[Bug target/56513] New: Wrong code generation with -O3 on ARM

2013-03-03 Thread tim.ko...@filezilla-project.org 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56513



 Bug #: 56513

   Summary: Wrong code generation with -O3 on ARM

Classification: Unclassified

   Product: gcc

   Version: 4.7.2

Status: UNCONFIRMED

  Severity: normal

  Priority: P3

 Component: target

AssignedTo: unassig...@gcc.gnu.org

ReportedBy: tim.ko...@filezilla-project.org





Created attachment 29571

  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=29571

Small test program exhibiting the problem



If I'm cross-compiling the attached sample-program using gcc 4.7.2 for ARM on

an x86-64 system, the resulting binary behaves wrongly if -O3 is used.



Output with -O0:



value: -23

best:  -1

a: -68

value: -22

best:  -23

a: -23



Output with -O3:



value: -23

best:  -1

a: -68

value: -22

best:  -23

a: 65513

BUG

[Bug target/56513] Wrong code generation with -O3 on ARM

2013-03-03 Thread tim.ko...@filezilla-project.org 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56513



--- Comment #1 from Tim Kosse  2013-03-03 
18:47:18 UTC ---

Created attachment 29572

  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=29572

Preprocessed file



Created using the following command:

arm-unknown-linux-gnueabi-g++ -v -save-temps -O3 bug.cpp

[Bug target/56513] Wrong code generation with -O3 on ARM

2013-03-03 Thread tim.ko...@filezilla-project.org 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56513



--- Comment #2 from Tim Kosse  2013-03-03 
18:48:49 UTC ---

Created attachment 29573

  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=29573

Compiler output



Output of arm-unknown-linux-gnueabi-g++ -v -save-temps -O3 bug.cpp

[Bug target/56513] Wrong code generation with -O3 on ARM

2013-03-03 Thread tim.ko...@filezilla-project.org 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56513



--- Comment #3 from Tim Kosse  2013-03-03 
18:55:20 UTC ---

Also happens with GCC 4.7.1 and 4.6.3.