[Bug target/77686] New: [6/7 Regression] wrong code on arm-linux-gnueabi and arm-linux-gnueabihf
doko at gcc dot gnu.org
gcc-bugzilla@gcc.gnu.org
Thu Sep 22 09:06:00 GMT 2016
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77686
Bug ID: 77686
Summary: [6/7 Regression] wrong code on arm-linux-gnueabi and
arm-linux-gnueabihf
Product: gcc
Version: 6.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: doko at gcc dot gnu.org
Target Milestone: ---
[forwarded from https://bugs.debian.org/838438]
seen with gcc-6 20160915 and trunk 20160902 (rechecking with newer version),
works with g++-5 with -O2, with -O1/-O0 everywhere.
---------------------------8<--------------------------
(sid_armhf-dchroot)jackyf@harris:~/smalltests/small-std-function-arm$ cat
hm.cpp
#include <iostream>
#include <functional>
struct C
{
void doCb()
{
size_t dummy_a = 1;
std::cout << "Outside: " << this << std::endl;
std::function<void ()> f;
f = [this, &dummy_a]()
{};
f = [this]()
{
std::cout << "Inside: " << this << std::endl;
};
f();
}
};
int main()
{
C c;
c.doCb();
}
$ g++ -O2 -Wall -Wextra hm.cpp && ./a.out
Outside: 0xffa74b30
Inside: 0xf7356195
$ g++ -O1 -Wall -Wextra hm.cpp && ./a.out
Outside: 0xff7f0300
Inside: 0xff7f0300
gcc configured with -with-arch=armv7-a --with-fpu=vfpv3-d16 --with-float=hard
--with-mode=thumb
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