[LLVMbugs] [Bug 14185] New: FMA4 causes segfault with spec cpu2006 "namd" benchmark and miscompare for others
bugzilla-daemon at llvm.org
bugzilla-daemon at llvm.org
Fri Oct 26 04:48:20 PDT 2012
http://llvm.org/bugs/show_bug.cgi?id=14185
Bug #: 14185
Summary: FMA4 causes segfault with spec cpu2006 "namd"
benchmark and miscompare for others
Product: clang
Version: trunk
Platform: PC
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P
Component: Frontend
AssignedTo: unassignedclangbugs at nondot.org
ReportedBy: anitha.boyapati at gmail.com
CC: llvmbugs at cs.uiuc.edu
Classification: Unclassified
Important contents of config file are:
#####################################################################
# FP Peak Tuning
#####################################################################
fp=peak=default:
#FIX ffp-contract=fast. Due to dragonegg usign standard
COPTIMIZE = -O2 -g -march=bdver2 -mavx -mno-fma -save-temps -mfma4
-ffp-contract=fast
CXXOPTIMIZE = -O2 -g -march=bdver2 -mavx -mno-fma -save-temps -mfma4
-ffp-contract=fast
----------------------------------
Run the "namd" from spec cpu2006 as follows:
runspec --action=run --rebuild -r 1 --config=qa_llvm_fma4.cfg --iterations 1
namd --tune=peak
444.namd: copy 0 non-zero return code (exit code=11, signal=0)
****************************************
Contents of namd.err
****************************************
run.sh: line 1: 9835 Segmentation fault
../run_peak_ref_llvm.0002/namd_peak.llvm --input namd.input --iterations 38
--output namd.out
****************************************
Invalid run; unable to continue.
If you wish to ignore errors please use '-I' or ignore_errors
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