[llvm-bugs] [Bug 38961] New: [ARM] compiler-rt still selecting FPU-centric built-ins for FPU-less targets

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=38961

            Bug ID: 38961
           Summary: [ARM] compiler-rt still selecting FPU-centric
                    built-ins for FPU-less targets
           Product: compiler-rt
           Version: 7.0
          Hardware: Other
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: builtins
          Assignee: unassignedbugs at nondot.org
          Reporter: kelledin at gmail.com
                CC: llvm-bugs at lists.llvm.org

When building for 32-bit ARM with no FPU (i.e. CFLAGS="-O2 -march=armv7-a+nofp
-msoft-float"), the build fails as below:

cd /usr/src/llvm/debian/build/projects/compiler-rt/lib/builtins &&
/usr/local/bin/gcc -DVISIBILITY_HIDDEN -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE
-D_LARGEFILE_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS
-D__STDC_LIMIT_MACROS
-I/usr/src/llvm/debian/build/projects/compiler-rt/lib/builtins
-I/usr/src/llvm/projects/compiler-rt/lib/builtins -I/usr/include/libxml2
-I/usr/src/llvm/debian/build/include -I/usr/src/llvm/include  -fPIC -O3
-DNDEBUG    -march=armv7-a -mfloat-abi=soft -fno-lto -std=c11 -o
CMakeFiles/clang_rt.builtins-arm.dir/arm/restore_vfp_d8_d15_regs.S.o -c
/usr/src/llvm/projects/compiler-rt/lib/builtins/arm/restore_vfp_d8_d15_regs.S
/usr/src/llvm/projects/compiler-rt/lib/builtins/arm/restore_vfp_d8_d15_regs.S:
Assembler messages:
/usr/src/llvm/projects/compiler-rt/lib/builtins/arm/restore_vfp_d8_d15_regs.S:30:
Error: selected processor does not support `vldmia sp!,{d8-d15}' in ARM mode
make[3]: ***
[projects/compiler-rt/lib/builtins/CMakeFiles/clang_rt.builtins-arm.dir/build.make:1887:
projects/compiler-rt/lib/builtins/CMakeFiles/clang_rt.builtins-arm.dir/arm/restore_vfp_d8_d15_regs.S.o]
Error 1
make[3]: Leaving directory '/usr/src/llvm/debian/build'
make[2]: *** [CMakeFiles/Makefile2:44587:
projects/compiler-rt/lib/builtins/CMakeFiles/clang_rt.builtins-arm.dir/all]
Error 2
make[2]: Leaving directory '/usr/src/llvm/debian/build'
make[1]: *** [Makefile:155: all] Error 2

Patch is coming shortly.

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