Re: Increasing minimum 'i386' processor
Matthias Klose writes: > On 11/19/2011 11:42 PM, Ben Hutchings wrote: >> The i386 architecture was the first in Linux and in Debian, but we have >> long since dropped support for the original i386-compatible processors >> and now require a minimum of a 486-class processor. >> >> I think it is time to increase the minimum requirement to 586-class, if >> not for wheezy then immediately after. > > note that squeeze is built this way, and single packages like openjdk only > build > for 586. > >> (Later it should be increased >> further, and eventually i386 should be reduced to a partial architecture >> that may be installed on amd64 systems.) This would allow the use of >> optimisations and new instructions throughout userland that improve >> performance for the vast majority of users. > > could you give numbers what kind of improvements you would expect? The > biggest > burden for i386 is the register pressure, which you won't fix with targeting a > newer processor. The better approach would be a new port, the x32 > architecture; > I don't know if anybody did look into building a distribution for this > architecture yet. The next thing could be to default to sse2 math instead of > x87 (didn't look if this is already the default for x32). > > Matthias Where the relevant patches added to binutils and gcc for this? MfG Goswin -- To UNSUBSCRIBE, email to debian-gcc-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/87obw3w2uc.fsf@frosties.localnet
Bug#633479: ICE: gcc-4.6: ICE on armhf with oss4-4.2-build2004-1
tag 633479 + patch
user debian-...@lists.debian.org
usertags 633479 + eabi
usertags 633479 + armhf
thanks
Hello,
On Sun, Jul 10, 2011 at 08:17:46PM +0300, Konstantinos Margaritis wrote:
> Package: gcc-4.6
> Version: 4.6.1-2
> Severity: important
>
> Hi,
>
> gcc fails with an ICE on package oss4 on armhf:
>
> http://buildd.debian-ports.org/status/fetch.php?pkg=oss4&arch=armhf&ver=4.2-build2004-1&stamp=1310086627
>
> Attached is the smallest trimmed down file that is able to reproduce the ICE:
>
> $ gcc-4.6 -O ossplay_decode_pre.new.c -c -o ossplay_decode_pre.o
> ossplay_decode_pre.new.c: In function ‘decode_amplify’:
> ossplay_decode_pre.new.c:148:1: internal compiler error: in
> get_arm_condition_code, at config/arm/arm.c:17152
> Please submit a full bug report,
> with preprocessed source if appropriate.
> See for instructions.
I have backported fix for PR49030 from upstream trunk to gcc-4.6 Debian
package. (Note the backport fails to apply on gcc-4.5), let me know if it is
worth to port it.
I have built a compiler for armel and armhf successfully which has lead me to
successful builds for oss4 on armhf:
=> dpkg-genchanges >../oss4_4.2-build2005-1_armhf.changes
I am currently building mksh on armhf and it does not seem to show the ICE.
Please consider adding this fix for PR49030 on next upload.
Cheers,
--
Héctor Orón
diff -u gcc-4.6-4.6.2/debian/rules.patch gcc-4.6-4.6.2/debian/rules.patch
--- gcc-4.6-4.6.2/debian/rules.patch
+++ gcc-4.6-4.6.2/debian/rules.patch
@@ -85,6 +85,7 @@
libffi-powerpc-sf \
libffi-powerpc-sysv-without-string-ops \
arm-dynamic-linker \
+ pr49030 \
# $(if $(filter yes, $(DEB_CROSS)),,gcc-print-file-name) \
# libstdc++-nothumb-check \
diff -u gcc-4.6-4.6.2/debian/changelog gcc-4.6-4.6.2/debian/changelog
--- gcc-4.6-4.6.2/debian/changelog
+++ gcc-4.6-4.6.2/debian/changelog
@@ -1,3 +1,9 @@
+gcc-4.6 (4.6.2-5+armhf.1) unstable; urgency=low
+
+ * Fix PR target/49030.
+
+ -- Hector Oron Wed, 23 Nov 2011 00:02:17 +
+
gcc-4.6 (4.6.2-5) unstable; urgency=low
* Update to SVN 2021 (r181596) from the gcc-4_6-branch.
only in patch2:
unchanged:
--- gcc-4.6-4.6.2.orig/debian/patches/pr49030.diff
+++ gcc-4.6-4.6.2/debian/patches/pr49030.diff
@@ -0,0 +1,197 @@
+# DP: Fix GCC ICE
+
+gcc/
+ PR target/49030
+ * config/arm/arm-protos.h (maybe_get_arm_condition_code): Declare.
+ * config/arm/arm.c (maybe_get_arm_condition_code): New function,
+ reusing the old code from get_arm_condition_code. Return ARM_NV
+ for invalid comparison codes.
+ (get_arm_condition_code): Redefine in terms of
+ maybe_get_arm_condition_code.
+ * config/arm/predicates.md (arm_comparison_operator): Use
+ maybe_get_arm_condition_code.
+
+gcc/testsuite/
+ PR target/49030
+ * gcc.dg/torture/pr49030.c: New test.
+ PR target/49030
+ * gcc.dg/torture/pr49030.c: Run only if target int32plus.
+
+--- a/src/gcc/config/arm/arm.c 2011-11-22 23:17:59.405162471 +
b/src/gcc/config/arm/arm.c 2011-11-22 23:28:36.321162194 +
+@@ -17022,10 +17022,10 @@
+decremented/zeroed by arm_asm_output_opcode as the insns are output. */
+
+ /* Returns the index of the ARM condition code string in
+- `arm_condition_codes'. COMPARISON should be an rtx like
+- `(eq (...) (...))'. */
+-static enum arm_cond_code
+-get_arm_condition_code (rtx comparison)
++ `arm_condition_codes', or ARM_NV if the comparison is invalid.
++ COMPARISON should be an rtx like `(eq (...) (...))'. */
++enum arm_cond_code
++maybe_get_arm_condition_code (rtx comparison)
+ {
+ enum machine_mode mode = GET_MODE (XEXP (comparison, 0));
+ enum arm_cond_code code;
+@@ -17049,11 +17049,11 @@
+ case CC_DLTUmode: code = ARM_CC;
+
+ dominance:
+- gcc_assert (comp_code == EQ || comp_code == NE);
+-
+ if (comp_code == EQ)
+ return ARM_INVERSE_CONDITION_CODE (code);
+- return code;
++ if (comp_code == NE)
++ return code;
++ return ARM_NV;
+
+ case CC_NOOVmode:
+ switch (comp_code)
+@@ -17062,7 +17062,7 @@
+ case EQ: return ARM_EQ;
+ case GE: return ARM_PL;
+ case LT: return ARM_MI;
+- default: gcc_unreachable ();
++ default: return ARM_NV;
+ }
+
+ case CC_Zmode:
+@@ -17070,7 +17070,7 @@
+ {
+ case NE: return ARM_NE;
+ case EQ: return ARM_EQ;
+- default: gcc_unreachable ();
++ default: return ARM_NV;
+ }
+
+ case CC_Nmode:
+@@ -17078,7 +17078,7 @@
+ {
+ case NE: return ARM_MI;
+ case EQ: return ARM_PL;
+- default: gcc_unreachable ();
++ default: return ARM_NV;
+ }
+
+ case CCFPEmode:
+@@ -17103,7 +17103,7 @@
+ /* UNEQ and LTGT do not have a representation. */
+ case UNEQ: /* Fall through. */
+ case LTGT: /* Fall through. */
+- default: gcc_unreachable ();
++ default: return ARM_NV;
+ }
+
+ case CC_SWPmode:
+@@ -17119,7 +17119,7 @@
+ case GTU: return ARM_CC;
+ case LEU: return ARM_CS;
+ case LTU: return ARM_HI;
+- default: gcc_unreachable ();
++ default: return ARM_NV;
+ }
+
+ case CC_Cmode:
+@@ -17127,7 +17127,7 @@
+
Processed: Re: Bug#633479: ICE: gcc-4.6: ICE on armhf with oss4-4.2-build2004-1
Processing commands for cont...@bugs.debian.org: > tag 633479 + patch Bug #633479 [gcc-4.6] ICE: gcc-4.6: ICE on armel+armhf with mksh, on armhf with oss4-4.2-build2004-1 Added tag(s) patch. > user debian-...@lists.debian.org Setting user to debian-...@lists.debian.org (was zu...@debian.org). > usertags 633479 + eabi Bug#633479: ICE: gcc-4.6: ICE on armel+armhf with mksh, on armhf with oss4-4.2-build2004-1 There were no usertags set. Usertags are now: eabi. > usertags 633479 + armhf Bug#633479: ICE: gcc-4.6: ICE on armel+armhf with mksh, on armhf with oss4-4.2-build2004-1 Usertags were: eabi. Usertags are now: armhf eabi. > thanks Stopping processing here. Please contact me if you need assistance. -- 633479: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=633479 Debian Bug Tracking System Contact ow...@bugs.debian.org with problems -- To UNSUBSCRIBE, email to debian-gcc-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/handler.s.c.13220482199187.transcr...@bugs.debian.org
Bug#633479: gcc-4.6: ICE: fixed mksh
Hi, Just as quick note, mksh has been built successfully too. -- Héctor Orón -.. . -... .. .- -. -.. . ...- . .-.. --- .--. . .-. -- To UNSUBSCRIBE, email to debian-gcc-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/caodfwegvg4+6cq_kt7p6m7kdihuan6bp7g+wbtegsdlz4os...@mail.gmail.com
Re: Increasing minimum 'i386' processor
[Goswin von Brederlow] > Where the relevant patches added to binutils and gcc for this? See for yourself: http://sites.google.com/site/x32abi/ -- Peter Samuelson | org-tld!p12n!peter | http://p12n.org/ -- To UNSUBSCRIBE, email to debian-gcc-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/2023122412.gf2...@p12n.org
Re: Increasing minimum 'i386' processor
On Wed, 2011-11-23 at 00:44 +0100, Matthias Klose wrote: > On 11/19/2011 11:42 PM, Ben Hutchings wrote: > > The i386 architecture was the first in Linux and in Debian, but we have > > long since dropped support for the original i386-compatible processors > > and now require a minimum of a 486-class processor. > > > > I think it is time to increase the minimum requirement to 586-class, if > > not for wheezy then immediately after. > > note that squeeze is built this way, and single packages like openjdk only > build > for 586. So I was told. I must have missed the discussion of this prior to the change. Somehow it seems to be missing from the release notes too. > > (Later it should be increased > > further, and eventually i386 should be reduced to a partial architecture > > that may be installed on amd64 systems.) This would allow the use of > > optimisations and new instructions throughout userland that improve > > performance for the vast majority of users. > > could you give numbers what kind of improvements you would expect? [...] That I don't know. Ben. -- Ben Hutchings Teamwork is essential - it allows you to blame someone else. signature.asc Description: This is a digitally signed message part
Processing of gcc-4.6_4.6.2-5_kfreebsd-amd64.changes
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