diff options
Diffstat (limited to 'gcc/stor-layout.c')
| -rw-r--r-- | gcc/stor-layout.c | 20 |
1 files changed, 13 insertions, 7 deletions
diff --git a/gcc/stor-layout.c b/gcc/stor-layout.c index 5c87a638376..e1137f5b9ff 100644 --- a/gcc/stor-layout.c +++ b/gcc/stor-layout.c @@ -2160,26 +2160,32 @@ get_best_mode (int bitsize, int bitpos, unsigned int align, } /* Gets minimal and maximal values for MODE (signed or unsigned depending on - SIGN). */ + SIGN). The returned constants are made to be usable in TARGET_MODE. */ void -get_mode_bounds (enum machine_mode mode, int sign, rtx *mmin, rtx *mmax) +get_mode_bounds (enum machine_mode mode, int sign, + enum machine_mode target_mode, + rtx *mmin, rtx *mmax) { - int size = GET_MODE_BITSIZE (mode); + unsigned size = GET_MODE_BITSIZE (mode); + unsigned HOST_WIDE_INT min_val, max_val; if (size > HOST_BITS_PER_WIDE_INT) abort (); if (sign) { - *mmin = GEN_INT (-((unsigned HOST_WIDE_INT) 1 << (size - 1))); - *mmax = GEN_INT (((unsigned HOST_WIDE_INT) 1 << (size - 1)) - 1); + min_val = -((unsigned HOST_WIDE_INT) 1 << (size - 1)); + max_val = ((unsigned HOST_WIDE_INT) 1 << (size - 1)) - 1; } else { - *mmin = const0_rtx; - *mmax = GEN_INT (((unsigned HOST_WIDE_INT) 1 << (size - 1) << 1) - 1); + min_val = 0; + max_val = ((unsigned HOST_WIDE_INT) 1 << (size - 1) << 1) - 1; } + + *mmin = GEN_INT (trunc_int_for_mode (min_val, target_mode)); + *mmax = GEN_INT (trunc_int_for_mode (max_val, target_mode)); } #include "gt-stor-layout.h" |