbacktrace option.

[Jeff Law via Gcc-patches]

On Fri, 2020-08-21 at 14:18 +0800, Jojo R wrote:
> gcc/ChangeLog:
> 
>   * config/csky/csky.opt (TARGET_BACKTRACE): New.
>   * doc/invoke.texi (C-SKY Options): Document -mbacktrace.
ISTM you need an actual implementation.  All this does is add an option.  It's
impossible to know if this is a good idea without seeing implementation bits.

jeff

[PATCH] C-SKY: Add -mbacktrace option.

[Jojo R]

gcc/ChangeLog:

* config/csky/csky.opt (TARGET_BACKTRACE): New.
* doc/invoke.texi (C-SKY Options): Document -mbacktrace.

---
 gcc/config/csky/csky.opt | 4 
 gcc/doc/invoke.texi  | 7 ++-
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/gcc/config/csky/csky.opt b/gcc/config/csky/csky.opt
index 60b51e5..00fa343 100644
--- a/gcc/config/csky/csky.opt
+++ b/gcc/config/csky/csky.opt
@@ -192,3 +192,7 @@ Set the branch costs to roughly the specified number of 
instructions.
 msched-prolog
 Target Report Var(flag_sched_prolog) Init(0)
 Permit scheduling of function prologue and epilogue sequences.
+
+mbacktrace
+Target Report Var(TARGET_BACKTRACE) Init(0) Undocumented
+Generate code can be backtraced.
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index 6352eab..41d0634 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -821,7 +821,7 @@ Objective-C and Objective-C++ Dialects}.
 -mdsp  -medsp  -mvdsp @gol
 -mdiv  -msmart  -mhigh-registers  -manchor @gol
 -mpushpop  -mmultiple-stld  -mconstpool  -mstack-size  -mccrt @gol
--mbranch-cost=@var{n}  -mcse-cc  -msched-prolog}
+-mbranch-cost=@var{n}  -mcse-cc  -msched-prolog -mbacktrace}
 
 @emph{Darwin Options}
 @gccoptlist{-all_load  -allowable_client  -arch  -arch_errors_fatal @gol
@@ -20434,6 +20434,11 @@ this option can result in code that is not compliant 
with the C-SKY V2 ABI
 prologue requirements and that cannot be debugged or backtraced.
 It is disabled by default.
 
+@item -mbacktrace
+@itemx -mno-backtrace
+@opindex mbacktrace
+Generate code can be backtraced.  This option defaults to off.
+
 @end table
 
 @node Darwin Options
-- 
1.9.1