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Re: [PATCH] Combine location with block using block_locations

From: Robert Dewar <dewar at adacore dot com>
To: Xinliang David Li <davidxl at google dot com>
Cc: Richard Guenther <richard dot guenther at gmail dot com>, Dehao Chen <dehao at google dot com>, Michael Matz <matz at suse dot de>, Diego Novillo <dnovillo at google dot com>, Dodji Seketeli <dodji at redhat dot com>, GCC Patches <gcc-patches at gcc dot gnu dot org>, Jakub Jelinek <jakub at redhat dot com>, Jan Hubicka <hubicka at ucw dot cz>, Tom Tromey <tromey at redhat dot com>, Jason Merrill <jason at redhat dot com>, Richard Henderson <rth at redhat dot com>
Date: Thu, 13 Sep 2012 12:29:29 -0400
Subject: Re: [PATCH] Combine location with block using block_locations
References: <CAO2gOZXFkCpuFqXpPw6ju14BB=RBdt-kDhKsJgk4N41=Q19VHw@mail.gmail.com> <CAO2gOZVNK5uS7NJt1uV6S7nCMtoj+g23BJiH_=P6TLgkh4d1Sw@mail.gmail.com> <CAFiYyc1pA9+=_OE50rCSmKG4ftasrNYE8jRMt3gf_F+6ee9OVw@mail.gmail.com> <alpine.LNX.2.00.1209111500200.9940@wotan.suse.de> <CAFiYyc0vM+LZJ_6MRFud9c1LhyFsu2jf-E38FuDryoMo5G7iYw@mail.gmail.com> <CAO2gOZV8SP-sOVEJBEsvF+M3yiKwtw7yWarfhZ1xeCVYjE_7KA@mail.gmail.com> <CAO2gOZU0v3TeuLDLN02OCVPOht7JYg+tGU=UEJEdN_42fGFsTw@mail.gmail.com> <CAO2gOZWkn99pRrdp=0YjujpJvdtWXXq7LTRghU1+Ujq7E1ZoXg@mail.gmail.com> <CAFiYyc1Jb0ya49ny17c83sok_t3J4M9oN-K0G5-yTP=a+EVkwA@mail.gmail.com> <CAAkRFZ+CX3475JCSzqTspfqhkH363VJLUE1OVq5gsDrFpudu4w@mail.gmail.com> <CAO2gOZWMwDGLXXZ1oyd5Hiqvb9uJmUs+ZLAzhEanyvaF8Lvj=w@mail.gmail.com> <CAO2gOZWKDceuDo_pdxvn4-9o0SdEvaNSVHjJ-sJwp56GqnD=oA@mail.gmail.com> <CAFiYyc2te+pKYOzYV1aGusQB=R_onBAa+LeQ=muZUxgmOA0CSA@mail.gmail.com> <5051E0A0.4050702@adacore.com> <CAAkRFZJki4seypJyO2m904zia9Sm+GUWdfqLdDQnFQxMZP_hQg@mail.gmail.com>

On 9/13/2012 12:07 PM, Xinliang David Li wrote:

It is very important to make sure -g does not affect code gen ---
people do release build with -g with optimization, and strip the
binary before sending it to production machines ..


Yes, of course, and for sure -g cannot affect optimized code, see
my follow on message.

David

On Thu, Sep 13, 2012 at 6:33 AM, Robert Dewar <dewar@adacore.com> wrote:
On 9/13/2012 8:00 AM, Richard Guenther wrote:

Because doing so would create code generation differences -g vs. -g0.
Sometimes I wonder whether the insistence on -g not changing code
generation is warranted. In practice, gdb for me is so weak in handling
-O1 or -O2, that if I want to debug something I have to recompile
with -O0 -g, which causes quite a bit of code generation change :-)

References:
- Re: [PATCH] Combine location with block using block_locations
  - From: Dehao Chen
- Re: [PATCH] Combine location with block using block_locations
  - From: Richard Guenther
- Re: [PATCH] Combine location with block using block_locations
  - From: Michael Matz
- Re: [PATCH] Combine location with block using block_locations
  - From: Richard Guenther
- Re: [PATCH] Combine location with block using block_locations
  - From: Dehao Chen
- Re: [PATCH] Combine location with block using block_locations
  - From: Dehao Chen
- Re: [PATCH] Combine location with block using block_locations
  - From: Richard Guenther
- Re: [PATCH] Combine location with block using block_locations
  - From: Xinliang David Li
- Re: [PATCH] Combine location with block using block_locations
  - From: Dehao Chen
- Re: [PATCH] Combine location with block using block_locations
  - From: Dehao Chen
- Re: [PATCH] Combine location with block using block_locations
  - From: Richard Guenther
- Re: [PATCH] Combine location with block using block_locations
  - From: Robert Dewar
- Re: [PATCH] Combine location with block using block_locations
  - From: Xinliang David Li

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