[Bug tree-optimization/107066] Field initialized before ctor is mis-optimized away by DSE

[fxue at os dot amperecomputing.com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107066

--- Comment #3 from Feng Xue  ---
Got it. Thanks for that.

[Bug tree-optimization/107066] Field initialized before ctor is mis-optimized away by DSE

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107066

--- Comment #2 from Andrew Pinski  ---
See https://gcc.gnu.org/gcc-6/porting_to.html#flifetime-dse also. Which
documented when the change happened back in GCC 6.

[Bug tree-optimization/107066] Field initialized before ctor is mis-optimized away by DSE

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107066

Andrew Pinski  changed:

   What|Removed |Added

 Resolution|--- |INVALID
 Status|UNCONFIRMED |RESOLVED

--- Comment #1 from Andrew Pinski  ---
You need -fno-lifetime-dse as documented

https://gcc.gnu.org/onlinedocs/gcc-12.2.0/gcc/Optimize-Options.html#index-flifetime-dse

C++ is defined this way otherwise.