[llvm-bugs] [Bug 45807] New: Clang 10 fails compiling Swift on Fedora Linux on s390x architecture

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=45807

            Bug ID: 45807
           Summary: Clang 10 fails compiling Swift on Fedora Linux on
                    s390x architecture
           Product: clang
           Version: 10.0
          Hardware: Other
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Frontend
          Assignee: unassignedclangbugs at nondot.org
          Reporter: tachoknight at gmail.com
                CC: llvm-bugs at lists.llvm.org, neeilans at live.com,
                    richard-llvm at metafoo.co.uk

Created attachment 23444
  --> https://bugs.llvm.org/attachment.cgi?id=23444&action=edit
Clang-generated shell script and affected cpp file

Hi-

I am trying to build Swift 5.3 on Fedora Linux 32 using Clang 10 in a s390x
environment. It crashes with the following message:

FAILED:
stdlib/public/stubs/CMakeFiles/swiftStdlibStubs-linux-s390x.dir/Stubs.cpp.o
/builddir/build/BUILD/swift-source/build/buildbot_linux/llvm-linux-s390x/./bin/clang++
 -DCMARK_STATIC_DEFINE -DGTEST_HAS_RTTI=0
-DLLVM_DISABLE_ABI_BREAKING_CHECKS_ENFORCING=1 -D_DEBUG
-D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
-Istdlib/public/stubs
-I/builddir/build/BUILD/swift-source/swift/stdlib/public/stubs -Iinclude
-I/builddir/build/BUILD/swift-source/swift/include
-I/builddir/build/BUILD/swift-source/llvm-project/llvm/include
-I/builddir/build/BUILD/swift-source/build/buildbot_linux/llvm-linux-s390x/include
-I/builddir/build/BUILD/swift-source/llvm-project/clang/include
-I/builddir/build/BUILD/swift-source/build/buildbot_linux/llvm-linux-s390x/tools/clang/include
-I/builddir/build/BUILD/swift-source/cmark/src
-I/builddir/build/BUILD/swift-source/build/buildbot_linux/cmark-linux-s390x/src
-I/builddir/build/BUILD/swift-source/swift-corelibs-libdispatch/src/BlocksRuntime
-I/builddir/build/BUILD/swift-source/swift-corelibs-libdispatch
-Wno-unknown-warning-option -Werror=unguarded-availability-new
-fno-stack-protector -fPIC -fvisibility-inlines-hidden -Werror=date-time
-Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter
-Wwrite-strings -Wcast-qual -Wmissing-field-initializers -Wimplicit-fallthrough
-Wcovered-switch-default -Wno-class-memaccess -Wno-noexcept-type
-Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wstring-conversion
-fdiagnostics-color -ffunction-sections -fdata-sections -Werror=switch
-Wdocumentation -Wimplicit-fallthrough -Wunreachable-code -Woverloaded-virtual
-DOBJC_OLD_DISPATCH_PROTOTYPES=0 -O2    -UNDEBUG  -fno-exceptions -fno-rtti
-Werror=gnu -fno-sanitize=all -Wall -Wg
lobal-constructors -Wexit-time-destructors -fvisibility=hidden
-DswiftCore_EXPORTS -I/builddir/build/BUILD/swift-source/swift/include
-DSWIFT_TARGET_LIBRARY_NAME=swiftStdlibStubs -target s390x-unknown-linux-gnu
-O2 -g0 -DNDEBUG -std=c++14 -MD -MT
stdlib/public/stubs/CMakeFiles/swiftStdlibStubs-linux-s390x.dir/Stubs.cpp.o -MF
stdlib/public/stubs/CMakeFiles/swiftStdlibStubs-linux-s390x.dir/Stubs.cpp.o.d
-o stdlib/public/stubs/CMakeFiles/swiftStdlibStubs-linux-s390x.dir/Stubs.cpp.o
-c /builddir/build/BUILD/swift-source/swift/stdlib/public/stubs/Stubs.cpp
fatal error: error in backend: Cannot select: t37: ch = store<(store 2 into
%ir.v, !tbaa !6), trunc to f16> t11, t6, FrameIndex:i64<0>, undef:i64
  t6: f32,ch = CopyFromReg t0, Register:f32 %2
    t5: f32 = Register %2
  t9: i64 = FrameIndex<0>
  t16: i64 = undef
In function: swift_float16ToString
clang-10: error: clang frontend command failed with exit code 70 (use -v to see
invocation)
clang version 10.0.0
Target: s390x-unknown-linux-gnu
Thread model: posix
InstalledDir:
/builddir/build/BUILD/swift-source/build/buildbot_linux/llvm-linux-s390x/./bin
clang-10: note: diagnostic msg: PLEASE submit a bug report to
https://bugs.llvm.org/ and include the crash backtrace, preprocessed source,
and associated run script.
clang-10: note: diagnostic msg:
********************

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang-10: note: diagnostic msg: /tmp/Stubs-e5538b.cpp
clang-10: note: diagnostic msg: /tmp/Stubs-e5538b.sh
clang-10: note: diagnostic msg:

********************

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