diff options
Diffstat (limited to 'gcc/lra-constraints.c')
| -rw-r--r-- | gcc/lra-constraints.c | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/gcc/lra-constraints.c b/gcc/lra-constraints.c index 14d5f1d..56ab5b4 100644 --- a/gcc/lra-constraints.c +++ b/gcc/lra-constraints.c @@ -1307,7 +1307,21 @@ process_addr_reg (rtx *loc, bool check_only_p, rtx_insn **before, rtx_insn **aft subreg_p = GET_CODE (*loc) == SUBREG; if (subreg_p) - loc = &SUBREG_REG (*loc); + { + reg = SUBREG_REG (*loc); + mode = GET_MODE (reg); + + /* For mode with size bigger than ptr_mode, there unlikely to be "mov" + between two registers with different classes, but there normally will + be "mov" which transfers element of vector register into the general + register, and this normally will be a subreg which should be reloaded + as a whole. This is particularly likely to be triggered when + -fno-split-wide-types specified. */ + if (in_class_p (reg, cl, &new_class) + || GET_MODE_SIZE (mode) <= GET_MODE_SIZE (ptr_mode)) + loc = &SUBREG_REG (*loc); + } + reg = *loc; mode = GET_MODE (reg); if (! REG_P (reg)) |