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When we build with isl, there will be a ICE for graphite in both the c/c++ and fortran. The legitimize move cannot take care of below rtl. (set (subreg:DI (reg:TI 237) 8) (subreg:DI (const_poly_int:TI [4, 2]) 8)) Then we will have ice similar to below: internal compiler error: in extract_insn, at recog.cc:2812. This patch would like to take care of the above rtl. Given the value of const_poly_int can hardly excceed the max of int64, we can simply consider the highest 8 bytes of TImode is zero and then set the dest to (const_int 0). The below test cases are fixed by this PATCH. C: FAIL: gcc.dg/graphite/pr111878.c (internal compiler error: in extract_insn, at recog.cc:2812) FAIL: gcc.dg/graphite/pr111878.c (test for excess errors) Fortran: FAIL: gfortran.dg/graphite/vect-pr40979.f90 -O (internal compiler error: in extract_insn, at recog.cc:2812) FAIL: gfortran.dg/graphite/pr29832.f90 -O3 -fomit-frame-pointer -funroll-loops -fpeel-loops -ftracer -finline-functions (internal compiler error: in extract_insn, at recog.cc:2812) FAIL: gfortran.dg/graphite/pr29581.f90 -O3 -g (test for excess errors) FAIL: gfortran.dg/graphite/pr14741.f90 -O (test for excess errors) FAIL: gfortran.dg/graphite/pr29581.f90 -O3 -fomit-frame-pointer -funroll-loops -fpeel-loops -ftracer -finline-functions (test for excess errors) FAIL: gfortran.dg/graphite/vect-pr40979.f90 -O (test for excess errors) FAIL: gfortran.dg/graphite/id-27.f90 -O (internal compiler error: in extract_insn, at recog.cc:2812) FAIL: gfortran.dg/graphite/pr29832.f90 -O3 -g (internal compiler error: in extract_insn, at recog.cc:2812) FAIL: gfortran.dg/graphite/pr29832.f90 -O3 -g (test for excess errors) FAIL: gfortran.dg/graphite/id-27.f90 -O (test for excess errors) FAIL: gfortran.dg/graphite/pr29832.f90 -O3 -fomit-frame-pointer -funroll-loops -fpeel-loops -ftracer -finline-functions (test for excess errors) FAIL: gfortran.dg/graphite/pr29581.f90 -O3 -fomit-frame-pointer -funroll-loops -fpeel-loops -ftracer -finline-functions (internal compiler error: in extract_insn, at recog.cc:2812) FAIL: gfortran.dg/graphite/pr14741.f90 -O (internal compiler error: in extract_insn, at recog.cc:2812) FAIL: gfortran.dg/graphite/pr29581.f90 -O3 -g (internal compiler error: in extract_insn, at recog.cc:2812) The below test suites are passed for this patch: * The rv64gcv fully regression test. * The rv64gc fully regression test. Try to write some RTL code for test but not works well according to existing test cases. Thus, take above as test cases. Please note graphite require the gcc build with isl. PR target/114885 gcc/ChangeLog: * config/riscv/riscv.cc (riscv_legitimize_subreg_const_poly_move): New func impl to take care of (const_int_poly:TI 8). (riscv_legitimize_move): Handle subreg is const_int_poly, Signed-off-by: Pan Li <pan2.li@intel.com> (cherry picked from commit 25213c4c11aa96aff1beda2aa4471cdff29e8953)
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