Faliure building unregistered GHC: pprGlobalReg: Unsupported register: CCCS

Hi,

the 7.4.1 release candidate failed to build on arm; previous versions built fine. It would be great if arm support would not be dropped, if it can be helped:

"inplace/bin/ghc-stage1"   -H32m -O -lffi -optl-pthread -optc-mlong-calls    -package-name ghc-prim-0.2.0.0 -hide-all-packages -i -ilibraries/ghc-prim/. -ilibraries/ghc-prim/dist-install/build -ilibraries/ghc-prim/dist-install/build/autogen -Ilibraries/ghc-prim/dist-install/build -Ilibraries/ghc-prim/dist-install/build/autogen -Ilibraries/ghc-prim/.    -optP-include -optPlibraries/ghc-prim/dist-install/build/autogen/cabal_macros.h -package rts-1.0  -package-name ghc-prim -XHaskell98 -XCPP -XMagicHash -XForeignFunctionInterface -XUnliftedFFITypes -XUnboxedTuples -XEmptyDataDecls -XNoImplicitPrelude -O2  -no-user-package-conf -rtsopts     -odir libraries/ghc-prim/dist-install/build -hidir libraries/ghc-prim/dist-install/build -stubdir libraries/ghc-prim/dist-install/build -hisuf hi -osuf  o -hcsuf hc -c libraries/ghc-prim/dist-install/build/GHC/PrimopWrappers.hs -o libraries/ghc-prim/dist-install/build/GHC/PrimopWrappers.o
ghc-stage1: panic! (the 'impossible' happened)
  (GHC version 7.4.0.20111219 for arm-unknown-linux):
	pprGlobalReg: Unsupported register: CCCS

Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug

make[2]: *** [libraries/ghc-prim/dist-install/build/GHC/PrimopWrappers.o] Error 1

(Full log at https://buildd.debian.org/status/fetch.php?pkg=ghc&arch=armel&ver=7.4.0.20111219-2&stamp=1324673390)

Thanks, Joachim on behalf of the Debian Haskell Team

Trac metadata

Trac field	Value
Version	7.3
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler
Test case
Differential revisions
BlockedBy
Related
Blocking
CC
Operating system
Architecture	arm

changed weight to 5

added Tbug Trac import labels

mentioned in issue #5734 (closed)

mentioned in issue #5735 (closed)

changed title from Build failure on arm: pprGlobalReg: Unsupported register: CCCS to Faliure building unregistered GHC: pprGlobalReg: Unsupported register: CCCS

This bug, after fixing more trivial bugs, now appears on mips, s390(x), sparc, armel, but not on powerpc, i386 and amd64 – precisely the unregistered arches. So this does not seem to be arch-specific, but rather a general breakage of unregistered building.

Trac metadata

Trac field	Value
Architecture	arm → Unknown/Multiple

Judging from the logs, this might have been caused by this patch by Simon Marlow: [50de6034]

Yes, this is reproducible even on i386, e.g. with this mk/build.mk:

GhcLibWays = v

GhcUnregisterised    = YES
GhcWithNativeCodeGen = NO

SRC_HC_OPTS          = -O -H64m
GhcStage1HcOpts      = -O
GhcStage2HcOpts      = -O2
GhcHcOpts            = -Rghc-timing
GhcLibHcOpts         = -O2
SplitObjs            = NO
HADDOCK_DOCS         = NO
BUILD_DOCBOOK_HTML   = NO
BUILD_DOCBOOK_PS     = NO
BUILD_DOCBOOK_PDF    = NO
GhcLibWays     += p

# NoFib settings
NoFibWays =
STRIP_CMD = :

It would be helpful for us if you could include such a build in your automatic build tests.

changed milestone to %7.4.1

changed weight to 10

Trac metadata

Trac field	Value
Priority	normal → highest

assigned to @simonmar

Thanks, I'll fix.

Fixed:

commit d7d56f58

Author: Simon Marlow <marlowsd@gmail.com>
Date:   Tue Jan 3 16:21:41 2012 +0000

    Fix the C backend after making CCCS an STG register

added 1 deleted label

closed

Merged as f106b173

Trac metadata

Trac field	Value
Resolution	Unresolved → ResolvedFixed

removed 1 deleted label

added ghc build failure label

added Phighest label