diff options
Diffstat (limited to 'gcc/config/i386/i386-features.cc')
| -rw-r--r-- | gcc/config/i386/i386-features.cc | 39 |
1 files changed, 35 insertions, 4 deletions
diff --git a/gcc/config/i386/i386-features.cc b/gcc/config/i386/i386-features.cc index 31f3ee2..1ba5ac4 100644 --- a/gcc/config/i386/i386-features.cc +++ b/gcc/config/i386/i386-features.cc @@ -3309,8 +3309,16 @@ ix86_get_vector_load_mode (unsigned int size) mode = V64QImode; else if (size == 32) mode = V32QImode; - else + else if (size == 16) mode = V16QImode; + else if (size == 8) + mode = V8QImode; + else if (size == 4) + mode = V4QImode; + else if (size == 2) + mode = V2QImode; + else + gcc_unreachable (); return mode; } @@ -3338,13 +3346,36 @@ replace_vector_const (machine_mode vector_mode, rtx vector_const, if (SUBREG_P (dest) || mode == vector_mode) replace = vector_const; else - replace = gen_rtx_SUBREG (mode, vector_const, 0); + { + unsigned int size = GET_MODE_SIZE (mode); + if (size < ix86_regmode_natural_size (mode)) + { + /* If the mode size is smaller than its natural size, + first insert an extra move with a QI vector SUBREG + of the same size to avoid validate_subreg failure. */ + machine_mode vmode = ix86_get_vector_load_mode (size); + rtx vreg; + if (mode == vmode) + vreg = vector_const; + else + { + vreg = gen_reg_rtx (vmode); + rtx vsubreg = gen_rtx_SUBREG (vmode, vector_const, 0); + rtx pat = gen_rtx_SET (vreg, vsubreg); + rtx_insn *vinsn = emit_insn_before (pat, insn); + df_insn_rescan (vinsn); + } + replace = gen_rtx_SUBREG (mode, vreg, 0); + } + else + replace = gen_rtx_SUBREG (mode, vector_const, 0); + } - /* NB: Don't run recog_memoized here since vector SUBREG may not - be valid. Let LRA handle vector SUBREG. */ SET_SRC (set) = replace; /* Drop possible dead definitions. */ PATTERN (insn) = set; + INSN_CODE (insn) = -1; + recog_memoized (insn); df_insn_rescan (insn); } } |