[llvm-bugs] [Bug 32251] New: Miscompilation of External/SPEC/CFP2006/444.namd

[via llvm-bugs]

http://bugs.llvm.org/show_bug.cgi?id=32251

            Bug ID: 32251
           Summary: Miscompilation of External/SPEC/CFP2006/444.namd
           Product: Polly
           Version: unspecified
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Optimizer
          Assignee: polly-dev at googlegroups.com
          Reporter: llvm at meinersbur.de
                CC: llvm-bugs at lists.llvm.org

SPEC CPU 2016 1.1 444.namd currently fails with Polly (-O3 -mllvm -polly -mllvm
-polly-process-unprofitable). Trying to bisect the commit causing it, I could
go back to r288174 where it still fails. This is the first commit where Polly
compiles with current LLVM/Clang trunk (r297414)

This might be something uncovered by an LLVM change. My next step would be to
bisect with https://github.com/llvm-project/llvm-project .

Command line:
$ /tmp/lnt/bin/python /tmp/lnt/bin/lnt runtest test-suite --sandbox
/tmp/runtests-858grax9 --test-suite /root/src/llvm/projects/test-suite --cc
/tmp/runtests-858grax9/cc --cxx /tmp/runtests-858grax9/c++ --use-lit
/root/build/llvm/release/bin/llvm-lit --cmake-define
TEST_SUITE_LLVM_SIZE=/root/build/llvm/release/bin/llvm-size --use-cmake
/usr/bin/cmake --cmake-cache ReleaseNoLTO --no-timestamp --benchmarking-only
--threads 8 --build-threads 8 --only-test External/SPEC/CFP2006/444.namd
--cppflags -mllvm --cppflags -polly --cppflags -mllvm --cppflags
-polly-process-unprofitable

[...]

FAIL: test-suite :: External/SPEC/CFP2006/444.namd/444.namd.test (1 of 1)
******************** TEST 'test-suite ::
External/SPEC/CFP2006/444.namd/444.namd.test' FAILED ********************

/tmp/runtests-858grax9/build/tools/timeit --limit-core 0 --limit-cpu 7200
--timeout 7200 --limit-file-size 104857600 --limit-rss-size 838860800
--redirect-stdout
/tmp/runtests-858grax9/build/External/SPEC/CFP2006/444.namd/namd.stdout
--redirect-input /dev/null --summary
/tmp/runtests-858grax9/build/External/SPEC/CFP2006/444.namd/Output/444.namd.test.time
/tmp/runtests-858grax9/build/External/SPEC/CFP2006/444.namd/444.namd --input
/root/src/llvm/projects/test-suite/test-suite-externals/speccpu2006/benchspec/CPU2006/444.namd/data/all/input/namd.input
--iterations 1 --output
/tmp/runtests-858grax9/build/External/SPEC/CFP2006/444.namd/namd.out
/tmp/runtests-858grax9/build/tools/fpcmp -a 0.00001
/root/src/llvm/projects/test-suite/test-suite-externals/speccpu2006/benchspec/CPU2006/444.namd/data/train/output/namd.out
/tmp/runtests-858grax9/build/External/SPEC/CFP2006/444.namd/namd.out

/tmp/runtests-858grax9/build/tools/fpcmp: FP Comparison failed, not a numeric
difference between ' ' and 'R'

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