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Compiling latest mesa-11.2.0-0.devel.11.24ea81a with gcc-6.0.0-0.12 fails while building target vl/libgalliumvl_la-vl_idct.lo from source vl/vl_idct.c with error message: {standard input}: Assembler messages: {standard input}:3899: Error: operand out of range (44 is not between 0 and 31) {standard input}:3903: Error: operand out of range (44 is not between 0 and 31) {standard input}:4309: Error: operand out of range (44 is not between 0 and 31) {standard input}:4313: Error: operand out of range (44 is not between 0 and 31) Complete build log is available at http://ppc.koji.fedoraproject.org/kojifiles/work/tasks/5918/3155918/build.log from koji build - http://ppc.koji.fedoraproject.org/koji/buildinfo?buildID=381622
Created attachment 1130184 [details] asm for file vl_idct.c Error occurs when mesa is built with gcc optimzation -O1 or -O2 enabled. Builds fine when compiled with -O0. After digging more, checked Assembler generated code for file vl_idct.c (available in attachement) and it turns out that assembler code for instruction rlwinm is getting out of range value for 3rd operand which tells how much left bit shift should be done. 3899: rlwinm 29,8,44,20,23 3903: rlwinm 30,10,44,20,23 4309: rlwinm 28,5,44,20,23 4313: rlwinm 30,12,44,20,23 At source code level, error occurs at line number 133 and 134 of file vl_idct.c https://cgit.freedesktop.org/mesa/mesa/tree/src/gallium/auxiliary/vl/vl_idct.c#n133 which is defined in function matrix_mul(). matrix_mul() is called by create_stage1_frag_shader() which is called by init_shaders().
Sinny, it is some inline assembler or C code translated to ppc assembler by compiler?
(In reply to Dan Horák from comment #2) > Sinny, it is some inline assembler or C code translated to ppc assembler by > compiler? It is C code translated to ppc assembler by gcc. To be precise, assembler code is generated by running gcc with following options and flags: $ gcc -DPACKAGE_NAME=\"Mesa\" -DPACKAGE_TARNAME=\"mesa\" -DPACKAGE_VERSION=\"11.2.0-devel\" -DPACKAGE_STRING=\"Mesa\ 11.2.0-devel\" -DPACKAGE_BUGREPORT=\"https://bugs.freedesktop.org/enter_bug.cgi\?product=Mesa\" -DPACKAGE_URL=\"\" -DPACKAGE=\"mesa\" -DVERSION=\"11.2.0-devel\" -DSTDC_HEADERS=1 -DHAVE_SYS_TYPES_H=1 -DHAVE_SYS_STAT_H=1 -DHAVE_STDLIB_H=1 -DHAVE_STRING_H=1 -DHAVE_MEMORY_H=1 -DHAVE_STRINGS_H=1 -DHAVE_INTTYPES_H=1 -DHAVE_STDINT_H=1 -DHAVE_UNISTD_H=1 -DHAVE_DLFCN_H=1 -DLT_OBJDIR=\".libs/\" -DHAVE___BUILTIN_BSWAP32=1 -DHAVE___BUILTIN_BSWAP64=1 -DHAVE___BUILTIN_CLZ=1 -DHAVE___BUILTIN_CLZLL=1 -DHAVE___BUILTIN_CTZ=1 -DHAVE___BUILTIN_EXPECT=1 -DHAVE___BUILTIN_FFS=1 -DHAVE___BUILTIN_FFSLL=1 -DHAVE___BUILTIN_POPCOUNT=1 -DHAVE___BUILTIN_POPCOUNTLL=1 -DHAVE___BUILTIN_UNREACHABLE=1 -DHAVE_FUNC_ATTRIBUTE_CONST=1 -DHAVE_FUNC_ATTRIBUTE_FLATTEN=1 -DHAVE_FUNC_ATTRIBUTE_FORMAT=1 -DHAVE_FUNC_ATTRIBUTE_MALLOC=1 -DHAVE_FUNC_ATTRIBUTE_PACKED=1 -DHAVE_FUNC_ATTRIBUTE_PURE=1 -DHAVE_FUNC_ATTRIBUTE_UNUSED=1 -DHAVE_FUNC_ATTRIBUTE_WARN_UNUSED_RESULT=1 -DHAVE_DLADDR=1 -DHAVE_CLOCK_GETTIME=1 -DHAVE_PTHREAD=1 -I. -I../../../src/loader -I../../../src/gallium/auxiliary/util -I../../../include -I../../../src -I../../../src/gallium/include -I../../../src/gallium/auxiliary -D__STDC_LIMIT_MACROS -D__STDC_CONSTANT_MACROS -D_GNU_SOURCE -DNDEBUG -DTEXTURE_FLOAT_ENABLED -DHAVE_XLOCALE_H -DHAVE_SYS_SYSCTL_H -DHAVE_STRTOF -DHAVE_MKOSTEMP -DHAVE_DLOPEN -DHAVE_POSIX_MEMALIGN -DMESA_SELINUX -DHAVE_LIBDRM -DGLX_USE_DRM -DHAVE_LIBUDEV -DGLX_INDIRECT_RENDERING -DGLX_DIRECT_RENDERING -DGLX_USE_TLS -DHAVE_ALIAS -DHAVE_DRI3 -DHAVE_MINCORE -DHAVE_LLVM=0x0308 -DMESA_LLVM_VERSION_PATCH=0 -fvisibility=hidden -Werror=pointer-arith -Werror=vla -Werror=declaration-after-statement -I/usr/include -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/usr/include/libdrm -O2 -g -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -m64 -Wall -std=c99 -Werror=implicit-function-declaration -Werror=missing-prototypes -fno-strict-aliasing -fno-math-errno -fno-trapping-math -fno-builtin-memcmp -S -o vl/libgalliumvl_la-vl_idct.S `test -f 'vl/vl_idct.c' || echo './'`vl/vl_idct.c I took all default options/flags used during build. Only modification was changing -c to -S and target filename to vl/libgalliumvl_la-vl_idct.S
ok, switching to gcc then Can you reproduce the issue when removing all functions from vl_idct.c expect the matrix_mul()? Also please attach preprocessed vl_idct.c (gcc -E), ideally reduced as much as possible, but still reproducing the issue.
Created attachment 1130245 [details] Intermediate compilation results of file vl_idct.c Removed all functions which doesn't participate in build error. Attachment contains modified vl_idct.c file I used along with intermediate files generated during compilation by gcc.
Tracking this upstream in PR69946.
I forgot to mention that, failure occurs only on ppc64 BE not not ppc64 LE. Successful scratch build of mesa-11.2.0-0.devel.11.24ea81a is available at http://ppc.koji.fedoraproject.org/koji/taskinfo?taskID=3168596
Confirmed gcc-6.0.0-0.13.fc24 enables mesa to be built on Power platforms