On Sun, Feb 11, 2007 at 05:11:15PM +0100, Hanno Meyer-Thurow wrote: > On 07 Feb 2007 15:36:14 -0800 > Ian Lance Taylor <[EMAIL PROTECTED]> wrote: > > > Can anybody else out there recreate this on their x86_64 system? > > Not that I could not recreate the segfault but I found a way to hide the > segfault. Instead of optimizing with nocona > > make \ > LDFLAGS="-Wl,-O1 -Wl,--as-needed -Wl,--sort-common" \ > STAGE1_CFLAGS="-O" \ > LIBPATH="/usr/lib/gcj-4.3.0_alpha20070209/lib64" \ > BOOT_CFLAGS=" -O2 -mtune=nocona -march=nocona -pipe -msse3 > -mfpmath=sse" \ > bootstrap >
-mtune=nocona seems to miscompile the stage3 compiler. I got bash-3.1$ make compare Comparing stages 2 and 3 warning: ./cc1-checksum.o differs Bootstrap comparison failure! ./tree-vrp.o differs ./tree-ssa-operands.o differs ./build/genpreds.o differs ./build/gengtype-yacc.o differs ./build/genattrtab.o differs ./tree-ssa-alias.o differs ./tree-eh.o differs ./tree-tailcall.o differs ./ipa-reference.o differs ./c-common.o differs ./sched-rgn.o differs ./dominance.o differs ./reload1.o differs ./tree-cfg.o differs ./flow.o differs ./fold-const.o differs ./gcc.o differs ./c-decl.o differs ./tree-ssa-dce.o differs ./bt-load.o differs ./tree-ssa-ter.o differs ./function.o differs ./ddg.o differs ./tree.o differs ./tree-ssa.o differs ./loop-unroll.o differs ./expmed.o differs ./df-scan.o differs ./tree-sra.o differs ./resource.o differs ./except.o differs ./predict.o differs ./tree-ssa-dse.o differs ./df-core.o differs ./cfgloopmanip.o differs ./calls.o differs ./real.o differs ./gcse.o differs ./bitmap.o differs ./c-pragma.o differs ./explow.o differs ./loop-invariant.o differs ./tree-object-size.o differs ./tree-ssa-structalias.o differs ./sched-deps.o differs ./tree-ssa-threadupdate.o differs ./pretty-print.o differs ./tree-pretty-print.o differs ./tree-ssa-sink.o differs ./df-problems.o differs ./tree-into-ssa.o differs ./lower-subreg.o differs ./caller-save.o differs ./loop-iv.o differs ./tree-nested.o differs ./combine.o differs ./tree-ssa-loop-ivopts.o differs ./c-parser.o differs ./cfgrtl.o differs ./tree-scalar-evolution.o differs ./tree-ssa-live.o differs ./ifcvt.o differs ./expr.o differs ./ipa-type-escape.o differs ./i386.o differs ./local-alloc.o differs ./tree-ssa-dom.o differs ./c-typeck.o differs ./bb-reorder.o differs ./tree-ssa-pre.o differs ./global.o differs ./see.o differs ./tree-ssa-loop-manip.o differs ./cfgcleanup.o differs ./cfgexpand.o differs ./tree-ssa-coalesce.o differs ./stor-layout.o differs make: *** [compare] Error 1 when passed I BOOT_CFLAGS="-O2 -g -mtune=nocona -pipe" to bootstrap. "make bootstrap" should have checked it. Due to a gcc regression: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30767 "make bootstrap" didn't stop when the stage3 compiler was bad. H.J.
