Your message dated Wed, 21 Aug 2013 21:54:07 +0000
with message-id <[email protected]>
and subject line Bug#706706: Removed package(s) from unstable
has caused the Debian Bug report #704855,
regarding llvm-3.0: does not detect Core i7 Ivy Bridge CPU, causing clang
-march=native -m64 to fall back to unsupported i686 instead of x86-64
to be marked as done.
This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.
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--
704855: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=704855
Debian Bug Tracking System
Contact [email protected] with problems
--- Begin Message ---
Package: llvm-3.0
Version: 3.0-10
Severity: normal
Tags: patch
Hi,
clang 3.0 fails with -march=native on an Core i7 Ivy Bridge CPU on [amd64]:
# clang -c -v -march=native /tmp/x.c -m64
Debian clang version 3.0-6.1 (tags/RELEASE_30/final) (based on LLVM 3.0)
Target: x86_64-pc-linux-gnu
Thread model: posix
"/usr/bin/clang" -cc1 -triple x86_64-pc-linux-gnu -emit-obj -mrelax-all
-disable-free -disable-llvm-verifier -main-file-name x.c
-mrelocation-model static -mdisable-fp-elim -masm-verbose
-mconstructor-aliases -munwind-tables -target-cpu i686
-target-linker-version 2.22 -momit-leaf-frame-pointer -v -coverage-file
x.o -resource-dir /usr/bin/../lib/clang/3.0 -fmodule-cache-path
/var/tmp/clang-module-cache -internal-isystem /usr/local/include
-internal-isystem /usr/bin/../lib/clang/3.0/include
-internal-externc-isystem /usr/include/x86_64-linux-gnu
-internal-externc-isystem /usr/include -ferror-limit 19
-fmessage-length 194 -fgnu-runtime -fobjc-runtime-has-arc
-fobjc-runtime-has-weak -fobjc-fragile-abi -fdiagnostics-show-option
-fcolor-diagnostics -o x.o -x c /tmp/x.c
error: unknown target CPU 'i686'
Hmm, well, that one only exists for -m32.
# cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 58
model name : Intel(R) Core(TM) i7-3770 CPU @ 3.40GHz
stepping : 9
microcode : 0x12
...
I cherry-picked a few patches from llvm-3.2 from their git-svn repository
that
* add detection for a few newer CPUs
* use a default for unknown CPUs that takes into account whether the CPU
is 64-bit capable, so this would fall back to -march=x86-64 which
would actually work.
After applying these patches to llvm-3.0 clang-3.0 started to behave
sane again. (But due to lack of AVX support I'll have to move to
llvm-3.2/clang-3.2 anyway.)
If help is needed, I could take care of a NMU and try to get this
unblocked for wheezy.
Andreas
--
------------------------------------------------------------------------------------------------
------------------------------------------------------------------------------------------------
Forschungszentrum Juelich GmbH
52425 Juelich
Sitz der Gesellschaft: Juelich
Eingetragen im Handelsregister des Amtsgerichts Dueren Nr. HR B 3498
Vorsitzender des Aufsichtsrats: MinDir Dr. Karl Eugen Huthmacher
Geschaeftsfuehrung: Prof. Dr. Achim Bachem (Vorsitzender),
Karsten Beneke (stellv. Vorsitzender), Prof. Dr.-Ing. Harald Bolt,
Prof. Dr. Sebastian M. Schmidt
------------------------------------------------------------------------------------------------
------------------------------------------------------------------------------------------------
>From aff59685a9ff59edb525a1be2120e9d0206f3bb8 Mon Sep 17 00:00:00 2001
From: Evan Cheng <[email protected]>
Date: Mon, 23 Apr 2012 22:41:39 +0000
Subject: [PATCH] Add a missing cpu subtype.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@155402 91177308-0d34-0410-b5e6-96231b3b80d8
---
lib/Support/Host.cpp | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/lib/Support/Host.cpp b/lib/Support/Host.cpp
index 0f06964..a5e0cb0 100644
--- a/lib/Support/Host.cpp
+++ b/lib/Support/Host.cpp
@@ -230,6 +230,10 @@ std::string sys::getHostCPUName() {
case 45:
return "corei7-avx";
+ // Ivy Bridge:
+ case 58:
+ return "core-avx-i";
+
case 28: // Intel Atom processor. All processors are manufactured using
// the 45 nm process
return "atom";
--
1.7.10.4
>From 0d38d3a0005c60f721899475902026a91ef65fad Mon Sep 17 00:00:00 2001
From: Bob Wilson <[email protected]>
Date: Wed, 9 May 2012 17:47:03 +0000
Subject: [PATCH] Use the cpuid 64 bit flag to pick the default CPU name for
an unknown model.
For the Family 6 switch in sys::getHostCPUName, an unrecognized model was
reported as "i686". That's a really bad default since it means that new
CPUs will be treated as if they can only use 32-bit code. This just looks
at the cpuid extended feature flag for 64 bit support, and if that is set,
it uses a default x86-64 cpu. Similar logic is already used for the Family
15 code. <rdar://problem/11314502>
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@156486 91177308-0d34-0410-b5e6-96231b3b80d8
---
lib/Support/Host.cpp | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/lib/Support/Host.cpp
+++ b/lib/Support/Host.cpp
@@ -231,7 +231,7 @@
// the 45 nm process
return "atom";
- default: return "i686";
+ default: return (Em64T) ? "x86-64" : "i686";
}
case 15: {
switch (Model) {
>From 4335e3495d5cd6784a99749879114caf22b9d398 Mon Sep 17 00:00:00 2001
From: Benjamin Kramer <[email protected]>
Date: Wed, 26 Sep 2012 18:21:47 +0000
Subject: [PATCH] Add support for detecting some corei7-class Xeons.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164714 91177308-0d34-0410-b5e6-96231b3b80d8
---
lib/Support/Host.cpp | 2 ++
1 file changed, 2 insertions(+)
diff --git a/lib/Support/Host.cpp b/lib/Support/Host.cpp
index a13b9e2..9ee3f2d 100644
--- a/lib/Support/Host.cpp
+++ b/lib/Support/Host.cpp
@@ -234,6 +234,8 @@ std::string sys::getHostCPUName() {
case 37: // Intel Core i7, laptop version.
case 44: // Intel Core i7 processor and Intel Xeon processor. All
// processors are manufactured using the 32 nm process.
+ case 46: // Nehalem EX
+ case 47: // Westmere EX
return "corei7";
// SandyBridge:
--
1.7.10.4
--- End Message ---
--- Begin Message ---
Version: 3.0-10+rm
Dear submitter,
as the package llvm-3.0 has just been removed from the Debian archive
unstable we hereby close the associated bug reports. We are sorry
that we couldn't deal with your issue properly.
For details on the removal, please see http://bugs.debian.org/706706
The version of this package that was in Debian prior to this removal
can still be found using http://snapshot.debian.org/.
This message was generated automatically; if you believe that there is
a problem with it please contact the archive administrators by mailing
[email protected].
Debian distribution maintenance software
pp.
Luca Falavigna (the ftpmaster behind the curtain)
--- End Message ---
