about souce code location

[易会战]

how to check the location corresponding to a gimple statement? My instrument stmt include some memory access, I wish get right source code line. By context it is possible get wrong line.



---Original---
From: "Richard Biener"<richard.guenther@gmail.com>
Date: Fri, Sep 4, 2020 15:08 PM
To: "易会战"<huizhanyi@foxmail.com>;
Cc: "gcc"<gcc@gcc.gnu.org>;
Subject: Re: about souce code location


On Fri, Sep 4, 2020 at 2:23 AM 易会战 via Gcc <gcc@gcc.gnu.org> wrote:
>
> I am working a instrumention tool, and need get the location info for a gimple statement. I use the location structure to get the info, and it can work when i use -O1. When I use -O2, sometimes the info seems to be lost and I get line num is zero.&nbsp; anyone can tell me how to get the info?

Not all statements have a location, if you encounter such you need to
look at the "surrounding context"
to find one.