https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81763
--- Comment #47 from Mike Lothian ---
With the patch you've committed to gcc master, applied on top of GCC 7.3 I'm
now seeing the following error building Clang:
[294/954] /usr/bin/x86_64-pc-linux-gnu-g++ -m32 -D_FILE_OFFSET_BITS=64
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81763
--- Comment #42 from Mike Lothian ---
With the patch in Comment 36 I get the following error compiling Clang
FAILED: lib/Lex/CMakeFiles/clangLex.dir/PPExpressions.cpp.o
/usr/bin/x86_64-pc-linux-gnu-g++ -m32 -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81763
--- Comment #39 from Mike Lothian ---
I can confirm it fixes things for me too.
Is that the final patch in Comment 36? If so I'll try and get the Gentoo devs
to include it in the GCC ebuilds
Will this be added to GCC 8.1 and 7.4?
Thanks
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81763
--- Comment #26 from Mike Lothian ---
Is this the patch you want us to test then:
diff -ur a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md
--- a/gcc/config/i386/i386.md 2018-01-16 11:17:49.509247000 +
+++ b/gcc/config/i386/i386.md
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81763
--- Comment #15 from Mike Lothian ---
Created attachment 43041
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=43041=edit
llvm-tblgen Working and Broken binaries
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81763
--- Comment #14 from Mike Lothian ---
I've been playing around with GCC 7.2.0 again
When compiling a 32bit LLVM with -O2 -march=native, llvm-tblgen runs
indefinitely during the build so it never completes
Doing the same with -O2 -march=native
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81763
--- Comment #12 from Mike Lothian ---
Created attachment 41960
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41960=edit
si_shader objdumps
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81763
--- Comment #11 from Mike Lothian ---
So a lot of the segfaults I see are in si_shader so I thought I'd compile Mesa
with and without BMI and compare the onjdumps of the two .o files
CFLAGS="-O2 -march=native -pipe -mno-bmi -m32" CXXFLAGS="-O2
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81763
--- Comment #10 from Mike Lothian ---
Unfortunately it also depends on LLVM not just Mesa which makes it a much
bigger target for figuring this out
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81763
--- Comment #6 from Mike Lothian ---
I tried the test case with
gcc -O2 -march=native test.c -o test
and
gcc -O2 -march=native -mno-bmi test.c -o test
Both executables seem to run with no output
I've only seen the issue in radeonsi in Mesa
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81763
--- Comment #3 from Mike Lothian ---
So dropping the -march=native allows everything to work again no matter which
version of GCC
Just using -mbmi breaks things and using -march=native -mno-bmi allows it all
to work
This is on a Skylake
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81763
--- Comment #2 from Mike Lothian ---
Sorry I should have been more clear, this is LLVM trunk
I'm using these flags:
CFLAGS="-O2 -march=native -pipe"
CXXFLAGS="-O2 -march=native -pipe"
LDFLAGS="-Wl,-O1 -Wl,--hash-style=gnu -Wl,--as-needed"
Assignee: unassigned at gcc dot gnu.org
Reporter: mike at fireburn dot co.uk
Target Milestone: ---
I've been seeing issues with 32bit x86 llvm & mesa when using GCC 7.1.0 and
I've just tested GCC 7.2 RC
When llvm & mesa are compiled with GCC 7.1.0+ and I run a 32bit
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