[Bug target/56513] Wrong code generation with -O3 on ARM
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56513 --- Comment #6 from Mikael Pettersson mikpe at it dot uu.se 2013-03-04 13:24:04 UTC --- The wrong-code with -O3 -fno-tree-coalesce-vars stopped occurring at r190284, Richard Biener's large Allow anonymous SSA names patch. The patch description mentions minor code generation differences, but it doesn't appear to contain actual wrong code fixes so the underlying issue may still be latent on trunk.
[Bug target/56513] Wrong code generation with -O3 on ARM
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56513 --- Comment #1 from Tim Kosse tim.ko...@filezilla-project.org 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
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56513 --- Comment #2 from Tim Kosse tim.ko...@filezilla-project.org 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
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56513 --- Comment #3 from Tim Kosse tim.ko...@filezilla-project.org 2013-03-03 18:55:20 UTC --- Also happens with GCC 4.7.1 and 4.6.3.
[Bug target/56513] Wrong code generation with -O3 on ARM
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56513 Mikael Pettersson mikpe at it dot uu.se changed: What|Removed |Added CC||mikpe at it dot uu.se --- Comment #4 from Mikael Pettersson mikpe at it dot uu.se 2013-03-03 20:11:08 UTC --- I can reproduce the wrong-code on armv5tel-linux-gnueabi with gcc-4.7-20130302 and gcc-4.6-20121109, but not with gcc-4.8-20130224. I can't reproduce on x86_64, sparc64, aarch64, or m68k.
[Bug target/56513] Wrong code generation with -O3 on ARM
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56513 --- Comment #5 from Mikael Pettersson mikpe at it dot uu.se 2013-03-03 23:26:49 UTC --- The wrong-code stopped for 4.8 with r188526, the introduction and enabling of -ftree-coalesce-vars. At that point the wrong-code reappears with -O3 -fno-tree-coalesce-vars, however with current trunk those options give correct code. I'll investigate some more tomorrow.
